| 摘要 |
The invention alters the light emission proportion of each of five LEDs for each of a plurality of accumulation cycles in a main scanning direction, in accordance with light emission conditions that are configured in the lighting condition register, causes the emission spectra of the multicolored illumination that composites the light emitted from the five LEDs to approximate three types of color-matching functions that are represented with CIEXYZ or other standard color space, and thus, use a sensor to convert the light that is illuminated by the five LEDs onto an original, and reflected therefrom, into an electrical signal.
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