area_holesarea_holesAreaHolesarea_holesAreaHolesAreaHoles (Operator)

Name

area_holesarea_holesAreaHolesarea_holesAreaHolesAreaHoles — Compute the area of holes of regions.

Signature

Description

The operator area_holesarea_holesAreaHolesarea_holesAreaHolesAreaHoles calculates the area of the holes in the input regions. The area is defined as the number of pixels contained in the holes. If a region has more than one hole the sum of the areas of all holes in this region are returned. The neighborhood type is set via set_system('neighborhood',<4/8>)set_system("neighborhood",<4/8>)SetSystem("neighborhood",<4/8>)set_system("neighborhood",<4/8>)SetSystem("neighborhood",<4/8>)SetSystem("neighborhood",<4/8>) (default: 8-neighborhood).

If more than one region is passed the results are stored in tuples with the index of a value in the tuple corresponding to the index of the input region. In case of an empty region the area has the value 0.

Parallelization

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Processed without parallelization.

Parameters

Example (HDevelop)

read_image(Image,'modules/modules_01')
threshold(Image,Region,50,250)
area_holes(Region,Area)

Result

The operator area_holesarea_holesAreaHolesarea_holesAreaHolesAreaHoles returns 2 (H_MSG_TRUE) if all parameters are correct.

Possible Predecessors

thresholdthresholdThresholdthresholdThresholdThreshold, regiongrowingregiongrowingRegiongrowingregiongrowingRegiongrowingRegiongrowing, connectionconnectionConnectionconnectionConnectionConnection

See also

area_centerarea_centerAreaCenterarea_centerAreaCenterAreaCenter, fill_upfill_upFillUpfill_upFillUpFillUp

Module

Foundation