California Institute of Technology, Division of Physics, Mathematics, and Astronomy, Pasadena, California 91125, USA.
J Biomed Opt. 2010 Jan-Feb;15(1):016013. doi: 10.1117/1.3292012.
It is difficult to predict exactly what blind subjects with camera-driven visual prostheses (e.g., retinal implants) can perceive. Thus, it is prudent to offer them a wide variety of image processing filters and the capability to engage these filters repeatedly in any user-defined order to enhance their visual perception. To attain true portability, we employ a commercial off-the-shelf battery-powered general purpose Linux microprocessor platform to create the microcomputer-based artificial vision support system (microAVS(2)) for real-time image processing. Truly standalone, microAVS(2) is smaller than a deck of playing cards, lightweight, fast, and equipped with USB, RS-232 and Ethernet interfaces. Image processing filters on microAVS(2) operate in a user-defined linear sequential-loop fashion, resulting in vastly reduced memory and CPU requirements during execution. MiccroAVS(2) imports raw video frames from a USB or IP camera, performs image processing, and issues the processed data over an outbound Internet TCP/IP or RS-232 connection to the visual prosthesis system. Hence, microAVS(2) affords users of current and future visual prostheses independent mobility and the capability to customize the visual perception generated. Additionally, microAVS(2) can easily be reconfigured for other prosthetic systems. Testing of microAVS(2) with actual retinal implant carriers is envisioned in the near future.
对于使用摄像驱动型视觉假体（如视网膜植入物）的盲人，我们很难准确预测他们能感知到什么。因此，为他们提供各种各样的图像处理滤波器，并提供反复以任何用户定义的顺序使用这些滤波器的功能，以增强他们的视觉感知，这是谨慎的做法。为了实现真正的便携性，我们采用商用现成的电池供电通用目的 Linux 微处理器平台，为实时图像处理创建基于微机的人工视觉支持系统（microAVS(2)）。真正独立的 microAVS(2) 比一副扑克牌还小，重量轻、速度快，并配备了 USB、RS-232 和以太网接口。microAVS(2) 上的图像处理滤波器以用户定义的线性顺序循环方式运行，从而大大降低了执行过程中的内存和 CPU 需求。miccroAVS(2) 从 USB 或 IP 摄像机导入原始视频帧，执行图像处理，并通过出站 Internet TCP/IP 或 RS-232 连接将处理后的数据发送到视觉假体系统。因此，microAVS(2) 为当前和未来的视觉假体用户提供了独立的移动性和生成定制视觉感知的能力。此外，microAVS(2) 可以轻松地为其他假体系统重新配置。预计在不久的将来，将对实际的视网膜植入物载体进行 microAVS(2) 测试。
