We took the TWAIN approach as it does not limit you in the long run.  Also, we use Atalasoft TWAIN imaging tools which have worked very well for us.  They are run-time royalty free and we interface with all types of TWAIN devices from web cameras to high-end scanners.

I thought I share this question before hunting for answers.



I need to be able to capture image every few seconds without human interventions. Previously,I had done this before in DOS and Win32 with Proprietary drivers from the vendor, where a camera is sending analog signals and the card would convert it to digital frames and I could grab a frame and save it.



Now, with new devices, I wonder if I should follow the same route (from Analog to digital), or are there [inexpensive] digital cameras that continuously sends digital frames without the need for conversation and grabbing?

This would be my first choice.



OR



a) Has anyone used any "Video Grabber" (either as USB device or card) to capture single frame picture in .Net?



b) Any suggestion on the brand and model?



c) Is DirectShow my best tool to use, to control the device?



d) Or should I approach it from TWAIN direction



Thanks!

..ßen