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Why do images auto-scale the intensity and how do I disable this?

I am displaying an image from a FireWire camera (collected with "IMAQdx Get Image.vi") in an image indicator (Vision->Image Display) on the front panel. When the intensity distribution changes, the overall intensity seems to auto-scale. But if change the intensity in one part of the image and I put a cursor in another part of the image, the Image Information box tells me that the pixel value does not change even though the visible intensity of the indicator changes.

 

I have also made a comparison with the "good old" intensity graph. Then I have to use "IMAQdx Get Image Data.vi" and unwrap the data array before presenting the image in the intensity graph. If I turn off AutoScale Z, one part of the image does not affect the rest, but if I turn it on, the image behaves like the Image Display above. Evidently, there is some kind of auto-scaling in the Image Display.

 

Can someone tell me if and how I can turn off this auto-scaling?

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Double post.
Bruce Ammons
Ammons Engineering
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Other post with Bruce's answer is here

 

Best Regards

 

David

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