public void Show(object value)
{
using (var inputImage = (IplImage)value)
{
visualizerImage = IplImageHelper.EnsureImageFormat(visualizerImage, inputImage.Size, inputImage.Depth, inputImage.Channels);
CV.Copy(inputImage, visualizerImage);
}
value = null;
}
public void Update(IplImage image)
{
if (image == null)
{
throw new ArgumentNullException("image");
}
if (image.Depth != IplDepth.U8)
{
double min, max;
Point minLoc, maxLoc;
normalizedImage = IplImageHelper.EnsureImageFormat(normalizedImage, image.Size, IplDepth.U8, image.Channels);
using (var buffer = image.Reshape(1, 0))
{
CV.MinMaxLoc(buffer, out min, out max, out minLoc, out maxLoc);
}
var range = max - min;
var scale = range > 0 ? 255.0 / range : 0;
var shift = range > 0 ? -min : 0;
CV.ConvertScale(image, normalizedImage, scale, shift * scale);
image = normalizedImage;
}
if (!nonPowerOfTwo || image.Width > maxTextureSize || image.Height > maxTextureSize)
{
var textureWidth = Math.Min(maxTextureSize, NearestPowerOfTwo(image.Width));
var textureHeight = Math.Min(maxTextureSize, NearestPowerOfTwo(image.Height));
textureImage = IplImageHelper.EnsureImageFormat(textureImage, new Size(textureWidth, textureHeight), image.Depth, image.Channels);
CV.Resize(image, textureImage, SubPixelInterpolation.Linear);
image = textureImage;
}
OpenTK.Graphics.OpenGL.PixelFormat pixelFormat;
switch (image.Channels)
{
case 1: pixelFormat = OpenTK.Graphics.OpenGL.PixelFormat.Luminance; break;
case 2: pixelFormat = OpenTK.Graphics.OpenGL.PixelFormat.Rg; break;
case 3: pixelFormat = OpenTK.Graphics.OpenGL.PixelFormat.Bgr; break;
case 4: pixelFormat = OpenTK.Graphics.OpenGL.PixelFormat.Bgra; break;
default: throw new ArgumentException("Image has an unsupported number of channels.", "image");
}
GL.BindTexture(TextureTarget.Texture2D, texture);
GL.PixelStore(PixelStoreParameter.UnpackRowLength, image.WidthStep / image.Channels);
GL.TexImage2D(TextureTarget.Texture2D, 0, PixelInternalFormat.Rgba, image.Width, image.Height, 0, pixelFormat, PixelType.UnsignedByte, image.ImageData);
}