Patent ID: 6628843
Filing Date: 2003-09-30
Classification: G06T

Abstract:
A method of processing JPEG compressed image data comprising:receiving JPEG compressed image data that represent an input digital image, said JPEG compressed image data including a plurality of DC components; extracting a plurality of said DC components from said JPEG compressed image data, said extracted plurality of said DC components representing a subsampling of said input digital image; inputting at least some of said plurality of extracted DC components to an automated image enhancement system; using said DC components input to said automated image enhancement system to derive at least one of a final correction tone reproduction curve and a sharpness filter for enhancement of said input digital image represented by said JPEG compressed data; and, decompressing said JPEG compressed image data to obtain decompressed image data that represent said input digital image; and, using said at least one of said final tone reproduction curve and said sharpness filter to enhance said decompressed image data.