psub

Synopsis

Description

psub computes the difference between the two inputs im_in1 and im_in2.

If im_in1 and im_in2 are images then the new image im_out is built with the difference between each pixel:

pixel(im_out) = pixel(im_in1) - pixel(im_in2);

The two inputs must be of the same type.

The output type im_out depends on input type:

• Long if inputs are Uchar images.
• Long if inputs are Long images.
• Float if inputs are Float images.

For color or multispectral image, the difference is computed separately on each band.

If im_in1 and im_in2 are graphs then the new graph im_out is built with the difference between each node values.

If im_in1 and im_in2 are region maps pdif computes the symmetrical difference between region maps.

Inputs

• im_in1: an image, a graph or a region map.
• im_in2: an image, a graph or a region map.

Outputs

• im_out: an image, a graph or a region map.

Result

Returns SUCCESS or FAILURE.

For region map, returns the new higher label value.

Examples

   psub a.pan b.pan c.pan

See also

C++ prototype

Version française

Soustraction d'images ou de graphes et différence non symétrique entre cartes de régions.