pvolumeselection

Selects regions from volume factor.

Synopsis

pvolumeselection relation threshold [-m mask] [rg_in|-] [rg_out|-]

Description

pvolumeselection selects regions from their volume. The parameter relation specifies the order relation to the threshold value that is used to select or not a region.

The volume is calculated from the number of voxels included in the region and on the boundary.

Parameters

relation is an integer from [-3,3] which specifies the order relation to the threshold value:
- relation = 3: regions with the maximum value.
- relation = 2: regions >= threshold.
- relation = 1: regions > threshold.
- relation = 0: regions = threshold.
- relation = -1: regions < threshold.
- relation = -2: regions <= threshold.
- relation = -3: regions with the minimum value.
threshold is an integer defined in voxel unit.

Inputs

rg_in: a 3D region map.

Outputs

rg_out: a 3D region map.

Result

Returns the number of selected regions.

Examples

Selects regions with a volume = 50 voxels.

   pvolumeselection 0 50 reg1.pan reg2.pan

C++ prototype

Errc PVolumeSelection( const Reg3d &rg_in, Reg2d &rg_out, int relation, Ulong threshold );

Version française

Sélection de régions sur leur valeur de volume.

Author: Régis Clouard