Curvature product corner detection in direct curvature scale space

Curvature product corner detection in direct curvature scale space
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直接曲率尺度空间中的曲率乘积角点检测

DOI:
10.1504/ijcvr.2010.036081
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发表时间:
2010-10
影响因子:
--
通讯作者:
Li, Chang
Li, Chang
中科院分区:
--
文献类型:
--
作者:
Zhong, Baojiang;Li, Chang

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提出并研究了一种基于直接曲率尺度空间(DCSS)技术的高效角点检测器,称为曲率积直接曲率尺度空间(CP-DCSS)角点检测器。从真实图像中提取感兴趣目标的轮廓,然后将其曲率函数分别与高斯函数进行卷积,高斯函数的标准差逐渐增大,并作为角点检测的尺度参数。通过测量在几个给定尺度下计算的曲率值的乘积,可以容易地检测轮廓上的真实角点,因为虚假或不重要的角点已经被有效地抑制。当曲率积的绝对值超过给定阈值并且是所述点处的局部最大值时,将点声明为拐角。CP-DCSS结合了两个最近提出的角点检测器,即,DCSS角点检测器和多尺度曲率积(MSCP)角点检测器的优点。与DCSS相比,CP-DCSS省略了DCSS映射的解析过程,因此它具有更简单的结构。与MSCP相比,CP-DCSS同样工作得很好,但是计算成本更低。
An efficient corner detector based on the direct curvature scale space (DCSS) technique, referred to as the curvature product direct curvature scale space (CP-DCSS) corner detector, is introduced and studied. The contours of interested objects are extracted from a real-world image, and then their curvature functions are respectively convolved with the Gaussian function, whose standard deviation gradually increases and is treated as a scale parameter of corner detection. By measuring the product of the curvature values computed at several given scales, true corners on the contours can be easily detected since false or insignificant corners have been effectively suppressed. A point is declared as a corner when the absolute value of the curvature product exceeds a given threshold and is a local maximum at the mentioned point. CP-DCSS combines the advantages of two recently proposed corner detectors, namely, the DCSS corner detector and the multi-scale curvature product (MSCP) corner detector. Compared to DCSS, CP-DCSS omits a parsing process of the DCSS map, and hence it has a simpler structure. Compared to MSCP, CP-DCSS works equally well, however, at less computational cost.
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