Patent ID: 7339618

Claim:
An image chromatism compensation method for adjusting image dispersion distances in all channels of an image captured by an image capturing device to achieve image chromatism compensation, the method comprising the steps of: capturing a reference mark image; obtaining an image dispersion distance between two reference marks in a predetermined channel of the reference image; obtaining an image dispersion distance between the two reference marks in a first other channel of the reference image; obtaining an image dispersion distance between the two reference marks in a second other channel of the reference image; computing a image dispersion calibration ratio, wherein the image dispersion calibration ratio is 1 : (distance between the two reference marks in the predetermined channel) / (distance between the two reference marks of first other channel) : (distance between the two reference marks in the predetermined channel) / (distance between the two reference marks of second other channel), and the distances are measured in units of pixels; and storing the image dispersion calibration ratio.