OpenCV 3.0 Computer Vision with Java

The Laplace and Canny transforms

Another quite useful operator to find edges is the Laplacian transformation. Instead of relying on the first order derivatives, OpenCV's Laplacian transformation implements the discrete operator for the following function:

The matrix can be approximated to the convolution with the following kernel when using finite difference methods and a 3x3 aperture:

The signature for the preceding function is as follows:

Laplacian(Mat source, Mat destination, int ddepth)

While source and destination matrices are simple parameters, ...