Patent ID: 6201897
Filing Date: 2001-03-13
Classification: H04N

Abstract:
A method for processing an image by a wavelet transform process using filters having a size F in a processor system having memory, comprising:determining a number N of levels into which an image will be transformed, the levels ordered from a highest level to a lowest level;allocating buffers for the N levels in the memory;specifying an image to be acquired, the image having y lines of x pixels each;acquiring the image; andthe transform process recursively performing the following steps while the image is being acquired:(a) requesting at least one line of the image for the highest level;(b) producing transformation results at each level in response to provision of the at least one line to the highest level, the transformation results including, at each level, intermediate results and subband results resulting from the intermediate results;(c) during production of transformation results, storing recently-produced intermediate results in the buffers, while discarding earlier-produced intermediate results from the buffers.