Aforge 关于摄像头亮度、对比度等参数设置

用Aforge调用了摄像头，但一直没有找到设置摄像头亮度、对比度、灰度等方法，查阅资料发现，原来就这么简单：
 

VideoCaptureDevice Cam1;
FilterInfoCollection VideoCaptureDevices;

VideoCaptureDevices = new FilterInfoCollection(FilterCategory.VideoInputDevice);
Cam1 = new VideoCaptureDevice(VideoCaptureDevices[0].MonikerString);
Cam1.DisplayPropertyPage(IntPtr.Zero); //这将显示带有摄像头控件的窗体

 这个调节摄像头得控件，功能很多。

如图： 

当然，你可以选择不使用DisplayPropertyPage（），直接访问摄像头：

FilterInfoCollection videoDevices = 
    new FilterInfoCollection(FilterCategory.VideoInputDevice);

VideoCaptureDevice videoDevice = 
    new VideoCaptureDevice(videoDevices[camDevice].MonikerString);

videoDevice.SetCameraProperty(
    CameraControlProperty.Zoom,
    zoomValue,
    CameraControlFlags.Manual);

videoDevice.SetCameraProperty(
    CameraControlProperty.Focus,
    focusValue,
    CameraControlFlags.Manual);

videoDevice.SetCameraProperty(
    CameraControlProperty.Exposure,
    exposureValue,
    CameraControlFlags.Manual);

要访问其他相机属性，如亮度，对比度，请参阅 IAMVideoProcAmp实现 

videoDevice.SetVideoProperty(
    VideoProcAmpProperty.Brightness,
    brightnessValue,
    VideoProcAmpFlags.Manual);

videoDevice.SetVideoProperty(
    VideoProcAmpProperty.Contrast,
    contrastValue,
    VideoProcAmpFlags.Manual);

videoDevice.SetVideoProperty(
    VideoProcAmpProperty.Saturation,
    saturationValue,
    VideoProcAmpFlags.Manual);

videoDevice.SetVideoProperty(
    VideoProcAmpProperty.Sharpness,
    sharpnessValue,
    VideoProcAmpFlags.Manual);

videoDevice.SetVideoProperty(
    VideoProcAmpProperty.WhiteBalance,
    whiteBalanceValue,
    VideoProcAmpFlags.Manual);

videoDevice.SetVideoProperty(
    VideoProcAmpProperty.BacklightCompensation,
    backlightCompensationValue,
    VideoProcAmpFlags.Manual);