Quote:
Originally Posted by RyanCahoon
I do like the idea of just passing through the images from the camera. [writchie] I think you hinted at this, but does the Axis cam supports changing JPEG quality levels?
--Ryan
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The compression level (quality) on the Axis camera is set when the stream is started. It has to remain constant for the stream.
I missed the imaqFlatten function (the C API version). It looks like there is a lot of good stuff in the vision library that time didn't allow us to explore yet. BTW, I believe that NIVision.h is proprietary - not open source. This is one of the few files we cannot modify and distribute. We are licensed only to use it - like the other proprietary components. National Instruments is being very nice to us. We need to fully respect all of their IP rights.
Depending on how good the jpg encoder is, i.e. speed and file size at high compression settings, it looks like it might be possible to handle higher quality 320x240 images (for better tracking), scale them to 160x120, compress them with a high setting, and ship them off to the dashboard while maintaining 25 fps.
Since the jpg decoding speed is pretty slow, I would expect the encoding speed to have similar issues. Have you measured how much processor time is required to encode at high compression settings?