Multispectral digital camera system with at least two independent digital cameras

摘要

Digital camera system (2) with an image processing unit (4) and with at least two separate digital cameras (3.1-3.4) which detect image signals in different spectral intervals narrowband having a separate shutter respectively ( 8a) and / or a separate objective (8b) and having respectively at least one separate sensor digital image plane (6) and at least one color filter (7.1-7.4) connected upstream of the at least one sensor digital image plane (6) corresponding to respective narrowband spectral range, with at least one filter region (7a.1-7a.4) additionally having at least one neutral region (7b) which is permeable to light spectral range (ND) comprising at least different spectral ranges narrowband of at least two separate digital cameras (3.1-3.4), and which is arranged on at least one neutral region determined pixel (6b) of at least sensor level digital image (6) associated, the unit image processing (4) configured to perform a method for adjusting a color balance of the digital camera system (2), determining deviations of the exposure time being and / or the quantities of light between the at least two separate digital cameras (3.1-3.4) of the digital camera system (2) with a synchronous capture image of the same scene (9) of the at least two separate chambers (3.1 -3.4), comparing with each other, once the synchronous capture image, the amounts of light reception in the respective regions of neutral pixels (6b) of digital image sensors planes (6) of at least two independent digital cameras (3.1-3.4), after which, in processing an image of the same scene (9) synchronously picked up by at least two separate digital cameras (3.1-3.4) in the respective intervals spectrograph signal narrowband (R, G, B, NIR) different, a calculation of compensation is performed so that the image signals of the spectral respective narrowband (R, G, B, NIR) intervals respectively remain unchanged, They amplified or attenuated manner corresponding to the previously determined deviations.