HP INCFollow


One of the methods to implement color scanning yet using single receiver/sensor is to illuminate the sensor by red (R) light source, then by green (G) one, then by blue (B) one. Using this method effect longitudinal scanning resolution: it reduced by factor of 3.

This is not the case for monochrome scan: in this case single receiver/sensor illuminated by single light source (white or red or green or blue - or other color) - so there is no effect of resolution reduction.

However, in some cases color scanning is required, but still there are some areas where color scanning is not required - while resolution is very important - so resolution reduction by factor of 3 at these areas - is unacceptable. Moreover: the longitudinal "steps" of RGBRGB... cause difficulties to image processing algorithms, cause color inaccuracy & image color disuniformity.

The suggested method improves the monochrome resolution at areas where no color accuracy required with better spectral illumination and smoothing the RGBRGB "steps" (local disuniformity effects) and also improve color reading accuracy at the other scanned area.

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