It turns out that if you take an image, convert its information into waves of varying frequencies, and then reconstruct the image (this is a HTML canvas) from these waves, you can make it look like it's being displayed on an old-timey analog TV! Of course, these are not disjoint phenomena. I use the Fourier transform (specifically, the FFT) to convert the color and brightness information of the pixels into frequency-domain representations, an idea I had during a reading project on integral transforms. As you move the slider to the right, you increase the bandwidth allowed through, letting more detail return and making the image sharper.

Hiten Dalmia

I have an undergraduate education in Mathematics and Economics from Kirori Mal College, University of Delhi. Until recently, I was at the Chennai Mathematical Institute as a master's student in Theoretical Computer Science.