private void LoadImage()
{
try
{
if (!System.IO.File.Exists(FFilename))
{
throw (new Exception("Given filename '" + FFilename + "' is not a file"));
}
FREE_IMAGE_FORMAT format = FreeImage.GetFileType(FFilename, 0);
FIBITMAP bmp = FreeImage.Load(format, FFilename, FREE_IMAGE_LOAD_FLAGS.JPEG_ACCURATE);
if (bmp.IsNull == true)
{
throw (new Exception("Couldn't load file"));
}
if (FreeImage.GetColorType(bmp) == FREE_IMAGE_COLOR_TYPE.FIC_PALETTE || FreeImage.GetBPP(bmp) < 8)
{
FIBITMAP converted;
//we need some conversion from strange pallettes
if (FreeImage.IsTransparent(bmp))
{
converted = FreeImage.ConvertTo32Bits(bmp);
}
else if (FreeImage.IsGreyscaleImage(bmp))
{
converted = FreeImage.ConvertTo8Bits(bmp);
}
else
{
converted = FreeImage.ConvertTo24Bits(bmp);
}
FreeImage.Unload(bmp);
bmp = converted;
}
//now we should have a fairly sensible 8, 24 or 32bit (uchar) image
//or a float / hdr image
uint width = FreeImage.GetWidth(bmp);
uint height = FreeImage.GetHeight(bmp);
uint bpp = FreeImage.GetBPP(bmp);
FREE_IMAGE_TYPE type = FreeImage.GetImageType(bmp);
TColorFormat CVFormat;
if (type == FREE_IMAGE_TYPE.FIT_BITMAP)
{
//standard image (8bbp)
uint channels = bpp / 8;
switch (channels)
{
case (1):
CVFormat = TColorFormat.L8;
break;
case (3):
CVFormat = TColorFormat.RGB8;
break;
case (4):
CVFormat = TColorFormat.RGBA8;
break;
default:
CVFormat = TColorFormat.UnInitialised;
break;
}
}
else
{
switch (type)
{
case (FREE_IMAGE_TYPE.FIT_INT16):
CVFormat = TColorFormat.L16;
break;
case (FREE_IMAGE_TYPE.FIT_FLOAT):
CVFormat = TColorFormat.L32F;
break;
case (FREE_IMAGE_TYPE.FIT_INT32):
CVFormat = TColorFormat.L32S;
break;
case (FREE_IMAGE_TYPE.FIT_RGBF):
CVFormat = TColorFormat.RGB32F;
break;
case (FREE_IMAGE_TYPE.FIT_RGBAF):
CVFormat = TColorFormat.RGBA32F;
break;
default:
CVFormat = TColorFormat.UnInitialised;
break;
}
}
if (CVFormat == TColorFormat.UnInitialised)
{
FreeImage.Unload(bmp);
throw (new Exception("VVVV.Nodes.OpenCV doesn't support this colour type \"" + type.ToString() + "\" yet. Please ask!"));
}
IntPtr data = FreeImage.GetBits(bmp);
FOutput.Image.Initialise(new Size((int)width, (int)height), CVFormat);
FOutput.Image.SetPixels(data);
ImageUtils.FlipImageVertical(FOutput.Image);
FOutput.Send();
FreeImage.Unload(bmp);
Status = "OK";
}
catch (Exception e)
{
Status = e.Message;
}
}