METHODS AND APPARATUS FOR ENCODING AND DECODING COLOUR HDR IMAGE Russian patent published in 2019 - IPC H04N19/30 

FIELD: physics.

SUBSTANCE: present disclosure generally relates to a method of encoding a colour image of a high dynamic range and at least one first colour image of a standard dynamic range, wherein said method comprises encoding a second colour image of a standard dynamic range obtained from an HDR colour image; determining a colour re-display model assembled from a first piecewise linear function, a three-on-three matrix and a second piecewise linear function, from colours of said second colour image of standard dynamic range and colours of said at least one first colour image of standard dynamic range.

EFFECT: technical result consists in improvement of visual quality of decoded colour image.

31 cl, 15 dwg, 1 tbl