pseerosion

Synopsis

Description

pseerosion erodes the points of stronger contrast according to a structuring element.

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

   erosion(p) = MIN(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 ptxt2pan) or from the structuring element generator (see psedesign).

For a binary image, erosion erodes white areas.

For the region maps, erosion adds pixels with label=0 (background) at the points of erosion.

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 (Uchar image).

Outputs

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

Result

Returns SUCCESS or FAILURE.

Examples

• Performs geodesic white Top Hat with small 17x17 square structuring element:

     psedesign 1 8 es.pan
     pseerosion 1 es.pan tangram.pan i1.pan
     pdilationreconstruction 8 i1.pan tangram.pan i2.pan
     pdif tangram.pan i2.pan out.pan
  

See also

C++ prototype