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    Focus control method and video camera apparatus
    1.
    发明授权
    Focus control method and video camera apparatus 失效
    对焦控制方法和摄像机

    公开(公告)号：US6034727A

    公开(公告)日：2000-03-07

    申请号：US776870

    申请日：1997-03-19

    申请人： Yujiro Ito ,  Naoki Inomata ,  Chiaki Ikeyama ,  Susumu Kurita

    发明人： Yujiro Ito ,  Naoki Inomata ,  Chiaki Ikeyama ,  Susumu Kurita

    IPC分类号： H04N5/232

    CPC分类号： H04N5/23212

    摘要： Focus control is provided by estimating an estimation value by extracting a high-frequency component of a video signal for each focus lens position. The correct focus lens position for focusing a target object is determined as that focus lens position where the estimation value for a plurality of conditions at a particular focus lens position becomes maximum. The estimation value is determined to be maximum when, for successive focus lens positions, the estimation value decreases continuously. The various conditions for imaging, according to an aspect of the focus control, includes the filter coefficients for extracting the high-frequency component of the video signal and the size of the windows from which the video signal is imaged. The estimation value for each focus lens position is determined for these various conditions for imaging and a predetermined weight is allocated thereto, wherein the estimation value is determined to increase when the weighted sum indicating an increase outweighs that for a decrease.

    摘要翻译： PCT No.PCT / JP96 / 01523 Sec。 371日期1997年3月19日 102（e）1997年3月19日PCT PCT 1996年6月5日PCT公布。 第WO96 / 39776号公报 日期：1996年12月12日通过针对每个聚焦透镜位置提取视频信号的高频分量来估计估计值来提供聚焦控制。 将用于聚焦目标物体的正确的聚焦透镜位置确定为在特定聚焦透镜位置处的多个条件的估计值变为最大的聚焦透镜位置。 对于连续的聚焦透镜位置，估计值连续减小，则估计值被确定为最大值。 根据焦点控制的一个方面，用于成像的各种条件包括用于提取视频信号的高频分量的滤波器系数和视频信号成像的窗口的大小。 对于这些用于成像的各种条件确定每个聚焦透镜位置的估计值，并且分配预定的重量，其中当指示增加的加权和超过减少的加权和时，确定估计值增加。

    Focus control method and video camera
    2.
    发明授权
    Focus control method and video camera 失效
    对焦控制方式和摄像机

    公开(公告)号：US06222587B1

    公开(公告)日：2001-04-24

    申请号：US08776896

    申请日：1997-03-21

    申请人： Yujiro Ito ,  Naoki Inomata ,  Chiaki Ikeyama ,  Susumu Kurita

    发明人： Yujiro Ito ,  Naoki Inomata ,  Chiaki Ikeyama ,  Susumu Kurita

    IPC分类号： H04N5232

    CPC分类号： H04N5/2352 ,  H04N5/23212

    摘要： An autofocus apparatus of an imaging apparatus is one having an estimation-value calculating unit for obtaining a plurality of estimation values by using a plurality of areas and a plurality of filters for extracting a horizontal-direction frequency component in a specific image area of a video signal corresponding to a specific image area and supplied from an imaging apparatus for effectively carrying out an autofocus operation of a television camera, a signal processing unit for calculating a control value used for controlling an image pickup lens drive unit of the imaging apparatus in response to an estimation value calculated by the above estimation-value calculating unit, and an output unit for supplying the above control value to the above image pickup lens drive unit. The autofocus apparatus includes a control program for determining a focus detection direction by decision by majority of a plurality of weighted estimation values obtained by combination of the above plurality of areas and the above plurality of filters.

    摘要翻译： 成像装置的自动对焦装置是具有用于通过使用多个区域获得多个估计值的估计值计算单元和用于提取视频的特定图像区域中的水平方向频率分量的多个滤波器 信号对应于特定图像区域并从成像装置提供，用于有效地执行电视摄像机的自动对焦操作;信号处理单元，用于计算用于控制成像装置的摄像镜头驱动单元的响应于 由上述估计值计算单元计算的估计值，以及用于将上述控制值提供给上述摄像镜头驱动单元的输出单元。 自动对焦装置包括：控制程序，用于通过由上述多个区域和上述多个滤波器的组合获得的多个加权估计值的多数决定来确定焦点检测方向。