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Table 2

Comparison between Sobel and Canny edge detection techniques.

Method Sensitivity Operation Advantage Disadvantage
Sobel operator Medium Maximum of edges are identified with respect to perpendicular angle Finding of smooth edges, used for image segmentation, simplicity Computation time is high compare to Robert operator, less sensitive to noise high compare to Robert operator
Canny Operator High Used to eliminate the noise and to find the effective edges Finding the error rate is high, performance is good, used for image enhancement, smooth noise, good localization High computation time, complex process, false zero crossing.

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