Image Processing Reference
In-Depth Information
(7.11a)
(7.11b)
(7.11c)
FIGURE 7.11: Example of number of edge pixels probe function: (a) Original image, (b)
Application to image with subimages of size 5×5, and (c) Application to image with
subimages of size 10×10.
(7.12a)
(7.12b)
(7.12c)
FIGURE 7.12: Example of average orientation probe function: (a) Original image, (b)
Application to image with subimages of size 5×5, and (c) Application to image with
subimages of size 10×10.
This frame calculates equivalence classes using the Indiscernibility relation of Defn. 1, i.e.,
given an image X, it will calculate X /∼ B where the objects are subimages of X. See Sec-
tion 7.3 for an explanation of the theory used to obtain these results. A sample calculation
using this frame is given in Fig. 7.13 and was obtained by the following steps:
1. Click Load Image button.
2. Select number of features (maximum allowed is four).
3. Select features (see Section 7.4 for a list of probe functions).
4. Select window size. The value is taken as the square root of the area for a square
subimage, e.g., a value of 5 creates a subimage of 25 pixels.
5. Click Run.
The result is given in Fig. 7.13 where the bottom left window contains an image of the
equivalence classes where each colour represents a single class. The bottom right window is
used to display equivalence classes by clicking in any of the three images. The coordinates
 
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