I'm trying to measure objects with sparse reconstruction cloud map in COLMAP. Without inputting camera poses (translation and rotation matrix as quaternion) for images in meters, I will not be able to make any measurements from sparse model after reconstruction. Since COLMAP takes arbitrary units for its extrinsic parameter generation, the measurements made on the cloud map will not have units. But I'm trying to make measurements in meters with it. I want to use mobile phone images as input, so the camera Intrinsics are already available from exif. Is it possible to get the poses of the camera for a set of images using OpenCV? If not, are there any other method of getting the camera pose?
How to get camera pose (camera extrinsic) for a set of images in absolute units using opencv?
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