Emgu CV Library Documentation
InitUndistortMap Method (width, height, mapx, mapy)
NamespacesEmgu.CVIntrinsicCameraParametersInitUndistortMap(Int32, Int32, Matrix<(Of <(Single>)>)%, Matrix<(Of <(Single>)>)%)

www.emgu.com/wiki
Pre-computes the undistortion map - coordinates of the corresponding pixel in the distorted image for every pixel in the corrected image. Then, the map (together with input and output images) can be passed to cvRemap function.
Declaration Syntax
C#Visual BasicVisual C++
public void InitUndistortMap(
	int width,
	int height,
	out Matrix<float> mapx,
	out Matrix<float> mapy
)
Public Sub InitUndistortMap ( _
	width As Integer, _
	height As Integer, _
	<OutAttribute> ByRef mapx As Matrix(Of Single), _
	<OutAttribute> ByRef mapy As Matrix(Of Single) _
)
public:
void InitUndistortMap(
	int width, 
	int height, 
	[OutAttribute] Matrix<float>^% mapx, 
	[OutAttribute] Matrix<float>^% mapy
)
Parameters
width (Int32)
The width of the image
height (Int32)
The height of the image
mapx ( Matrix<(Of <(Single>)>) %)
The output array of x-coordinates of the map
mapy ( Matrix<(Of <(Single>)>) %)
The output array of y-coordinates of the map

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