Apply rotation matrix to image

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Hi,
I am working with openCV api for java.
I have a images pair and want to apply the rotation matrix which I get from

stereoCalibrate()

and I want to use it. I have try for both images, right and left, with

warpPerspective()

But it doesnt work. I get a black image.

With < warpAffine() > I dont know how to use the rotation matrix because R is 3x3 but the input for warpaffine must be 2x3

Somebody has any idea

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1 answer

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answered Jul 20 '14

kovand11
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The R matrix transforms from Cam1 system, to Cam2 system. Its a 3D->3D transformation. The warpPerspective() expects an 2D Image -> 2D Image tranformation (in normalized space).

Luckily there is a function for that: http://docs.opencv.org/modules/calib3d/doc/camera_calibration_and_3d_reconstruction.html?highlight=findhomography#findhomography

Comments

Yes, you are right , either warpPerspective() or warpAffine() are transformation on images 2d -> 2d. May be do you know how to apply an infinitive homography to an image?, i.e the matrix Hinf=k1Rk2inv, where ki are the intrinsic camera matrix and R is the rotation matrix between cameras