/// <summary>
/// Gets or sets image channel.
/// Channel size must be the same as image size.
/// </summary>
/// <param name="channelIdx">Index of an channel to get or replace.</param>
/// <returns>Image channel.</returns>
IImage IImage.this[int channelIdx]
{
get
{
return(ChannelSplitter.SplitChannels(this, channelIdx)[0]);
}
set
{
ChannelMerger.MergeChannels(new IImage[] { value }, this, channelIdx);
}
}
private unsafe static Array toArray(IImage image)
{
Array arr = Array.CreateInstance(image.ColorInfo.ChannelType, image.ColorInfo.NumberOfChannels, image.Height, image.Width);
var channelColor = ColorInfo.GetInfo(typeof(Gray), image.ColorInfo.ChannelType);
GCHandle arrHandle = GCHandle.Alloc(arr, GCHandleType.Pinned);
int arrDimStride = image.Width * channelColor.Size;
IImage[] channels = (image.ColorInfo.NumberOfChannels == 1) ? new IImage[] { image } : ChannelSplitter.SplitChannels(image);
for (int i = 0; i < channels.Length; i++)
{
int dimOffset = i * arrDimStride * image.Height;
IntPtr dimPtr = (IntPtr)((byte *)arrHandle.AddrOfPinnedObject() + dimOffset);
var channelImg = channels[i];
HelperMethods.CopyImage(channelImg.ImageData, dimPtr, channelImg.Stride, arrDimStride, arrDimStride, image.Height);
}
arrHandle.Free();
return(arr);
}