Hough直线块通过检测交叉点处的参考图像的边界线找到图像-The Hough Lines block finds the points of intersection between the reference image boundary lines and the line specified by a (rho, theta) pair. The block outputs one-based [x y] coordinates for the points of intersection. The boundary lines indicate the left and right vertical boundaries and the top and bottom horizontal boundaries of the reference image.



If the line specified by the (rho, theta) pair does not intersect two border lines in the reference image, the block outputs the values, [(0,0), (0,0)]. This output intersection value allows the next block in your model to ignore the points. Generally, the Hough Lines block precedes a block that draws a point or shape at the intersection.