| 摘要 |
PROBLEM TO BE SOLVED: To achieve sampling equal to that of a prior art by reducing a capacity of data for image processing through compression and decompression of the data for use. SOLUTION: When an image deformation unit 7 outputs X-coordinates data and Y-coordinates data that are criteria for determining addresses read from an image buffer unit 4 by a raster image generation unit 5 in synchronization with a vertical synchronization signal and a horizontal synchronization signal, the image deformation unit 7 reads data recorded in a lookup table 8 and performs linear interpolation to the read vertex data, thus determining correspondence between a sensor image of the image buffer unit 4 and an output image at a pixel level. In the vertex data of the lookup table 8 used for the determination, a differential value in a horizontal direction of the vertex data, and a differential value in a vertical direction are calculated each, and lookup data compressed by calculating a difference are stored. The stored lookup data are decompressed and used, and a sampling having an interval narrower than before regardless of the same data capacity, is then achieved to improve an appearance quality of an image. COPYRIGHT: (C)2011,JPO&INPIT
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