Learning immediately: https://edu.csdn.net/course/play/26281/327082?utm_source=blogtoedu
Hough transform rules used to detect the shape of straight lines, circles and so on.
Used to address a corresponding point in the image which a straight line.
Method a: search violence, arbitrary two points in the image of the n points are calculated assuming a curve (a total of n * (n-1) / 2 bars), then set a distance threshold, enumerate all n points Suppose all distances from the curve is within a threshold range (n * n * (n-1) / 2). Huge amount of calculation, it is difficult to set the threshold value.
Method Two: Hough transform: the original coordinates (x, y) conversion to the parameter space, said the further use of voting mechanisms to address robustness issues.
Any point (x0, y0) corresponding to the parameter constitutes a curve:
