AVT Guppy 033 B device is the same image twice on the < Session Out > event: Frame made

Sometimes the event gets the same image twice, but with an increase, correct the image of the index (see photo index 125, 126).

We use a type AVT Guppy 033 B firewire camera to measure the distance between plants. The camera fires all 40mm the breakpoint of the NI7344 of motion control output.

We work with the latest Labview and Vision version 8.6.1 could the firewire driver cause this problem. We use the original driver

Microsoft XP, SP3. Should install us the driver of the TRA instead, other suggestions?

Thanks for any help.

Syn66,

Looks like your code without taking into account the fact that the Images are passed by reference. It seems that you still spend the same image GetImage and then put it in your queue. Each iteration you will be overwrite the content of the image of the singular and all the elements in the queue is pointing to the same data of the image.

If you want to structure your code like this, you'll probably want to create an image of each iteration of the loop, call GetImage use it and then put it in the queue. When you treat it and get out of the queue, you can then destroy it. You can optimize the image allocate/free sentence (which may or may not be meaningful) with a strategy of ping-pong by having a separate queue images empty and then you delete the images of this queue empty, GetImage to use and place it in your existing queue of images to process. After the treatment, instead of simply releasing them you would put them back in the empty queue.

Hope this helps,
Eric

Tags: NI Hardware

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