===== Linear filters =====

**Linear Filters** are filters described by [[http://en.wikipedia.org/wiki/Linear_map|linear operators]], i.e. operators which satisfy linearity requirements:

//F(x+y) = F(x) + F(y)// и //F(Const*x) = Const* F(x)//.


Besides [[http://en.wikipedia.org/wiki/Affine_transformation|Affine transformations]] there are three linear filters in the program:
  * [[градиент|Gradient filter]]
  * [[фильтр_лапласа|Laplace filter]]
  * [[фильтр_гаусса|Gauss filter]]