Emgu-WPF学习使用-中值模糊

Posted 2020-12-29 lonelyxmas

原文:Emgu-WPF学习使用-中值模糊

实现效果：

实现途径：

前提：Image File-> System.Drawing.Bitmap->Image<Bgr, byte>

string sFile = GlobalVar.DATAS_PATH + "Samples/Test1.png"; 
BitmapImage oOriginBitSrc = new BitmapImage(new Uri(sFile));
System.Drawing.Image oImgOrigin = System.Drawing.Image.FromFile(sFile);
System.Drawing.Bitmap oBitmap = new System.Drawing.Bitmap(oImgOrigin);
Image<Bgr, byte> imgSrc = new Image<Bgr, byte>(oBitmap);
oBitmap.Dispose();

第一行效果：原图->中值模糊->高斯模糊->灰度化->Otsu二值化。

 //中值模糊
 Image<Bgr, byte> imgMedian = imgSrc.SmoothMedian(5); //使用5*5的卷积核         
 // 高斯模糊
 Image<Bgr, byte> imgGaussian = imgMedian.SmoothGaussian(5);
 // 灰度化
 Image<Gray, byte> imgGray = new Image<Gray, byte>(imgGaussian.Size);
 CvInvoke.CvtColor(imgGaussian, imgGray, ColorConversion.Bgr2Gray);
 // Otsu二值化
 Image<Gray, byte> imgThresholdOtsu = new Image<Gray, byte>(imgGray.Size);
 CvInvoke.Threshold(imgGray, imgThresholdOtsu, 0, 255, ThresholdType.Otsu);

第二行效果：原图->灰度化 ->Otsu二值化 ->中值模糊

// 从原图直接灰度化
Image<Gray, byte> imgOriginGray = new Image<Gray, byte>(imgSrc.Size);
CvInvoke.CvtColor(imgSrc, imgOriginGray, ColorConversion.Bgr2Gray);
// Otsu二值化
Image<Gray, byte> imgOriginGrayThresholdOtsu = new Image<Gray, byte>(imgOriginGray.Size);
CvInvoke.Threshold(imgOriginGray, imgOriginGrayThresholdOtsu, 0, 255, ThresholdType.Otsu);
// 中值模糊
Image<Gray, byte> imgMedian = imgOriginGrayThresholdOtsu.SmoothMedian(5);
AppUtils.ShowGrayImage(this.ImgFun2Result3Zm, imgMedian);

第三行效果：原图?->灰度化?->高斯模糊->Otsu二值化

?// 从原图直接灰度化
Image<Gray, byte> imgOriginGray = new Image<Gray, byte>(imgSrc.Size);
CvInvoke.CvtColor(imgSrc, imgOriginGray, ColorConversion.Bgr2Gray);
// 高斯模糊
Image<Gray, byte> imgGaussian = imgOriginGray.SmoothGaussian(5);
// Otsu二值化
Image<Gray, byte> imgOriginGrayThresholdOtsu = new Image<Gray, byte>(imgGaussian.Size);
CvInvoke.Threshold(imgGaussian, imgOriginGrayThresholdOtsu, 0, 255, ThresholdType.Otsu);

其他：转为BitmapSource在WPF的Image中呈现。

        [DllImport("gdi32")]
        private static extern int DeleteObject(IntPtr o);

        /// <summary>
        /// Convert an IImage to a WPF BitmapSource. The result can be used in the Set Property of Image.Source
        /// </summary>
        /// <param name="image">The Emgu CV Image</param>
        /// <returns>The equivalent BitmapSource</returns>
        public static BitmapSource ToBitmapSource(IImage image)
        {
            using (System.Drawing.Bitmap source = image.Bitmap)
            {
                IntPtr ptr = source.GetHbitmap(); //obtain the Hbitmap

                BitmapSource bs = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(
                    ptr,
                    IntPtr.Zero,
                    Int32Rect.Empty,
                    System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());

                DeleteObject(ptr); //release the HBitmap
                return bs;
            }
        }

为了方便查看逐步效果，我提取了以下方法。

 public static void ShowImage(System.Windows.Controls.Image oImage, UMat src)
 {
    oImage.Dispatcher.Invoke(() => {
        oImage.Source = BitmapSourceConvert.ToBitmapSource(src);
     });
}
public static void ShowBgrImage(System.Windows.Controls.Image oImage, Image<Bgr, byte> src)
{
    oImage.Dispatcher.Invoke(() => {
        oImage.Source = BitmapSourceConvert.ToBitmapSource(src);
    });
}
public static void ShowGrayImage(System.Windows.Controls.Image oImage, Image<Gray, byte> src)
{
    oImage.Dispatcher.Invoke(() => {
        oImage.Source = BitmapSourceConvert.ToBitmapSource(src);
    });
}

我参考了链接：点击打开链接?https://www.cnblogs.com/CoverCat/p/5055644.html

? ? ? ? ? ? ? ? ? ? ? ?点击打开链接 ?http://www.cnblogs.com/CoverCat/p/5043833.html?