IMAGE CODING AND DECODING METHOD AND APPARATUS CONSIDERING HUMAN VISUAL CHARACTERISTICS

摘要

An image coding method and apparatus considering human visual characteristics are provided. The image coding method comprises (a) modeling image quality distribution of an input image in units of scenes such that the quality of an image input in units of scenes is gradually lowered from a region of interest to a background region, (b) determining a quantization parameter of each region constituting one scene according to the result of modeling of image quality distribution, (c) quantizing image data in accordance with the quantization parameter, and (d) coding entropy of the quantized image data.

主权项

1. An image decoding method comprising:
receiving a bitstream; obtaining a first quantization parameter for a first plurality of blocks from the bitstream, where the first plurality of blocks are not located on a boundary of a region; calculating a second quantization parameter for a second plurality of blocks in a predetermined manner, where the second plurality of blocks are located on the boundary of the region; and inverse-quantizing the first plurality of blocks using the first quantization parameter and the second plurality of blocks using the second quantization parameter, respectively.