An adaptive threshold corner detector based on multi-scale chord-angle sharpness accumulation

作者：Xing Yuanxiu; Zhang Dengyi; Zhao Jianhui

来源：Geomatics and Information Science of Wuhan University, 2015, 40(5): 617-622 and 627.

DOI：10.13203/j.whugis20130095

• Adaptive thresholds
• Chord-angel sharpness accumulation
• Computational costs
• Corner detector
• Detection accuracy
• Dynamic-adaptive
• Noisy image
• Response functions

We propose a new adaptive corner detector based on multi-scale chord-angle sharpness accumulation, which can reduce location error and detects fine accuracy on noisy images. Firstly, we use the canny detector to detect edges at low computational cost. Secondly, we devise support regions of the contour into three sections as scales and computes the chord-angel sharpness respectively, then accumulate the three scale sharpness as corner response function. Finally, we use an dynamic adaptive corner threshold to label corners. The results on fine and low quality images show that the proposed algorithm performs better than the other three algorithms in terms of both detection accuracy and location error.

• 出版日期2015
• 单位武汉科技大学