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    • 2. 发明申请
    • AUTOFOCUS CONTROL METHOD
    • 自动控制方法
    • US20110164866A1
    • 2011-07-07
    • US12984336
    • 2011-01-04
    • Norio KAYAMAYue SHEN
    • Norio KAYAMAYue SHEN
    • G03B13/34
    • H04N5/23212H04N5/23219
    • A ring-like region excluding a central region and a peripheral region from an image pickup area is preset as a focus area. An image signal is acquired through a lens and a CCD circuit. Based on the image signal thus acquired, a contrast value indicating the degree of in-focus of the preset focus area is calculated. A lens position corresponding to a maximum contrast value of the preset focus area is determined as an in-focus lens position. In autofocus processing, face detection is carried out first. Then, if the result of face detection is successful, a face region is set up as a focus area, and focus adjustment is performed based thereon. Alternatively, if the result of face detection is unsuccessful, focus adjustment is performed based on the preset focus area.
    • 将来自摄像区域的中心区域和周边区域以外的环状区域预先设定为聚焦区域。 通过透镜和CCD电路获取图像信号。 基于这样获得的图像信号,计算表示预设对焦区域的对焦度的对比度值。 对应于预设聚焦区域的最大对比度值的透镜位置被确定为对焦透镜位置。 在自动对焦处理中,首先进行脸部检测。 然后,如果脸部检测的结果成功,则将面部区域设置为聚焦区域,并且基于此进行聚焦调整。 或者,如果脸部检测的结果不成功,则基于预设的对焦区域进行焦点调整。