September 2013
Beginner
756 pages
19h 35m
English
Content preview from Introduction to Digital Image Processing
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TABLE 14.2-1. Threshhold Levels and Associated Edge Detection Probabilities for 3 × 3 Edge Detectors as Determined by the Abdou
and Pratt Pattern Recognition Design Procedure
Vertical Edge Diagonal Edge
SNR = 1 SNR = 10 SNR = 1 SNR = 10
Operator t
N
P
D
P
F
t
N
P
D
P
F
t
N
P
D
P
F
t
N
P
D
P
F
Roberts orthogonal
gradient
1.36 0.559 0.400 0.67 0.892 0.105 1.74 0.551 0.469 0.78 0.778 0.221
Prewitt orthogonal
gradient
1.16 0.608 0.384 0.66 0.912 0.480 1.19 0.593 0.387 0.64 0.931 0.064
Sobel orthogonal
gradient
1.18 0.600 0.395 0.66 0.923 0.057 1.14 0.604 0.376 0.63 0.947 0.053
Prewitt compass
template gradient
1.52 0.613 0.466 0.73 0.886 0.136 1.51 0.618 0.472 0.71 0.900 0.153 ...
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