Understanding Shadows... Spanish scientists design a procedure for detecting shadows in satellite images

How many of us know where, with easy availability of 60cm resolution satellite data, it is now important to distinguish between shadows and the objects which cast them - more so for auotmated classification and feature detection in digital imageries. It is very important to detect what is or is not a shadow to correctly identify the elements that appear in it. High-resolution images provided by current satellites and planes have opened a new era in the field of teledetection, and that resolution enhancement also means that shadows, something inherent in any image, take on special significance. Source