Does the motion control depend on the image results? Is this a feedback system, or just a processing loop?
If it is a feedback system, you need to process it as fast as possible to get the next move. In that case, I would do everything in one loop in sequence - read image, process image, move stage. In that case, you would read the next available image every time through the loop.
If you are trying to process every single image, you could do a producer consumer loop, but it isn't really necessary. In this case, you want a large image buffer and use the loop index to tell it which buffer to read next. This way, even if your processing gets a little behind, it can catch up. Of course, your processing has to be faster than your image acquisition, or you will just get further and further behind and eventually overrun the buffer.
It really depends on the application when you are deciding your acquisition and processing strategy.
Bruce
Bruce Ammons
Ammons Engineering
