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1. 发明公开

EP2356811A1 FLICKER DETECTION CIRCUIT FOR IMAGING SENSORS THAT EMPLOY ROLLING SHUTTERS 有权
标题翻译：用于成像传感器的闪光检测电路使用滚动遮光器
公开(公告)号：EP2356811A1
公开(公告)日：2011-08-17
申请号：EP09825693.6
申请日：2009-11-13
申请人： ATI Technologies ULC
发明人： GREENLAND, Graham, C.H. , ALEKSIC, Milivoje , GOMA, Sergio
IPC分类号： H04N5/335 , G03B19/18 , H04N3/15
CPC分类号： H04N5/3532 , G03B19/18 , H04N5/23248 , H04N5/23254 , H04N5/23267 , H04N5/2357
摘要： Circuitry, apparatus and methods provide flicker detection and improved image generation for digital cameras that employ image sensors. In one example, circuitry and methods are operative to compare a first captured frame with a second captured frame that may be, for example, sequential and consecutive or non-consecutive if desired, to determine misalignment of scene content between the frames. A realigned second frame is produced by realigning the second frame with the first frame if the frames are determined to be misaligned. Luminance data from the realigned second frame and luminance data from the pixels of the first frame are used to determine if an undesired flicker condition exists. If an undesired flicker condition is detected, exposure time control information is generated for output to the imaging sensor that captured the frame, to reduce flicker. This operation may be done, for example, during a preview mode for a digital camera, or may be performed at any other suitable time.
摘要翻译：电路，设备和方法为采用图像传感器的数字照相机提供闪烁检测和改进的图像生成。在一个示例中，电路和方法可用于比较第一捕获帧与第二捕获帧，所述第二捕获帧例如可以是顺序且连续的或者如果期望的话是不连续的，以确定帧之间的场景内容的未对准。如果帧被确定为未对准，则通过将第二帧与第一帧重新对准来产生重新对准的第二帧。使用来自重新对准的第二帧的亮度数据和来自第一帧的像素的亮度数据来确定是否存在不期望的闪烁状况。如果检测到不希望的闪烁状况，则生成曝光时间控制信息以输出到捕获帧的成像传感器，以减少闪烁。例如，可以在数字照相机的预览模式期间完成该操作，或者可以在任何其他合适的时间执行该操作。

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