robertsrobertsRobertsRobertsroberts (算子名称)

名称

robertsrobertsRobertsRobertsroberts — Detect edges using the Roberts filter.

参数签名

描述

robertsrobertsRobertsRobertsRobertsroberts calculates the first derivative of an image and is used as an edge operator. If the following mask describes a part of the image, A B C D the different filter types are defined as follows: 'roberts_max' max(| A - D |,| B - C |) 'gradient_max' max(| A + B - (C + D)|,| A + C - (B + D)|) 'gradient_sum' |A + B - (C + D)| + |A + C - (B + D)| If an overflow occurs the result is clipped. The result of the operator is stored at the pixel with the coordinates of "D".

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

• 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。
• 在图像通道级别自动并行化。
• Automatically parallelized on domain level.

参数表

read_image(Image,'fabrik')
roberts(Image,Roberts,'roberts_max')
threshold(Roberts,Margin,128,255)

read_image(&Image,"fabrik");
roberts(Image,&Roberts,"roberts_max");
threshold(Roberts,&Margin,128.0,255.0);

read_image(Image,'fabrik')
roberts(Image,Roberts,'roberts_max')
threshold(Roberts,Margin,128,255)

read_image(Image,'fabrik')
roberts(Image,Roberts,'roberts_max')
threshold(Roberts,Margin,128,255)

read_image(Image,'fabrik')
roberts(Image,Roberts,'roberts_max')
threshold(Roberts,Margin,128,255)

结果

robertsrobertsRobertsRobertsRobertsroberts 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

binomial_filterbinomial_filterBinomialFilterBinomialFilterBinomialFilterbinomial_filter, gauss_filtergauss_filterGaussFilterGaussFilterGaussFiltergauss_filter

可能的后置算子

thresholdthresholdThresholdThresholdThresholdthreshold, skeletonskeletonSkeletonSkeletonSkeletonskeleton

可替代算子

edges_imageedges_imageEdgesImageEdgesImageEdgesImageedges_image, sobel_ampsobel_ampSobelAmpSobelAmpSobelAmpsobel_amp, frei_ampfrei_ampFreiAmpFreiAmpFreiAmpfrei_amp, kirsch_ampkirsch_ampKirschAmpKirschAmpKirschAmpkirsch_amp, prewitt_ampprewitt_ampPrewittAmpPrewittAmpPrewittAmpprewitt_amp

参考其它

laplacelaplaceLaplaceLaplaceLaplacelaplace, highpass_imagehighpass_imageHighpassImageHighpassImageHighpassImagehighpass_image, bandpass_imagebandpass_imageBandpassImageBandpassImageBandpassImagebandpass_image

模块

Foundation