DEVICES AND METHODS FOR CODING AND DECODING IMAGES WITH HDR BASED ON BRIGHTNESS AREAS Russian patent published in 2018 - IPC H04N19/86 

FIELD: physics.

SUBSTANCE: image encoder for encoding scene images with a high dynamic range contains a pixel texture encoding unit to encode colours of the image pixels by the image representation (Im_1) containing N-bit code words; an image analyzing unit to determine and output a value of grey (gTS) of the area differentiator, which is a brightness value that separates lower brightness values of all pixels of the first object in at least one unit of images and higher brightness values of all pixels of the second object in at least one unit of images, and a formatter for joint encoding in the output signal (S (Im_1, MET (gTS)) of the image representation (Im_1) and the value of grey (gTS) of the area differentiator; a brightness defining unit to define the brightness display (TOM) for at least one of the first and the second objects that specifies the display between the brightness values of pixels encoded in the image representation (Im_1) and the brightness values of pixels in the second image representation (IM_RC_HDR).

EFFECT: reducing artefacts.

16 cl, 10 dwg