Patent ID: 7277484
Filing Date: 2007-10-02
Classification: G06T,H04N

Abstract:
1. An image coding method comprising: (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 in an interpolation region between a region of interest and a background region; (b) determining a quantization parameter of each region constituting one scene according to the result of modeling of image quality distribution, such that the determination for corresponding quantization parameters for each region is region specific based on the modeling of the image quality distribution; (c) varying the quantization parameter in the interpolation region such that values of the quantization parameter in the interpolation region gradually increase between a value of the quantization parameter in the region of interest and a value of the quantization parameter in the background region; (d) quantizing image data in accordance with the quantization parameters; and (e) coding entropy of the quantized image data.