[Home][18. Image Processing][18.2 Processing Filters]
18.2 Set Image Processing Filters
The image processing will be applied to all images before recognition. As far as the operation is concerned, this means setting three filters:
Edge Filters;
Threshold Filters; and
Clean-Up Filters.
In Figure 18.3,
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to select an Edge Filter, click the Edge Filter Drop Down List, which is the first List in the red box;
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to select a Threshold Filter, click the Threshold Filter Drop Down List, which is the second List;
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to select a Clean-Up Filter, click the Clean-Up Filter Drop Down List, which is the third List.
The Edge Filters attempt to exaggerate the main features a user is looking for.
The Threshold Filters attempt to suppress the background.
The Clean-Up Filters will smooth the resulting image to reduce recognition error.
The default setting is:
Edge Filter = 2
Threshold Filter = 1
Clean-Up Filter = 2
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