Patent Document ID: 20130148886
Application ID: 13710627
Patent Status: 0

Claim One:
1. An image compression apparatus comprising: a binarization unit configured to binarize a multivalued image to generate a binary image; a region specifying unit configured to specify a character region in the binary image binarized by the binarization unit; a first reduction unit configured to determine a first reduction ratio according to an available memory capacity and to reduce the multivalued image by the determined first reduction ratio to generate a first reduced multivalued image; a representative color extraction unit configured to extract a representative color of the character region based on the character region specified by the region specifying unit and the first reduced multivalued image generated by the first reduction unit; a second reduction unit configured to reduce the first reduced multivalued image to generate a second reduced multivalued image; a first compression unit configured to compress the second reduced multivalued image generated by the second reduction unit to generate a first compressed code; a second compression unit configured to compress a partial binary image corresponding to the character region specified by the region specifying unit to generate a second compressed code; and an output unit configured to output compressed data including the first compressed code generated by the first compression unit, the second compressed code generated by the second compression unit, positional information about the character region specified by the region specifying unit, and information about the representative color of the character region extracted by the representative color extraction unit.