Eric Souther & Laura McGough
Phosphortron is a video instrument that emulates the phosphor trails found in analog cathode ray tube (CRT) oscilloscopes and television monitors. The instrument uses a computer vision technique called frame difference, which compares the current frame versus the previous frame and analyzes change based on a threshold pixel by pixel. The trail duration function controls how long previous information stays on screen before fading away the simulated phosphors. Edge detection is utilized in conjunction with frame difference, to isolate and accentuate the outlines to loosen the raster image towards the simulated aesthetics of vector drawing.
In CRT monitors, a cathode-ray tube which contains one or more electron guns directs electron beams onto a phosphor-coated screen. The phosphors illuminate, or glow, when excited by the electron particles. In CRT oscilloscopes, like those used for radar or medical imaging, the illumination undergoes a slow decay and continues to glow long after the electrons have excited the phosphor coating. Conversely, in CRT television and videogame screens the decay rate is much shorter, as images more quickly replace one another.
With Phosphortron, users can emulate a range different responses. The decay rate can be exaggerated by increasing the trail rate, while the flood and smear that CRT monitors exhibited before the advent of shadow-masks can be amplified by decreasing the line threshold. Phosphortron also contains Syphon & Spout integration which allows it to play well with other software including the Signal Culture apps and Lumen.
Attribution-NonCommercial-ShareAlike CC BY-NC-SA
This license lets others remix, tweak, and build upon your work non-commercially, as long as they credit you and license their new creations under the identical terms.
Signal Culture Applications, 2016-Present
The Signal Culture Apps gives you access to custom professional video and new media software applications for producing real-time experimental media artworks. Great for artists, VJ's, designers and hobbyists!
All SC Apps feature a range of frame rates and dimensions for both SD and HD workflows.
These apps have external device support including easy midi controller assignment, external video cards, and live feed processing from webcams and external streaming devices.
Apps also feature OSC, Syphon and Spout Integration to send/receive messages or video to and from other OSC/Syphon/Spout devices and software in real time!
Get all the apps in the App Bundle and save!
Check out all of the tutorial videos on the
Signal Culture Apps are designed for Mac OSX 10.9 or newer or Windows 10.
All Signal Culture Apps are developed by Jason Bernagozzi and Eric Souther.