Emgu CV Library Documentation
Item Property (channel)
NamespacesEmgu.CVImage<(Of <(TColor, TDepth>)>)Item[([(Int32])])

www.emgu.com/wiki
Get or Set the specific channel of the current image. For Get operation, a copy of the specific channel is returned. For Set operation, the specific channel is copied to this image.
Declaration Syntax
C#Visual BasicVisual C++
public Image<Gray, TDepth> this[
	int channel
] { get; set; }
Public Default Property Item ( _
	channel As Integer _
) As Image(Of Gray, TDepth)
public:
property Image<Gray, TDepth>^ default[int channel] {
	Image<Gray, TDepth>^ get (int channel);
	void set (int channel, Image<Gray, TDepth>^ value);
}
Parameters
channel (Int32)
The channel to get from the current image, zero based index
Return Value
The specific channel of the current image

Assembly: Emgu.CV (Module: Emgu.CV) Version: 1.5.0.0 (1.5.0.0)