sobel - w3toppers.com

Sobel filter kernel of large size

Complete solution for arbitrary Sobel kernel sizes and angles tl;dr: skip down to section ‘Examples’ To add another solution, expanding on this document (it’s not particularly high quality, but it shows some usable graphics and matrices starting at the bottom of page 2). Goal What we’re trying to do is estimate the local gradient of … Read more

Sobel derivative in OpenCV

This code snippet is to demonstrate how to compute Sobel 3×3 derivatives convolving the image with Sobel kernels. You can easily extend to different kernel sizes giving the kernel radius as input to my_sobel, and creating the appropriate kernel. #include <opencv2\opencv.hpp> #include <iostream> using namespace std; using namespace cv; void my_sobel(const Mat1b& src, Mat1s& dst, … Read more