Symbol verification is an additional manned workflow step helping users to handle symbol detection results that may be considered ambiguous or incorrectly detected.
- Improved detection marks questionable symbols placing them to a separate ‘To verify’ group.
- Users should decide themselves what to do with these questionable results.
How Do Symbols Get Into Verification Group
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If two symbols detected by different templates are close to each other and their bounding boxes overlap by more than 90%.
Example of detection of two separate symbols by two templates:
- Overlapping is around 30%.
- They will be placed to groups according to their templates (as they would do before this update).
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Example of detection of two overlapping symbol results:
- Two templates were set up here, one like the left symbol and another like the right
- It is seen that the left symbol pattern includes the right one, so this symbol was picked up twice and without the feature it would be placed in both detection groups
- New algorithm places both symbol results to a new group called ‘To verify’ because their bounding boxes overlap by a value close to 100%
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Example of Incorrect Detection
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Setup: the following symbol template:
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Result:
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As you can see here, symbols include EW3 as well because they are too close to EW2
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This will serve us as a good example of how to apply new feature in order to enhance symbol takeoffs