Can I get Essential Matrix from Fundamental matrix with few matching keypoints, but without intrinsic parameters?
Question
Firstly I guess this question might be duplicated, but I couldn't find it.
Question. It's actually in the title.
- Can I get Essential Matrix from Fundamental matrix with few matching keypoints, but without intrinsic parameters?
Situation. I am trying to find Essential matrix. I use my phone camera to take photos, and then extract keypoints using SIFT(or ORB). I have 2 images of an object and it's matching points. I could get F, Fundamental Matrix but I have no idea how to get Essential Matrix from this. I don't have camera intrinsic parameters, such as Fx, Fy, Cx, Cy. I am stuck to this situation. I googled but couldn't get answers. Let me know if it's duplicated then I'd delete this.
PLUS: I also don't have camera coordinates or world coordinates.
1 answers
solution1
0 2022-01-13 09:35:16
No you can't, you need to know the metric size of the pixel and the focal because essential matrix is in the real world.
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