===== Laplace filter =====

Discrete Laplace operator is an analog of the [[http://en.wikipedia.org/wiki/Laplace_operator|continuous Laplace operator]]. It is given by the divergence of the [[градиент|gradient]] of a function. As well as [[градиент|gradient filter]], Laplace filter emphasizes the edges in image.

{{:processing:lena_1.jpg|}}   {{:processing:lena_3.jpg|}}

Laplace filter can be called up from menu [[меню_математика|Mathematics]] -> [[линейные_фильтры|Linear filters]], The filter uses the following matrix:

{{:processing:laplas_1.jpg|}}.