METHOD OF HARDWARE COMPRESSING DIGITAL IMAGE FOR SHOOTING EQUIPMENT OF SCANNING TYPE Russian patent published in 2017 - IPC H04N19/85 H04N19/63 H04N19/124 H04N19/13 

FIELD: physics.

SUBSTANCE: required number of bits is set for compression, the weighting values are set for different frequency ranges, line by line the full frames of the digital image are accumulated and transmitted to the input of the compression module for multilevel conversion of the digital frame signal by repeatedly applying a one-dimensional discrete wavelet-transformation to obtain a set of wavelet-transformation coefficients in different frequency ranges, scalar quantization of wavelet-transformation coefficients is performed, compressed mage is obtained by bitwise arithmetic coding of the quantized coefficients. The use of a one-dimensional discrete wavelet-transformation is performed in two passes, the scalar quantization of the wavelet-transformation coefficients is performed taking into account the quantization coefficients to be determined, the number of bits in the compressed digital frame image is counted, the current frame loss factor is calculated and transmitted for scalar quantization of the next image frame.

EFFECT: increasing the compression speed of the digital image.

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