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    FLICKER REDUCTION METHOD, IMAGE PICKUP DEVICE, AND FLICKER REDUCTION CIRCUIT
    1.
    发明公开
    FLICKER REDUCTION METHOD, IMAGE PICKUP DEVICE, AND FLICKER REDUCTION CIRCUIT 审中-公开
    闪烁减少方法，图像拾取装置和闪烁减少电路

    公开(公告)号：EP1566962A1

    公开(公告)日：2005-08-24

    申请号：EP03756640.3

    申请日：2003-10-16

    申请人： SONY CORPORATION

    发明人： KINOSHITA, Masaya, Sony Corporation ,  NAKAMURA, Makibi, Sony Corporation ,  TANAKA, Kenji, Sony Corporation

    IPC分类号： H04N5/335 ,  H04N5/243

    CPC分类号： H04N5/243 ,  H04N5/2357

    摘要： A fluorescent light flicker characteristic of an XY addressing type image pickup device such as a CMOS image pickup device is accurately detected and reliably and sufficiently reduced through a simple signal processing without using an photosensitive element regardless of the level of a video signal of a subject and the type of a fluorescent lamp.
    A signal In'(x,y) is an RGB primary color signal or a luminance signal, each containing a flicker component. The signal In'(x,y) is integrated over a duration of time equal to or longer than one horizontal period, and a difference value between the integrated values of adjacent fields is normalized by the average value of the integrated values of three consecutive fields. The normalized difference value gn(y) is discrete Fourier transformed to extract a spectrum thereof, and a flicker coefficient Γn(y) is estimated from the extracted spectrum to calculate In'(x,y)/[1+Γn(y)].

    摘要翻译： 不管被摄体的视频信号的电平如何，通过简单的信号处理而不使用感光元件，可以准确地检测并可靠且充分地减少诸如CMOS图像拾取装置的XY寻址型图像拾取装置的荧光闪烁特性， 荧光灯的类型。 信号In'（x，y）是RGB原色信号或亮度信号，每个包含闪烁分量。 在等于或长于一个水平周期的持续时间内对信号In'（x，y）进行积分，并将相邻场的积分值之间的差值归一化为三个连续场的积分值的平均值 。 对归一化差分值gn（y）进行离散傅立叶变换以提取其频谱，并且从提取的频谱估计闪烁系数Γn（y）以计算In'（x，y）/ [1 +Γn（y）] 。

    IMAGE PROJECTOR, PROJECTED IMAGE PATTERN, LASER DRIVER, IMAGING DEVICE
    2.
    发明公开
    IMAGE PROJECTOR, PROJECTED IMAGE PATTERN, LASER DRIVER, IMAGING DEVICE 有权
    KAMERA MIT HOLOGRAFISCHEM AUTOFOKUS-BILDMUSTER

    公开(公告)号：EP1260844A1

    公开(公告)日：2002-11-27

    申请号：EP01999850.9

    申请日：2001-12-05

    申请人： Sony Corporation

    发明人： NAKAMURA, Makibi, Sony Corporation

    IPC分类号： G02B7/28 ,  G02B7/36 ,  G03B3/00 ,  H04N5/232

    CPC分类号： H04N5/2256 ,  G02B5/32 ,  G02B7/32 ,  G02B7/36 ,  G03B3/10 ,  G03B13/34 ,  G03B13/36 ,  G03B17/02 ,  G03B21/26 ,  G03H1/2249 ,  G03H2001/2218 ,  G03H2001/2221 ,  G03H2001/2244 ,  G03H2210/20 ,  H01S5/068 ,  H01S5/06825 ,  H04N5/23212

    摘要： The present invention relates to an image projection apparatus, a projection image pattern, a laser drive apparatus and a camera apparatus fit for use with an electronic still camera for example. In the present invention, when a microcpmputer 8 detects that a shutter release 9 is depressed, a focusing lens 3 is controlled so that a contrast signal obtained when a luminance signal from a camera signal processing circuit 6 is supplied to an auto focusing detection circuit 7 may become maximum. A control signal from the microcomputer 8 is supplied to a laser driver 13, so that a laser diode 14 is driven to generate light of laser beams only while this control signal is supplied to the laser driver. The light of laser beams thus generated is further condensed into light of parallel laser beams by a condenser 15. These parallel laser beams are applied to a hologram plate 16 and thereby diffracted.
    The laser beams thus diffracted are caused to interfere with each other, whereby a hologram reproduced image 17 is reproduced.
    This makes it possible to project a hologram reproduced image with sufficient contrast onto an object by small power consumption. Therefore, satisfactory focusing can be made in an auto focus mode of the contrast detection system or in a manual focus mode. At the same time, this apparatus can really be incorporated, for example, into a small electronic still camera with ease.

    摘要翻译： 本发明涉及例如适用于电子静态照相机的图像投影装置，投影图像图案，激光驱动装置和照相机装置。 在本发明中，当微计算机8检测到快门释放9被按下时，控制聚焦透镜3，使得当将来自相机信号处理电路6的亮度信号提供给自动聚焦检测电路7时获得的对比度信号 可能会变得最大。 来自微型计算机8的控制信号被提供给激光驱动器13，使得仅当该控制信号被提供给激光驱动器时，激光二极管14被驱动以产生激光束的光。 由此产生的激光束的光被冷凝器15进一步冷凝成平行的激光束的光。这些平行的激光束被施加到全息板16上，从而被衍射。 因此衍射的激光束彼此干涉，从而再现全息图再现图像17。 这使得可以通过小功耗将具有足够对比度的全息图再现图像投射到对象上。 因此，可以在对比度检测系统的自动对焦模式或手动对焦模式中进行令人满意的聚焦。 同时，该装置可以真正地被并入，例如，容易地并入小型电子静态照相机中。