image processing Uncategorized

New Image via Cut-and-Paste

Previously, (1, 2) I’ve chopped one picture into square sections to make a new image. This time, I want to take freeform sections from a larger image to make a smaller one. This is basically like taking scissors to a magazine, then putting together the pieces to make a new picture. Let’s call the magazine […]

halftoning image processing penplotter Uncategorized

More Fourier Noise Contours

Previously, I used single-frequency Fourier noise to do some halftoning. This time, I’ll use broad-frequency noise. I’ll filter 2D white noise with a gaussian with standard deviation . This reduces the high-frequency content. Let’s call the filtered noise , and the gradient-scaled version. Skipping all the tedious probability work, the pdf of the gradient-scaled noise […]