Computer Vision Analysis of a Melting Interface Problem with Natural Convection - Visual Computing: Scientific Visualization and Imaging Systems - page 219

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Fig. 12.11 Edges examples: a Ramp edge, b Step edge, c Line, d Roof edge

Fig. 12.12 Methods of edge detection: a Log, b Prewitt, c Roberts, d Sobel, e Zero-cross

The Canny algorithm was considered the best method. With the criteria used in
this algorithm, even if the edge has a small slope and amplitude of intensity
sufficiently reduced, the Canny method was shown efficient.