Patent ID: 8891844

Claim:
A time synchronization calibration method for image taking and coordinate reading, to be implemented in a computer system, the calibration method comprising the steps of: obtaining calibrator coordinates and operation target coordinates of each time point and storing the calibrator coordinates and the operation target coordinates of each said time point into a memory unit; reading an image of each said time point, wherein each said image is output by an X-ray instrument; calculating a similarity index of each said image, wherein a processing unit performs a similarity comparison between each said image and the image of an immediately preceding said time point to produce a said similarity index; outputting an image reading time, wherein when the similarity index of a said image with respect to the image of an immediately preceding said time point is lower than a preset similarity index, a time at which the image having the similarity index lower than the preset similarity index is read is output as the image reading time; calculating an image taking time, wherein the image taking time of the image corresponding to the image reading time is calculated by subtracting a delay time from the image reading time; and outputting an image-coordinate correspondence relationship, wherein a coordinate transformation calculation is performed on the calibrator coordinates and the operation target coordinates of the image taking time to obtain a corresponding coordinate relationship, and the coordinate relationship is related to the image corresponding to the image reading time to obtain the image-coordinate correspondence relationship for output.