Patent ID: 6501863
Filing Date: 2002-12-31
Classification: G06T

Abstract:
An image coding apparatus of a coding an image, comprising:splitting means which splits an image into a plurality of bands; first selecting means which selects an image of a prescribed band component from images of the plurality of band components obtained by said splitting means; second selecting means which selects any one of the image of the prescribed band component selected by said first selecting means and the original image not split; quadrature transforming means which applies quadrature transformation to the image of the band component or the original image, as selected by said second selecting means; quantizing means which quantizes a quadrature transformation coefficient obtained by said quadrature transforming means; generating means which generates a coded bit stream through variable-length coding of the quantization coefficient obtained by said quadrature transforming means; and control means which calculates the volume of codes of said coded bit stream generated by said generating means, and controls said second selecting means in response to the thus calculated volume of codes.