Method and device for colour adjustment

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

 



 

Same patents:

FIELD: information technology.

SUBSTANCE: disclosed is an apparatus and a method of compressing video data YUY (or YCrCb) for storage in memory or decompression after obtaining blocks from memory. Compression is performed using a quantiser for compressing video data to the required overall compression coefficient R, even if the input of brightness and colour data into the overall compression differ for each sub-block, each preferably selected in accordance with the texture estimate. Selection is performed for each sub-block to perform either linear or nonlinear quantisation during compression. Compression is performed without using data from blocks obtained outside the compressed block, wherein video data blocks may be obtained and restored in any required order. As an alternative, an encoder directly selects blocks from memory, which are then restored and encoded.

EFFECT: reduced required bus bandwidth or storage size and memory for video data streams.

20 cl, 17 dwg

FIELD: information technology.

SUBSTANCE: result is achieved by obtaining an image having a plurality of colours, obtaining a shift value of light flux of a second colour relative to light flux of a first colour, the shift value being determined by optical characteristics of a lens through which the light flux is transmitted to an image capturing unit, interpolating the signal level of the second colour in aberration coordinates from the signal level of pixels, having a second colour, around aberration coordinates, extracting the high-frequency signal level of the first colour of a target pixel in accordance with the degree of reduction of the high-frequency signal level in the signal level of the second colour in aberration coordinates, outputting, as the signal level of a pixel of second colour in the target pixel, a signal level obtained by adding the signal level extracted at the high-frequency extraction step to the signal level of the pixel of second colour, calculated at the shift correction step.

EFFECT: correcting chromatic aberration of a lens with restoration of high-frequency components lost due correction of colour position shift, for which position shift correction is performed.

9 cl, 11 dwg

FIELD: information technologies.

SUBSTANCE: decoding stage is carried out to decode the first identifying information, which indicates whether signals of appropriate colour components are independently coded, and to decode the second identifying information in the case when the first identifying information indicates that signals of appropriate colour components are coded independently, the second identifying information indicates whether all colour components are intra-coded, besides, in the case when the first identifying information indicates that signals of the appropriate colour components are coded independently, and the second identifying information indicates that all images of appropriate colour components are intra-coded, the decoding stages generates a decoded image, in which performance of deblocking filtration is off at each border between blocks serving as elements of conversion and quantisation.

EFFECT: improved optimality and efficiency of decoding in case when coded signals of a dynamic image do not have a difference in respect of a number of counts between colour components.

15 dwg

FIELD: information technology.

SUBSTANCE: image processing circuit corrects colour in a predetermined colour range so that it is corrected such that it partially includes the reference range of red hue, lying in the centre of the colour range of the constant hue, lying from the achromatic colour which is the colour of the lowest saturation in the extended colour reproduction region, to the red colour having the highest colour saturation in the extended colour reproduction range, but does not include red colour having the highest colour saturation in the extended colour reproduction range. At that moment, the image processing circuit corrects said colour such that its hue is replaced with hue lying close to the yellow colour in the extended colour reproduction range, and hue from the reference range of red hue is replaced with red colour hue in the sRGB standard colour reproduction range, and further, the value by which the hue changes to hue lying close to the yellow colour is less than the colour lying further from the reference range of red hue in the extended colour reproduction range than for the colour lying close to the reference range of red hue in the extended colour reproduction range.

EFFECT: providing a video display device capable of displaying video using a display with a wide colour gamma based on a video signal corresponding to a standard having a narrower colour reproduction range than the range of the display with a wide colour gamma, while solving the problem of hue shift when displaying red colour with average saturation.

3 cl, 9 dwg

FIELD: information technology.

SUBSTANCE: in an image encoding system compression processing is applied to an input image signal, comprising multiple colour components, encoded data obtained after independent encoding processing of the input image signal for each of the colour components, and the parameter that indicates which colour component corresponds to encoded data is multiplexed with the bit stream.

EFFECT: higher encoding efficiency and providing possibility to include data for one image in one access unit, and establish identical time information and single encoding mode for corresponding colour components.

6 cl, 25 dwg

FIELD: information technology.

SUBSTANCE: when controlling a diffused illumination element, the category of data displayed by the unit is identified. Diffused illumination data associated with the identified category are extracted and the extracted diffused illumination data are displayed according to the displayed data. The extracted diffused illumination data can be a diffused illumination script which can determine temporary parts of the diffused illumination data. Diffused illumination data can be associated with a category based on user input. A data subcategory can be identified and diffused illumination data can be modified with additional diffused illumination data associated with the subcategory. Association of the category with diffused illumination data can be edited by the user. Default association of the category with diffused illumination data can be provided.

EFFECT: eliminating the direct link between the diffused illumination effect and context of the displayed video.

18 cl, 3 dwg

FIELD: information technology.

SUBSTANCE: secondary video signal is generated, said signal being composed of signals having values derived via conversion of intermediate values into values lying inside an output range according to a predetermined conversion rule when intermediate brightness values (determined by formulas where Smin is the output value of the lower limit, Xr to Xb are values of RGB signals of the main video signal, k is a constant, and Lr to Lb are intermediate values of RGB brightness), include a value greater than the value of the upper output limit, otherwise a secondary video signal consisting of a signal having an intermediate brightness value is generated.

EFFECT: preventing gradation error when a given video signal shows colour in a region outside the colour range of the video display element, performing signal conversion processing with low arithmetic load.

16 cl, 7 dwg

FIELD: information technology.

SUBSTANCE: scalable video codec converts lower bit depth video data to higher bit depth video data using decoded lower bit depth video data for tone mapping and tone mapping derivation. The conversion can also be used for filtered lower bit depth video data for tone mapping and tone mapping derivation.

EFFECT: high encoding efficiency.

7 cl, 3 dwg

FIELD: physics.

SUBSTANCE: when controlling an ambient illumination element, a host event is detected, a light script associated with the detected event is retrieved and the retrieved light script is rendered in accordance with the detected event. A user may associate the light script with the event and/or an event type which corresponds to the event. A default association of events and/or event types may be provided, although these default associations can be modified by the user. An event type which corresponds to the event can be identified and a light script associated with the identified event type can be rendered in response to the detected event.

EFFECT: reduced viewer fatigue and improved realism and depth of experience.

20 cl, 3 dwg

FIELD: information technology.

SUBSTANCE: image encoder includes the following: a predicted-image generating unit that generates a predicted image in accordance with a plurality of prediction modes indicating the predicted-image generating method; a prediction-mode judging unit that evaluates prediction efficiency of a predicted image output from the predicted-image generating unit to judge a predetermined prediction mode; and an encoding unit that subjects the output signal of the prediction-mode judging unit to variable-length encoding. The prediction-mode judging unit judges, on the basis of a predetermined control signal, which one of a common prediction mode and a separate prediction mode is used for respective colour components forming the input image signal, and multiplexes information on the control signal on a bit stream.

EFFECT: high optimality of encoding the signal of a moving image.

4 cl, 86 dwg

FIELD: physics.

SUBSTANCE: computer implemented method for assisting in colour selection involves associating, depending on a mathematical equation derived from measurements of psycho-physical responses of a certain set of test subjects to a first set of control colours, a colour emotion score with each of a second set of colours that are numerically defined in a colour library; displaying on a visual user interface a combination of at least three colours from the colour library; displaying on the visual user interface the combined colour emotion score for said combination of colours; the combined colour emotion score is calculated using a controller as follows: (a) calculating for each unique colour combination pair of adjacent colours the colour emotion score of a pair of adjacent colours using a first equation depending on the colour emotion score of each colour of the pair of adjacent colours; (b) calculating for each unique colour combination pair of non-adjacent colours the colour emotion score of a pair of non-adjacent colours using a second equation depending on the colour emotion score of each colour of the pair of non-adjacent colours; (c) wherein the combined colour emotion score = 1/n (Σ colour emotion score of the pair of adjacent colours + Σ colour emotion score of the pair of non-adjacent colours), where n is the total number of unique pairs of adjacent and non-adjacent colours of the colour combination.

EFFECT: facilitating colour selection using a controller without the need for the user to select a primary colour.

48 cl, 17 dwg

FIELD: information technologies.

SUBSTANCE: sprite represents images of irregular shape overlaid over background images, preferably online. Generated sprite has specified first multitude of possible values of non-transparent colours of pixels and at least one value of pixel colours identifying transparent colour of pixel. Sprite is generated using initial data, including the first data structure specifying colour image with specified second multitude of possible colours of pixels, and the second data structure specifying non-transparent part of specified sprite. Compliance of colours of the first data structure and possible non-transparent colours of sprite is partial projection of the specified second multitude into the specified first multitude, where augmentation of area of identification of specified partial projection to the specified second multitude is the multitude, capacity of which is considerably lower than capacity of the specified second capacity, besides to identify the value of colours included into the specified first multitude and complying with colour of pixel from the first data structure, the following actions are taken: if pixel of the first data structure has colour that does not belong to the specified area of identification, then value of this pixel is established as equal to colour being one of nearest to initial colour of pixel and included in the specified area of identification; specified partial projection is applied to colour of pixel of the first data structure.

EFFECT: improving sprite generation reliability.

5 cl, 2 dwg

FIELD: information technologies.

SUBSTANCE: player, in which interactive disk is installed, obtains access to server, which provides additional content in the form of audio/video data recorded on interactive disk prior to reproduction of interactive disk, and obtains updated information of additional content from server; addresses to obtained updated information and decides, whether arbitrary file contained in additional content list related to audio/video data has been updated; requests initial file contained in list or updated file, specified in updated information, and obtains requested initial or updated file.

EFFECT: expansion of functional resources.

19 cl, 5 dwg

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

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

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

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

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

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

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

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

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