Concrete Image Segmentation Based on Multiscale Mathematic Morphology Operators and Otsu Method

Figure 3

Comparisons of edge detection performance using different edge operators for (a)–(f) original CT image of C30 concrete and the edge image of different operators and (g)–(l) original CT image of C40 concrete and the edge image of different operators, respectively.

(a) Original CT image

(b) Sobel operator

(c) Roberts operator

(d) Prewitt operator

(e) Canny operator

(f) LOG operator

(g) Original CT image

(h) Sobel operator

(i) Roberts operator

(j) Prewitt operator

(k) Canny operator

(l) LOG operator