Chromatic aberration calibrating method for image picker

Abstract

The invention provides pixel displacement curve corresponding to several sensing unit columns in image sensor according to the optical feature of image capturing device. The pixel displacement curve of each pixel in each sensing unit column is determined by the pixel displacement curves. The pixel displacement curves presents chromatic aberration caused by reaction of the optical system of image capturing device to different light wave length.

Description

technical field [0001] The invention relates to a method for correcting chromatic aberration of an image capture device; in particular, a method for correcting chromatic aberration caused by an optical system of the image capture device. Background technique [0002] Traditionally, an image capture device uses an image sensor such as a charge-coupled device (CCD) to receive light projected on a document surface and reflected by it to obtain image data. In this type of image capture device, red light, green light and blue light signals are respectively received by different sensing cells of the charge-coupled device, and then converted into image data according to the amount of received light. However, since the red light, green light and blue light pass through the lens of the image capture device with different refractive indices, the images formed by the red light, green light and blue light respectively cannot overlap on the CCD, resulting in chromatic aberration (chromat...

AI Technical Summary

Problems solved by technology

[0005] The above-mentioned traditional chromatic aberration correction method only corrects the captured image data, but does not consider whether the chromatic aberration phenomenon is caused by the optical system of the image capture device or caused by the color deviation of the original surface

Furthermore, this traditional chromatic aberration correction method does not detect and correct the chromatic aberration of the optical system

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