For every point in one of the two images of stereo-pair the function cvComputeCorrespondEpilines finds equation of a line that contains the corresponding point (i.e. projection of the same 3D point) in the other image. Each line is encoded by a vector of 3 elements l=[a,b,c]^T, so that: l^T*[x, y, 1]^T=0, or a*x + b*y + c = 0 From the fundamental matrix definition (see cvFindFundamentalMatrix discussion), line l2 for a point p1 in the first image (which_image=1) can be computed as: l2=F*p1 and the line l1 for a point p2 in the second image (which_image=1) can be computed as: l1=F^T*p2Line coefficients are defined up to a scale. They are normalized (a2+b2=1) are stored into correspondent_lines

public static void cvComputeCorrespondEpilines(
	IntPtr points,
	int whichImage,
	IntPtr fundamentalMatrix,
	IntPtr correspondentLines
)

Public Shared Sub cvComputeCorrespondEpilines ( _
	points As IntPtr, _
	whichImage As Integer, _
	fundamentalMatrix As IntPtr, _
	correspondentLines As IntPtr _
)

public:
static void cvComputeCorrespondEpilines(
	IntPtr points, 
	int whichImage, 
	IntPtr fundamentalMatrix, 
	IntPtr correspondentLines
)