You can use these filters to enhance the image in all directions. These filters enhance all edges that are composed of black-to-white transitions by making them white.
AutoCAD Raster Design toolset uses the following Laplace edge enhancements filters:
- #1 uses the target pixel and its horizontal and vertical neighbors. Diagonally adjacent pixels are ignored.
- #2 uses a uniform kernel with a high weighting on the target pixel.
- #3 uses a uniform kernel with the highest weighting on the target pixel.
- #4 weighs adjacent horizontal and vertical pixels more heavily than diagonally adjacent pixels.