Anti-compression

Avoidance of crossing

Bump map from image

The cardioid and the nephroid

The cascade algorithm

Caustic at the bottom of a cup

Central limit theorem and diffusion

Color spaces

A curious product

DCT-II basis functions

Denoising with wavelets

Dictionary methods

Digital low-pass filters

Digital windows

Dirichlet, Fejér and more

Dithering

Edge detectors

Edges with wavelets

Electromagnetic drawings with sagemath

The expanded infinite potential well

The finite wavelet expansion

Fundamental domains

A fundamental pinch

Gaussian Farey fractions

GIMP: Alpha to Logo

Gravitational slingshot

A Haar wavelet expansion

Harmonic oscillations

Histogram manipulation

Homomorphic filtering

Huffman trees

Interference of 1D waves

JPEG

Julia & Newton

The Kuwahara filter

The Lloyd-Max algorithm

Maass forms

Magic cans

Masking the JPEG Fourier coefficients

The matrix of the DWT

Mean vs. median

The Meyer wavelet

A miniFIGlet

Moiré effect

Morphological filters

A nonconstant function

The Parks-McClellan algorithm

Pencil line drawing effect

Periodic noise

"The poetry of analysis" (Ad)

Ray tracing dodecahedrons

Ray tracing Rubik's cube skeleton

Runge's phenomenon

A sage plotter

Signal compression

Simple Fourier series

Simple image filters

My snake lemma

Sound quantization

A spiraling (or not) exponential sum

Splines are nearly local

The strange beat

A Sugihara illusion

Talbot carpets

Where is my pencil?

Wigner's semicircle law

Windowed transforms