Image Geometric Rectification And Stitching Of Multi-CCD Scanner System

Scanner,as an important inputting instruments of digital-image, In the specialized domain such as aerial photo, medical service and so on. Large breadth, high accuracy and high resolution are needed for scanning equipment. For these applications ,The HG large breadth scanner use multi-CCD technology, can get A1 breadth and the high accuracy request. Thus have fine prospect for specialized application.The multi-CCD scanner has certain geometry distortion, for some uncertain factors such as the CCD uniformity and system itself. Stitching image of multi-CCD has the chromatic aberration. These kinds of influence must reduce to the lowest level before scanning application. This article, -according to scanner's work flowchart and the development principle, carried on the analysis to the geometry distortion reason, applied the sub-pixel localization technology in the geometric calibration. Also analysising the joint localization of multi-CCD and CCD chromatic aberration, proposed the corresponding algorithm.