This information can be found in the Image Acquisition Toolbox documentation at the following URL:
The frame rate is a characteristic of the camera (the device). For example, standard RS170 and NTSC cameras will operate at 30 Hz, CCIR and PAL will operate at 25 Hz. Non-standard devices can be configured to operate at higher rates. Any rate supported by the device and the acquisition system is supported by the toolbox.
Frame rate is a device-specific property. All device-specific properties are properties of video source objects, not video input objects. To access these device specific properties from MATLAB, use this code:
vid = videoinput('winvideo');
src = getselectedsource(vid);
get(src)
If your device exposes a frame rate property, it should be included in the list of properties. If you see a frame rate property listed, you can change its value using the toolbox's SET function on the video source object (src).
If you do not see a frame rate property listed, there is no way to change it from inside MATLAB.
In regards to how many images can be acquired and processed in real-time, it depends what is meant by "real-time". The Image Acquisition Toolbox processes data as it is acquiring it. Given a fast enough processor, simple enough algorithm, or slow enough acquisition rate, the toolbox can process data as it comes in. We often refer to this as "soft real-time."
This is in contrast to "hard real-time" systems, such as xPC and RTW, where you are guaranteed to execute a certain line of code every x milliseconds. The Image Acquisition Toolbox does not make this guarantee.
