Changing contrast, position, size and orientation of various shapes

Distorting shapes by pinch-twist transformation

Campbell-Robertson image: varying contrast and spatial frequency

Moving gratings with different profile and wavelength,
separated by a gray ring

Simultaneously moving, re-orienting and re-sizing 4096 objects

Intensity profiles of modulated homogeneous illuminaton

"Chirp" stimulus, varying frequency
Varying amplitude, sinusoidal and square profile
Several amplitude modulation possibilities
Result of a Fourier synthesis of six frequencies, with random phases

Random checkerboards
implemented through pixel by pixel white noise.

Intensity distribution was set by partitioning the random values spread in the [0..1] interval


Gabor stripes

Real-time spatio-temporal convolution or histogram equalization

Temporal convolution

Global picture distorsions

Simple virtual realities