https://github.com/mint-lab/zero-shot-calibration

Zero-shot Camera Calibration [Lee, arXiv 2020]
https://github.com/mint-lab/zero-shot-calibration

camera-calibration

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Zero-shot Camera Calibration [Lee, arXiv 2020]

• Host: GitHub
• URL: https://github.com/mint-lab/zero-shot-calibration
• Owner: mint-lab
• Created: 2023-01-26T06:32:08.000Z (over 3 years ago)
• Default Branch: main
• Last Pushed: 2023-02-07T00:25:09.000Z (over 3 years ago)
• Last Synced: 2025-03-06T08:18:11.256Z (over 1 year ago)
• Topics: camera-calibration
• Language: Python
• Homepage:
• Size: 54.4 MB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

          
# zero-shot-calibration

The origin paper is from Jae-Yeong Lee, “Zero-Shot Calibration of Fisheye Cameras,”

arXiv, 2020, https://arxiv.org/abs/2011.14607

How to use this code is described below:

```shell

usage: zero_shot_calib.py [-h] [-W WIDTH] [-H HEIGHT] [-hf HFOV] [-vf VFOV] [-d DRAW]

find proper fisheye camera focal length with spec

options:

  -h, --help            show this help message and exit

  -W WIDTH, --Width WIDTH

                        Width information of image frame

  -H HEIGHT, --Height HEIGHT

                        Height information of image frame

  -hf HFOV, --Hfov HFOV

                        Horizontal field of view angle. It should be float

  -vf VFOV, --Vfov VFOV

                        Vertical field of view angle. It should be float

  -d DRAW, --draw DRAW  draw plot or not

```

example usage:

```shell

python3 zero_shot_calib.py -W 1920 -H 1440 -hf 122.0 -vf 94.0

```

Then it will show you the focal length in the terminal.

After that, if you want to undistort the image, you can use undistort.py

```shell

usage: undistort.py [-h] [--input_image INPUT_IMAGE] [--focal FOCAL] [--output_image OUTPUT_IMAGE]

options:

  -h, --help            show this help message and exit

  --input_image INPUT_IMAGE

  --focal FOCAL

  --output_image OUTPUT_IMAGE

```

example usage:

```shell

python3 undistort.py --input_image 20210812_084000_000_0400.png --output_image undistort.png --focal 1021.92

```

then it will save the undistorted image.

Example result: