Patent ID: 7149350

Claim:
An image compression apparatus comprising: a color region judging section for judging the color region of the color image signal given and outputting the judgment information as the judgment result; a switch section which chooses one parameter out of a plurality of compression parameters based on the judging information supplied from the color region judging section; a compressing section which compresses color image signals based on the compression parameters chosen by the switch section; a color transforming section which transforms color image signals into a color signal which is a chrominance signal, and supplies the color signal to the color region judging section and the compressing section; and an adder which adds the judgment information supplied from the color region judging section to the compressed color image signal outputted from the compressing section, wherein the color region judging section judges the color region using the correlation of chrominance signal, wherein the compressing section includes an encoder to which the color image signal compressed corresponding to the compression parameters is supplied from the compressing section and which codes the color image signal, wherein the encoder has coding information for each color region judged by the color region judging section.