171110 Bad Pixels
Struggling with pixel output from coding PuriPhoto.
270709 Featherlight Script
The “point cloud” effect used in Decortica’s Featherlight music video was generated by running video frames through a Processing script. Processing is an open source lightweight programming language and environment geared towards creatives and researchers to generate various data visualisations. Processing provides simple means of accessing and interpreting: images, video, sound, web data etc. It is a particularly simple programming tool for those who want to give it a go.
The Featherlight script resolves 2D images into a array of pixels (point cloud) which it colours and positions in 3D space. Brighter pixels are positioned at a depth and darker pixels closer to the viewing plane or front of the point cloud. From front on, the point cloud appears a close representation of the input image with some interesting distortions. These distortions are a result of visual perspective. The bright points, most distant from the viewer, appear inset from the bounds of the video frame and behind the darker pixels which then appear to be stepping out from the frame. A best example of this effect is between 2.00 and 2.30 in the video. This portion’s explosive backgrounds force the script to drop the bulk of the point cloud away from the viewer and behind the silhouettes of the band. Variations in the brightness of the explosions cause the points to move forward and back, warping the frame edge.
At other points in the video, such as between 1.00 and 1.20, the point cloud orbits. Here you can see the variation in point depth most clearly. The brightness of Matt’s face appears to be pull off its background.
The Featherlight processing script can be downloaded here. (you will need to download processing first).
I have simplified the and annotated the script so that it is clear what each part is doing. Most of the programming occurs within the draw() function. I have highlighted three key parts.
Part 01 imports the specified image and interprets into pixel by pixel data.
More info, summary, images, outakes posted on decortica.com