Real-time correction of optical distortion with a digital circuit

摘要

Abstract: Optical distortion can be corrected by a digital circuit in the process that the images are grabbed or displayed. The correcting process is in fact the transformation from the distorted image plane to the distortionless image plane. A standard calibrating sample plate is used to get the transformation function. To meet the requirement of real time operating, transformation function is presented as a table form. Therefore the correction is just a course of table-lookuping. The digital circuit has been designed to realize the correction process. And the software is working with the hardware to get the transformation table. Some experiment data are proposed in the paper to show the results of the calibration and analyze the correcting errors.!4