AForge.NET中如何去配置视频亮度对比度等参数？

Question

刚接触AForge.NET，求大神指点[align=left]，如何去配置我自己的摄像头的亮度等参数。第一次发帖，求助大家了。         VideoCaptureDevice UsbVideo;
        private void Form1_Load(object sender, EventArgs e)
        {
            
            FilterInfoCollection videoDevices = new FilterInfoCollection(FilterCategory.Vi[/align]deoInputDevice);
            if (videoDevices.Count > 0)
            { 
                UsbVideo = new VideoCaptureDevice(videoDevices[1].MonikerString);                sourcePlayer.VideoSource = UsbVideo;
                UsbVideo.VideoResolution = UsbVideo.VideoCapabilities[0];
                sourcePlayer.Start();
            }
            else
            {
            }
        }

Answer 1

你看看这个
http://blog.csdn.net/libby1984/article/details/51454516

Answer 2

你看看这个
http://blog.csdn.net/libby1984/article/details/51454516 

Answer 3

AForge.directshow本来就没有修改视频亮度和对比度的方法，想要实现这个方法，可以在源码中：加上这段代码：
public bool SetCameraProcAmp(VideoProcAmpProperty property, int value, VideoProcAmpFlags controlFlags)
        {
            bool ret = true;            // check if source was set
            if ((deviceMoniker == null) || (string.IsNullOrEmpty(deviceMoniker)))
            {
                throw new ArgumentException("Video source is not specified.");
            }            lock (sync)
            {
                object tempSourceObject = null;                // create source device's object
                try
                {
                    tempSourceObject = FilterInfo.CreateFilter(deviceMoniker);
                }
                catch
                {
                    throw new ApplicationException("Failed creating device object for moniker.");
                }                if (!(tempSourceObject is IAMCameraControl))
                {
                    throw new NotSupportedException("The video source does not support camera control.");
                }                IAMVideoProcAmp videoProcAmp = (IAMVideoProcAmp)tempSourceObject;
                int hr = videoProcAmp.Set(property, value, controlFlags);                ret = (hr >= 0);                Marshal.ReleaseComObject(tempSourceObject);
            }            return ret;
        }
其中使用的一些类和枚举类型：
 /// <summary>
    /// From VideoProcAmpProperty
    /// </summary>
    public enum VideoProcAmpProperty
    {
        /// <summary>
        /// 亮度
        /// </summary>
        Brightness,
        /// <summary>
        /// 对比度
        /// </summary>
        Contrast,
        /// <summary>
        /// 色相
        /// </summary>
        Hue,
        /// <summary>
        /// 饱和度
        /// </summary>
        Saturation,
        /// <summary>
        /// 清晰度
        /// </summary>
        Sharpness,
        /// <summary>
        /// 伽马
        /// </summary>
        Gamma,
        /// <summary>
        /// 启用颜色
        /// </summary>
        ColorEnable,
        /// <summary>
        /// 白平衡
        /// </summary>
        WhiteBalance,
        /// <summary>
        /// 逆光对比
        /// </summary>
        BacklightCompensation,
        /// <summary>
        /// 增益
        /// </summary>
        Gain
    }
    /// <summary>
    /// From VideoProcAmpFlags
    /// </summary>
    [Flags]
    public enum VideoProcAmpFlags
    {
        /// <summary>
        /// 默认
        /// </summary>
        None = 0,
        /// <summary>
        /// 自动
        /// </summary>
        Auto = 0x0001,
        /// <summary>
        /// 手动
        /// </summary>
        Manual = 0x0002
    }
[ComImport, System.Security.SuppressUnmanagedCodeSecurity,
    Guid("C6E13360-30AC-11d0-A18C-00A0C9118956"),
    InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    interface IAMVideoProcAmp
    {
        [PreserveSig]
        int GetRange(
            [In] VideoProcAmpProperty Property,
            [Out] out int pMin,
            [Out] out int pMax,
            [Out] out int pSteppingDelta,
            [Out] out int pDefault,
            [Out] out VideoProcAmpFlags pCapsFlags
            );        [PreserveSig]
        int Set(
            [In] VideoProcAmpProperty Property,
            [In] int lValue,
            [In] VideoProcAmpFlags Flags
            );        [PreserveSig]
        int Get(
            [In] VideoProcAmpProperty Property,
            [Out] out int lValue,
            [Out] out VideoProcAmpFlags Flags
            );
    }