ENCODING, DECODING AND REPRESENTING HIGH DYNAMIC RANGE IMAGES Russian patent published in 2016 - IPC G06T9/00 H04N1/41 H04N1/46 H04N9/04 

FIELD: image processing devices.

SUBSTANCE: luminance ratio values and residual values in color channels of a color space are generated on an individual pixel basis based on a high dynamic range (HDR) image and a derivative tone-mapped (TM) image that comprises one or more color alterations that would not be recoverable from TM image with a luminance ratio image. TM image with HDR reconstruction data derived from luminance ratio values and color-channel residual values may be outputted in an image file to a downstream device, for example, for decoding, rendering, and/or storing. Image file may be decoded to generate a restored HDR image free of color alterations.

EFFECT: high accuracy of displaying scene of real world.

49 cl, 9 dwg