calibration

Today I read that there is a software called WinCalibra (scroll a bit down) which can take a text file with properties as input. This program can then optimize the input properties based on the output values of your algorithm. See this paper or the user documentation for more information (see link above; sadly doc is a zipped exe). Do you know other software which can do the same which runs under Linux? (preferable Open Source) EDIT : Since I need this for a java application: should I invest my research in java libraries like gaul or watchmaker ? The problem is that I don't want to roll out my

I have a python script that uses the calibratecamera2 method to calibrate a camera from a few views of a checker board. After a successful calibration I go after all original points and do some plots and compute again the re-projection error. My surprise is that the reprojection error computed by opencv and mine are a bit different. I found it strange. Am I computing it in a wrong way? obj_points = []# 3d point in real world space. List of arrays img_points = []# 2d points in image plane. List of arrays ... ret, camera_matrix, dist_coeffs, rvecs, tvecs = cv2.calibrateCamera(obj_points, img

I have calculated the intrinsic and extrinsic parameters of the camera with OpenCV. Now, I want to calculate world coordinates (x,y,z) from screen coordinates (u,v). How I do this? N.B. as I use the kinect, I already know the z coordinate. Any help is much appreciated. Thanks! First to understand how you calculate it, it would help you if you read some things about the pinhole camera model and simple perspective projection. For a quick glimpse, check this . I'll try to update with more. So, let's start by the opposite which describes how a camera works: project a 3d point in the world

I run into the problem where Matlab 2015b expands the labels of new Xticks when the x-axis gets bigger by using incomplete label, zeros, in the thread No Gap Next to Axis Label in Matlab? The dynamic expansion of incomplete labels of xticks is not possible because there is always cases of insufficient space but only one symbol is needed to mark half between two values. The situation is problematic with zeros because I have several calibration points and several systems where the extra zeros are errorprone. I would like to have there another symbol. Example code how to create those incomplete

I have calibrated 2 cameras with respect to some world coordinate system. I know rotation matrix and translation vector for each of them relative to the world frame. From these matrices how to calculate rotation matrix and translation vector of one camera with respect to the other?? Any help or suggestion please. Thanks! First convert your rotation matrix into a rotation vector. Now you have 2 3d vectors for each camera, call them A1,A2,B1,B2. You have all 4 of them with respect to some origin O. The rule you need is A relative to B = (A relative to O)- (B relative to O) Apply that rule to