Comparing Sampling Schemes for Photographic Images

Initializing live version
Download to Desktop

Requires a Wolfram Notebook System

Interact on desktop, mobile and cloud with the free Wolfram Player or other Wolfram Language products.

For printing or otherwise rendering a continuous-tone photograph, the number of tones needs to be reduced. This limited number of discrete tone levels is obtained by using a sampling scheme.


For any sampling scheme, there is a conflict between ordering (to get complete coverage) and randomness (to avoid aliasing or moiré patterns).

This Demonstration compares two types of random variation on an orderly scheme:

1. a perfectly ordered scheme with added random distortion

2. a sampling of random points nearest to an ordered raster


Contributed by: Erik Mahieu (October 2015)
Open content licensed under CC BY-NC-SA




Feedback (field required)
Email (field required) Name
Occupation Organization
Note: Your message & contact information may be shared with the author of any specific Demonstration for which you give feedback.