Moreover, discontinuity appears if the wood is not plane and has some splinter, and a false badly stapled nail is detected. In consequence, since this image acquisition system is complex and the classifier ratio is poor, this scheme is discarded, and a new one where ANN is used is ...
correct. In this case, a straight line is broken, as it is shown in the ROI of the image. This means that the nail is badly stapled. The left-down corner shows an example of bad detection with the criteria of a broken straight line. In this case, a splinter broke the straight line...