area_holesarea_holesAreaHolesAreaHolesarea_holes (算子名称)

名称

area_holesarea_holesAreaHolesAreaHolesarea_holes — Compute the area of holes of regions.

参数签名

描述

The operator area_holesarea_holesAreaHolesAreaHolesAreaHolesarea_holes 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>)SetSystem("neighborhood",<4/8>)SetSystem("neighborhood",<4/8>)set_system("neighborhood",<4/8>) (default: 8-neighborhood).

In the documentation of this chapter (Regions / Features), you can find an image illustrating regions which vary in the area of their holes.

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.

运行信息

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

参数表

例程 (HDevelop)

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

结果

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

可能的前置算子

thresholdthresholdThresholdThresholdThresholdthreshold, regiongrowingregiongrowingRegiongrowingRegiongrowingRegiongrowingregiongrowing, connectionconnectionConnectionConnectionConnectionconnection

参考其它

area_centerarea_centerAreaCenterAreaCenterAreaCenterarea_center, fill_upfill_upFillUpFillUpFillUpfill_up

模块

Foundation