IMAGE PROCESSING APPARATUS AND METHOD

An image processing apparatus comprises a) an input device for inputting color image data which is compression-encoded in a color difference system color space, b) a decoder for decoding the color image data input by the input device, c) a processor for executing correction processing to luminance component data of the color image data decoded by the decoder, and d) an encoder for encoding both the luminance component data processed by the processor, and color difference component data of the color image data output from the decoder. According to another embodiment of the invention, an image processing apparatus is provided which comprises a) an input device for inputting color image data which is compression-encoded in a color difference system color space, b) a decoder for decoding the color image data input by the input device, c) a processor for executing correction processing to luminance component data of the color image data decoded by the decoder, and d) a converter for performing a color space conversion on the basis of the luminance component data processed by the processor, and color difference component data of the color image data output from the decoder.