title: Image acquisition and image processing for the intraocular vision aid.
abstract: 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 acquisition, 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 consumption, 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.
authors.affiliation: Fraunhofer Institute for Microelectronic Circuits and Systems, 47057 Duisburg, Germany. krisch@ims.fhg.de
authors.forename: I
authors.initials: I
authors.lastname: Krisch
authors.forename: N
authors.initials: N
authors.lastname: Hijazi
authors.forename: B J
authors.initials: BJ
authors.lastname: Hosticka
mesh_terms: D003199:Computer Systems; D003318:Corneal Opacity / Q000534:rehabilitation*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000295:instrumentation*; D008838:Microcomputers; D008904:Miniaturization / Q000295:instrumentation*; D019736:Prostheses and Implants; D012682:Sensory Aids