How does Labview handle 16bit images with the VI "ImagetoArray"?

Hi...
The ImagetoArray function in labview 6.1 handles 16 bit images as an I16 data. This seems to cause memory overflow when I have intensities past 32k. How do I change this to an unsigned 16 bit array or is there a different function that I can use? Thanks much

Ivan,
At first I wasn't sure what you were asking. Now I think I understand.
If you have a 16 bit image, it doesn't matter if it is signed or unsigned. Both the U16 and I16 have 65,000 different intensity values, the numbers are just represented differently. In order to convert a 2-Dimensional I16 array to a 2-Dimensional U16 array, you will need to do some simple bit manipulation.
Basically you need to first cast the I16 into a U16 and then XOR each element in the I16 2D Array with a 0b1000000000000000. I have attached an example VI which shows how to do this. This basically changes the flips the left most bit.
I hope I answered your question,
Lorne Hengst
Application Engineer
National Instruments
Attachments:
IMAQ Signed Unsigned Example.vi ‏51 KB

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How does Labview handle 16bit images with the VI "ImagetoAr​ray"?

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How does Labview handle 16bit images with the VI "ImagetoArray"?