/// <summary>
/// Get a copy of the data values as an array
/// </summary>
/// <param name="jagged">If true, a jagged array will returned. Otherwise it will return a regular array.</param>
/// <returns>a copy of the data values as an array</returns>
public Array GetData(bool jagged = true)
{
using (InputArray iaM = this.GetInputArray())
using (Mat m = iaM.GetMat())
{
return(m.GetData(jagged));
}
}
/// <summary>
/// Converts to NSImage.
/// </summary>
/// <returns>The NSImage.</returns>
public static NSImage ToNSImage(this IInputArray inputArray)
{
using (InputArray array = inputArray.GetInputArray())
using (Mat m = array.GetMat())
{
return(m.ToNSImage());
}
}
/// <summary>
/// Converts to UIImage.
/// </summary>
/// <returns>The UIImage</returns>
public static UIImage ToUIImage(this IInputArray inputArray)
{
using (InputArray ia = inputArray.GetInputArray())
using (Mat mat = ia.GetMat())
{
return(mat.ToUIImage());
}
}
/*
* public static Mat ToMat(this WriteableBitmap writeableBitmap)
* {
* Mat m = new Mat();
* writeableBitmap.ToArray(m);
* return m;
* }*/
public static WriteableBitmap ToWritableBitmap(this IInputArray array)
{
using (InputArray ia = array.GetInputArray())
{
Size size = ia.GetSize();
WriteableBitmap bmp = new WriteableBitmap(size.Width, size.Height);
byte[] buffer = new byte[bmp.PixelWidth * bmp.PixelHeight * 4];
GCHandle handle = GCHandle.Alloc(buffer, GCHandleType.Pinned);
using (Mat resultImage = new Mat(
new Size(bmp.PixelWidth, bmp.PixelHeight),
DepthType.Cv8U,
4,
handle.AddrOfPinnedObject(),
bmp.PixelWidth * 4))
{
int channels = ia.GetChannels();
switch (channels)
{
case 1:
CvInvoke.CvtColor(array, resultImage, ColorConversion.Gray2Bgra);
break;
case 3:
CvInvoke.CvtColor(array, resultImage, ColorConversion.Bgr2Bgra);
break;
case 4:
using (Mat m = ia.GetMat())
m.CopyTo(resultImage);
break;
default:
throw new NotImplementedException(String.Format(
"Conversion from {0} channel IInputArray to WritableBitmap is not supported",
channels));
}
}
handle.Free();
using (Stream resultStream = bmp.PixelBuffer.AsStream())
{
resultStream.Write(buffer, 0, buffer.Length);
}
return(bmp);
}
}
/// <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(this IInputArray image)
{
using (InputArray ia = image.GetInputArray())
using (Mat m = ia.GetMat())
using (System.Drawing.Bitmap source = m.ToBitmap())
{
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);
}
}
/// <summary>
/// Convert an input array to texture 2D
/// </summary>
/// <param name="image">The input image, if 3 channel, we assume it is Bgr, if 4 channels, we assume it is Bgra</param>
/// <param name="flipType"></param>
/// <param name="buffer">Optional buffer for the texture conversion, should be big enough to hold the image data. e.g. width*height*pixel_size</param>
/// <returns>The texture 2D</returns>
public static Texture2D InputArrayToTexture2D(IInputArray image, Emgu.CV.CvEnum.FlipType flipType = FlipType.Vertical, byte[] buffer = null)
{
using (InputArray iaImage = image.GetInputArray())
using (Mat m = iaImage.GetMat())
{
Size size = m.Size;
if (m.NumberOfChannels == 3 && m.Depth == DepthType.Cv8U)
{
Texture2D texture = new Texture2D(size.Width, size.Height, TextureFormat.RGB24, false);
byte[] data;
int bufferLength = size.Width * size.Height * 3;
if (buffer != null)
{
if (buffer.Length < bufferLength)
{
throw new ArgumentException(String.Format("Buffer size ({0}) is not big enough for the RBG24 texture, width * height * 3 = {1} is required.", buffer.Length, bufferLength));
}
data = buffer;
}
else
{
data = new byte[bufferLength];
}
GCHandle dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
using (
Image <Rgb, byte> rgb = new Image <Rgb, byte>(size.Width, size.Height, size.Width * 3,
dataHandle.AddrOfPinnedObject()))
{
rgb.ConvertFrom(m);
if (flipType != FlipType.None)
{
CvInvoke.Flip(rgb, rgb, flipType);
}
}
dataHandle.Free();
texture.LoadRawTextureData(data);
texture.Apply();
return(texture);
}
else //if (m.NumberOfChannels == 4 && m.Depth == DepthType.Cv8U)
{
Texture2D texture = new Texture2D(size.Width, size.Height, TextureFormat.RGBA32, false);
byte[] data;
int bufferLength = size.Width * size.Height * 4;
if (buffer != null)
{
if (buffer.Length < bufferLength)
{
throw new ArgumentException(String.Format("Buffer size ({0}) is not big enough for the RGBA32 texture, width * height * 4 = {1} is required.", buffer.Length, bufferLength));
}
data = buffer;
}
else
{
data = new byte[bufferLength];
}
GCHandle dataHandle = GCHandle.Alloc(data, GCHandleType.Pinned);
using (
Image <Rgba, byte> rgba = new Image <Rgba, byte>(size.Width, size.Height, size.Width * 4,
dataHandle.AddrOfPinnedObject()))
{
rgba.ConvertFrom(m);
if (flipType != FlipType.None)
{
CvInvoke.Flip(rgba, rgba, flipType);
}
}
dataHandle.Free();
texture.LoadRawTextureData(data);
texture.Apply();
return(texture);
}
}
}
