Could be 5x5..21x21. Correspondence using Sum of Absolute Difference (SAD):

Namespace: Emgu.CV.Structure
Assembly: Emgu.CV (in Emgu.CV.dll) Version: 2.0.1.0 (2.0.1.0)

Syntax

C#
public int SADWindowSize

Visual Basic (Declaration)
Public SADWindowSize As Integer

Visual C++
public: int SADWindowSize

See Also