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Interactive alignment and image reconstruction for wafer-level multi-aperture camera systems

 
: Oberdörster, Alexander; Brückner, Andreas; Lensch, Hendrik P.A.

:

Tescher, A.G. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Applications of Digital Image Processing XXXVII : 18–21 August 2014, San Diego, California, United States
Bellingham, WA: SPIE, 2014 (Proceedings of SPIE 9217)
ISBN: 978-1-6284-1244-4
Paper 921715, 8 S.
Conference "Applications of Digital Image Processing" <37, 2014, San Diego/Calif.>
Englisch
Konferenzbeitrag
Fraunhofer IOF ()
camera; camera calibration; uperresolution; image reconstruction; multi-aperture cameras

Abstract
Assembly of miniaturized high-resolution cameras is typically carried out by active alignment. The sensor image is constantly monitored while the lens stack is adjusted. When sharpness is acceptable in all regions of the image, the lens position over the sensor is fixed. For multi-aperture cameras, this approach is not sufficient. During prototyping, it is beneficial to see the complete reconstructed image, assembled from all optical channels. However, typical reconstruction algorithms are high-quality offline methods that require calibration. As the geometric setup of the camera repeatedly changes during assembly, this would require frequent re-calibration. We present a real-time algorithm for an interactive preview of the reconstructed image during camera alignment. With this algorithm, systematic alignment errors can be tracked and corrected during assembly. Known imperfections of optical components can also be included in the reconstruction. Finally, the algorithm easily maps to very simple GPU operations, making it ideal for applications in mobile devices where power consumption is critical.

: http://publica.fraunhofer.de/dokumente/N-309158.html