| 摘要 |
PROBLEM TO BE SOLVED: To reduce a computation amount and to parallelly perform plural processings by transforming input image data from a real space to a prescribed transformation space, performing the processing to a coefficient in the transformed transformation space and performing transformation from the transformation space to the original real space. SOLUTION: Inputted color image data are wavelet transformed in a wavelet transformation part 1 for respective color components. After the respective processings corresponding to the transformation in a filter, color matching andγcorrection part 2, a wavelet transformed wavelet coefficient is inversely transformed in a wavelet inverse transformation part 3 and outputted. Also, though the similar processing is possible even when the wavelet transformation is replaced with other orthogonal transformation (DCT or the like), the wavelet transformation is realized by an arithmetic operation and the side effects of block distortion/mosquito noise, etc., are hardly generated. Thus, the computation amount of data is reduced, a high-speed processing is performed and the plural processings are parallelly executed.
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