Noise filtering (G06K9/40)

ethod and device for colour adjustment // 2628532
FIELD: physics.SUBSTANCE: method of colour adjustment is proposed, and it comprises: obtaining frame data from a frame buffer; converting the frame data from the original colour space to the linear original colour space by a reverse gamma correction process to obtain the frame data in the linear original colour space; converting the frame data in the linear original colour space to a linear target colour space to obtain frame data in the linear target colour space; and performing gamma correction of the frame data in the linear target colour space using the target gamma coefficient to obtain the frame data in the target colour space.EFFECT: in the invention by performing the inverse data frame gamma correction process from a frame buffer, transformation past inverse gamma correction on frame data in the linear target colour space and performing the frame data to gamma correction in the linear target colour space for receiving the frame data in the target colour space, solved the problem of inconsistent effects display of the same data frame to multiple devices, the effect is realised in accordance to coordinated display and the same data shot on different devices.9 cl, 5 dwg
ethod and device for generating image filter // 2628494
FIELD: physics.SUBSTANCE: method for generating an image filter is proposed. The method comprises the step of obtaining a selected image with a filter effect. Further, according to the method, a group of similar images is obtained by using an image with a filter effect, wherein the group of similar images contains, at least, one similar image with a similar structure, as in the image with the filter effect, but without the filter effect. Further, according to the method, the display ratio for converting the group of similar images to the image with the filter effect is calculated and the display ratio is used as an image filter.EFFECT: increasing the accuracy of the self-defined image filter by converting the group of similar images into the image with the filter effect.7 cl, 6 dwg
ethod for eliminating impulse noise in colour images // 2618390
FIELD: physics.SUBSTANCE: method is proposed for eliminating impulse noise in colour images. The method consists in detecting the distorted elements and in further median vector filtering of the distorted elements. According to the method, additionally, the presence or absence of the elements distortion in each colour component is checked. If the elements are distorted not in all the components, then the elements of the undistorted components are selected, and the inter-channel gradient reconstruction of the elements is performed in the distorted component at the corresponding selected elements of the undistorted components. If the elements are distorted in all the components, the vector median filtering of the three colour component elements is performed, and if the component distortion is absent in all the components, the elements of the three colour components remain unchanged.EFFECT: present invention achievement is to improve the restoration accuracy of the colour image elements distorted by the impulse noise.5 dwg

Noise reduction for image sequences // 2603529
FIELD: image forming device.SUBSTANCE: described herein are techniques related to noise reduction for image sequences or videos. Tool also includes a shot detector that is configured to detect a shot change within the sequence of input frames and to trigger the noise spectrum estimator in response to the detected shot change, a noise spectrum validator, and a noise reducer. A noise reduction tool includes a motion estimator configured to estimated motion in the video. Noise spectrum estimator configured to estimate noise in the video. Shot detector configured to trigger the noise estimation process. Noise spectrum validator configured to validate the estimated noise spectrum. Noise reducer to reduce noise in the video using the estimated noise spectrum.EFFECT: reduced noise in video is provided.33 cl, 5 dwg

ethod for noiseless gradient selection of object contours on digital images // 2589301
FIELD: information technology.SUBSTANCE: invention relates to digital image processing. Disclosed is method for noiseless gradient selecting object contours on digital halftone images. Method includes preliminary operation of position estimation of noise on image, after which for each image element four opposing Previtt masks are formed, which values of coefficients are varied depending on availability and position of interference, and in presence of interference of simultaneously at three elements of any of hermetically sealed half masks of differently-directed masks, half mask size is increased by number of enclosing elements intact by interference. To weight coefficients of mask new elements values are assigned, which sum is equal to sum of values of modulus of second half mask. Then, using data of masks approximate modulus gradient image is calculated, and by its threshold conversion is obtained outlines of objects on image.EFFECT: high sensitivity of gradient method of isolation of outlines to useful luminance image drops in conditions of pulse interferences.1 cl, 13 dwg

ethod of increasing visual information content of digital images // 2586585
FIELD: information technology.SUBSTANCE: invention can be used for improvement of a digital colour or halftone image. Improvement of visual informativity of digital images is ensured by analysing image structures using estimation of the brightness contrast, calculated at each decomposition level as a quotient of division of absolute value of the sum of coefficient detailing L component by the sum of L component approximation; on the basis of the result of image structure after obtaining of matrices of reconstructed detailing components of L, a, b components, there is performed smoothing of the image noise microstructure by calculating at each decomposition level of a normalised integral histogram of absolute values of the elements of the matrix of L component reconstructed constituent with obtainment of the function of coefficients of the noise microstructure smoothing, element-wise conversion of matrices of reconstructed detailing constituents L, a, b of image function of the smoothing coefficients noise microstructure.EFFECT: improvement of visual informativity of digital images.4 cl, 6 dwg

Image processing apparatus and image processing method // 2585662
FIELD: information technology.SUBSTANCE: invention relates to a method and an image processing device, in particular to use of a deblocking filter for standard high-efficiency video coding (HEVC). A device for processing images, comprising: a decoding section for decoding an image from encoded stream determination section to perform determination processing to determine whether to apply a deblocking filter to an adjacent block adjacent to block boundaries in a picture, decoded decoding section, filtering section to apply a deblocking filter to neighboring blocks for which a determination section defines need for application of deblocking filter, and a control section with resolution capability determination section to implement processing for a vertical block boundary and horizontal boundary of block using pixels of neighboring blocks of reconstructed image as reference pixels.EFFECT: providing parallel processing using deblocking filter.8 cl, 49 dwg

Image processing apparatus and image processing method // 2578665
FIELD: programming.SUBSTANCE: invention relates to a method and an image processing device, and, in particular, to use of a deblocking filter for standard high-efficiency video coding (HEVC). Image processing device is disclosed, comprising: a decoding section for decoding an image of an encoded stream, a horizontal filtration section for application of deblocking filter to vertical boundary of unit in an image which must be decoded in decoding section, a vertical filtration section for application of deblocking filter to horizontal boundary of unit in image which must be decoded in decoding section, and a control section, as a result of which in said horizontal filtration section several vertical boundaries of unit contained in processed element are concurrently filtered, said element including several coded elements, and in vertical filtration section several horizontal boundaries of unit contained in processed element are concurrently filtered.EFFECT: technical result is providing additional paralleling of processing during deblocking filter application.13 cl, 47 dwg

Background hybrid retouch method for 2d to 3d conversion // 2576490
FIELD: physics.SUBSTANCE: method of retouching a video image background comprises the steps of: obtaining background movement information from a series of frames of a video sequence; for frames with a missing region: transferring pixel data from one or more preceding frames using the background movement information, transferring pixel data from one or more subsequent frames using the background movement information, and merging the said data with partially recovered pixel data in one or more of the said regions on the current frame; selecting a frame with the remaining missing region; performing a spatial retouching procedure on the said frame to recover pixel data of the said missing region; and transferring the recovered pixel data from the said selected frame to all the frames of the sequence where it is possible using the background movement information.EFFECT: enabling video image background retouching.9 cl, 5 dwg

Data processing of images including turbulence effect in fluid // 2559764
FIELD: physics, computation hardware.SUBSTANCE: invention relates to processing of data of serial digital images. In compliance with this process, image digital data are obtained with the help of camera immersed in fluid with elements of turbulence. Turbulence effect is produced at image pixels while folding inverse is performed by simulation of time-averaged image.EFFECT: higher quality of processing.25 cl, 4 dwg

Organisation of image spatial filtration core and device to this end // 2552195
FIELD: physics.SUBSTANCE: in compliance with this method, binary image of initial image fragments is generated by linear convolution with the help of spatial filter, its core including central and peripheral parts. Note here that linear convolution is conducted separately with spatial filter central core and linear parts. Major components used as binary images of initial image fragments are constructed wherein spatial filter central part features an exponential shape. Note also that peripheral part has negative factors and is constructed with the help of exponent proceeding from the sum of said central and peripheral parts being zero.EFFECT: higher quality.2 cl, 5 dwg

ethod, apparatus and computer programme product for compensating eye colour defects // 2547703
FIELD: physics, computer engineering.SUBSTANCE: invention relates to means of compensating for eye colour defects on an image. The method includes computing a first difference image based on the difference between red pixel intensity and green pixel intensity of each set of pixels associated with a first eye region on the image, processing the first difference image to compute a gradient and a projection associated with said gradient, determining a central point based on the projection and computing a first eye colour defect region based on the central point and the plurality of red pixels from said set.EFFECT: high efficiency of detecting red eye effect on an image.25 cl, 8 dwg

Device for detecting defects on archival photographs // 2541920
FIELD: physics, computer engineering.SUBSTANCE: invention relates to computer engineering and can be used in image analysis and processing systems and in digital television. The device comprises a preprocessing unit 1, a control unit 2, a first convolution computing unit 3, a second convolution computing unit 4, a second Gabor mask generating unit 5, a first Gabor mask generating unit 6, a first binarisation unit 7, a second binarisation unit 8, a first mask storage unit 9, a second mask storage unit 10, an adder 11, a post-processing unit 12, a resultant defect mask storage unit 13.EFFECT: detecting the position of defects on archival photographs with insufficient prior information on statistical characteristics of distortions.2 dwg

ethod and apparatus for detecting defects on video signals // 2535449
FIELD: physics, computer engineering.SUBSTANCE: invention relates to computer engineering and can be used in video sequence analysis and processing systems and digital television. The method of detecting defects on video signals includes analysing differential images of adjacent frames. Binarisation, expansion and joining operations are then applied to the differential images of adjacent frames. Non-zero values are analysed on the obtained arrays, for which a defectiveness decision is made on the initial frames based on dispersion of the initial values.EFFECT: detecting the position of defects on video signals with insufficient prior information about statistical characteristics of additive noise and useful component function.2 cl, 1 dwg

ethod to determine pixon map in iterative image reconstruction and spectral analysis // 2532704
FIELD: physics, computer engineering.SUBSTANCE: invention relates to means of reconstructing a surveillance object on an image. The method comprises creating an object model in space, converting the object model from object space into a data space to obtain a data model, selecting a merit function to determine approximation of the data model, determining an updating variable of the object model, smoothing the updating variable via convolution thereof using each pixon kernel, selecting for each point of the input object a pixon kernel having the greatest size and which corresponds to a predetermined minimum criterion, generating a pixon map by assigning indices at each point of the object, which correspond to the selected pixon kernel, generating an output object model based on indices within the pixon map.EFFECT: reduced object noise in a reconstructed image.21 cl, 14 dwg

ethod of imaging fluorescence traces of object // 2514778
FIELD: physics, optics.SUBSTANCE: invention relates to means of analysing fluorescence traces of an object in a displayed image. The method involves generating a video sequence of frames, dividing said sequence into groups in which the inter-frame difference is less than a given threshold value, calculating the average value of digital codes for frame elements within the groups, determining the maximum value from the obtained average values of digital codes for corresponding frame elements, forming an image of fluorescence traces of the object with the maximum value of digital codes.EFFECT: low level of fluctuation noise in the resultant image due to maximisation of digital codes of elements of average codes obtained beforehand.2 dwg

Deblocking method, deblocking apparatus, deblocking programme and computer-readable recording medium recorded with said programme // 2499360
FIELD: radio engineering, communication.SUBSTANCE: disclosed is a deblocking which includes: a step for detecting direction of an edge, which indicates the direction of change in pixel value of each block, a step for determining direction of a deblocking filter to be applied to a block boundary in accordance with the detected direction of an edge, a target process block containing a block boundary to be deblocked, and a block in contact with the target process block, and a step for applying the deblocking filter to the block boundary in accordance with the determined direction.EFFECT: providing deblocking, wherein texture is preserved in inclined directions which must be retained in the image, and block noise can be efficiently reduced, and improved efficiency of encoding all video information.9 cl, 44 dwg

Image processing method and apparatus // 2494568
FIELD: information technology.SUBSTANCE: image composed of macroblocks measuring 16x16 is selected from a reference frame, wherein each macroblock is assigned a pixel band with width "a", which serves as field region, as a motion-compensated image and is considered as the input image for the filtration process. The value "a" is defined according to the number of filter branches with a finite impulse response. The filtration process is performed using a motion-compensated image as the input image and the predicted image measuring 16x16 pixels is transmitted to the output as the output image of the filtration process. The predicted image is added in an adder to the output image of the inverse orthogonal transformation circuit and the summation result is used as a macroblock making up the decoded frame.EFFECT: generating a predicted image with high accuracy without increasing processor load.6 cl, 1 dwg

ethod of reducing noise in electronic image // 2491629
FIELD: information technology.SUBSTANCE: method involves selecting the high-frequency component of pixel values of an image component; subtracting, from the initial pixel values of the image component, corresponding values of the low-frequency component thereof; calculating mathematical expectation and mean-square deviation of the high-frequency component of all pixels of the image component; dividing the matrix of the high-frequency component into columns or rows and calculating values of mathematical expectation and mean-square deviation of each column or values of mathematical expectation and mean-square deviation of each row; correcting the values of the high-frequency component; an image with reduced noise is formed by summation of values of the low-frequency component and the corrected values of the high-frequency component.EFFECT: reduced noise in an electronic image.3 cl, 15 dwg

Image processing apparatus, method and program // 2479938
FIELD: information technology.SUBSTANCE: deblocking filter 113 adjusts the value of disable_deblocking_filter-idc, slice_alpha_c0_offset_div2 or slice_beta_offset_div2 based on the Activity of an image calculated by an activity calculation unit 141, the total sum of orthogonal transformation coefficients of the image calculated by an orthogonal transformation unit 142, Complexity of the image calculated by the rate control unit 119, or the total sum of prediction errors of the image calculated by a prediction error addition unit 120.EFFECT: improved image quality through correct deblocking.8 cl, 7 dwg

ethod of increasing visual information content of digital greyscale images // 2448367
FIELD: information technology.SUBSTANCE: method involves parallel processing of the component of each decomposition level; brightness-contract transformation parameters are determined by forming a function for correcting brightness levels and a function for correcting contrast, forming a matrix of correction factors for third level decomposition contrast using the function for correcting contrast, reconstructing the family of matrices of scaled contrast correction factors for spatial matching on each level of correction factors with values of the detail component.EFFECT: high quality of displaying digital images.8 dwg

ethod of adaptive smoothing to suppress screen-type pattern of images // 2411584
FIELD: information technologies.SUBSTANCE: method includes performance of the following operations: digital copy of initial printed document is produced in colour space of RGB, brightness difference is detected, and direction of maximum gradient is determined, current count of image is classified for its affiliation to area of brightness difference or uniform area without sharp changes of brightness, Gauss smoothening of current count is made, if it is classified as belonging to uniform area without sharp changes of brightness, current count is smoothened in anisotropic manner, if it is classified as belonging to the area of brightness difference.EFFECT: invention makes it possible to carry out fast single-stage descreening of screen-type pattern images with preservation of contour differences and increased accuracy.5 cl, 9 dwg

ethod and device of video processing, and recording medium that stores program // 2408159
FIELD: information technologies.SUBSTANCE: target image that forms video image is divided into multiple division areas (DA); pass band (PB) width applied to DA is determined; array of filtration ratios (FR) is calculated to realise frequency characteristics corresponding to limitation of band, with application of PB width; image data is filtered with application of FR array; error information value is produced between obtained data and data of initial image, and distribution ratio (DR) is calculated to be used to determine optimal width of PB, on the basis of produced value; optimal width of PB corresponding to DR is defined for each DA, and array of optimal FR is calculated to realise frequency characteristics corresponding to limitation of band, using optimal width of PB; image data of division area is filtered using array of optimal FR; and produced data of each DA are synthesised.EFFECT: generation of filtered image with specified value of image quality assessment.29 cl, 27 dwg

Image processing method and device, image processing program and recording medium storing said program // 2407056
FIELD: information technology.SUBSTANCE: first band pass (BP) is determined based on initial image data; a matrix of filter coefficients (FC) is calculated to obtain frequency characteristics corresponding to limitation of frequency band (FB) using the first BP; data of the first filtered image are generated by filtering data of the initial image using the matrix of first FC; an estimate value of the objective image quality of data of the first filtered image is obtained and the distribution coefficient (DC) is calculated, which is used to determine the optimum BP based on the estimate value of objective image quality; the optimum BP corresponding to the calculated DC is determined using a table in which the corresponding relationship between DC and optimum BP is defined; a matrix of optimum FC is calculated to obtain frequency characteristics corresponding to limitation of FB using the optimum BP; and data of the optimally filtered image is generated by filtering data of the initial image using the matrix of optimum FC.EFFECT: adaptive image filtering process for providing high-quality image.3 cl, 11 dwg

ethod and device for fast noise filtration in digital images // 2405200
FIELD: information technology.SUBSTANCE: filtration of noise from digital images is based on defining a local structure of the image and on non-local averaging in accordance with the defined structure. The local structure of the image is determined by successively rolling up predefined templates with neighbouring pixels and by selecting a RPC template which gives the least error after rolling up. Noise is filtered from the digital image through weighted averaging of pixel values in the search window.EFFECT: fast filtration of noise in digital images which provides high quality of noise suppression without causing distortions.4 cl, 16 dwg

ethod of removing distortions from digital images // 2402070
FIELD: information technology.SUBSTANCE: size of coding unit relative the required printer resolution is evaluated. If the size of the unit is discernible by the human eye, the following steps are carried out: the approximate metric of discernibility of a distortion caused by the Gibbs effect is determined for each coding unit and stored in memory; the approximate metric of discernibility of block distortion is determined for each border of the unit; if the corresponding element of the approximate metric of discernibility of unit distortion exceeds a predefined threshold value, a filter which can suppress block distortions is applied to the given border of the unit; for each coding unit, if the corresponding element of the approximate metric of discernibility of distortion caused by the Gibbs effect exceeds a predefined threshold value, a filter which can suppress distortions is applied to the coding unit in order to suppress distortions caused by the Gibbs effect.EFFECT: preservation of image sharpness.7 cl, 6 dwg

ethod of enhancing digital image quality // 2400815
FIELD: physics.SUBSTANCE: invention proposes to use an imaging model with separation of effects associated with reflecting power of the surface R and effects associated with scene illumination characteristics L, for which: quality of a recorded image is evaluated and if there is need to correct the image, noise is filtered off; a smaller copy of the image is formed; borders for subsequent contrast enhancement at the correction step are defined on the smaller copy; the luminance channel of the initial image is selected and filtered; the image is corrected in accordance with an empirical equation of the LR imaging model: where A is the lower boundary of contrast enhancement of the smaller copy of the image; Φ and ψ are lower and upper boundaries of contrast enhancement of the converted image; JB is the brightness component of the initial image after bilateral filtering; γ is a non-linear conversion parameter and JF is the brightness component of the enhanced image; and the resultant image is converted to RGB colour space.EFFECT: higher image quality.7 cl, 19 dwg, 2 tbl

Coding device, coding method, decoding device, decoding method and programs thereof // 2387093
FIELD: information technology.SUBSTANCE: coding device has definition apparatus for determining image area data meant for processing in order to counter reconstruction implied by granular noise arising in image data coded based on said image data and apparatus for countering reconstruction, designed for processing in order to counter reconstruction for image area data, defined using definition apparatus when coding image data, where when the said image data are coded in data unit data modules, the said definition apparatus determines unit data which form the said image data as the said image area data, and apparatus for countering reconstruction forcibly sets the orthogonal transformation coefficient to zero, which becomes equal to zero when quantisation is carried out using the said unit data, among orthogonal transformation coefficients of unit data defined using the said definition apparatus.EFFECT: improved quality of the decoded image.14 cl, 18 dwg

Unpacking operation for blocks of interpolated frames in application on upconversion of frame transmission rate // 2380853
FIELD: information technologies.SUBSTANCE: low-pass filter is used to filter interpolated video data where extent of filtering by low-pass filter is determined on the basis of boundary strength value determined for interpolated video data and adjacent video data (interpolated and/or not interpolated). Boundary strength is determined on the basis of control video data proximity for interpolated video data and adjacent video data.EFFECT: noise reduction for interpolated data and reduction of interpolation distortion.45 cl, 12 dwg

ethod of space filtration used in coding of images // 2370816
FIELD: information technologies.SUBSTANCE: invention is related to the field of processing and coding of images, in particular to method for space filtration in processing and coding of images. Technical result is achieved by the fact that method of spatial filtration for coding and processing of image includes stage of definition of efficient value of blockiness to detect efficient value of code block blockiness in compliance with number of similar pixels of edge area of code block subject to filtration; stage of image real edge detection to decide whether edge of code block is actual edge of image in compliance with difference of pixel values at two sides of code blocks edge; stage of filtration for filtration of code block in mode of filtration, which corresponds to efficient value of code block blockiness, when edge of code block is not an actual edge of image.EFFECT: adaptive removal of blockiness artifacts in even area of image.10 cl, 4 dwg

ethod of controlling elimination of modularity, taking into account internal bl mode, multi-layer video encoder-decoder using it // 2367113
FIELD: physics; image processing.SUBSTANCE: invention relates to video compression systems, particularly to a filter for eliminating modularity. A video encoder is proposed, which is based on several layers, which uses the filter for eliminating modularity, containing: apparatus for encoding the input frame; apparatus for decoding the said encoded frame; apparatus for selecting filtration intensity for eliminating modularity in accordance with whether a unit, included in the decoded frame, was coded using internal BL mode, where if, at least the current unit and the neighbouring unit were encoded using a mode other than internal BL mode, the given filtration intensity is selected with respect to the boundary between the current unit and the neighbouring unit; and if the current unit and the neighbouring unit were encoded using internal BL mode, filtration intensity, which is lower than filtration intensity, selected with respect to the boundary, is selected; and filtering apparatus for eliminating modularity with respect to the boundary between a unit and a neighbouring unit in accordance with the selected filtration intensity for eliminating modularity.EFFECT: more accurate selection of filtration intensity for eliminating modularity taking into account internal base layer (BL) mode.7 cl, 19 dwg

ethod of enhancing digital images // 2367015
FIELD: physics; image processing.SUBSTANCE: invention relates to processing digital images, particularly, for reducing distortions. A method is proposed for enhancing digital images, involving analysis of image parametres with subsequent extraction of brightness components, construction of a correcting filter and image correction. Images with distortions, superimposed with previous corrections, are corrected without use and analysis of parametres of the original image. Construction of the correcting filter is done on an averaged projection profile with construction of a set of local projections of brightness of the image in the direction defined by the gradient on the selected sections. The image is corrected by selecting pixels of the image in the local region, neighbouring the edges, except pixels directly on the edges. The selected sections are corrected using the constructed correcting filter with regulation of weight coefficients of the filter on local values of the gradient amplitude.EFFECT: efficient reduction and removal of distortions in digital images with superimposed distortions.6 dwg

ethod of detecting distortions, caused by gibbs effect, in jpeg-coding // 2365994
FIELD: information technology.SUBSTANCE: invention relates to digital photography, more specifically to analysis of digital image quality. The method of detecting distortions caused by Gibbs effect in JPEG coding involves evaluation of the size of the coding unit with relative the given resolution of the printing device; determination for each coding unit, whether the size of the unit makes it distinctive to the human eye with the required printing resolution, of the approximate metric of distortion distinctiveness, caused by Gibbs effect; setting to zero corresponding elements of the approximate metric of distortion distinctiveness, caused by Gibbs effect if their values are below the preferred threshold; calculation for zero elements of the approximate metric of distortion distinctiveness, caused by Gibbs effect, of the corresponding distortion dispersion; dispersion is zeroed for the rest of the elements.EFFECT: invention can be used in detecting distortions during JPEG coding.4 cl, 6 dwg

ethod of modularity elimination management considering internal bl mode, and encoder /decoder of multilayered video, using it // 2365062
FIELD: physics; image processing.SUBSTANCE: invention concerns systems of video compression, and, in particular, to the modularity elimination filter, used in the multilayered video decoder. The video decoder which is based on set of layers, using filtration for modularity elimination is offered, and the video decoder contains: agent of restoration of a video frame from an incoming bit stream; agents of choosing modularity elimination filtration intensity according to, whether there was a block included in a reconstructed frame, one is coded by means of an internal BL mode, and if, at least, of: the current block and the next block - is coded by means of the mode, differing from the internal BL mode, selection of filtration intensity in relation to border between the current block and the next block takes place; and if the current block together with the next block has been coded by means of the internal BL mode, selection of filtration intensity, which is lower than filtration intensity chosen in relation to border takes place; and an agent of modularity elimination filtration in relation to the border between the block and the next block according to the chosen modularity elimination filtration intensity.EFFECT: maintenance of more exact choice of modularity elimination filtration intensity at the account of an internal base layer (BL) mode.7 cl, 19 dwg

ethod of space-time anisotropic bilateral filtration of video signals // 2360287
FIELD: information technology.SUBSTANCE: present invention relates to methods and devices for processing video signals and images, and particularly to methods and devices for suppressing noise in video signals and images. The method involves selecting the first region around the current pixel; selecting two lines (horizontal and vertical) through the current pixel and pixels in the region of the current pixel; determining the horizontal gradient; determining the vertical gradient; determining the correlation matrix for the horizontal and vertical gradients, as well as eigenvectors and eigen values of the correlation matrix; determining the number of contours; determining direction of the object contour into the image; calculating weighted coefficients of the time filter; calculating adaptation coefficients of the time and bilateral filters to the power of contours, carrying out time filtering; determining the second region; dividing the second region into two sub-regions along the direction of the contour; carrying out bilateral filtration for the first and second sub-regions; calculating the result of bilateral filtration as a weighted sum of results of filtering the first and second sub-ranges; carrying out approximation of the current pixel using pixels located along the direction of the contour; calculating the final result of filtration as a weighted sum of results of bilateral filtration and approximation along the contour.EFFECT: wider functionality and improved quality of suppressing different types of noises.5 cl, 2 dwg

ethod of deblocking filtration with account for intra-bl mode and utilising its multilayer videocoder/videodecoder // 2355125
FIELD: physics, computation technology.SUBSTANCE: invention concerns technology of video compression, particularly deblocking filters. Invention claims deblocking filter applied in videocoder/videodecoder based on multiple layers. Process of deblocking filter power (filtration power) selection during deblocking filtration in respect of margin between current block encoded in intra-BL mode and adjoining block involves determination of whether current or adjoining block has coefficients. Filter power is selected as first filter power if current or adjoining block features coefficients; and filter power is selected as second filter power if current or adjoining block does not have coefficients, So that first filter power exceeds second filter power.EFFECT: enhanced efficiency of video deblocking.22 cl, 13 dwg

ethod of revealing of unitised contortions at jpeg-coding // 2345415
FIELD: physics, processing of images.SUBSTANCE: invention concerns numeral photo, and in particular, the analysis of quality of the numeral image. Method of revealing of unitised contortions is offered at JPEG-coding, at which: estimate the size of the coding block concerning the demanded resolution of a press; spot for each boundary of the block the approximate metric of discernability of contortion at the coding block transformation in case, the size of the coding block is a distinguishable human eye; Classify, in a case when discernability of contortions at coding transformation exceeds the predetermined threshold, boundary of the block or as boundary which demands correction for elimination of unitised contortions or as boundary which is not subject to unitised contortions, by application of the binary qualifier to the vector of the characteristic signs calculated by means of use proquantised DCT of coefficients of the adjacent blocks and a matrix of quantisation of the image.EFFECT: increase of reliability of detection of unitised contortions at use of the underload computing and temporary resources.4 cl, 4 dwg

ethod for correction of digital x-ray images // 2343538
FIELD: physics; processing of images.SUBSTANCE: invention is related to the field of digital X-ray images processing. Input image is exposed to gamma-correction: extraction of square root for approximation of Poisson noise by model of additive noise distributed according to normal law; for multiplicative model of noise logarithmic conversion is performed; single-level wavelet transform of input image is done, on the basis of which wavelet coefficients are partitioned block-by-block, and standard deviation of noise for every block is assessed; prepared block ratings of noise are smoothened and interpolated by size of initial image, which gives continuously changing and locally adapting assessment of noise for the whole image; initial image is exposed to packet stationary wavelet transform by preset number of decay levels; on the basis of noise level assessment calculated at stage 2, coefficients of transform are exposed to processing with adaptive non-linear operator, which performs threshold suppression of noise and separation of image parts; reverse stationary wavelet transform is done, at that produced image with reduced level of noise and highlighted parts is exposed to reverse gamma-transform.EFFECT: simultaneous suppression of noise and higher contrast of X-ray images.5 dwg

ethod of complexing digital multispectral half-tone images // 2342701
FIELD: physics; image processing.SUBSTANCE: present invention pertains to image processing, and in particular, to the method of complexing digital multispectral half-tone images. Method of complexing digital multispectral half-tone images, including obtaining the initial images, involves breaking down each initial image to low frequency and high frequency components, separate processing of low and high frequency component images, complexing of the components, based on the principle of weighted summation for each pixel, and formation of the resultant image. Each initial image is subjected to multiple-level decomposition by the Haar wavelet through fast discrete static two-dimensional wavelet-transformation with the objective obtaining an approximate component, which is a low frequency image component, and a family of detail components, which are high frequency image components. The values of the matrix of energy characteristics of pixels are determined at all decomposition levels for each image. All detail components are filtered and the detail components are corrected through adaptive change of the values of the detail components in accordance with the inter-level dynamics of their energy characteristics. The noise microstructure is removed through adaptive threshold cut of the values of detail components on each decomposition level. The correcting brightness function and the correcting contrast function are calculated for each decomposition level, the parameter of which is a value of the approximate component. Brightness of ranges of each decomposition level is smoothed out through transformation of the approximate components by correcting brightness functions. The detail components of the contrast correcting function are transformed. A weight function is calculated for each decomposition level, the parameter of which is a value of the energy characteristic. The component of each synthesised image for each pixel at each decomposition level is calculated by weighted summation of the corresponding components of decomposing initial images using weight functions. All detail components of the synthesised image are filtered, and the detail components are corrected through adaptive change of the values of detail components in accordance with the inter-level dynamics of their energy characteristics. Noise microstructures are eliminated through adaptive threshold cut of the values of detail components at each decomposition level. The brightness correcting function and the contrast correcting function are calculated, the parameter of which is the value of approximate components of the synthesised image. The approximate component of the correcting brightness function is transformed. The detail components of the contrast correcting function are transformed. The synthesised image is formed through reconstruction using reverse fast discrete static two-dimensional wavelet-transformation, applied to the detail components of the synthesised image and approximate component of the synthesised image. The brightness range of the resulting image is matched with parameters of the video system.EFFECT: obtaining a high quality image, containing informative image elements of the same scene, obtained in different spectral ranges.9 dwg

Control mode of blocking effect correction, accounting internal bl mode, and using thereof multilayered video coder/ decoder of // 2341034
FIELD: information technologies.SUBSTANCE: invention refers to video compression technology, specifically to blocking effect correction filter applied in multilayered video coder/decoder. Decision mode of blocking effect correction filtration intensity is offered for frame containing block set, including the stages as follows: making decision on current block and adjacent block corrected for blocking effect; estimating whether current block and adjacent block are coded by means of internal BL mode; and if at least one either current block or adjacent block is coded by means of mode other than internal BL mode, making decision on preset filtration intensity relative to border between current block and adjacent block; and if both current block and adjacent block are coded by means of internal BL mode, making decision on filtration intensity which is lower than that chosen relative to border.EFFECT: development of decision mode blocking effect correction filtration intensity for frame containing block set which provides proper choice of blocking effect correction filter intensity according to that whether certain block to which blocking effect correction filter is applied, uses internal base layer (BL) mode in video coder/ decoder based on layer set.13 cl, 20 dwg

ethod that prevents printing of out of focus pictures // 2338252
FIELD: electric engineering.SUBSTANCE: method includes change of image size in accordance with photocopy size and resolution of printing device, histograms are calculated for absolute values of border images, where border images are produced as a result of high-frequency filtration with convolution kernels of different size, border histogram, logarithm integral is calculated for every histogram, criteria are calculated from array of border histogram logarithm integrals, decision is taken on the basis of criteria about photograph sharpness, user is warned about possibility of printing out of focus picture, if picture as classified as out of focus.EFFECT: detection of low quality, out of focus digital images, and their automatic exclusion from the process of printing with account of preset size of print and resolution of print.6 cl, 4 dwg

ethod and device to enhance quality of video image at low bit rates // 2329536
FIELD: video technology.SUBSTANCE: invention refers to video compression, particularly to the image block compression systems. The method of image processing is suggested, which includes the definition of whether the two image blocks are adjacent or not, and whether the two blocks are subdivided or not. If the two blocks are adjacent, then the filtration of block smoothing at one or more border pixels of the two adjacent blocks occurs if it is defined that both of the adjacent blocks are not subdivided.EFFECT: increase in the block smoothing efficiency with the use of border information.33 cl, 24 dwg

ethod for automatic correction of red-eye effect // 2320011
FIELD: photographic equipment engineering, image processing methods, in particular, methods for automatically correcting red-eye effect.SUBSTANCE: method includes analysis of additional information about an image; creation of at least one array for storing image point marks; for each image point a color mark is recorded into mark array, if the color of point is a typical color for red eyes and is not a typical color for human skin; filtration of one-component image; for each point of image a boundary mark is recorded into array of marks, and also filter number is recorded into array of marks; on basis of array of marks, connected areas of points are determined; for each connected area of points with consideration of neighborhood, computation of fixed row of features; on basis of features, classification of connected areas of points onto red-eye areas and false areas; connection to red-eye connected area of image points neighboring with points of given area and close in color; connection to connected area of red-eye of image points positioned inside external contour of given area; and change of color of points in connected red-eye area.EFFECT: ensured high quality of automatic correction of red-eye effect.10 cl, 8 dwg

ethod for removing noise on an image // 2316816
FIELD: methods for removing noise in an image, possible use for improving quality of image.SUBSTANCE: in accordance to the invention, effect is achieved due to conversion of brightness of image pixels with noise by means of solving the diffusion equation in non-divergent form, which ensures simultaneous suppression of noise and preservation of image edges.EFFECT: simplified noise removal and increased quality of resulting digital image.4 cl, 1 dwg

System and method for correcting dark tones on digital photographs // 2298223
FIELD: digital processing of images, possible use for global and local correction of brightness of digital photographs.SUBSTANCE: system and method for correcting dark tones in digital photographs contain global contrasting module, module for conversion from RGB color system, module for determining dark tone amplification coefficient, bilateral filtration module, dark tone correction module, module for conversion to RGB color system, random-access memory block, displaying device. Global contrasting module is made with possible correction of global image contrast, module for conversion from RGB color system is made with possible conversion of image from RGB color system to three-component color system, one component of which is image brightness, and two others encode color, module for conversion to RGB color system is made with possible conversion from three-component color system, one of components of which is image brightness, and two others encode color, back to RGB color system, module for determining dark tone amplification coefficient is made with possible computation of global image brightness bar graph and can determine dark tone amplification coefficient based on analysis of signs, calculated from global image brightness bar graph, bilateral filtration module is made with possible execution of bilateral filtration of image brightness channel, dark tone correction module is made with possible correction of dark tones in image brightness channel.EFFECT: absence of halo-effect.2 cl, 17 dwg

A way to automatically improve halftone image // 2174710
The invention relates to digital image processing

The optical information carrier // 2018957
The invention relates to automatic control and computer engineering

Device for the aperture correction images // 2015561
The invention relates to automatic control and computer engineering
 
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