Show HN: GPU Accelerated Desktop Screen Flash Filter (Photosensitive Epilepsy)

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FlashFilter - Flash Filter for Photosensitive Epilepsy

For photosensitive safety<br>Stop flashing content<br>before it reaches your eyes.<br>FlashFilter is a flash filter for photosensitive epilepsy. It lowers the<br>risk of seizures and migraines set off by flashing on-screen content, in<br>games, video, and across the web. Built for people with photosensitive<br>epilepsy or sensitivity to strobing light, it runs quietly in the<br>background and softens dangerous flashes before they reach you.<br>Get the beta free Latest updates<br>Free public beta. Opens June 30, free through August 25. No card required.

Protection The only thing that changes is the danger<br>FlashFilter watches everything on your screen and softens harsh<br>flashes and sudden brightness spikes in place. There is no dark overlay<br>and no colour tint over your whole display. The flash is what gets<br>smoothed away, so the rest of the picture looks just as it should.

Performance Light on your system<br>FlashFilter runs on your GPU and does its work in a fraction of a<br>frame. It will not slow your computer down, lag your games, or drain<br>your battery, even on the fastest and smoothest screens. It stays out<br>of your way.

Compatibility Every desktop<br>Works on Windows, Mac, and Linux. It uses each system's native<br>graphics stack and runs smoothly on all three. Install it on every<br>device you use.

Privacy Your frames, your business<br>All filtering happens right on your own computer. What is on your<br>screen stays with you and never leaves your machine. We do not track how<br>you use FlashFilter. The only account detail we need is the sign-in that<br>carries your licence.

Questions Flash filtering for photosensitive epilepsy, explained<br>What FlashFilter does, who it is for, and how the screen filter protects<br>against flashing and strobing content.

What is FlashFilter? FlashFilter is a screen filter that primarily aims to remove flashing from a real time video stream. It works across games, video, and the whole web, without a dark overlay or a colour tint over your display.<br>Who is FlashFilter for? It is built for people with photosensitive epilepsy or a sensitivity to strobing and flashing light, and for anyone who gets migraines or discomfort from harsh on-screen flashes. If flashing content on a screen is a problem for you, FlashFilter is meant to help.<br>How does the epilepsy screen filter work? FlashFilter runs as a GPU compositing layer between your desktop and your display. It analyses every frame for flashing and depending on your preferences will dampen or remove it real time.<br>Does the photosensitive flash filter work in games and video? Yes. FlashFilter filters everything on your screen - games, streaming and local video, browsers, and any other application - because it works on the final composited image rather than hooking into individual apps.<br>Which operating systems does FlashFilter support? FlashFilter runs on Windows, macOS, and Linux, using each system's native GPU graphics stack (DirectX 12, Metal, and Vulkan respectively). Linux support is Wayland only and varies depending on the compositor, the constraint on the compositor is that it must be able to run nested (have a Wayland backend for output which uses zwp_linux_dmabuf_v1).<br>Will it slow down my computer? Practically no. Filtering runs on your GPU and completes in a fraction of a frame, so it will not lag games or significantly drain battery anymore than any other background process. That being said, we provide a few different algorithms configuration options which generally trade off performance and filtering quality (level of artifacting and resolution).<br>Is my screen data private? Yes. All filtering happens locally on your own computer. What is on your screen never leaves your machine, and FlashFilter does not track how you use it.<br>Is FlashFilter a medical device? No. FlashFilter is not a medical device and is not a substitute for medical advice. It reduces flashing that may trigger symptoms but cannot guarantee that all of it is removed.

Public beta Try it free from June 30<br>The first public beta opens on June 30 and is free to use through<br>August 25. No card is required. After the beta, FlashFilter continues as a<br>subscription. Read the latest update for the full<br>details.<br>Get the beta free [email protected] FlashFilter is not a medical device and is not a<br>substitute for medical advice. It reduces flashing that may trigger<br>symptoms but cannot guarantee that all of it is removed. Learn more about photosensitive<br>epilepsy and the WCAG<br>flash thresholds that inform how flashing content is measured.

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