Emgu CV Library Documentation
cvCalibrationMatrixValues Method (calibMatr, imgWidth, imgHeight, apertureWidth, apertureHeight, fovx, fovy, focalLength, principalPoint, pixelAspectRatio)
NamespacesEmgu.CVCvInvokecvCalibrationMatrixValues(IntPtr, Int32, Int32, Double, Double, Double%, Double%, Double%, MCvPoint2D64f%, Double%)

www.emgu.com/wiki
computes various useful camera (sensor/lens) characteristics using the computed camera calibration matrix, image frame resolution in pixels and the physical aperture size
Declaration Syntax
C#Visual BasicVisual C++
public static void cvCalibrationMatrixValues(
	IntPtr calibMatr,
	int imgWidth,
	int imgHeight,
	double apertureWidth,
	double apertureHeight,
	ref double fovx,
	ref double fovy,
	ref double focalLength,
	ref MCvPoint2D64f principalPoint,
	ref double pixelAspectRatio
)
Public Shared Sub cvCalibrationMatrixValues ( _
	calibMatr As IntPtr, _
	imgWidth As Integer, _
	imgHeight As Integer, _
	apertureWidth As Double, _
	apertureHeight As Double, _
	ByRef fovx As Double, _
	ByRef fovy As Double, _
	ByRef focalLength As Double, _
	ByRef principalPoint As MCvPoint2D64f, _
	ByRef pixelAspectRatio As Double _
)
public:
static void cvCalibrationMatrixValues(
	IntPtr calibMatr, 
	int imgWidth, 
	int imgHeight, 
	double apertureWidth, 
	double apertureHeight, 
	double% fovx, 
	double% fovy, 
	double% focalLength, 
	MCvPoint2D64f% principalPoint, 
	double% pixelAspectRatio
)
Parameters
calibMatr (IntPtr)
The matrix of intrinsic parameters
imgWidth (Int32)
Image width in pixels
imgHeight (Int32)
Image height in pixels
apertureWidth (Double)
Aperture width in realworld units (optional input parameter). Set it to 0 if not used
apertureHeight (Double)
Aperture width in realworld units (optional input parameter). Set it to 0 if not used
fovx ( Double %)
Field of view angle in x direction in degrees
fovy ( Double %)
Field of view angle in y direction in degrees
focalLength ( Double %)
Focal length in realworld units
principalPoint ( MCvPoint2D64f %)
The principal point in realworld units
pixelAspectRatio ( Double %)
The pixel aspect ratio ~ fy/f

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