pareaopening

Synopsis

Description

The operator pareaopening removes clear objects whose area in number of pixels is less than the specified area.

The algorithm presented in a naive way consists in:

1. thresholding image at each gray level, and
2. removing white regions whose area is less than the specified area.
3. The final result is the addition of the result at each level.

Parameters

• connexity specifies the relationship between a pixel and its neighbors. It is an integer from: 4 or 8 for 2D or 6 or 26 for 3D.
• area specifies the maximum area size, in number of pixels to be removed.

Inputs

• im_in: an image.

Outputs

• im_out: an image of the same type as im_in.

Result

Returns SUCCESS or FAILURE.

Examples

• Open areas of the tangram pieces lower than 500 pixels:

   
     pbinarization 0 90 examples/tangram.pan i1.pan 
     pareaopening 8 500 i1.pan out.pan
  

See also

C++ prototype