|Image Processing Toolbox|
Using the Radon Transform to Detect Lines
The Radon transform is closely related to a common computer vision operation known as the Hough transform. You can use the
radon function to implement a form of the Hough transform used to detect straight lines. The steps are:
Figure 8-15: Radon Transform of an Edge Image
In this example, the strongest peak in
R corresponds to and . The line perpendicular to that angle and located at is shown below, superimposed in red on the original image. The Radon transform geometry is shown in black.
Figure 8-16: The Radon Transform Geometry and the Strongest Peak (Red)
Notice that the other strong lines parallel to the red line also appear as peaks at in the transform. Also, the lines perpendicular to this line appear as peaks at .
|Radon Transform||The Inverse Radon Transform|