1. An apparatus, comprising: an image processing circuitry configured to: receive cropping data that defines a plurality of sub-images; define individual lines of pixels for image capture by an image sensor of only lines of pixels needed for the plurality of sub-images; direct an image sensor to provide, relating to one image frame, image information comprising only the defined individual lines of pixels; receive from the image sensor the image information relating to the one image frame; produce the plurality of sub-images from the received image information according to the cropping data; and forward the plurality of sub-images through an output; wherein the image sensor and the an image processing circuitry are parts of a camera unit and the output is a camera unit interface configured to exchange information between the camera unit and a circuitry external to the camera unit; and wherein the image processing circuitry is further configured to send image information relating to the one frame over the camera unit interface only as the plurality of sub-images.