METHOD AND DEVICE FOR ENCODING AN IMAGE OR VIDEO WITH OPTIMIZED COMPRESSION EFFICIENCY PRESERVING IMAGE OR VIDEO FIDELITY

摘要

The present principles relate to a method and device for encoding an image, simultaneously optimizing the compression efficiency and preserving high fidelity of resulting videos by adapting the quantization according to the brightness level. Dark areas and bright quantization are improved according to values of a set of parameters representative of luminance mapping and color correction operations on the image. The principles particularly apply to a single-layer high definition range video distribution system addressing direct backward compatibility.