Vertical sync in the video display

When quickly displaying images using view IMAQ, the tearing of image is always present (frame rendering is a fragmented combination of two separate frames). The synchronous display option does not lighten the problem. Adding a delay time does not eliminate the problem. How can I force the vertical sync in Labview?

Thank you

-root

Hi, root,

Just short explanation: LabVIEW itself (more exactly - IMAQ Vision) is not supported for vsync for display of images (I mean the order placed on the front panel). But that IMAQ Vision vsync IMAQ draw (where you can activate it with window NonTearing IMAQ).

What you can do the following: use IMAQ draw instead of image display. Image will be displayed in a separate window, but you can incorporate int IMAQ window façade as window children.

Another method - use DirectDraw to get vertical white of the graphics card. This method may work for moderate image sizes. If you try to view a large enough image, then it will not work, because it is time for refreshment will be greater than the time between white.

In any case, example as an attachment.

Andrey.

Tags: NI Software

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