Patent ID: 7394928
Filing Date: 2008-07-01
Classification: G06F

Abstract:
1. An image processing apparatus comprising: DCT processing means for effecting DCT processing of an image which is represented by Y/Cb/Cr color space; quantization means for effecting quantization of data subjected to the DCT processing by said DCT processing means; judging means for judging whether an original image is a moving image or a still image; coefficient selecting means for selecting a number of quantization DCT coefficients to be extracted from among the quantization DCT coefficients subjected to the quantization by said quantization means, in accordance with a judging result by said judging means; and setting means for setting the number of quantization DCT coefficients selected by said coefficient selecting means as an image characteristic amount; wherein the quantization DCT coefficients of Y/Cb/Cr components are re-arranged by zigzag scanning, and, when the original image is a still image, greater than or equal to six quantization DCT coefficients of a Y component and greater than or equal to three quantization DCT coefficients of Cb/Cr components are selected, respectively, from a low frequency component side, and, when the original image is a moving image, six quantization DCT coefficients of the Y component and three quantization DCT coefficients of the Cb/Cr components are selected, respectively, from a low frequency component side.