Bitmap to image conversion shows a white image only

Question

I do have some problems to display an image (uEye-Cam) in a wpf-Image form. The displayed image is completely white. Below is my used code:

//Get Cam Bitmap Image var cam = new uEye.Camera(); cam.Init(); cam.Memory.Allocate(); cam.Acquisition.Capture(uEye.Defines.DeviceParameter.DontWait); Int32 s32MemId; cam.Memory.GetActive(out s32MemId); cam.Memory.Lock(s32MemId); Bitmap bitmap; cam.Memory.ToBitmap(s32MemId, out bitmap); //WPF Image control var image1 = new System.Windows.Controls.Image(); //convert System.Drawing.Image to WPF image var bmp = new System.Drawing.Bitmap(bitmap); IntPtr hBitmap = bmp.GetHbitmap(); System.Windows.Media.ImageSource wpfBitmap = System.Windows.Interop.Imaging.CreateBitmapSourceFromHBitmap(hBitmap, IntPtr.Zero, Int32Rect.Empty, BitmapSizeOptions.FromEmptyOptions()); image1.Source = wpfBitmap; image1.Stretch = System.Windows.Media.Stretch.UniformToFill; image1.Visibility = Visibility.Visible; DeleteObject(hBitmap);

Is there anything wrong with the image1 properties maybe or..?

Thanks

WPF bitmap to image conversion shows a black image only

possible duplicate of WPF bitmap to image conversion shows a black image only — Clemens
– Clemens, Commented Apr 28, 2014 at 7:17

Community · Accepted Answer · 2017-05-23 12:25:31Z

I've had good results with converting every new frame to a bitmap as in the question:

Bitmap bmp; cam.Memory.ToBitmap(s32MemId, out bmp);

And then converting this to a BitmapImage using:

BitmapImage bitmapImage = null; using (System.IO.MemoryStream memory = new System.IO.MemoryStream()) { bitmapImage = new BitmapImage(); bmp.Save(memory, System.Drawing.Imaging.ImageFormat.Bmp); memory.Position = 0; bitmapImage.BeginInit(); bitmapImage.StreamSource = memory; bitmapImage.CacheOption = BitmapCacheOption.OnLoad; bitmapImage.EndInit(); }

And then locking and freezing (as in How do you pass a BitmapImage from a background thread to the UI thread in WPF?) the BitmapImage to set it as the source of the Image control using:

Object tempLock = new Object(); BitmapImage lastBitmapImage = null; lock (tempLock) { lastBitmapImage = bitmapImage.Clone(); } lastBitmapImage.Freeze();

Finally, the BitmapImage is set as the souce of the Image control with:

this.Dispatcher.Invoke(new Action(() => { imageDisplay.Source = lastBitmapImage; }));

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