METHOD OF ENCODING DIGITIZED IMAGES USING ADAPTIVE ORTHOGONAL CONVERSION Russian patent published in 2018 - IPC H04N19/102 H04N19/134 G06T9/20 

FIELD: physics.

SUBSTANCE: method for encoding a digital image is proposed. According to the method, the digital space of the digital image is converted, the image is divided into blocks with a size of the P×N elements, each block with a size of the P×N elements is adaptively encoded, a bitstream is formed. Herewith the adaptive coding is performed by defining a basis of the orthogonal conversion, and to determine the basis of the orthogonal conversion, the right-hand matrix of the orthogonal conversion with a size of N×N and the left-hand matrix of the orthogonal conversion with a size of the P×P elements are calculated.

EFFECT: increasing the compression ratio without reducing the quality of the restored image at the reception by eliminating the pre-formed wavelet-basis library and forming an orthogonal conversion basis directly from the original image block itself.

2 cl, 10 dwg, 1 tbl