Device and method of improving perceptual luminance nonlinearity-based image data exchange across different display capabilities

FIELD: information data.

SUBSTANCE: invention relates to image data exchange. Method of recoding reference encoded image data into image data typical for device comprises steps of: determining display of digital code between a set of values of reference digital code and a set of values of digital code typical for device; receiving reference encoded image data, encoded by a set of values of reference digital code, wherein brightness value in reference encoded image data are based on a set of values of reference digital code, and a set of values of reference digital code is based on maximum contrast sensitivity of human vision, adapted to specific levels of illumination; decoding based on displaying digital code reference encoded image data, encoded by a set of values of reference digital code, into image data, typical for device, encoded by a set of digital codes typical for device.

EFFECT: technical result is displaying reference encoded data with fewer errors.

23 cl, 16 dwg, 4 tbl

 



 

Same patents:

FIELD: physics.

SUBSTANCE: loop filter 6 includes a region classification unit 12 for extracting an estimate value of each of the regions which make up a local decoded image in order to classify each of the regions into a class belonging to the region, according to the estimate value, and a unit 13 for forming and processing a filter for each class belonging to one or more regions from the regions which make up the local decoded image, forming a Wiener filter which minimises the error arising between the input image and the local decoded image in each of the one or more regions belonging to a class, in order to compensate for the distortion on the one or more regions using the Wiener filter.

EFFECT: high image quality.

3 cl, 18 dwg

FIELD: physics, video.

SUBSTANCE: invention relates to controlling filtering and particularly to controlling deblocking filtering on block boundaries in a video frame. A block-specific filter decision value is calculated for a pixel block in a video frame. If the block-specific filter decision value is below a block-specific threshold, each line or column in the block is individually processed in order to select between a strong and a weak deblocking filter. A respective line-specific filter decision value is thereby calculated for each row or column in the block and compared to a line-specific threshold. If the line-specific filter decision value calculated for a row or column is below the line-specific threshold a strong deblocking filter is selected for the row or column, otherwise a weak deblocking filter is instead selected to combat any blocking artefacts.

EFFECT: high efficiency of deblocking filtering by eliminating or reducing blocking artfacts.

11 cl, 11 dwg

FIELD: radio engineering, communication.

SUBSTANCE: device contains a receiver receiving and syntactically analyzing a bit flow of a coded image; a processor forming a coding unit which is included into a maximum coding block which has hierarchical structure by means of use of the information which indicates this hierarchical structure, syntactically analyzed from the accepted bit flow and forms one sub-block for prediction of a coding block from the coding block, by means of use of information on blocks of a prediction of the named coding block, an image recovery decoder.

EFFECT: higher efficiency of decoding of high-resolution images by determining the depth of the coding unit and the operating mode of the encoding tool according to data characteristics of the image.

5 cl, 8 tbl, 23 dwg

FIELD: information technology.

SUBSTANCE: in the method, after using a modified LBP technique, calculation of LBP code values and search for equivalent LBP code values are performed in rank and domain regions, formed by the same number of pixels located on a circle, where the radius of the circle of the domain region is greater than the radius of the circle of the rank region; the number of pixels, the radius of the circle and the coordinates of the position of the centre pixel for the rank and domain regions are stored.

EFFECT: faster encoding through selection of image characteristics which describe the domain and rank regions.

4 dwg

FIELD: physics.

SUBSTANCE: adaptation is performed by rearranging fragments of discrete cosine transform (DCT) coefficients obtained after two-dimensional DCT on the time axis and subsequent one-dimensional DCT such that the total number of non-zero transform coefficients after three-dimensional DCT is less than the number of non-zero DCT coefficients obtained after three-dimensional DCT without rearranging two-dimensional DCT fragments. In the disclosed method, after forming a domain measuring n×n×n pixels, DCT coefficients are calculated on spatial coordinates x and y for each fragment of the domain. The fragments are then rearranged in the form of a rearrangement vector and a time DCT operation is performed. The DCT coefficients are sampled, encoded and transmitted over a communication channel with the rearrangement vector. At reception, said procedures are performed in reverse order and the original video stream is restored.

EFFECT: high degree of compression of video data with a given image reconstruction error at reception owing to adaptation to variation of static properties of images.

3 cl, 9 dwg

FIELD: information technologies.

SUBSTANCE: method of coding of video data is offered which comprises the obtaining from the coded stream of bits of one or more units of network abstraction level (NAL) for each component of view from a set of components of view of the coded video data where each component of view from the set of components of view corresponds to the common temporary location and where one or more NAL units encapsulate at least a part of the coded video data for the respective components of view and comprise an information specifying the sequence of decoding of the respective components of view. The method also comprises the received information separate from NAL units specifying the relations between the view identifiers for these views and sequence of decoding of components of view. One or more NAL units also comprise the information specifying, whether the first view component of the first view as the reference for prediction between the views of the second component of view for the second different view is used.

EFFECT: coding efficiency improvement.

68 cl, 18 tbl, 12 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to computer engineering. A method of coding video data comprises maintaining a plurality of context models for entropy coding transform coefficients of the video data, wherein the plurality of context models includes one or more context models that are each used for a different transform unit size and at least one joint context model used for two or more transform unit sizes; selecting the joint context model shared by a first transform unit and a second transform unit; selecting contexts for the transform coefficients associated with one of the first transform unit or the second transform unit according to the joint context model; and entropy coding the transform coefficients of said one of the transform units using context adaptive binary arithmetic coding (CABAC) based on the selected contexts.

EFFECT: reduced amount of memory needed to store contexts and probabilities on video coders and decoders.

34 cl, 9 dwg

FIELD: physics, video.

SUBSTANCE: invention relates to image processing means. The method includes creating a plurality of frames of a picture and related prediction reference frames; for each frame and related prediction reference frame, calculating the intensity value and the colour value in a first colour domain; for each frame and related prediction reference frame, calculating weighted prediction gains; if said gains are non-negative, determining that a global transition with zero offset is occurs in a second colour domain; and if not all of said gains are non-negative, determining that a global transition with gradual change in illumination does not occur.

EFFECT: high efficiency of an image display means when encoding and processing video.

28 cl, 16 dwg

FIELD: physics, video.

SUBSTANCE: invention relates to the field of digital signal processing and, in particular, to the field of video signal compression using the movement compensation. The coding method includes the obtaining of target number of movement information predictors to be used for the coded image section and generation of the set of movement information predictors using the obtained target quantity. The set is generated by means of: obtaining of the first set of movement information predictors, each of which is connected with the image section having the pre-set spatial and/or time ratio with the coded image section; modifications of the first set of movement information predictors by removal of the duplicated movement information predictors for obtaining of the reduced set of movement information predictors containing the first number of movement information predictors, and each movement information predictor from the reduced set differs from any other movement information predictor from the reduced set; comparisons of the first number of movement information predictors with the target quantity obtained, and if the first quantity is less than the target quantity, obtaining of the additional movement information predictor and its addition to the reduced set of movement information predictors.

EFFECT: decrease of spatial and time redundancies in video flows.

26 cl, 8 dwg

FIELD: physics, video.

SUBSTANCE: invention relates to a broadcasting system for transmitting a digital television program, particularly a transmission device and a transmission method, in which content which meets needs can be acquired. A server generates a script PDI-S for obtaining a user side PDI-A representative of an answer of a user to a question about user preferences; generates launch information for executing the PDI-A; and transmits the launch information and PDI-S in response to the delivery of broadcast content, and transmits to the client in response to the delivery of reference content a provider side PDI-A representative of an answer set by a provider to the question. The client executes the PDI-S based on detection of launch information and carries out matching between the user side PDI-A and the provider side PDI-A to determine acquisition of reference content delivered by the server.

EFFECT: facilitating delivery of content to a client which satisfies the needs thereof at that time.

10 cl, 48 dwg

FIELD: physics.

SUBSTANCE: method of decoding an image comprises steps of: determining hierarchically structured encoding units for decoding an image, a prediction unit and a transformation unit; obtaining transformation coefficients from a bitstream through analysis and restoring encoded data of at least one prediction unit by performing entropy decoding, inverse quantisation and inverse transformation of the transformation coefficients obtained by analysis; performing intra-prediction or mutual prediction of the restored encoded data and restoring the encoded video.

EFFECT: high efficiency of compressing, encoding and decoding images.

4 cl, 18 dwg

FIELD: information technology.

SUBSTANCE: method for textual information recognition and its integrity evaluation in Internet electronic documents an electronic document is split into areas presumptively containing text paragraphs and lines. Herewith, document splitting is performed up to obtaining the areas containing continuous logically bracketed text of the largest size. Redundant and surplus information it deleted. Symbol encoding validity is analysed by means of the analysis whether letters belong to the alphabet or not and whether text words belong to the vocabulary or not, taking into account the given language. Statistical characteristics of word classes and their forms are calculated. From the obtained values of statistical characteristics a working vocabulary attribute vector is generated, which is converted into the main components vector using componential analysis procedures and classified using preliminarily learned classifiers. Textual information integrity is evaluated based on a voting method of decision making.

EFFECT: higher productivity of an electronic documents contensive processing system and increase in the analysed data sources number.

5 dwg

FIELD: measurement equipment.

SUBSTANCE: invention relates to visualisation systems of medical data. The invention proposes a method for shaping a medical image of an object using a medical visualisation device containing a detector. The method involves a step, at which the detector is offset during collection of visualisation data, starting from the first offset position, in which the detector is offset from the centre of rotation and covers approximately the first half of the object width so that the detector can be located in the second offset position at the end of collection of data; with that, the second offset position differs from the first offset position. When in the second offset position, the detector is offset from the centre of rotation and covers mainly the rest half of the object width, which was not covered by the detector in the first offset position. Further, according to the method, visualisation data is collected by means of the detector and reconstructed to obtain the reconstructed object image.

EFFECT: improvement of accurate reconstruction of an image of the whole visualised object due to reconstruction of the object image obtained by collection of visualisation data from the detector offset from the centre of rotation.

8 cl, 22 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention describes devices and methods of encoding coefficients associated with a block of video data. In one example, the method may comprise steps of selecting a scanning order for the coefficients based on an intra-frame coding mode used to predict the block of video data and a transform block size used in transforming the block of video data, and generating a syntax element to transmit the selected scanning order for the block of video data.

EFFECT: high accuracy of encoding data.

39 cl, 18 dwg

FIELD: physics.

SUBSTANCE: human tracking device comprises a means of retrieving information from a region occupied by a person; a means of determining an accompanying person for identifying a person accompanying the tracked person among people included in the information about the region occupied by the person; a means of selecting a characteristic person having a characteristic feature and a means of tracking the person for calculating the result of tracking the characteristic person.

EFFECT: high accuracy of tracking a target person even when the tracked person has few distinctive features.

10 cl, 9 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to digital imaging devices and particularly to systems and a method of processing image data obtained using the image sensor of a digital imaging device. An image signal processing system includes a pixel final processing unit, a pixel preprocessing unit and a pixel processing conveyor. The final processing unit receives pixel data of image brightness/chrominance after processing by one of the preprocessing unit and processing conveyor. The final processing unit is configured to apply a facial detection operation, local tone mapping, brightness, contrast and colour control, as well as scaling. The final processing unit also includes a final statistics processing unit which collects frequency statistics. The frequency statistics are provided to an encoder and used to determine sampling parameters to be applied to an image frame.

EFFECT: improved outward appearance of an image, achieved by increasing definition of the image without noise or artefacts.

20 cl, 142 dwg, 5 tbl

FIELD: physics.

SUBSTANCE: method of forming barcode on facial images includes performing image correction on size and rotation, calculating distance between two oppositely lying windows having the same width and length, equal to the width of the initial image, synchronously moving on the facial image win the vertical direction from top to bottom with a step ≥1 from the "hair/forehead" boundary to the lower boundary of the nose area, finding the maximum value from the obtained differential brightness gradients, dividing the differential brightness gradients by the maximum value, performing sampling with averaging of the obtained values, quantisation of the sampled values in the range of decimal numbers from 0 to 9, forming from the obtained decimal code a standard barcode of the image.

EFFECT: high stability of encoding facial images in conditions of changing parameters thereof and improved universality thereof owing to formation of standard barcodes.

2 cl, 8 dwg

FIELD: physics.

SUBSTANCE: disclosed is an apparatus for determining outlines of objects on an image. The apparatus comprises an image element sensor and the following units for: generating threshold values of speed and acceleration of change in intensity of the image elements, creating an eight-connected neighbourhood of the image elements, successive selection of triads in the eight-connected neighbourhood of an image element, memory for said triads, differentiating triads and a decision unit. The unit for generating threshold values of speed and acceleration of change in intensity of the image elements is connected to the output of the image element sensor. The unit for creating an eight-connected neighbourhood of the image elements is connected to the output of the unit for generating image elements and is connected to series-connected unit for successive selection of triads in the eight-connected neighbourhood of an image element, memory unit for triads of the eight-connected neighbourhood of an image element, triad differentiation unit and decision unit.

EFFECT: high noise-immunity of recognising an image outline by estimating the speed and acceleration of change of colour intensity in the eight-connected neighbourhood of an image element.

7 dwg

FIELD: physics.

SUBSTANCE: automatic sketch generation method includes performing smoothing an original colour image; calculating the difference between the filtered image and the original colour image; calculating a negative of the obtained difference; calculating the sum of the original colour image with itself; calculating half the sum of the result and the negative of the difference between the filtered image and the original colour image; converting the obtained image into a halftone image of the original sketch; presentation thereof in matrix form; forming, based on the original sketch, a sequence of new sketches, for each of which three parameters of the change of face on the original sketch are generated, and a procedure for changing the matrix based on said parameters.

EFFECT: faster formation of an original sketch based on an original image and enabling automatic generation of the required sequence of new sketches for finished sketches.

2 cl, 7 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to investigating the structure of porous bodies using optical and computer engineering means. The method is based on obtaining a series of comparable digital images of the surface of the investigated material, captured with illumination from different sides, and subsequent processing on a computer using a special algorithm. Investigation of the structural state of the polished surface of the article is performed in reflected light on a special-purpose device, which enables to obtain the comparable images for different illumination parameters.

EFFECT: providing high quality of images of boundaries of objects with low resource and power consumption.

2 cl, 5 dwg

FIELD: coding elementary-wave data by means of null tree.

SUBSTANCE: proposed method includes generation of elementary-wave ratios pointing to image. In the process bits of each elementary-wave ratio are associated with different bit places so that each place is associated with one of bits of each elementary-wave ratio and associated bits are coded with respect to each place of bits to point to null tree roots. Each place of bits is also associated only with one of bits of each elementary-wave ratio. Computer system 100 for coding elementary-wave ratios by means of null tree has processor 112 and memory 118 saving program that enables processor 112 to generate elementary-wave ratios pointing to image. Processor 112 functions to code bits of each place to point to null tree roots associated with place of bits.

EFFECT: enhanced data compression speed.

18 cl, 7 dwg

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