Video roller on the wall. How do they do it?

Question

Do it yourself

SWEATSHOPPE Video Painting Europe from SWEATSHOPPE on Vimeo .

Wise habra, I appeal. Extremely interested in technology.

Addendum: How do you do it yourself?

Answer 1

The description of the video briefly explains the technology:

Video painting is a technology the duo developed that allows them to create the illusion that they are painting videos onto walls with electronic paint rollers they built. It works through custom software that they wrote that tracks the position of the paint rollers and projects video wherever they choose to paint, allowing them to explore the relationship between video, mark making and architecture and create live video collages in real time.

Answer 2

Pre-prepared video + projector + movements rehearsed for a specific video, imitating the coloring of the wall with a roller.

Answer 3

IMHO: It is very similar to the fact that there is a camera + projector. The roller is painted in some contrasting color, or there are some sensors on it. Thus, the camera catches the position of the roller in space, and special software + projector draw video on the wall. Something like this…

Answer 4

Perhaps something like kinect to determine the position of the roller. The roller acts as a brush for the alpha channel of the video with predefined and rehearsed scene switches.
Well, or option 2 (IMHO more realistic): I saw that it is noticeably accelerated, at low speed it is quite possible to have time to just drive the roller in the right places and remove it properly in a couple of takes.

Answer 5

On software like Adobe After Effects, you can do it in a couple of days if you need video.

Answer 6

The whole trick is that the camera does not move
1. We have a certain wall - in the future this will be the first layer
2. The second layer is a person with a roller and a projector behind his back. The projector because there is a shadow from the artist + the picture is displayed on it.
3. Merge the two layers and do not forget about the masks

Answer 7

Why Kinect? There is a long-known and proven technology of combined shooting, when 2 channels are filmed (the second in infrared light, but not necessarily), a mask is created and applied. Here, the role of the 2nd channel will be successfully performed by the back of the transparent glass, on which they paint with a roller, if they do not want to select the shooting conditions for a long time on one side. Or the second option is to manually create a mask frame-by-frame, which is easier if you are too lazy to organize shooting from 2 cameras.

Answer 8

Looks like it's using Chroma key technology

Answer 9

Two infrared sensors on the roller and some programming :)