Patent ID: 8284450

Claim:
A method for compensating tones for performing streak compensation on a compressed digital image data, comprising: generating a compressed digital image from an input digital image data using a wavelet-based compression method; recovering a low resolution version of the input digital image data from the compressed digital image data by partially decompressing the compressed digital image; applying spatially varying compensating tone reproduction curves (TRC) to the low resolution version of the input digital image data to generate a streak compensated low resolution image; subsequently decompressing all of the compensated pixel arrays to produce decompressed compensated image data; wherein the partial decompression utilizes reversed multiple wavelet decomposition steps, and a number of reversed decomposition steps yields a low resolution image at the resolution of a desired streak compensation; wherein the number of reversed decomposition steps is based on the spatial resolution of the available TRCs; and, wherein the number of reversed steps combines the compressed digital image data from lowest frequency wavelet sub bands to form the partially decompressed compressed digital image performing recompression to the streak compensated low resolution image and combining the recompressed streak compensated low resolution image with remaining sub-bands to form a streak compensated compressed digital image.