select_region_pointselect_region_pointSelectRegionPointSelectRegionPointselect_region_point (算子名称)

名称

select_region_pointselect_region_pointSelectRegionPointSelectRegionPointselect_region_point — Choose all regions containing a given pixel.

参数签名

select_region_point(区域 : DestRegions : Row, Column : )

描述

该算子 select_region_pointselect_region_pointSelectRegionPointSelectRegionPointSelectRegionPointselect_region_point selects all regions from 区域区域区域区域区域区域 containing the test pixel (RowRowRowRowrowrow,ColumnColumnColumnColumncolumncolumn), i.e.:

注意

If the regions overlap more than one region might contain the pixel. In this case all these regions are returned. If no region contains the indicated pixel the empty tuple (= no region) is returned.

运行信息

多线程类型:可重入(与非独占操作符并行运行)。
多线程作用域:全局(可以从任何线程调用)。
在元组级别自动并行化。

参数表

区域区域区域区域区域区域 (input_object) region-array → object

Regions to be examined.

DestRegionsDestRegionsDestRegionsDestRegionsdestRegionsdest_regions (output_object) region-array → object

All regions containing the test pixel.

RowRowRowRowrowrow (input_control) point.y → (integer)

Line index of the test pixel.

Default: 100

ColumnColumnColumnColumncolumncolumn (input_control) point.x → (integer)

Column index of the test pixel.

Default: 100

例程 (HDevelop)

read_image(Image,'fabrik')
regiongrowing(Image,Seg,3,3,5,0)
dev_set_color('red')
dev_set_draw('margin')
Button := 1
while (Button == 1)
  get_mbutton(WindowHandle,Row,Column,Button)
  select_region_point(Seg,Single,Row,Column)
  dev_display(Image)
  dev_display(Single)
endwhile

例程 (C)

read_image(&Image,"fabrik");
regiongrowing(Image,&Seg,3,3,5.0,0);
do {
  printf("Select the region with the mouse (End right button \n");
  get_mbutton(WindowHandle,&Row,&Column,&Button);
  select_region_point(Seg,&Single,Row,Column);
  clear(Single);
} while(Button != 4);

例程 (HDevelop)

read_image(Image,'fabrik')
regiongrowing(Image,Seg,3,3,5,0)
dev_set_color('red')
dev_set_draw('margin')
Button := 1
while (Button == 1)
  get_mbutton(WindowHandle,Row,Column,Button)
  select_region_point(Seg,Single,Row,Column)
  dev_display(Image)
  dev_display(Single)
endwhile

例程 (HDevelop)

read_image(Image,'fabrik')
regiongrowing(Image,Seg,3,3,5,0)
dev_set_color('red')
dev_set_draw('margin')
Button := 1
while (Button == 1)
  get_mbutton(WindowHandle,Row,Column,Button)
  select_region_point(Seg,Single,Row,Column)
  dev_display(Image)
  dev_display(Single)
endwhile

例程 (HDevelop)

read_image(Image,'fabrik')
regiongrowing(Image,Seg,3,3,5,0)
dev_set_color('red')
dev_set_draw('margin')
Button := 1
while (Button == 1)
  get_mbutton(WindowHandle,Row,Column,Button)
  select_region_point(Seg,Single,Row,Column)
  dev_display(Image)
  dev_display(Single)
endwhile

Complexity

If F is the area of the region and N is the number of regions, the mean runtime complexity is O(ln(sqrt(F)) * N).

结果

该算子 select_region_pointselect_region_pointSelectRegionPointSelectRegionPointSelectRegionPointselect_region_point 返回值 2 ( H_MSG_TRUE) 如果参数都是正确的。 The behavior in case of empty input (no input regions available) is set via 该算子 set_system('no_object_result',<Result>)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("no_object_result",<Result>)set_system("no_object_result",<Result>). If necessary an exception is raised.

可能的前置算子

thresholdthresholdThresholdThresholdThresholdthreshold, regiongrowingregiongrowingRegiongrowingRegiongrowingRegiongrowingregiongrowing, connectionconnectionConnectionConnectionConnectionconnection

可替代算子

test_region_pointtest_region_pointTestRegionPointTestRegionPointTestRegionPointtest_region_point

参考其它

get_mbuttonget_mbuttonGetMbuttonGetMbuttonGetMbuttonget_mbutton, get_mpositionget_mpositionGetMpositionGetMpositionGetMpositionget_mposition

模块

Foundation

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