pengsongyou/calibrationwizard

[ICCV'19] Calibration Wizard: A Guidance System for Camera Calibration Based on Modelling Geometric and Corner Uncertainty

calibrationwizard's Issues

When available?

Where are codes?
When are they available?

Why the autocorrelation matrix is an estimate of the inverse of the covariance matrix of the corner position?

Hi @pengsongyou , amazing work :) Thanks for open-sourcing it!

If I may, I have a question regarding the following paragraph of the paper:

Consider a corner point extracted in an image; the uncertainty of its position can be estimated by computing the autocorrelation matrix C for a window of a given size around the point (see for instance [5]).
Concretely, C is an estimate of the inverse of the covariance matrix of the corner position.

I am struggling to understand this. Given that the autocorrelation matrix can be computed as explained e.g. in this tutorial). I don't see where this result of being the inverse covariance matrix comes from.

I would highly appreciate if you could shed some light on this,
Thanks in advance!

How to do Synthetic evaluation?

In the 'Result and Evaluation' section of the paper, it said:

 To assess the proposed system, we simulate the process of camera calibration   
with pre-defined intrinsic parameters, with Matlab.  

But how to simulate the process of camera calibration in Matlab? Which Toolbox do you use?

Thanks.

out of border & cpp version

Firstly, thanks for your great work!

background:
When I use Opencv camera calibration node to calibrate my camera, I found that the intrinsic's center is different in each time, about >20px error, So I guess whether it is because the chessboard position can influence the result, I found your paper and I want to use this method to solve my question.

So the first question is When I use matlab calculate the next position of chessboard, I found that the pose is out of border.

and is there any method to display a pose in the range of image? (I modified the image size as 1280x720 to replace the origin size of 640x480)

The second question is whether could you provide the cplusplus version of estimate-pose module? it is a great work but has some difficult for using , bacuse it's matlab code. (although I have succeed run the code on ubuntu 16.04, but there is also some matlab functions error)

Thanks for your great work again!

Both width and height of the pattern should have bigger than 2 in function cvFindChessboardCorners

I changed the width and height of chessboard in 'config/wizard.xml'. But when I chose the 0(initial images capture) mode, this code was aborted. Could you give me some help?