| 摘要 |
PROBLEM TO BE SOLVED: To output sRGB image with stability also at low cost in a color image scanner with a function to output the sRGB image which is a standard color space. SOLUTION: In a reading apparatus of digital image, a nonvolatile memory to memorize an ideal sRGB value which can be acquired from XYZ value and the like acquired by color-measuring a reference plane placed outside a reading range of an original copy is equipped, the constantly stable sRGB output owing to an acceleration of calibration is provided when the amount of deviation reaches a predetermined value by comparing the reading result of the reference plane through the sRGB image with the ideal sRGB value memorized in the nonvolatile memory.
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