points_harris_binomialT_points_harris_binomialPointsHarrisBinomialPointsHarrisBinomialpoints_harris_binomial (算子)

名称

points_harris_binomialT_points_harris_binomialPointsHarrisBinomialPointsHarrisBinomialpoints_harris_binomial — 使用哈里斯（Harris）算子的二项式近似来检测感兴趣的点。

签名

描述

points_harrispoints_harrisPointsHarrisPointsHarrisPointsHarrispoints_harris extracts points of interest from an image ImageImageImageImageimageimage. The Harris operator is based upon the smoothed matrix where stands for a Binomial smoothing of size MaskSizeSmoothMaskSizeSmoothMaskSizeSmoothMaskSizeSmoothmaskSizeSmoothmask_size_smooth and and are the first derivatives of the image, computed with a Sobel filter of size MaskSizeGradMaskSizeGradMaskSizeGradMaskSizeGradmaskSizeGradmask_size_grad. The resulting points are the positive local extrema of If necessary, they can be restricted to points with a minimum filter response of ThresholdThresholdThresholdThresholdthresholdthreshold. By default the coordinates of the points are calculated with subpixel accuracy. This can be turned off by setting the parameter SubpixSubpixSubpixSubpixsubpixsubpix to 'off'.

注意

请注意，若使用域缩减后的图像作为输入，滤波器算子可能会返回意外结果。请参阅 滤波器 一章

执行信息

• 多线程类型：可重入（与非独占算子并行运行）。
• 多线程作用域：全局（可从任何线程调用）。
• 在内部数据级别上自动并行化。

参数

结果

points_harrispoints_harrisPointsHarrisPointsHarrisPointsHarrispoints_harris returns 2 ( H_MSG_TRUE) if all parameters are correct and no error occurs during the execution. 如果输入为空则可设置行为通过 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>)。如有必要，则抛出异常。

可能的后继

gen_cross_contour_xldgen_cross_contour_xldGenCrossContourXldGenCrossContourXldGenCrossContourXldgen_cross_contour_xld

替代

points_foerstnerpoints_foerstnerPointsFoerstnerPointsFoerstnerPointsFoerstnerpoints_foerstner, points_harrispoints_harrisPointsHarrisPointsHarrisPointsHarrispoints_harris, points_lepetitpoints_lepetitPointsLepetitPointsLepetitPointsLepetitpoints_lepetit, points_sojkapoints_sojkaPointsSojkaPointsSojkaPointsSojkapoints_sojka

参考文献

C. Harris, M. Stephens: “A combined corner and edge detector”. Proceedings of the 4th Alvey Vision Conference, pp. 147-151, 1988.
V. Gouet, N.Boujemaa: “Object-based queries using color points of interest”. IEEE Workshop on Content-Based Access of Image and Video Libraries, CVPR/CBAIVL 2001, Hawaii, USA, 2001.

模块

基础

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