Camera Calibration does not work.

Question

ASDM 2019-8-20

2
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/476810-camera-calibration-does-not-work

回答： Ricardo Guzmán 2021-8-19

Hello,

I'm just trying to calibrate a camera, sticking to every searchable guide, but no matter what I do, it just does not work. Maybe someone of you experts has an idea here.

Below is my approach:

I use the Camera Calibration Tool, the camera I use is an iPhone 7, the Checkerboard is printed on DIN-A3, 7x10 Square and each square is 40mm by 40mm.

The checkerboard was printed on 300g paper with an inkjet printer and then stuck to a stiff and flat wooden plate with double-sided tape.

I blocked the autofocus when taking pictures.

I take about 30-40 pictures, feed them into the program and then remove so many, until the best 10-20 left.

With the calculation of 2 coefficients the result is not satisfactory, but with 3 coefficients the result makes even less sense.

Does anyone have an idea what could be a possible source of error?

I would be very happy to receive an answer.

Best regards

ASDM

Camera Setting

Window

Three Coefficients Radial Distortion