pnot

Performs logical negation of image or graph and complementary of region map.

Synopsis

pnot [-m mask] [im_in|-] [im_out|-]

Description

pnot performs the logical negation of the input.

If input is an image, the negation operator uses the '!' C operator. If an input pixel is greater than 0 then output pixel is 0. If an input pixel is 0 then the output pixel is 1.

   pixel(im_out) = ! pixel(im_in)

For color or multispectral image, the "not" operator is computed separately on each band.

For the graph, the negation operator ! is applied to each node values.

For region map, pnot performs the complementary of the region map im_in. Regions with labels > 0 in im_in become region with label =0 in the im_out and region with label=0 becomes region with label=1. Resulted regions are not more necessarily connected components.

Inputs

im_in: an image, a graph or a region map.

Outputs

im_out: an object of the same type as im_in.

Result

Returns SUCCESS or FAILURE.
For region map, returns the new higher label value (0 or 1).

Examples

Select the background in the tangram image:

  pbinarization 100 1e30 examples/tangram.pan a.pan
  plabeling 8 a.pan b.pan
  pnot b.pan c.pan

C++ prototype

Errc PNot( const Img2duc &im_in, Img2duc &im_out );

Author: Régis Clouard