News for hackers. Stuff that matters.

devmandan

Re:Show HN: Open source drone that can hold cargo on Wednesday March 11, 2026 @07:21PM (#47343874)
Thanks for letting me know. I'm not one to frequent this forum. I'll take a look at this for future submissions.
Re:Show HN: Open source drone that can hold cargo on Friday March 06, 2026 @10:59PM (#47284341)
Friend of mine open sourced his drone work. Thought it'd be cool to share here.
Re:QR Code Restoration Tool on Tuesday August 19, 2025 @03:07PM (#44955098)
It records where brushes are placed. Which allows for labeling of dataset in great detail. Which might lead to better tool in the future that is more automated.
Re:QR Code Restoration Tool on Tuesday August 19, 2025 @12:13PM (#44953224)
This is a continuation of an effort to collect a data set of broken QR codes and provide a way to fix broken QR codes. All the QR codes that are uploaded get saved and go into a data set that may eventually be published.
Re:Crowd Sourcing Broken QR Codes on Sunday May 11, 2025 @12:16PM (#43954778)
Depends on the situation. It also depends on how sentimental a person is for their data or information needed in a given situation.

If a cat shows up on your doorstep and now you got to figure out who owns the cat because you become concerned about it over time, what do you do if you can't scan the QR code on its collar?

Re:Crowd Sourcing Broken QR Codes on Sunday May 11, 2025 @12:01PM (#43954679)
Yup. Dark patterns exist with QR code hosting services. It's revolting.
Re:Crowd Sourcing Broken QR Codes on Sunday May 11, 2025 @11:23AM (#43954433)
I'll have to check this one out. Thanks for sharing.
Re:Crowd Sourcing Broken QR Codes on Sunday May 11, 2025 @11:20AM (#43954409)
This is exactly a baby-step in the right direction.

Basically, we put data into QR codes the same as hard drives. Why then are there so few data recovery tools for QR codes?

Re:Crowd Sourcing Broken QR Codes on Sunday May 11, 2025 @11:17AM (#43954393)
I'm less interested in the theory and am more interested in the practice. I own a printed copy of the 2015 version of the spec, but don't find the insights I get from it have much to do with its ability to scan as compared to taking my phone out and scanning a QR code does.

In practice, I mostly I find that the corners are the most finicky part. However, that is just my current opinion.

Re:Crowd Sourcing Broken QR Codes on Sunday May 11, 2025 @11:08AM (#43954327)
You are asking a good question. A question I don't have an answer to. I wondered the same. I never got an answer.
Re:Crowd Sourcing Broken QR Codes on Wednesday May 07, 2025 @07:24AM (#43914322)
A software tool should exist to repair QR codes. People could really benefit from it because QR codes are used everywhere.

I'd like to find a way to repair QR codes through software. However, that begins with collecting a bunch of broken and corrupted QR codes people stumble across and fixing them up by hand. This will help spot patterns in how they fail. So please help out by submitting your QR code that doesn't scan. Please don't create QR codes that don't scan just to submit them. Thank you! In the past I have fixed one QR code by hand and it is shown at the link.

Show HN: An Open Source Trail Camera Using Satellites and Upscaling Images

https://www.hackster.io/daniel-legut/a-trail-camera-using-satellites-and-ai-for-animal-research-28b019

This is a proof-of-concept for an open source camera that takes advantage of image upscaling to send less data. The model upscales images on the client side. It's far from perfect but works well enough to show off some ideas. As far as I know, there aren't any commercially available satellite game cameras you can just buy off the shelf easily. Well now you can just build one. Feel free to ask...

( Read More... | no comments | on HN )
I take issues with the approach. Anyone know anyone who wants dial gauges retrofitted? I got a way to do it that seems good enough.
Re:The Open Source Ruby on Rails SaaS Framework on Monday April 24, 2023 @10:49AM (#35688328)
Building from scratch wastes a ton of time and I'm a big fan of starting with some working parts and customizing from there. I think with what's going on with AI it makes sense to use python more because all the researchers love python and make examples available through python notebooks. Then your tech stack is less split amongst many languages and there is less complexity and you can hire developers for cheaper. Ruby devs are fairly pricey because they all working in silicon valley-esque well-funded startups. There is a Django boilerplate provider that's really good https://www.saaspegasus.com/. The guy behind it, Corey, is very responsive. All in all, it's probably not the worst thing to use Ruby, as long as you use less weakly-typed javascript :P