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Questions tagged [fundamental-matrix]

16 questions
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Is there a minimal, complete, working example of structure from motion/3d reconstruction?

Like the question says, I am looking for a complete, minimal, working example of the structure from motion (aka 3d reconstruction) pipeline. Right away let me say I do not have the camera parameters. I do not know focal length or camera intrinsics.…
john k
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What do I do with the fundamental matrix?

I am trying to reconstruct a 3d shape from multiple 2d images. I have calculated a fundamental matrix, but now I don't know what to do with it. I am finding multiple conflicting answers on stack overflow and academic papers. For example, Here says…
john k
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8-point algorithm for computing the fundamental matrix with more than 8 matches

Does the 8 point algorithm have to be computed with only 8 matches? Say I have n > 8 matches. When trying to solve the equations system in order to compute the fundamental matrix F, do I have to select a subset of 8 points for building A or could I…
thAngryUnicorn
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How can i get Essential matrix from Rotation matrix for drawing epipolar line?

Goal Ultimately,i want to draw epipolar line on right image. Question If i know points on left image and rotation matrix between left camera and right camera, how can i get Essential matrix for drawing epipolar line on right image? (so, i don't use…
Slava
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Finding correspondence using epipolar geometry and orb (computer vision strero)

I am working on finding stereo correspondences using epipolar geometry. I am using p^T * F p'= 0* equality and I know Fundamental Mat's values. Basically , I have 2 rectified images and I am trying to calculate the matches of a point I took from…
Burak AKBAŞ
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Epipolar lines don't go through the point in the same image

I have the following code to calculate and present epipolar lines by multiplying the given points by the fundamental matrix: # This should open a new figure window outside of jupyter notebook %matplotlib qt imL = cv2.imread('Left.tif',…
Inbaral
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Estimating Camera Focal Length for Epipolar based Pose Recovery

The title is a bit of a mouthful but basically I have two photographs (I am initializing a scene graph) and I want to recover the relative pose of the second photo. I know how to recover the pose from the Essential Matrix but this requires knowledge…
Steven Alsheimer
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How to compute fundamental matrix for 2D images?

I'm trying to find the fundamental matrix between two images. The points of correspondence in my images are given as follows - pts1_list = [ [224.95256042, 321.64755249], [280.72879028, 296.15835571], [302.34194946, 364.82437134], …
blazingcannon
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How to draw eplines on stereo images using `cv.computeCorrespondEpilines` with Fundamental Matrix

I am following this tutorial and trying to draw eplines on a stereo image pair using a fundamental matrix (Fmat) I obtained with cv2.stereoCalibrate. I am trying to use my imported Fmat.npy instead of cv.findFundamentalMat and cv.FM_RANSAC. However,…
a11s
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OpenCV to find Essential Matrix from multiple image pairs from the same stereo pair

If we have multiple image pairs and the feature correspondences from the same stereo setup , how can we leverage all of them to find the essential matrix. The openCV cv2.findEssentialMat function takes points1 and points2 arguments that belong to…
Sandeep Menon
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Estimating relative rotation between two uncalibrated cameras from the fundamental matrix

I have two images of the same object that were taken from different positions and an uncalibrated camera. I want to treat these images pair as stereo pairs. Then I can estimate a fundamental matrix, without any knowledge of the scene. I want to know…
Yulia Grinblat
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Why does the order of the points matter when checking corresponding points with the fundamental matrix?

Why does the order of the points matter when calculating the correspondence between points for the fundamental matrix equation? Here I don't understand why switching the points does not produce the same answer My guess is that is has to do with…
DeadPixel
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How to find fundamental matrices for a dataset?

I want to compare different algorithms in openCV for computation of fundamental matrix. I have used the code below to find a fundamental matrix for a corresponding pair of images. Is there a way to do the same thing for a dataset, without using a…
Roxanya
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Can the baseline between two cameras be determined from an uncalibrated rectified image pair?

Currently, I am working at a short project about stereo-vision. I'm trying to create depth maps of a scenery. For this, I use my phone from to view points and use the following code/workflow provided by Matlab :…
raymond
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Stable Translation from essential decomposition

When implementing monocular SLAM or Structure from Motion using single camera, translation can be estimated up to unknown scale. It is proven that without any other external information, this scale can not be determined. However, my question: How to…
Humam Helfawi
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