is it possible to treat a mpeg movie (selected area intensity profiles) with imaq ?

[scientific researcher]

From a mpeg movie file (recorded with a digital camera in grayscale colors), I want to create some windows fixed in a selected area (always the same during all the treatment). Then, from this window, integrate all the grayscale level data for each image and thus get a plot represented the integrated intensity versus the time. Is it possible to make that kind of specific application using IMAQ ? Note, that my movie file resolution will be 800 000 pixels, and a rate of images from 50 down to 5 images per second.

[Yusuf C]

Hello,

NI-IMAQ does not directly support mpeg movie file format. Click here to see the example of reading and writing video to AVI files on our website.
Let me know if you have further questions regarding this.

Regards,

Yusuf C.
Applications Engineering
National Instruments

[Irene He]

I just updated IVision to version 1.3. It adds the support for media file formats such as *.mpeg, *.asf, *.avi (different from my existing avi functions that these new ones supports almost all avi compression format unlike VFW based avi functions). I also added capabilities to make LV vi to be callback vi so that real time video processing can be done better. So you can use IMAQ vision or my toolkit to code your image processing vi like you mentioned fixed ROI and calculates the intensity of it and display this in a graph updated with time while video streaming. Check out my site at:
http://www.geocities.com/irene_he/IVision.html
there is a similar demo to show this.
Irene