IMAQ image with black squares

[ShaneJ]

Hi. I'm using LabView to take a series of images with a camera. When I preview the image in the camera's software it appears normal. I use Labview/IMAQ and the VIs that came with the camera. The problem is that the output TIFF files have this nasty black square checker pattern. I'm making 8bit images. I there something I can change in IMAQ or the output as TIFF that could explain this problem? Or is it likely something in the third party VIs? I can explain more if need be.


Thanks,


-SHane

[J.Harv]

Shane--

       The first thing to check whether it is the 3rd party VI's or not.  You didn't even mention what kind of camera you are using, but whether you have a framebrabber or not, if you go to Measurement and Automation Explorer and try to do a snap there do you still see this behavior?  This is where you can directly interact with the driver to see what the software is interpreting from your camera.  Depending on what type of camera you have you may need a camera file.  You can check at www.ni.com/camera to see if we have one.  If not, you might check with the manufacturer, if they have VI's they might also have the camera file.  If you respond back please include what type of camera and framegrabber you are using.  Also, what type of video signal does the camera send out?  [If its is a standard you won't need the camera file]  Just let me know and we can work from there.

Regards,

John H
Applications Engineer
National Instruments