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    • 16. 发明授权
    • Image input apparatus having addition and subtraction processing
    • 具有加法和减法处理的图像输入装置
    • US07023479B2
    • 2006-04-04
    • US09853706
    • 2001-05-14
    • Makoto HiramatsuMotohiro Ishikawa
    • Makoto HiramatsuMotohiro Ishikawa
    • H04N9/64H04N5/238
    • H04N5/3651H04N5/2353H04N5/355
    • Image data having a high S/N ratio is obtained even when the exposure time is relatively long. To achieve the above object, there is provided an image input apparatus in which an accumulation mode is set with the shutter open, thereby acquiring image data A1. The shutter is then closed, and the accumulation mode is set to acquire subtraction data between the image data and black image data A2. This processing is repeated to acquire image data A1 and subtraction data A2, and these subtraction data are added. These operations A1, A2, and A3 are repeated a predetermined number of times to update addition data, and image processing is performed on the basis of the updated addition data.
    • 即使曝光时间较长,也可获得S / N比高的图像数据。 为了实现上述目的,提供了一种图像输入装置,其中在快门打开时设定累积模式,从而获取图像数据A 1。 然后关闭快门,并且设置累加模式以获取图像数据和黑色图像数据A 2之间的减法数据。 重复该处理以获得图像数据A 1和减法数据A 2,并且将这些减法数据相加。 这些操作A 1,A 2和A 3重复预定次数以更新相加数据,并且基于更新的附加数据执行图像处理。