Digital Signal Processing Reference
In-Depth Information
2.5
Image Binarization
Image binarization is the image of the whole image only black and white two colors
represent pixel 0 and pixel 1.
Table 1.
Pixels and images of the binary logic operations
P
Q
P and Q
P or Q
Not P
0
0
0
0
1
0
1
0
1
1
1
0
0
1
0
1
1
1
1
0
During the two values, the key point is to find the appropriate threshold, so its is
important to separate the hair bulb part and no pilling fabric part. After binarization,
the image can maintain a good prototype, will not throw away a useful shape, it does
not produce additional vacancy. Threshold procedure is produced by user to specify a
threshold or auto-generate by algorithm.The image in pixel gray value is less than the
threshold, the pixel gray value is set to 0 or 255, or gray value is set for 255 or 0.
Fig. 5.
The image after binarization
Fig. 6.
If the image is not the white point of pilling characteristics part., then the image
represented by black and white image should be reversed with the symbol "~" negated, other-
wise the values obtained after the opposite.
