In a case where aberrations of a camera lens are large, and imaging-center coordinates and reading-center coordinates coincide with each other or are located in proximity to each other within an allowable range, and trimming was not effected or center trimming was not effected, correction parameters...http://www.google.com.tw/patents/US6853400?utm_source=gb-gplus-share專利 US6853400 - System and method for correcting aberration of lenses through which images are projected
