OpenCV Q&A Forum - RSS feedhttp://answers.opencv.org/questions/OpenCV answersenCopyright <a href="http://www.opencv.org">OpenCV foundation</a>, 2012-2018.Sun, 02 Aug 2020 12:28:00 -0500Coordinate frame transformation from NED to OpenCV convention, and the Pinhole Camera Modelhttp://answers.opencv.org/question/233204/coordinate-frame-transformation-from-ned-to-opencv-convention-and-the-pinhole-camera-model/ Hello,
I'm working on an SFM module where I have camera coordinates wrt a world coordinate system (in NED). I have the calibrated camera intrinsics matrix, and with the R,T of the camera wrt world, I compute the Projection matrix (intrinscs matrix * R|T) for each image, and camera position. However, I'm not sure if this Projection matrix is right since the R|T is in NED, and openCV uses a different convention.I'm trying to use the CV::SFM::triangulatePoints, but I'm not getting consistent results.
How will this affect the projection matrix, and is the conversion of the poses to the OpenCV frame necessary?
leafdetSun, 02 Aug 2020 12:28:00 -0500http://answers.opencv.org/question/233204/3D reconstruction (SFM) with multi-lens camera system (instead of pinhole camera model)http://answers.opencv.org/question/173406/3d-reconstruction-sfm-with-multi-lens-camera-system-instead-of-pinhole-camera-model/3D reconstruction (especially SFM algorithms) are often related with pinhole camera models.
The state-of-the-art of these SFM techniques is to look where the rays of 2D-3D correspondences in two different cameras intersect in object space.
This enforces that the camera model is a pinhole model (where the 2D-3D ray is just a straight line).
But often in real world there are multiple lens system used, where you can't really figure out the ray of 2D-3D correspondence.
**My question is:** *How does the SFM technique works with such multiple lens camera systems?*mirnyyFri, 01 Sep 2017 06:24:13 -0500http://answers.opencv.org/question/173406/