Psychophysics Exercises

Frequency Just Noticeable Difference (JND)

Masking

Octaves

RGB mixer

Hermann von Helmholtz (1821-1894)

"The true scientist must always have something of the vision of an artist, something of the vision which led Goethe and Leonardo da Vinci to great scientific thoughts.  Both artists and scientists strive, even if in different ways, toward the goal of discovering new uniformities or lawful regularities.  ...  The true artist and the true scientist both know how to work steadily and how to give their work a convincing, truthful form."---  Helmholtz, from speech given at the Commemoration-Day Celebration of the Frederick William University in Berlin, August 3, 1878.