Portable computer camera with a color image play-back LCD

Yusheng Tim Tsai; Wen-Hsin Chan

doi:10.1117/12.204836

Abstract

A prototype of portable digital still camera (DSC) used as a computer input device, and a consumer product as well, is developed in the laboratory. The system performs auto focus, auto exposure, and auto white balance, associated with a zoom lens and its controller. The auto exposure algorithm used fuzzy logic and picture segments for exposure decision. A DSP ASIC has been developed for color image processing. The images are compressed with a JPEG IC, and are stored in a PCMCIA memory card. At compression ratio 18 to 1, a 2 Mbyte memory card can store about 36 color images. An energy saving strategy is implemented in a power control module, and results in two hours operation time or 200 pictures by using a normal camcorder battery. A color LCD panel is used for real time display and playback. The SCSI interface driver has been designed to provide PC connection. The system also has NTSC and S-video connection terminals for real time video display.

Citation Download Citation

Yusheng Tim Tsai and Wen-Hsin Chan "Portable computer camera with a color image play-back LCD", Proc. SPIE 2416, Cameras and Systems for Electronic Photography and Scientific Imaging, (14 March 1995); doi: 10.1117/12.204836; https://doi.org/10.1117/12.204836

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