Patent ID: 6704455
Filing Date: 2004-03-09
Classification: G06T

Abstract:
An image processing system comprising:dividing means for dividing input image data into a plurality of block data, a block expressed by each of the plurality of block data comprising a pixel matrix of the same predetermined size; transform means for transforming each of said plurality of block data using a frequency transform method so as to produce a transform factor; quantizing means, having a plurality of quantization tables, for quantizing the transform factor using a first of said plurality of quantization tables; encoding means for encoding the output of said quantizing means, reverse transform means for restoring image data from the output of said quantizing means; and measuring means for measuring an error between the input image data and the image data restored by said reverse transform means, wherein said quantizing means quantizes the transform factor a second time using a second of said plurality of quantization tables when the error measured by said measuring means exceeds a predetermined threshold value.