GEOMETRIC DISTORTION OF LASER SCANNING IMAGING SYSTEM AND ITS CLOSED-LOOP COMPENSATION
激光扫描图象数据采集系统非线性失真的反馈补偿

A compensation system based on closed loop pixel clock generator is developed for correctingthe non-linear distortion caused by laser scanner. Because the frequency of pixel clock which drives ADconverter of data acquisition systern is proportional to the angular velocity of the scanner,we getuniform sampling points at a sacrifice of the sampling moment uniformity.