how i can find fundamental matrix

i used sift algorithm to find features and for matching.now i want to find fundamental matrix how i can do it?

[Merged information from duplicate question]

i am interested to reconstruct 3d image from two stereo images.i dont know the camera parameters so i to find camera parameters i want to find fundamental matrix.to find this first i found the matching points now i want these matching points in the form of an 3xN array to find fundamental matrix.please help me out...

Answer 1

I have no idea what you're asking. What is a fundamental matrix?

Answer 2

i have two stereo images i want to reconstruct 3d image from these two stereo images.i want to do camera calibration for this.i took uncalibrated images so i want to obtain camera parameters for reconstruction.so i want to find fundamental matrix for this purpose..

What is a fundamental matrix?

It's a concept from computer vision

http://en.wikipedia.org/wiki/Fundamental_matrix_(computer_vision)

Answer 3

This might be applicable, though I haven't used it

http://www.mathworks.com/matlabcentral/fileexchange/27541-fundamental-matrix-computation

Answer 4

Have you seen the MATLAB Central submission highlighted in today's MATLAB Digest?

http://www.mathworks.com/matlabcentral/fileexchange/28522-stereo-matching?s_v1=48846382_1-1Q4UM3

" FAST MATLAB STEREO MATCHING ALGORITHM (SAD). This function performs the computationally expensive step of matching two rectified and undistorted stereo images. The output is ...."

Still requires camera pre-calibration, though...