Open circular image

[RubenJeronimo]

Hi everybody,
Using vision assistant 2014, i would like to "open" a circular image from circle, in order to perform a OCR inspection.

I dont know how to do it...
I attach the original image and the desired image.

Original Image:

Desired Image:

I have searched in Geometry function, from Image palette in NI Vision Assistant but it only permits resampling, rotation and symmetry of the image!

Thanks in advance,

Rúben Jerónimo

[BruceAmmons]

The function you want is Unwrap, but I don't think it is available in Vision Assistant.  It is available in LabVIEW, though.

Bruce

[ChristopheC]

Bruce is right. Unfortunately, this function is not available in Vision Assistant. You can call it in the Run LabVIEW step.

However, you should not need to unwrap the image to use the OCR step. The OCR step and OCR Training Utility support the annulus region of interest tool. If you position the annulus correctly, the only parameter you need to specify is the Annulus Orientation (Baseline Inside or Baseline Ouside) to train the letters properly.

Hope this helps.

Christophe

[Hatef.fouladi]

there is a example in labview that use unwrapping to read bar code
you can see the example make your own code and
as ChristopheC told call it in VA
but also you do not need that and you can use edge detection with ovel Rio
for more information search unwrap barcode.vi in labview examples