Automatic detection of calibration grids in time-of-flight images ?
Standard corner-detection methods are susceptible to sampling artifacts. A Hough-based method fits a global model to the chequerboard line pattern. This process less sensitive to low-resolution: each vertex is defined by the intersection of 2 lines. Double-mapping segments the gradient vectors; detection is split into 2 Hough transforms. The method is evaluated over 700 detections and performs better than OpenCV method.
hough transform range imaging time-of-flight sensors camera calibration