Better Available Light Digital Photography : How to Make the Most of Your Night and Low-light Shots

72 Better Available Light Digital Photography

Noise in motion

When trying to sharpen photos that have either out-of-focus blur

or camera shake, noise can be a problem. If you run a noisy

image through a normal Unsharp Mask–based sharpening

program noise increases signifi cantly. That’s when you need a

STOIK Noise AutoFix uses adaptive algorithms, image representation, and statistical methods to achieve its
noise correction. The main internal modules of the software include Noise Detector, which is based on a
Bayesian classifi er that was trained to distinguish typical noise patterns from image textures and fi ne details.
It also includes Noise Analyzer to build noise profi les and calculate fi lter parameters according to statistical
image-quality criteria, and a noise-suppression fi lter is based on multiresolution image representation and
statistical decision-making procedures. © 2006 Joe Farace.