1. An apparatus, comprising: an input configured to receive from an image sensor image information relating to one image frame; an image processing circuitry configured to produce a plurality of sub-images from the received image information according to given cropping data and to forward the plurality of sub-images through an output, wherein the plurality of sub-images comprise a first set of sub-images, wherein the image sensor and the apparatus 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 over the camera unit interface only as the plurality of sub-images; and an image processor configured to combine two or more sub-images for forming one or more high-dynamic range images, wherein the two or more sub-images comprise a second set of sub-images, and wherein each of the sub-images of the second set is of a different image frame and is representative of a common image object and is taken at different times using different exposure times.