inner_circleinner_circleInnerCircleInnerCircleinner_circle (算子名称)
名称
inner_circleinner_circleInnerCircleInnerCircleinner_circle — Largest inner circle of a region.
参数签名
def inner_circle(区域: HObject) -> Tuple[Sequence[float], Sequence[float], Sequence[float]]
def inner_circle_s(区域: HObject) -> Tuple[float, float, float]
描述
该算子 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 该算子 is chosen in such a way that it can be
used as an input for 该算子s 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
- 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) → objectHRegionHObjectHRegionHobject
Regions to be examined.
RowRowRowRowrowrow (output_control) circle.center.y(-array) → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)
Line index of the center.
ColumnColumnColumnColumncolumncolumn (output_control) circle.center.x(-array) → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)
Column index of the center.
RadiusRadiusRadiusRadiusradiusradius (output_control) circle.radius(-array) → HTupleSequence[float]HTupleHtuple (real) (double) (double) (double)
Radius of the inner circle.
Assertion:
Radius >= 0
例程 (HDevelop)
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)
例程 (C)
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);
例程 (HDevelop)
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)
例程 (HDevelop)
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)
例程 (HDevelop)
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
该算子 inner_circleinner_circleInnerCircleInnerCircleInnerCircleinner_circle 返回值 2 (
H_MSG_TRUE)
if the input is not empty.
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>),
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