Using ROIs (AOIs)

Region of Interest (ROI) also called Area of Interest (AOI) can be selected so that only a defined region of the sensor is used. When a sub image has been defined, only data from the selected rows will be digitized.

Selecting a sub image increases the frame readout rate and reduces image storage requirements. Examples of sub-image selection and spooling rates are shown in Sensor Readout Optimisation.

It should be noted that for small ROIs (e.g. < 512 x 512 pixels), the achievable frame rate for 3-tap and 10-tap becomes identical. This is due to the fact that the amount of data transmitted across the Camera Link interface for these ROIs is relatively small and the limiting factor becomes the rate at which data can be read off the sensor.

It should also be noted that while ROIs can also be set up for any area of the sensor, those which are vertically centred on the sensor mid line will result in the maximum frame rates.