July 2015
Intermediate to advanced
174 pages
3h 45m
English
Content preview from OpenCV Computer Vision with Java
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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, ...
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