Hacker News: jeremyscanvic

A History of the Early Years of AI at the University of Edinburgh

jeremyscanvic — Sat, 11 Apr 2026 12:42:53 +0000

Article URL: https://journals.sagepub.com/doi/epdf/10.1177/30504554261417567

Comments URL: https://news.ycombinator.com/item?id=47730099

Points: 2

# Comments: 0

New comment by jeremyscanvic in "What Category Theory Teaches Us About DataFrames"

jeremyscanvic — Fri, 03 Apr 2026 13:21:29 +0000

It's very insightful how they explain the difference between dataframes and SQL tables / standard relational structures!

New comment by jeremyscanvic in "404 Deno CEO not found"

jeremyscanvic — Sat, 21 Mar 2026 16:50:32 +0000

Like other commenters the tone of this post threw me off but I was really impressed by the design of the website. Congrats for building it, it shows your hard work and taste!

New comment by jeremyscanvic in "SSH Secret Menu"

jeremyscanvic — Wed, 11 Mar 2026 10:49:58 +0000

What I usually do when I have to read large man pages like bash(1) is I read them as PDFs:

man -Tpdf bash | zathura -

Replace zathura with any PDF viewer reading from stdin or just save the PDF. Hope that can be useful to someone!

New comment by jeremyscanvic in "Seed of Might color correction process (2023) [pdf]"

jeremyscanvic — Tue, 03 Mar 2026 09:09:51 +0000

For those interested you can also look up for opto-electronic transfer functions (OETF) and electro-optical transfer functions (EOTF).

New comment by jeremyscanvic in "Use the Mikado Method to do safe changes in a complex codebase"

jeremyscanvic — Mon, 02 Mar 2026 18:12:24 +0000

Is it possible in practice to control the side effects of making changes in a huge legacy code base?

Maybe the software crashes when you write 42 in some field and you're able to tell it's due to a missing division-by-zero check deep down in the code base. Your gut tells you you should add the check but who knows if something relies on this bug somehow, plus you've never heard of anyone having issues with values other than 42.

At this point you decide to hard code the behavior you want for the value 42 specifically. It's nasty and it only makes the code base more complex, but at least you're not breaking anything.

Anyone has experience of this mindset of embracing the mess?

New comment by jeremyscanvic in "HackMyClaw"

jeremyscanvic — Wed, 18 Feb 2026 10:26:41 +0000

How would you refer to it in French out of genuine curiosity?

New comment by jeremyscanvic in "It's all a blur"

jeremyscanvic — Wed, 11 Feb 2026 17:25:40 +0000

Most of them do but it's not mandatory and deblurring can be used [1]

[1] Cold Diffusion: Inverting Arbitrary Image Transforms Without Noise, Bansal et al., NeurIPS 2023

New comment by jeremyscanvic in "It's all a blur"

jeremyscanvic — Wed, 11 Feb 2026 17:22:01 +0000

You're absolutely right! Diffusion models basically invert noise (random Gaussian samples that you add independently to every pixel) but they can also work with blur instead of noise.

Generally when you're dealing with a blurry image you're gonna be able to reduce the strength of the blur up to a point but there's always some amount of information that's impossible to recover. At this point you have two choices, either you leave it a bit blurry and call it a day or you can introduce (hallucinate) information that's not there in the image. Diffusion models generate images by hallucinating information at every stage to have crisp images at the end but in many deblurring applications you prefer to stay faithful to what's actually there and you leave the tiny amount of blur left at the end.

New comment by jeremyscanvic in "It's all a blur"

jeremyscanvic — Wed, 11 Feb 2026 14:27:21 +0000

The missing piece of the puzzle is how to determine the blur kernel from the blurry image. There's a whole body of literature on that that's called blind deblurring.

For instance: https://deepinv.github.io/deepinv/auto_examples/blind-invers...

New comment by jeremyscanvic in "It's all a blur"

jeremyscanvic — Wed, 11 Feb 2026 13:36:11 +0000

Blur is perhaps surprisingly one of the degradations we know best how to undo. It's been studied extensively because there's just so many applications, for microscopes, telescopes, digital cameras. The usual tricks revolve around inverting blur kernels, and making educated guesses about what the blur kernel and underlying image might look like. My advisors and I were even able to train deep neural networks using only blurry images using a really mild assumption of approximate scale-invariance at the training dataset level [1].

[1] https://ieeexplore.ieee.org/document/11370202

New comment by jeremyscanvic in "Iterative image reconstruction using random cubic bézier strokes"

jeremyscanvic — Mon, 19 Jan 2026 20:30:56 +0000

Thanks!

New comment by jeremyscanvic in "Iterative image reconstruction using random cubic bézier strokes"

jeremyscanvic — Mon, 19 Jan 2026 19:32:28 +0000

Really cool! Any specific reason for the choice of Oklab instead of say HSL/HSV?

New comment by jeremyscanvic in "Electronic nose for indoor mold detection and identification"

jeremyscanvic — Wed, 07 Jan 2026 12:16:34 +0000

Any reference you can share on this? I'm genuinely curious speaking as a PhD student in image processing for computer vision

New comment by jeremyscanvic in "What an unprocessed photo looks like"

jeremyscanvic — Mon, 29 Dec 2025 18:47:43 +0000

Something that's important to bear in mind when displaying raw images like that is it's not so much that raw images need to be processed to look good intrinsically. It's much more that they need to be processed to be in the form displays expect. Gamma correction is only needed because displays expect gamma corrected images and they automatically try to undo the correction.

New comment by jeremyscanvic in "High school student discovers 1.5M potential new astronomical objects"

jeremyscanvic — Fri, 26 Dec 2025 15:38:22 +0000

Do you have any evidence to back this up? I'm asking out of genuine curiosity

New comment by jeremyscanvic in "Ask HN: What did you read in 2025?"

jeremyscanvic — Fri, 26 Dec 2025 13:23:55 +0000

I read Sad Tiger by Neige Sinno. Really unsettling but definitely worth reading.

DeepInverse Joins the PyTorch Ecosystem

jeremyscanvic — Wed, 05 Nov 2025 17:47:28 +0000

Article URL: https://pytorch.org/blog/deepinverse-joins-pytorch-ecosystem/

Comments URL: https://news.ycombinator.com/item?id=45825692

Points: 2

# Comments: 0

New comment by jeremyscanvic in "KaTeX – The fastest math typesetting library for the web"

jeremyscanvic — Mon, 03 Nov 2025 13:27:19 +0000

I would assume you pretty much get that out of the box given Typst compiles to HTML natively?

Gamma Correct Blurring (2015)

jeremyscanvic — Sun, 02 Nov 2025 12:19:48 +0000

Article URL: https://iquilezles.org/articles/gamma/

Comments URL: https://news.ycombinator.com/item?id=45789781

Points: 1

# Comments: 0