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Image aquisition and image processing for the intraocular vision aid

: Krisch, I.; Hijazi, N.; Hosticka, B.J.

Deutsche Gesellschaft für Biomedizinische Technik -DGBMT-:
Deutsche Gesellschaft für Biomedizinische Technik. 36. Jahrestagung 2002 : 25.-27. September 2002, Universität Karlsruhe (TH)
Berlin: Schiele & Schön, 2002 (Biomedizinische Technik 47.2002, Ergänzungsband 1, Tl.1)
ISSN: 0013-5585
pp.171-173 : Lit.
Deutsche Gesellschaft für Biomedizinische Technik (Jahrestagung) <36, 2002, Karlsruhe>
Conference Paper
Fraunhofer IMS ()
CMOS image sensor; micro implantable prothesis; CMOS; Bildsensor; Sehhilfe

The contribution describes an "intraocular vision aid (IOVA)" system for patients suffering from corneal opacification. In order to gain patients' acceptance the system has to be miniaturized to a magnitude that image aquisition, image processing, and power supply can be integrated into a portable unit. A CMOS camera whose dynamic range covers more than 100 dB takes pictures of the scenery. Its image sensor has a resolution of 380 x 300 pixel. In order to reduce fixed pattern noise correlated double sampling is implemented on-chip. In addition, this sensor stands out for low power consuption, random pixel access, and local brightness adaptation. An analog-digital-converter allows direct coupling to an external signal processor or a monolithically integrated unit for image processing to compress data.