pvalueclassnumber

Synopsis

Description

pvalueclassnumber counts the number of different used values in the input image im_in.

For image, pvalueclassnumber counts the number of used gray levels including value 0.

For region map, it returns the number of labels. Label 0 is not taken into account.

For graph, it returns the number of different node values including value 0.

Inputs

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

Result

Returns the number of different pixel values in the input image im_in. This value can be get using operator pstatus.

Examples

Returns the number of grayscale used in tangram.pan:

   pvalueclassnumber tangram.pan
   pstatus

See also

C++ prototype

Version française

Comptage du nombre de valeurs différentes dans une image, une carte de régions ou un graphe.