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A novel moment-based method for sub-pixel edge location is proposed. Based on coarse edge-location by SOBEL operator, the geometric information of the target is used to reduce the number of moment-template to only one, which can largely save the time. Experimental results demonstrate that the proposed method is effective with more robustness, higher precision and speed.
The arithmetic based on Canny's regulation has been widely used in image edge detection. This paper illustrates the algorithm and proposes an improved method based on the Histogram-based fuzzy C-means clustering algorithm for the lack of the Canny algorithm, so the Canny algorithm can adaptively determine the double thresholds. Its application in detecting road surface distress image produces good...
To obtain the center of a circle in the digital image with high precision is always the key issue in the target recognition and location. Starting from the subpixel edge location, a improved algorithm for obtaining the subpixel edge, in this paper, is first brought forward based on the geometrical feature of the center and gray-distributed characteristic of the practical image. Then, the center location...
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