Missing images IMAQ, parallel

Hello, I use Gigabit Ehternet camera and after grabbing an image I get models and cut (always two models cut). So I have to small fragments of image caught (left square, Ellipse of left, right square, Ellipse on the right). For the moment I deal only with the Ellipses. Left and right Ellipse are placed as a WhichType.vi entry and subsequently GrainDecision.vi. If I only use one instance of WhichType everything is ok, and I have all of the missing images in ResultGrainLeft or to the right. But if I put two vi's, like on description.jpg, sometimes there are missing images in the indicators of IMAQImage or something's wrong with them (both the same images or something like added random images), but there are no errors and score changes. Any ideas what may be wrong in GrainDecision.vi?

Karol

Karol,

The problem is in the GrainDecision.vi and the constants that you pass to IMAQ create. The images are unique by a name, and if an image with the name of entry has already been created, it is the image that will be returned. Two calls to IMAQ create with the same input will create only a single image, regardless of the context in which it was admitted. Each instance of GrainDecision.vi will use the same thresholdGrain, SubDstGrain, images etc. I also recommend not to use images useless temporary destination. In general, you can leave the destination unwired image and the source image will be altered. You can probably eliminate 3-5 of these calls IMAQ create in GrainDecision.vi and your memory footprint and get a small speed improvement

Tags: NI Hardware

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