www.emgu.com/wiki
result = val - this

Declaration Syntax
public Image<TColor, TDepth> SubR(
TColor val
)
Public Function SubR ( _
val As TColor _
) As Image(Of TColor, TDepth)
public:
Image<TColor, TDepth>^ SubR(
TColor val
)

Parameters
- val (TColor)
- the value which subtract this image

Return Value
val - this
Assembly:
Emgu.CV (Module: Emgu.CV) Version: 1.3.0.0 (1.3.0.0)