Patent ID: 8542288

Claim:
A camera system comprising: at least two imaging units, each imaging unit comprising a lens unit and an aperture unit wherein each aperture unit is configured to pass light through an aperture during an exposure period and each aperture unit is arranged such that light passing through its aperture passes through the respective lens unit; and a processing unit configured to combine primary images obtained from the imaging units to an output image, wherein the apertures of the at least two aperture units have different sizes, one of the primary images is a reference image and the other primary images feature different shift values describing the displacement of the respective other primary image relative to the reference image, the processing unit comprises a pre-processing unit configured to transfer sharpness information from primary images obtained from imaging units with narrow apertures into primary images obtained from imaging units with wide apertures to obtain pre-processed images, and the pre-processing unit comprises a high-pass filter configured to extract sharpness information from the primary image obtained from an imaging unit having the narrowest aperture and summation units, each summation unit configured to add the sharpness information to one of the other primary images to obtain the pre-processed images.