| 摘要 |
PROBLEM TO BE SOLVED: To compress efficiently and effectively a digital image obtained by an electronic image sensor having a fast pixel value generated from a fast photosite with a predetermined response to radiation and s low pixel value generated from a slow photosite with a slow response to the same irradiation. SOLUTION: In an image compression method, images expanded in a dynamic range with sparsely sampling from a perfect resolution by an imaging element 10 and an A/D converter 14 are supplied, the sparsely sampled images from the perfect resolution by a compressor 312 are separated to fast images having only the fast pixel value and slow images having only the slow pixel value to individually compress the fast images and the slow images. The compressor 312 compresses independently the respective the slow pixel and the fast pixel with separating by a separator for pixel kinds.
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