anchor.diff:  image:lena.png[width="300", height="200"]
   image:GrayScaleFilter.png[width="300", height="200"]
   --
  -=== Sepia filter
  +==== Sepia filter
   --
   image:lena.png[width="300", height="200"]
   image:SepiaFilter.png[width="300", height="200"]
  
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: == Usage
  [.lead]
  --
  The way of applying filters is (on `SaltAndPepperFilter` example):
  
  [source,java]
  .code
  