Advanced Fast Autofocusing
    1.
    发明申请
    Advanced Fast Autofocusing 审中-公开
    高级快速自动对焦

    公开(公告)号:US20150296123A1

    公开(公告)日:2015-10-15

    申请号:US14319391

    申请日:2014-06-30

    IPC分类号: H04N5/232 G03B13/36

    CPC分类号: H04N5/23212 H04N17/002

    摘要: Several autofocus techniques are disclosed. The autofocus techniques help the device to achieve focus without presenting unpleasant blurred images to the operator of the camera, e.g., by dividing image frames into technical frames and display frames, with autofocus search occurring during technical frames. With another technique, the upper bound of the spatial frequencies of the blurred image permits a calculation of the focused lens position. Another technique searches for focus in jumps that exponentially decrease the search space with each jump. In another focusing technique, the lens is moved through a range of positions during a frame acquired with a rolling shutter exposure and the focused position may be determined from the sharpest row of the frame.

    摘要翻译: 公开了几种自动对焦技术。 自动对焦技术有助于设备实现对焦,而不向摄像机的操作者呈现不愉快的模糊图像,例如通过在技术帧期间发生自动对焦搜索将图像帧分割成技术帧和显示帧。 利用另一种技术,模糊图像的空间频率的上限允许聚焦透镜位置的计算。 另一种技术搜索跳跃中的焦点,每次跳跃都会以指数方式减少搜索空间。 在另一种聚焦技术中,透镜在通过滚动快门曝光获取的帧期间移动通过一定范围的位置,并且聚焦位置可以从帧的最锐的行确定。