ITP Notebook

Week 1: Image and Video

November 10, 2020

ICM: Media

For my image project I have created Texturizer, a program that generates moving textures from random stock images.

It uses the Unsplash random endpoint to fetch a source image on user click and then begins “painting” based on that picture. Building from Dan Schiffman’s “Particles” I created an algorithm that randomly selects 2000 points at which to begin drawing. Each point samples the original image and uses the color values to modulate the size and speed of a rectangle starting at that point. The rectangles are drawn almost transparently which leads to an “ink blot” type effect. Faint white lines connect pixels of extreme color (high red but low blue and green for example). Sometimes the result might resemble a modern abstract painting, other times it looks more like an early 2000s screen-saver. ¯\_(ツ)_/¯

Here is a snippet of the update function for a particle. The position, width, and height are calculated based on the original pixel’s color and brightness. I also added some noise which adds some natural movement to the motion.

const noiseVal = noise(this.x, this.y);

this.w = sin(count / startColor[1]) * map(startColor[2], 0, 255, 30, 120);
this.h = cos(count / startColor[1]) * map(startColor[0], 0, 255, 30, 120);

this.x += (noiseVal * (mouseX / width - 0.5) * brightness(startColor)) / xDamp;
this.y += (noiseVal * (mouseY / height - 0.5) * brightness(startColor)) / yDamp;

Controls: Click to generate a new image. Move mouse to adjust painting direction.

Try it out or view the source.

An interactive P5 Editor is available here;

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