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About
ScreenBloom is a PC/Mac application that grabs the average color of your screen and sends that value to your Hue lights.
ScreenBloom approximates the effect of the Philips Ambilight TV line on any computer screen.

Designed to work with the limitations of Hue bulbs, ScreenBloom's effect is subtler and less immediate than Ambilight but still plenty responsive.
A snapshot of your current screen is converted into a list of pixels and each pixel's RGB (red, green, blue) values are added to 3 running totals. The totals are averaged to produce your screen's current average color.
The computed RGB average is gamma corrected, converted to a CIE value used by Hue, and a command is sent to update the lights.
Pixels that are too dark or too light which wash out or dim the final average are counted simultaneously. Those totals are used to produce a scaled brightness value which can raise and lower your bulbs' brightness accordingly.
Media
Videos Note: many subtler color changes are hard to see in compressed videos
GIFs
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The ScreenBloom UI
  • Save Setting Presets
  • Individual Bulb Settings
  • Choose Your Display
  • bootstrap carousel
  • Set Min/Max Brightness
Version 2.2 February 2017 Release Notes
- System Tray (Win). Quick access to basic ScreenBloom functionality through the Windows system tray. - Saturation Value. Increase the saturation of the color parsed by ScreenBloom, like turning a TV dial. - Bug fixes and general improvements.
Previous Versions
Latest Version
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Support
Have a question about ScreenBloom? Check out the FAQ below, the Github Repo , or send me an email directly.
Think ScreenBloom is a cool app? Toss some beer money my way, if you'd like. PayPal Donation Link
System Requirements?
ScreenBloom will run on just about anything, but you'll get the best results on a quad core CPU with a wired network connection.
What Kind of Resources Does ScreenBloom Consume?
The fully installed application takes up roughly 20MB of disk space.

While running ScreenBloom lives in ~16MB of RAM and uses ~3-15% of the CPU (depending on the capabilities of the CPU).
Trouble Connecting To The Hue Bridge?
After hitting the Hue bridge button and clicking Register you get the spinning loading icon but nothing happens...

This is most commonly caused by an antivirus software blocking ScreenBloom from either syncing with the bridge or creating a config file. You'll just need to whitelist ScreenBloom in your antivirus program of choice.
ScreenBloom Error / Won't Start?
Sometimes the config file that ScreenBloom creates can get corrupted resulting in all kinds of nasty errors.

The first thing to try when solving any ScreenBloom problem is to regenerate your config file. You can re-create your config from any ScreenBloom page.

ScreenBloom Regen Config Button Check the top right section of the page
Using a High DPI / Resolution Screen?
If you've got a high resolution display ScreenBloom might have trouble grabbing an image of the entire screen. This is due to a quirk in one of ScreenBloom's dependencies.

Luckily the fix is very simple. You just need to check Disable display scaling on high DPI settings in the ScreenBloom executable's compatibility settings.

Right click on screenbloom.exe, click properties, and find the Compatibility tab. Refer to the image below.

Display Scaling Compatibility Option Find the file at the path highlighted blue and check the box highlighted red
Updated From Previous Version And Getting New Error / UI Looks Weird
Your browser might be using a cached copy of the code from the old version of ScreenBloom. You just need to hard refresh your page and your cache will be cleared.
Chrome:
Press CTRL + F5
Safari:
Press Opt + Cmd + E

Can I Use ScreenBloom with Videogames?
Definitely, but with one caveat.

Games need to be run in windowed mode to have their pixels parsed by ScreenBloom. Many games offer an official Fullscreen Borderless Windowed mode which makes this process very simple.

For everything else there is a free program available. Windowed Borderless Gaming With this software you can turn any windowed application into a borderless fullscreen one. Perfect for ScreenBloom!
Big Delays?
Some users report large delays between light updates. CPUs running ScreenBloom at a high or variable speed can cause commands to be spammed at the Hue bridge too quickly resulting in a mini DDOS attack and eventual slowdown.

Setting an Update Buffer can resolve the issue (located in the Update Speed menu).

You'll want to experiment and find the lowest possible setting that improves ScreenBloom's responsiveness.
Can I Access ScreenBloom From a Mobile Device?
ScreenBloom starts a tiny web server that hosts the application interface on your localhost IP address in the example format below:
192.168.0.X:5000
When you launch ScreenBloom your default browser will automatically access this address in a new window/tab.

Grab the address from your browser's URL bar (I just bookmark it) and head there on any device - you'll have full control over the ScreenBloom process.

The web interface is responsive and lightweight so controlling ScreenBloom with a phone or tablet is relatively painless.
About Latency
ScreenBloom’s update loop runs roughly every 100ms. Any lower and the potential for the Hue bridge to become overloaded with commands (and cause large delays) significantly increases.

100ms is fast but still latent enough to occasionally create perceptible delays when updating the lights. This is much more noticeable during very fast scenes and especially between drastically different color palettes or brightness levels. Setting a higher transition speed can help mitigate this effect.

Even so, 100ms is the best case scenario. Your network quality and CPU speed will further impact how quickly the update commands can be sent to your lights. You’ll need to tweak the program’s settings to best suit your individual setup.