hough_circle_trans — 返回具有给定半径的圆的霍夫变换。
hough_circle_trans(Region : HoughImage : Radius : )
算子 hough_circle_trans calculates the Hough transform for circles
with a certain Radius in the regions passed by Region. Hereby the
centers of all possible circles in the parameter space (the Hough or accumulator space
respectively) will be accumulated for each point in the image space.
Circle hypotheses supported by many points in the input region thereby
generate a maximum in the area showing the circle's center in the output image
(HoughImage). The circles' centers in the image space can be deduced from the
coordinates of these maximums by subtracting the Radius. If more than one radius is
transmitted, all Hough images will be shifted according to the maximal radius.
Region (输入对象) region → object
Binary edge image in which the circles are to be detected.
HoughImage (输出对象) image(-array) → object (int2)
Hough transform for circles with a given radius.
元素数量： HoughImage == Radius
Radius (输入控制) integer(-array) → (integer)
Radius of the circle to be searched in the image.
元素数量： 1 <= Radius <= 500
默认值： 12
值范围：
3
≤
Radius
(lin)
最小增量： 1
建议增量： 1
算子 hough_circle_trans 在输入不为空时返回值 2 ( H_MSG_TRUE )。当输入为空（无可用输入区域）时，可设置行为通过算子 set_system('no_object_result',<Result>),
the behavior in case of empty region is set via
set_system('empty_region_result',<Result>)。如有必要，则抛出异常。
基础