inner_circleinner_circleInnerCircleInnerCircleinner_circle (算子名称)

名称

inner_circleinner_circleInnerCircleInnerCircleinner_circle — Largest inner circle of a region.

参数签名

描述

The operator inner_circleinner_circleInnerCircleInnerCircleInnerCircleinner_circle determines the largest inner circle of a region. This is the biggest discrete circle region that completely fits into the region. For this circle the center (RowRowRowRowrowrow, ColumnColumnColumnColumncolumncolumn) and the radius (RadiusRadiusRadiusRadiusradiusradius) are calculated. If the position of the circle is ambiguous, the "first possible" position (as far upper left as possible) is returned.

In the documentation of this chapter (Regions / Features), you can find an image illustrating regions with varying inner circles.

The output of the operator is chosen in such a way that it can be used as an input for the operators disp_circledisp_circleDispCircleDispCircleDispCircledisp_circle, gen_circlegen_circleGenCircleGenCircleGenCirclegen_circle, and gen_ellipse_contour_xldgen_ellipse_contour_xldGenEllipseContourXldGenEllipseContourXldGenEllipseContourXldgen_ellipse_contour_xld.

If several regions are passed in 区域区域区域区域区域区域 corresponding tuples are returned as output parameters. In case of an empty input region all parameters have the value 0.0 if no other behavior was set with set_systemset_systemSetSystemSetSystemSetSystemset_system.

注意

If several inner circles are present at a region only the most upper left solution is returned.

运行信息

• Multithreading type: reentrant (runs in parallel with non-exclusive operators).
• Multithreading scope: global (may be called from any thread).
• Automatically parallelized on tuple level.

参数表

read_image(Image,'fabrik')
regiongrowing(Image,Seg,5,5,6,100)
select_shape(Seg,H,'area','and',100,2000)
inner_circle(H,Row,Column,Radius)
gen_circle(Circles,Row,Column,Radius)
dev_set_draw('margin')
dev_display(Circles)

read_image(&Image,"fabrik");
regiongrowing(Image,&Seg,5,5,6.0,100);
select_shape(Seg,&H,"area","and",100.0,2000.0);
T_inner_circle(H,&Row,&Column,&Radius);
T_gen_circle(&Circles,Row,Column,Radius);

read_image(Image,'fabrik')
regiongrowing(Image,Seg,5,5,6,100)
select_shape(Seg,H,'area','and',100,2000)
inner_circle(H,Row,Column,Radius)
gen_circle(Circles,Row,Column,Radius)
dev_set_draw('margin')
dev_display(Circles)

read_image(Image,'fabrik')
regiongrowing(Image,Seg,5,5,6,100)
select_shape(Seg,H,'area','and',100,2000)
inner_circle(H,Row,Column,Radius)
gen_circle(Circles,Row,Column,Radius)
dev_set_draw('margin')
dev_display(Circles)

read_image(Image,'fabrik')
regiongrowing(Image,Seg,5,5,6,100)
select_shape(Seg,H,'area','and',100,2000)
inner_circle(H,Row,Column,Radius)
gen_circle(Circles,Row,Column,Radius)
dev_set_draw('margin')
dev_display(Circles)

Complexity

If F is the area of the region and R is the radius of the inner circle the runtime complexity is O(sqrt(F) * R).

结果

The operator inner_circleinner_circleInnerCircleInnerCircleInnerCircleinner_circle returns the value 2 ( H_MSG_TRUE) if the input is not empty. The behavior in case of empty input (no input regions available) is set via the operator 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>), the behavior in case of empty region is set via set_system('empty_region_result',<Result>)set_system("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)set_system("empty_region_result",<Result>). If necessary an exception is raised.

可能的前置算子

thresholdthresholdThresholdThresholdThresholdthreshold, regiongrowingregiongrowingRegiongrowingRegiongrowingRegiongrowingregiongrowing, connectionconnectionConnectionConnectionConnectionconnection, runlength_featuresrunlength_featuresRunlengthFeaturesRunlengthFeaturesRunlengthFeaturesrunlength_features

可能的后置算子

gen_circlegen_circleGenCircleGenCircleGenCirclegen_circle, disp_circledisp_circleDispCircleDispCircleDispCircledisp_circle

可替代算子

erosion_circleerosion_circleErosionCircleErosionCircleErosionCircleerosion_circle, inner_rectangle1inner_rectangle1InnerRectangle1InnerRectangle1InnerRectangle1inner_rectangle1

参考其它

set_shapeset_shapeSetShapeSetShapeSetShapeset_shape, select_shapeselect_shapeSelectShapeSelectShapeSelectShapeselect_shape, smallest_circlesmallest_circleSmallestCircleSmallestCircleSmallestCirclesmallest_circle

模块

Foundation