WWDCScholars

In 2022, applicants were tasked with creating a Swift Playgrounds app project on the topic of your choice to showcase their passion for coding. Here’s how Eskil describes his winning submission.

This year, I leveraged my interest for the applications of Fourier Analysis in signal processing, to create an app exploring various techniques of lossy image compression. I wrote a DCT 2D algorithm to discard higher frequencies, related to fine detail, in the grayscale part of the image. Then also provided algorithms for chroma subsampling, and reducing the number of colors for storing in a look-up-table. A big focus for me was speed, so all image-algorithms were written in Metal.