Top "Camera-calibration" questions

In Computer Vision, camera-calibration is the process of finding the true parameters of the camera that produced a given photograph or video.

Does a smaller reprojection error always means better calibration?

During camera calibration, the usual advice is to use many images (>10) with variations in pose, depth, etc. However I …

opencv camera-calibration
OpenCV extrinsic camera from feature points

How do I retrieve the rotation matrix, the translation vector and maybe some scaling factors of each camera using OpenCV …

opencv computer-vision camera-calibration perspectivecamera
Re-distort points with camera intrinsics/extrinsics

Given a set of 2D points, how can I apply the opposite of undistortPoints? I have the camera intrinsics and …

opencv camera-calibration points distortion
How do I convert focal length in pixels to millimeter (mm)?

I am using OpenCV calibration method to determine the focal length of my endoscope. http://docs.opencv.org/doc/tutorials/…

opencv camera-calibration
How to find the focal length from camera matrix?

I have OpenCV code for calculating camera matrix and fixing distortion in image. Here is the part of the code …

c++ opencv camera-calibration camera-matrix
Python Opencv SolvePnP yields wrong translation vector

I am attempting to calibrate and find the location and rotation of a single virtual camera in Blender 3d using …

python opencv camera-calibration
Augmented Reality OpenGL+OpenCV

I am very new to OpenCV with a limited experience on OpenGL. I am willing to overlay a 3D object …

opengl opencv augmented-reality layer camera-calibration
iPhone/iPad front camera FOV

There are some measured results available for certain older ios devices but I'm not able to find FOV numbers for …

iphone ipad camera-calibration
How to use opencv bundle adjustment

I have calculated 5 camera matrices (c1, ... c5), camera matrices are calculated by placing a 3D object at 5 different positions and …

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OpenCV: solvePnP tvec units and axes directions

I'm trying to find the relative position of the camera to the chessboard (or the other way around) - I …

python opencv coordinate-systems camera-calibration