{Feature} Added devignetting demo

[nathanjzhao]

Addresses #99 and provides example of how to apply inverse vignette image to image in original .ipynb notebook.

[chpeng-fb]

Hi Nathan,

Thank you for creating the pull request. We are currently working on the pull request process.

In the mean time, vignetting mask is currently a general mask that is not calibrated per camera. So providing the capability as a tutorial could be misleading without understanding the risks.

Whats you thoughts on this? Does the devignetting work for your process without a problem?

Thanks
Cheng

[nathanjzhao]

Hi Cheng,

The devignetting works fully for my glasses without a problem, and the mask I utilized was based on the vignetting mask provided in #99, which I think was the mask emulating all front-facing cameras on Aria glasses. There could be further additions to the tutorial for accounting for various camera vignetting, but otherwise, I think the current code works unless the front-facing camera on Aria glasses changes.

Thanks,
Nathan

[AntonioMacaronio]

Is there a way to turn vignetting off when recording? I just spent a large amount of time filming data and I have come to believe I have fallen victim to the vignetting masks in my data, which has severely impacted my 3d reconstructions with gaussian splatting / neural radiance fields

[nathanjzhao]

Unfortunately, vignetting is naturally a result of the fisheye lens. This is why I wanted to create a demo for devignetting images/video frames. Feel free to look at my PR for a template for how to devignette the videos!

[nathanjzhao]

Hey, just wondering about the status of this PR -- Let me know if any edits are needed.

[facebook-github-bot]

@chpeng-fb has imported this pull request. If you are a Meta employee, you can view this diff on Phabricator.

[facebook-github-bot]

@chpeng-fb merged this pull request in ded9b03.