| Laplacian | ||
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The Laplacian filter is used for detection of edges in an image. It highlights areas in which intensity changes rapidly producing a picture of all the edges in an image.
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| How it Works | |
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The Laplacian filter is a standard Laplacian of Gaussian convolution. This is a second derivative function designed to measure changes in intensity without being overly sensitive to noise. The function produces a peak at the start of the change in intensity and then at the end of the change. Because the Laplacian of Gaussian produces a fairly wide convolution
for a small radius this filter can become quite computationally
expensive as radius is increased. |
| Example | |
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The following examples show the effect of a Laplacian filter applied with a number of different settings.
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