IMAQ AND IEEE 1394 problem

When I use IMAQ vi's to acquire and process an image from a 1409 board and a standard ntsc camera ,my IMAQ vi's for IMAQ Clamp Horizontal MAX and IMAQ Find Vertical Edge work fine and display the overlay information properly using IMAQ WindDraw. When i run the same application using the setup and acquire vi's for IEEE 1394 and a firewire camera , when i show overlay information from the Edge detection tools ,the overlays are never refreshed , meaning the IMAQ WindDraw output window Image contains every overlay , it never overwrites the others with the current overlay. The screen becomes filled with the overlay information and cannot be cleared out. Why is this ? How to work around this ? The show search line can also be turned on and shown in
the window ,but when you turn them off ,they also stay onscreen. This behavior is not that way when I use the framegrabber/ analog camera configuration.

It sounds like IMAQ for IEEE 1394 does not clear the overlay information when you reuse a buffer.
The simplest solution would be to use IMAQ Clear Overlay immediately after the image acquisition. This will remove any existing overlays that were left over from the previous image.
Bruce
Bruce Ammons
Ammons Engineering

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    Bruce Ammons wrote in message news:<[email protected]>...
    > The Sony video cameras will not work with the IMAQ for IEEE-1394
    > drivers. The format that the video camera sends is compressed and is
    > not compatible.
    >
    > You might have luck with some other methods, though. I think Irene
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    > such as internet cams or video cameras using VFW. There are one or
    > two other methods out there, also. I haven't needed to use a Sony
    > camera, so I haven't tested any of these.
    >
    > Bruce
    I just got it working with DV camcorder today. But I haven't update my
    website. I need to do a final test over this weekend. On next Monday I
    will post an update in m
    y website. So far I've tested on Cannon ZR45MC
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    Attachments:
    dragonfly.pdf ‏1052 KB

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  • KT4 Ultra-SR and IEEE 1394

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  • IEEE 1394 for IMAQ Deployment Issue

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    You do need to install IMAQ for IEEE 1394 separately. I believe you need to purchase a license for each computer you will be using it on. You should call NI or your local sales rep to get the details.
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  • IEEE 1394 Camera Not Visible in MAX

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    MK
    [email protected]

    Hello,
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  • How to grab two IEEE 1394 cameras simultaneously?

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    It is definitely possible to acquire from two or more firewire cameras simultaneously, as long as you are not exceeding the bandwidth of the firewire bus (which you should not be at a frame rate of 3.75 fps).
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