Edge Detection on Images

Intro
The following images show the result of applying various edge detection algorithms on this image.

Original Image

1. Prewitt
   
   

   -1 -1 -1
   0 0 0
   1 1 1

   
   
2. Sobel
   
   

   -1 -2 -1
   0 0 0
   1 2 1

   
   
3. Laplacian 1
   
   

   -1 -1 -1
   -1 8 -1
   -1 -1 -1

   
   
4. Laplacian 2
   
   

   0 -1 0
   -1 4 -1
   0 -1 0

   
   
5. Stochastic
   
   

   0.802 0.836 0 -0.836 -0.802
   0.845 0.897 0 -0.897 -0.845
   0.870 1.000 0 -1.000 -0.870
   0.845 0.897 0 -0.897 -0.845
   0.802 0.836 0 -0.836 -0.802