英文学习网站,温州做网站多少钱,淘宝网站做多久,网站开发需要的资料C# WPF 显示图片和视频显示 EmuguCv、AForge.Net测试 原文:C# WPF 显示图片和视频显示 EmuguCv、AForge.Net测试WPF 没有用到 PictureBox, 而是用Image代替. 下面我试着加载显示一个图片 。 XAML Image x:NamesrcImgWidth400Height300… C# WPF 显示图片和视频显示 EmuguCv、AForge.Net测试 原文:C# WPF 显示图片和视频显示 EmuguCv、AForge.Net测试WPF 没有用到 PictureBox, 而是用Image代替. 下面我试着加载显示一个图片 。 XAML Image x:NamesrcImgWidth400Height300/Image CS Attempt 1: ImageBgr,ByteMy_ImagenewImageBgr,byte(Openfile.FileName);
srcImg.SourceMy_Image.ToBitmap(); Error Message Cannot implicitly convert type System.Drawing.Bitmap
to System.Windows.Media.ImageSource CS Attempt 2: ImageBgr,ByteMy_ImagenewImageBgr,byte(Openfile.FileName);
srcImg.SourcenewBitmapImage(My_Image); Error Message Error1The best overloaded method match forSystem.Windows.Media.Imaging.BitmapImage.BitmapImage(System.Uri) has some invalid arguments
Error2Argument1: cannot convert fromEmgu.CV.ImageEmgu.CV.Structure.Bgr,byte to System.Uri解决方法 ImageBgr, Byte My_Image new ImageBgr, byte(Openfile.FileName);
srcImg.Source BitmapSourceConvert.ToBitmapSource(myImage); public static class BitmapSourceConvert
{[DllImport(gdi32)]private static extern int DeleteObject(IntPtr o);public static BitmapSource ToBitmapSource(IImage image){using (System.Drawing.Bitmap source image.Bitmap){IntPtr ptr source.GetHbitmap();BitmapSource bs System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(ptr,IntPtr.Zero,Int32Rect.Empty,System.Windows.Media.Imaging.BitmapSizeOptions.FromEmptyOptions());DeleteObject(ptr);return bs;}}
} 测试 Bitmap bm (Bitmap)Bitmap.FromFile(D:\my_testfiles\Main.png);int count 10000000;for (int i 0; i count; i){Commons.BitMapToImageSource(bm.Clone() as Bitmap);} 结果 当循环 1527次 耗时 00:00:17.8860231后 报错。 ErrorTrace at System.Drawing.Bitmap.GetHbitmap(Color background)at System.Drawing.Bitmap.GetHbitmap()at SimpleClient.Commons.BitMapToImageSource(Bitmap bitmap) in D:\my_svn\universal-project\SimpleClient\Program.cs:line 165 ErrorMessage: system.OutOfMemoryException: Out of memory. 改进写一个视频显示控件内部实现显示Bitmap转换成BitmapSource。为控件Source开辟一块内存控件然后一直刷新。首先我们使用EmuguCV里面的Capture。控件继承Image、IDisposable接口并开放一个属性VideoSource。 代码如下 public class CapPlayer : Image, IDisposable{private Capture videoSource;public Capture VideoSource{set{if (value ! null){this.videoSource value;this.LaodCapPlayer();}}}private InteropBitmap bitmapSource;private IntPtr map;private IntPtr section;public CapPlayer(){Application.Current.Exit new ExitEventHandler(Current_Exit);}private void LaodCapPlayer(){videoSource.ImageGrabbed new Capture.GrabEventHandler(videoSource_ImageGrabbed);videoSource.Start();uint pcount (uint)(videoSource.Width * videoSource.Height * PixelFormats.Bgr32.BitsPerPixel / 8);section CreateFileMapping(new IntPtr(-1), IntPtr.Zero, 0x04, 0, pcount, null);map MapViewOfFile(section, 0xF001F, 0, 0, pcount);bitmapSource Imaging.CreateBitmapSourceFromMemorySection(section, (int)videoSource.Width, (int)videoSource.Height, PixelFormats.Bgr32,(int)(videoSource.Width * PixelFormats.Bgr32.BitsPerPixel / 8), 0) as InteropBitmap;this.Source bitmapSource;}void videoSource_ImageGrabbed(object sender, EventArgs e){Capture camera sender as Capture;var frame camera.RetrieveBgrFrame().Bitmap;if (this.Dispatcher ! null){this.Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority.Render, (SendOrPostCallback)delegate{if (map ! IntPtr.Zero){try{System.Drawing.Imaging.BitmapData bmpData frame.LockBits(new System.Drawing.Rectangle(0, 0, (int)videoSource.Width, (int)videoSource.Height),System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format32bppRgb);/* Get the pointer to the pixels */IntPtr pBmp bmpData.Scan0;int srcStride bmpData.Stride;int pSize srcStride * (int)videoSource.Height;CopyMemory(map, pBmp, pSize);frame.UnlockBits(bmpData);}catch (Exception ex){Microsoft.Practices.EnterpriseLibrary.Logging.Logger.Write(ex, Info, 0);}}if (bitmapSource ! null){bitmapSource.Invalidate();}}, null);}if (captureLock){try{lock (mutCurrentImg){camera.RetrieveBgrFrame().Save(imageFileName);}}catch (System.Exception ex){Microsoft.Practices.EnterpriseLibrary.Logging.Logger.Write(ex, Info, 0);}captureLock false;}}void Current_Exit(object sender, ExitEventArgs e){this.Dispose();}object mutCurrentImg new object();bool captureLock false;string imageFileName string.Empty;public void ImaggingCapture(string imageFileName){this.imageFileName imageFileName;this.captureLock true;}#region IDisposable Memberspublic void Dispose(){if (videoSource ! null)videoSource.Stop();Application.Current.Exit - new ExitEventHandler(Current_Exit);}#endregion[DllImport(Kernel32.dll, EntryPoint RtlMoveMemory)]private static extern void CopyMemory(IntPtr Destination, IntPtr Source, int Length);[DllImport(kernel32.dll, SetLastError true)]static extern IntPtr CreateFileMapping(IntPtr hFile, IntPtr lpFileMappingAttributes, uint flProtect, uint dwMaximumSizeHigh, uint dwMaximumSizeLow, string lpName);[DllImport(kernel32.dll, SetLastError true)]static extern IntPtr MapViewOfFile(IntPtr hFileMappingObject, uint dwDesiredAccess, uint dwFileOffsetHigh, uint dwFileOffsetLow, uint dwNumberOfBytesToMap);} 测试结果无异常但是发现比较占用CPU 10%左右内存 122M 左右线程数32. 感觉不太理想CPU占用太多我们把EmuguCV的Capture改为AForge.NEt的VideoCaptureDevice代码如下 public class CapPlayer : Image, IDisposable{private VideoCaptureDevice videoSource;private InteropBitmap bitmapSource;private IntPtr map;private IntPtr section;public CapPlayer(){Application.Current.Exit new ExitEventHandler(Current_Exit);this.Loaded new RoutedEventHandler(CapPlayer_Loaded);videoSource new VideoCaptureDevice(device:pnp:\\?\usb#vid_0ac8pid_305b#5ee8535402#{65e8773d-8f56-11d0-a3b9-00a0c9223196}\global); }void CapPlayer_Loaded(object sender, RoutedEventArgs e){videoSource.NewFrame new NewFrameEventHandler(videoSource_NewFrame);videoSource.Start();uint pcount (uint)(this.Width * this.Height * PixelFormats.Bgr32.BitsPerPixel / 8);section CreateFileMapping(new IntPtr(-1), IntPtr.Zero, 0x04, 0, pcount, null);map MapViewOfFile(section, 0xF001F, 0, 0, pcount);bitmapSource System.Windows.Interop.Imaging.CreateBitmapSourceFromMemorySection(section, (int)this.Width, (int)this.Height, PixelFormats.Bgr32,(int)(this.Width * PixelFormats.Bgr32.BitsPerPixel / 8), 0) as InteropBitmap;this.Source bitmapSource;}void Current_Exit(object sender, ExitEventArgs e){this.Dispose();}object mutCurrentImg new object();bool captureLock false;string imageFileName string.Empty;public void ImaggingCapture(string imageFileName){this.imageFileName imageFileName;this.captureLock true;}private void videoSource_NewFrame(object sender, NewFrameEventArgs eventArgs){//eventArgs.Frame.Save(stream, System.Drawing.Imaging.ImageFormat.Bmp);if (this.Dispatcher ! null){this.Dispatcher.Invoke(System.Windows.Threading.DispatcherPriority.Render, (SendOrPostCallback)delegate{if (map ! IntPtr.Zero){System.Drawing.Imaging.BitmapData bmpData eventArgs.Frame.LockBits(new System.Drawing.Rectangle(0, 0, (int)this.Width, (int)this.Height),System.Drawing.Imaging.ImageLockMode.ReadWrite, System.Drawing.Imaging.PixelFormat.Format32bppRgb);/* Get the pointer to the pixels */IntPtr pBmp bmpData.Scan0;int srcStride bmpData.Stride;int pSize srcStride * (int)this.Height;CopyMemory(map, pBmp, pSize);eventArgs.Frame.UnlockBits(bmpData);}if (bitmapSource ! null){bitmapSource.Invalidate();}}, null);}if (captureLock){try{lock (mutCurrentImg){eventArgs.Frame.Save(imageFileName);}}catch (System.Exception ex){}captureLock false;}}#region IDisposable Memberspublic void Dispose(){if (videoSource ! null)videoSource.SignalToStop();}#endregion[DllImport(Kernel32.dll, EntryPoint RtlMoveMemory)]private static extern void CopyMemory(IntPtr Destination, IntPtr Source, int Length);[DllImport(kernel32.dll, SetLastError true)]static extern IntPtr CreateFileMapping(IntPtr hFile, IntPtr lpFileMappingAttributes, uint flProtect, uint dwMaximumSizeHigh, uint dwMaximumSizeLow, string lpName);[DllImport(kernel32.dll, SetLastError true)]static extern IntPtr MapViewOfFile(IntPtr hFileMappingObject, uint dwDesiredAccess, uint dwFileOffsetHigh, uint dwFileOffsetLow, uint dwNumberOfBytesToMap);} 测试结果无异常但是发现占用CPU 1%左右内存 72M 左右线程数28. 是不是比较理想呢 CPU 内存 线程数 EmuguCV 10%左右 122M左右 32 Aforge.Net 1%左右 72M左右 28 我的电脑配置. 摄像头FrameRate 30Width 320 Height 240. 电脑型号 戴尔 Precision WorkStation T3400 Tower操作系统 Windows 7 旗舰版 32位 SP1 ( DirectX 11 )处理器 英特尔 酷睿2 双核 E8400 3.00GHz主板 戴尔 0HY553 (英特尔 X38/X48 Express 芯片组 - ICH9R)内存 4 GB ( 海力士 DDR2 800MHz / 金士顿 DDR2 667MHz )主硬盘 西数 WDC WD3200AAKS-75L9A0 ( 320 GB / 7200 转/分 )显卡 Nvidia Quadro NVS 290 ( 256 MB / Nvidia )显示器 戴尔 DELA04A DELL E170S ( 17.1 英寸 )光驱 飞利浦-建兴 DVD-ROM DH-16D5S DVD光驱声卡 Analog Devices AD1984 英特尔 82801I(ICH9) 高保真音频网卡 博通 BCM5754 NetXtreme Gigabit Ethernet / 戴尔 gdi32.dll 系统文件gdi32.dll是存放在Windows系统文件夹中的重要文件通常情况下是在安装操作系统过程中自动创建的对于系统正常运行来说至关重要。除非用户电脑被木马病毒、或是流氓软件篡改导致出现gdi32.dll丢失、缺失损坏等弹窗现象否则不建议用户对该类文件gdi32.dll进行随意的修改。 gdi32.dll是Windows GDI图形用户界面相关程序包含的函数用来绘制图像和显示文字。 posted on 2018-10-20 14:36 NET未来之路 阅读(...) 评论(...) 编辑 收藏 转载于:https://www.cnblogs.com/lonelyxmas/p/9821618.html
