A PC digital still camera based on a mega-pixel CCD area array is presented This camera can be used as an image input device in the applications of multimedia. The system is equipped with a conventional camera lens, and an 1.5 mega-pixel progressive color CCD area array. A driving circuit is designed to control the focusing and the iris of the lens in order to perform auto/manual focus and auto/manual exposure functions. The CCD image sensor is also used as a sensor for auto focus. auto exposure and auto white balance control. This could eliminate the additional sensors. A shutter wheel is built for continuos exposure, which allows the host computer to display the entire field of view for preview without using an additional optical view-finder The digital signal processing is implemented in a computer software for interpolation, color reproduction. and edge enhancement etc. A SCSI interface is used to connect to a host computer for data and command transmission
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