document: Fully automatic algorithm for region of interest location in camera calibration We present an automatic method for region of interest -LRB- ROI -RRB- location in camera calibration used in computer vision inspection . An intelligent ROI location algorithm based on the Radon transform is developed to automate the calibration process . The algorithm remains robust even if the anchor target has a notable rotation angle in the target plane . This method functions well although the anchor target is not carefully positioned . Several improvement methods are studied to avoid the algorithm 's huge time/space consumption problem . The algorithm runs about 100 times faster if these improvement methods are applied . Using this method fully automatic camera calibration is achieved without human interactive ROI specification . Experiments show that this algorithm can help to calibrate the intrinsic parameters of the zoom lens and the camera parameters quickly and automatically
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