psedilation

Synopsis

Description

psedilation dilates the points of stronger contrast according to a structuring element.

Dilation corresponds to the operation: replace the central pixel p by the maximum of its neighbors where the neighbors are specified by the structuring element.

   dilation(p) = MAX(neighbors(p)). 

The structuring element is given in the input image im_se. It is a bytes image (Uchar) of the size of the structuring element. This image can be built from a textual file (see pxt2pan) or from the structuring element generator (see pedesign).

For a binary image, dilation dilates white areas.

For the region maps, dilation dilates only regions that touch the background and region with the higher label are privileged.

For the color images, the lexicographic order is used: initially by using band X, in the event of equality by using the band Y then band Z.

Parameters

• size specifies the number of iterations.

Inputs

• im_in: an image or a region map.
• im_se: an image of bytes.

Outputs

• im_out: an image (or a region map) of the same type as im_in.

Result

Returns SUCCESS or FAILURE.

Examples

Performs black Top Hat with small 17x17 square structuring element:

 
   psedesign 1 8 es.pan
   pinverse tangram.pan i0.pan
   psedilation 1 es.pan i0.pan i1.pan
   perosionreconstruction 8 i1.pan i0.pan i2.pan
   pdif i0.pan i2.pan out.pan

See also

C++ prototype