Abstract: A time synchronization calibration method and system for image taking and coordinate reading and a delay time calculation method thereof are disclosed. The time synchronization calibration method is as follows. Firstly, every time point, a calibrator coordinate, an operation target coordinate and an image thereof are obtained. The image similarity index of every image and the image of previous time point thereof is calculated. When the image similarity index is lower than a preset similarity index, a reading time of the image is output followed with calculating the difference of the reading time and a time delay to obtain a taking time of the image. Finally, calculating the coordinate transformation of the calibrator coordinate and the operation target coordinate, and corresponding it to the image to output an image-coordinate correspondence relation. The time delay can be obtained correctly with only one test, and provided for the consequent synchronization calibration.

Abstract: A time synchronization calibration method and system for image taking and coordinate reading and a delay time calculation method thereof are disclosed. The time synchronization calibration method is as follows. Firstly, every time point, a calibrator coordinate, an operation target coordinate and an image thereof are obtained. The image similarity index of every image and the image of previous time point thereof is calculated. When the image similarity index is lower than a preset similarity index, a reading time of the image is output followed with calculating the difference of the reading time and a time delay to obtain a taking time of the image. Finally, calculating the coordinate transformation of the calibrator coordinate and the operation target coordinate, and corresponding it to the image to output an image-coordinate correspondence relation. The time delay can be obtained correctly with only one test, and provided for the consequent synchronization calibration.