Howtosignalprocessing
- Which method is used to detect the edges of surfaces and objects?
- How do we detect edges of items in a drawing?
Which method is used to detect the edges of surfaces and objects?
The zero-crossing based methods search for zero crossings in a second-order derivative expression computed from the image in order to find edges, usually the zero-crossings of the Laplacian or the zero-crossings of a non-linear differential expression.
How do we detect edges of items in a drawing?
How are Edges Detected? Edges are characterized by sudden changes in pixel intensity. To detect edges, we need to go looking for such changes in the neighboring pixels. Come, let's explore the use of two important edge-detection algorithms available in OpenCV: Sobel Edge Detection and Canny Edge Detection.
