Glomeruli Extraction by Canny Operator with a Feedback Strategy
2010
This paper proposes an edge detection method by Canny operator with a feedback strategy for glomeruli extraction. As
we know, the effect of the Canny operator is determined by three parameters: high threshold, low threshold and standard
deviation. To obtain the appropriate parameters for each image, Otsu method is used to set high and low thresholds of
Canny operator firstly. And then, to select the optimal standard deviation, a feedback strategy is developed. After
parameter selection, Canny operator is applied to our renal biopsy images and experimental results show that some
samples can achieve successful extraction and the others result in the discontinuous edges of glomeruli. In the case of
the latter, the endpoints in an image should be located and connected to form a whole edge of glomerulus. The
experiments have produced the promising results for our samples.
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