close_edgesclose_edgesCloseEdgesCloseEdgesclose_edges (算子名称)

名称

close_edgesclose_edgesCloseEdgesCloseEdgesclose_edges — Close edge gaps using the edge amplitude image.

参数签名

描述

close_edgesclose_edgesCloseEdgesCloseEdgesCloseEdgesclose_edges closes gaps in the output of an edge detector, and thus tries to produce complete object contours. This is done by examining the neighbors of each edge point to determine the point with maximum amplitude (i.e., maximum gradient), and adding the point to the edge if its amplitude is larger than the minimum amplitude passed in MinAmplitudeMinAmplitudeMinAmplitudeMinAmplitudeminAmplitudemin_amplitude. This operator expects as input the edges (EdgesEdgesEdgesEdgesedgesedges) and amplitude image (EdgeImageEdgeImageEdgeImageEdgeImageedgeImageedge_image) returned by typical edge operators, such as edges_imageedges_imageEdgesImageEdgesImageEdgesImageedges_image or sobel_ampsobel_ampSobelAmpSobelAmpSobelAmpsobel_amp. close_edgesclose_edgesCloseEdgesCloseEdgesCloseEdgesclose_edges does not take into account the edge directions that may be returned by an edge operator. Thus, in areas where the gradient is almost constant the edges may become rather “wiggly.”

注意

Note that filter operators may return unexpected results if an image with a reduced domain is used as input. Please refer to the chapter 过滤器.

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

例程 (C)

sobel_amp(Image,&EdgeAmp,"sum_abs",5);
threshold(EdgeAmp,&EdgeRegion,40.0,255.0);
skeleton(EdgeRegion,&ThinEdge);
close_edges(ThinEdge,EdgeAmp,&CloseEdges,15);
skeleton(CloseEdges,&ThinCloseEdges);

结果

close_edgesclose_edgesCloseEdgesCloseEdgesCloseEdgesclose_edges returns 2 ( H_MSG_TRUE) if all parameters are correct. If the input is empty the behavior can be set via 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

edges_imageedges_imageEdgesImageEdgesImageEdgesImageedges_image, sobel_ampsobel_ampSobelAmpSobelAmpSobelAmpsobel_amp, thresholdthresholdThresholdThresholdThresholdthreshold, skeletonskeletonSkeletonSkeletonSkeletonskeleton

可能的后置算子

skeletonskeletonSkeletonSkeletonSkeletonskeleton

可替代算子

close_edges_lengthclose_edges_lengthCloseEdgesLengthCloseEdgesLengthCloseEdgesLengthclose_edges_length, dilation1dilation1Dilation1Dilation1Dilation1dilation1, closingclosingClosingClosingClosingclosing

参考其它

gray_skeletongray_skeletonGraySkeletonGraySkeletonGraySkeletongray_skeleton

模块

Foundation

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