关键词: ROC分析, Canny算子, 景象匹配, 边缘检测

Abstract: Receiver Operating Characteristics (ROC) analysis method, which can perform a multiple threshold evaluation without the prior probability of classes, was applied to improve the performance of Canny edge detection algorithm in scene matching. Firstly, several edge detection results were computed using combinations of the Canny detector’s parameters. The results were then tested for correspondence by each pixel. Then ground truth edge image was estimated using correspondence threshold which was optimized by ROC analysis. After obtaining the ground truth edges of reference image and real-time image, scene matching process was performed finally. The experimental results show that the method is robust and can be obtainable for high matching precision and registration probability at the condition of existing geometry distortion and luminance difference between matching images. This method has practical implementations of scene matching with automatic parameters setting process.

Key words: Receiver Operating Characteristics (ROC) analysis, Canny operator, scene matching, edge detection