Practical edge finding with a robust estimator
نویسنده
چکیده
This paper presents a new algorithm for locating the boundaries of textured regions (both step changes and outliers) using a robust estimator. Previous robust image lters perform poorly on binary images, blur edges, round corners, and run slowly. I avoid artifacts on binary images by modelling them as continuous and interpolating values. Information is combined directly between non-adjacent locations to prevent blurring. Corners are sharpened by relabelling mis-classiied pixels. The algorithm is made as fast as a Marr-Hildreth edge nder by restructuring the esti-mator as a series of 2D image operations, using new multi-ring order statistic operators, and running most of the estimator on a randomly sampled image.
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