Well log curve images skew correction based on improved generalized Hough transform
Luo Dai-sheng · Journal of Chengdu University of Information Technology · 2008
In the field of the image processing and computer vision the Generalized Hough transform can examine various types of curves and the calculation amount and memory in demand is relatively less than the original Hough transform.For the big images as the well log curve image the calculation speed based on the generalized Hough transform still seems slow.An improved generalized Hough transform is presented,which can checks and measures the image angle at a fast speed by setting reference points on the shape edge's ending point.The calculation speed increases by more than 10 times than the generalized Hough transform.In the view of the image skew correction an improved image athwart rotation is proposed.It can solve the problems of the holes and sawtooth.Compared with the previous methods this new arithmetic is much faster,more accurate and requires smaller memory.Besides it almost saves half of the computation time.