hough_circle_transhough_circle_transHoughCircleTranshough_circle_transHoughCircleTransHoughCircleTrans (Operator)

Name

hough_circle_transhough_circle_transHoughCircleTranshough_circle_transHoughCircleTransHoughCircleTrans — Return the Hough-Transform for circles with a given radius.

Signature

Description

The operator hough_circle_transhough_circle_transHoughCircleTranshough_circle_transHoughCircleTransHoughCircleTrans calculates the Hough transform for circles with a certain RadiusRadiusRadiusRadiusRadiusradius in the regions passed by RegionRegionRegionRegionRegionregion. Hereby the centres 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 centre in the output image (HoughImageHoughImageHoughImageHoughImageHoughImagehoughImage). The circles' centres in the image space can be deduced from the coordinates of these maximums by subtracting the RadiusRadiusRadiusRadiusRadiusradius. If more than one radius is transmitted, all Hough images will be shifted according to the maximal radius.

Parallelization

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

Parameters

Result

The operator hough_circle_transhough_circle_transHoughCircleTranshough_circle_transHoughCircleTransHoughCircleTrans 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>)set_system("no_object_result",<Result>)SetSystem("no_object_result",<Result>)SetSystem("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>)set_system("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>)SetSystem("empty_region_result",<Result>). If necessary an exception is raised.

Module

Foundation