anchor.diff:  == Usage
   [.lead]
   --
  -The way of applaying filters is (on example of salt and pepper filter):
  +The way of applying filters is (on `SaltAndPepperFilter` example):
   
   [source,java]
   .code
  
positive.code: === Gauss filter
  --
  image::lena.png[title="original", width="300", height="200"]
  image::GaussFilter5.png[title="mask 5x5 &#963=1.0", width="300", height="200"]
  image::GaussFilter7.png[title="mask  &#963=4.0", width="300", height="200"]
  --
  === Emboss filter
  --
  
negative.code: image:lena.png[width="300", height="200"]
  image:GrayScaleFilter.png[width="300", height="200"]
  --
  ==== Sepia filter
  --
  image:lena.png[width="300", height="200"]
  image:SepiaFilter.png[width="300", height="200"]
  