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Show HN: Owoa – Image watermarking resistant to camera capture

https://owoa.app
3•wodoshio•2h ago
My friends and I built Owoa to solve a specific problem in digital rights management: the "analog hole."

Traditional steganography and watermarking usually rely on LSB (Least Significant Bit) modifications or fragile metadata. These methods are instantly defeated the moment a user takes a physical photo of their monitor with a smartphone. The moiré patterns, sensor noise, and lens distortion destroy the digital signal.

Instead of hiding data in pixels, Owoa uses generative AI to create unique variants of an image by subtly modifying background elements (textures, foliage, unstructured patterns).

Because the "data" is now part of the actual visual composition of the image, it is much more robust. In our testing, the attribution survives:

Heavy JPEG compression and resizing.

Aggressive cropping.

Physical photos of 1080p/4K screens taken with mid-range smartphones.

We've just launched a Owoa Playground and are looking for technical feedback on the robustness of this approach compared to traditional robust watermarking.

We're giving 10 free credits to anyone who joins the waitlist to test the engine. I'd love to hear how you'd try to break this.

Link: https://owoa.app/

Show HN: VectorNest responsive web-based SVG editor

https://ekrsulov.github.io/vectornest/
21•ekrsulov•1h ago•2 comments

Show HN: A Unix environment in a single HTML file (420 KB)

https://shiro.computer/show
4•sagebird•7m ago•1 comments

Show HN: CEL by Example

https://celbyexample.com/
28•bufbuild•2h ago•5 comments

Show HN: AsteroidOS 2.0 – Nobody asked, we shipped anyway

https://asteroidos.org/news/2-0-release/index.html
434•moWerk•21h ago•61 comments

Show HN: Open Notes – Community Notes-style context for Discord

https://opennotes.ai/discord-bot
16•anateus•4d ago•3 comments

Show HN: Breadboard – A modern HyperCard for building web apps on the canvas

https://breadboards.io/
63•simquat•1d ago•7 comments

Show HN: TUI open-source Python tool for network discovery and port auditing

https://github.com/mennylevinski/network_scanner
2•mennylevinski•1h ago•0 comments

Show HN: Formally verified FPGA watchdog for AM broadcast in unmanned tunnels

https://github.com/Park07/amradio
2•anonymoosestdnt•1h ago•0 comments

Show HN: Opaal Visual multi-agent prompt designer for Claude Code and agentic AI

https://github.com/Agravak/opaal
2•Kinanhamwi•1h ago•0 comments

Show HN: Bubble sort on a Turing machine

https://github.com/purplejacket/bubble_sort_on_tm
11•purplejacket•4d ago•2 comments

Show HN: PolyMCP – MCP Tools, Autonomous Agents, and Orchestration

2•justvugg•1h ago•0 comments

Show HN: X402 Agent Starter Kit: AI agents that pay for their own APIs

https://gitlab.com/artificial-lab/x402-agent-starter
2•peiyaooo•1h ago•0 comments

Show HN: I wrote a technical history book on Lisp

https://berksoft.ca/gol/
232•cdegroot•1d ago•86 comments

Show HN: Codex skills as RE playbooks: unpacking and IOC extraction

https://www.joshuamckiddy.com/blog/ai-skills
3•dozercat•2h ago•1 comments

Show HN: Clawy, a companion device to track your Claude Code sessions

https://clawy.lol/
4•mrcv•2h ago•0 comments

Show HN: SentinelGate – Universal Firewall for AI Agents (Open Source, Go)

https://github.com/Sentinel-Gate/Sentinelgate
2•Sentinel-gate•2h ago•1 comments

Show HN: Owoa – Image watermarking resistant to camera capture

https://owoa.app
3•wodoshio•2h ago•0 comments

Show HN: Nedagram – Transfer Text Over Sound, when internet isn't available

https://nedagram.com/
3•shayanbahal•2h ago•3 comments

Show HN: I Made a Programming Language with Python Syntax, zero-copy and C-Speed

https://github.com/CrimsonDemon567PC/Mantis
6•CrimsonDemon567•6h ago•3 comments

Show HN: Refine.tools – 10 client-side career tools (Next.js, no DB)

https://www.refine.tools/
2•HarakiriGod•3h ago•3 comments

Show HN: Pg-typesafe – Strongly typed queries for PostgreSQL and TypeScript

https://github.com/n-e/pg-typesafe
64•n_e•22h ago•29 comments

Show HN: I taught LLMs to play Magic: The Gathering against each other

https://mage-bench.com/
109•GregorStocks•1d ago•79 comments

Show HN: I built a "Socratic" AI to stop my daughter from copy-pasting homework

https://thinkqurio.com/
23•qurio_dev•2d ago•18 comments

Show HN: SunnyFlight – Find cheap weekend flights to sunny destinations

https://sunnyflight.com/
2•coderai•3h ago•1 comments

Show HN: ReARM – Release-Level Supply Chain Evidence Platform

https://rearmhq.com/
3•taleodor•3h ago•0 comments

Show HN: Free printable micro-habit tracker inspired by Atomic Habits

https://atomichabits-calendar.com
9•winmonaye•9h ago•6 comments

Show HN: Glitchy camera – a circuit-bent camera simulator in the browser

https://glitchycam.com
166•elayabharath•2d ago•22 comments

Show HN: Box of Rain - Auto-Layouted ASCII Diagrams

https://github.com/switz/box-of-rain
23•switz•3d ago•13 comments

Show HN: 6cy – Experimental streaming archive format with per-block codecs

https://github.com/byte271/6cy
33•yihac1•23h ago•8 comments

Show HN: Benchmarking Apple Silicon unified mem for GPU-accelerated SQL analysis

https://github.com/sadopc/unified-db-2
3•sadopc•5h ago•1 comments