determination of the spacial coordinates from Vision Builder AI

[djokovic17]

good morning,
I wanted to know how with   vision builder AI or labview I could transform the pixel coordinates of a point in spacial coordinates.

[Hooovahh]

I don't have Vision Builder AI installed but I know that there were tools for setting up real world to pixel measurement.  You'll of course need a baseline which is usually done by placing a ruler in the field of view and doing edge detection to find the number of pixels in that known distance.  If memory serves me right I'm pretty sure there are examples installed which demonstrate this.

[djokovic17]

hi

please can you specify to me where can i find this example.

[Hooovahh]

Again I don't have this installed, but I'm pretty sure Vision Builder AI has them in the splash screen.  Also check the Help menu.  In LabVIEW there is an Example Finder and in Vision Builder AI I think there is some equivalent.

[ChristopheC]

Here are a couple spatial calibration examples shipped with Vision Builder AI:

C:\Program Files (x86)\National Instruments\Vision Builder AI\Examples\Calibrate Image Step Example.vbai

C:\Program Files (x86)\National Instruments\Vision Builder AI 2014\Examples\Tutorial 2 - Image Calibration and Gauging.vbai

C:\Program Files (x86)\National Instruments\Vision Builder AI\Examples\Tutorial 4 - Two Cameras Inspections.vbai

This PDF goes through the detailed steps to reproduce Tutorial 2 and 4:

http://www.ni.com/pdf/manuals/373379f.pdf

Hope this helps.

Christophe