发明名称 Electronic camera using flash for exposure control
摘要 A camera CPU internally provided at a digital still camera determines an exposure time based upon an image signal input from a CCD via a control circuit. The camera CPU also implements preliminary photographing which is accompanied by light emission by an electronic flash unit, obtains a light emission quantity at the electronic flash unit for main photographing based upon the results of preliminary photographing and determines the flash time using the light emission quantity. If the flash time is longer than the exposure time, the camera CPU reduces the length of flash time. The camera CPU calculates the quantity of underexposure occurring as a result of the exposure ending before the illumination by the electronic flash unit is completed. An image processing circuit engages in color correction by incorporating the quantity of underexposure that has been calculated in advance when it processes image data obtained through an imaging operation.
申请公布号 US6359651(B1) 申请公布日期 2002.03.19
申请号 US19990412651 申请日期 1999.10.05
申请人 NIKON CORPORATION 发明人 YOKONUMA NORIKAZU
分类号 H04N5/235;(IPC1-7):H04N5/235;G03B9/70;H04N3/14 主分类号 H04N5/235
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