http://www.emgu.com
Could be 5x5..21x21. Correspondence using Sum of Absolute Difference (SAD):

Namespace: Emgu.CV.Structure
Assembly: Emgu.CV (in Emgu.CV.dll) Version: 2.4.2.1777 (2.4.2.1777)

Syntax

C#
public int SADWindowSize
Visual Basic
Public SADWindowSize As Integer
Visual C++
public:
int SADWindowSize

See Also