anchor.diff:  image::RobertsX.png[title="RobertsX Filter", width="300", height="300"]
   
   
  -===== Y Axis
  +===== Y axis
   
   [source,java]
   .code
  
positive.code: 
  
  
  ===== Edge detection filter
  
  [source,java]
  .code
  
negative.code: image::SobelX.png[title="SobelX Filter", width="300", height="300"]
  
  
  ===== Y axis
  
  [source,java]
  .code
  