Lettering detection with Imac Vision Builder

[Bernhard_F]

Hi

I have to create a Lab View 6 VI to detect different letterings with Imac Vision Builder 6.

I try to solve this problem with pattern matching.

The lettering is printed in Arial 12 or Arial 12 bold with different space between the letters.

I’ve got the best results if the VI detects single letters

If I'll detect the whole lettering, for example: AO123, the matching result to AD128 is higher or equal than the matching result to AO123.

How I'll be able to separate a single letter and mask out the rest?

Message Edited by Bernhard_F on 01-10-2006 06:33 AM

[ThSa]

Hi Bernhard,
you can use for this step the IMAGE Mask function.
The pattern match function delivers a cluster with the coordinates of the letter, out of this cluster it's possible to extract the ROI information for the image mask function.
There are two important parameters for this function:
- outside/inside ROI -> it's possible to include or exclude the information within the ROI of the picture
- extract masked region -> enabled: the information within the ROI will be extracted in a "new" resized picture; disabled: the original size of the picture remains constant, but the information outside of the ROI (in case of inside ROI), will deleted.

regards,
ThSa