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    • 10. 发明授权
    • Image signal processing apparatus and image pickup device
    • 图像信号处理装置和图像拾取装置
    • US6141047A
    • 2000-10-31
    • US744272
    • 1996-11-06
    • Kenji KawaiKoji Takahashi
    • Kenji KawaiKoji Takahashi
    • H04N5/202H04N5/235H04N5/238H04N5/243H04N9/73
    • H04N5/202H04N5/235H04N5/2352H04N5/238H04N5/243
    • Fine operation processing such as nonlinear processing is performed in units of frames in correspondence with each photographing frame. In order to effectively utilize the dynamic range of a digital processing circuit, there is provided an image processing apparatus which includes a varying circuit for varying the signal level in correspondence with the photographing contents, an A/D converter for converting an output varied by the varying circuit into a digital signal, an image memory for storing image information output from the A/D converter, an evaluation circuit for evaluating the image information, an operation circuit for performing operation processing of a signal output from the image memory, and a control circuit for controlling the varying circuit and the operation circuit on the basis of the evaluation result of the evaluation circuit. There is also provided an image pickup device in which the varying circuit includes an iris control circuit, a shutter speed control circuit, or a gain control circuit, and varies the signal level using the circuit.
    • 以与各拍摄帧对应的帧为单位进行非线性处理等精细的动作处理。 为了有效地利用数字处理电路的动态范围,提供了一种图像处理装置,其包括用于根据拍摄内容改变信号电平的变化电路,用于转换由 变换电路转换为数字信号;图像存储器,用于存储从A / D转换器输出的图像信息;评估电路,用于评估图像信息;操作电路,用于执行从图像存储器输出的信号的操作处理;以及控制 电路,用于根据评估电路的评估结果控制变化电路和运行电路。 还提供了一种图像拾取装置,其中变化电路包括光圈控制电路,快门速度控制电路或增益控制电路,并且使用电路改变信号电平。