Krisch I, Hijazi N, Hosticka B J
Fraunhofer Institute for Microelectronic Circuits and Systems, 47057 Duisburg, Germany.
Biomed Tech (Berl). 2002;47 Suppl 1 Pt 1:171-3. doi: 10.1515/bmte.2002.47.s1a.171.
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.
该文稿介绍了一种用于患有角膜混浊的患者的“眼内视觉辅助（IOVA）”系统。为了获得患者的认可，该系统必须小型化到一定程度，以便将图像采集、图像处理和电源集成到一个便携式单元中。一款动态范围超过100 dB的CMOS相机拍摄景物图像。其图像传感器的分辨率为380×300像素。为了减少固定模式噪声，片上实现了相关双采样。此外，该传感器具有低功耗、随机像素访问和局部亮度自适应的特点。一个模数转换器允许直接耦合到外部信号处理器或用于图像处理以压缩数据的单片集成单元。
