psubsampling

Sub-sampling of an image.

Synopsis

psubsampling factor [im_in|-] [im_out|-]

Description

The operator psubsampling builds a new image with a subsampled version of the input image. Subsampling consists in spliting the input image into tiles of size factor x factor and setting all the pixels in each tile with the mean value of the tile.

Parameters

factor is a positive integer that specifies the size of tiles.

Inputs

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

Outputs

im_out: an image of the same type as the input image.

Result

Returns SUCCESS or FAILURE.

Examples

Sub-sampling of a factor 2:
```
   psubsampling 2 tangram.pan a.pan
```

C++ prototype

Errc PSubsampling( const Img2duc &im_in, Img2duc &im_out, int factor );

Author: Régis Clouard