Snap does all the camera setup before taking an image, and shuts everything down after taking an image. That is why it takes about 3 seconds per image.
The easiest way is to use continuous image acquisition (Grab) and just grab the most recent image when you need, or perhaps the next image.
If you need more precise timing, you probably want to use triggered image acquisition. Send a hardware signal to the camera when you need it to take an image, then acquire the last image. This requires a little more setup in the camera and in wiring.
Bruce
Bruce Ammons
Ammons Engineering
