Selective document image data compression technique

摘要: A method of storing information from filled-in form-documents comprises extracting the unique user in foreground document form background. The contrast pixels is enhanced by a gamma correction on an image array, and then color value each pixel enhanced. lying edges are converted to black adjacent white. distance between other array determined, filled-edge created. User two-color format creating first scanned converting all darker than threshold black. All that lighter Then second file generated combined filtered smooth image. may be compressed with Huffman coding table for also decimated create decimated-image which can later interpolated back produce reconstructed using bilinear interpolation kernel.--(235 words)