|Abstract: ||Described herein are various technologies relating to constructing a
differenced change product (DCP) image. A plurality of synthetic aperture
radar (SAR) images of a scene are generated based upon radar signals
directed towards and reflected off of the scene, and a plurality of
coherence change detection (CCD) images of the scene are generated based
upon the SAR images. The CCD images are registered with one another, and
their pixel values re-scaled according to a monotonic mapping function.
The DCP image is generated based upon a computed pixel-wise difference
between a pair of the re-scaled CCD images. The DCP image identifies
locations in the scene where human activity-induced change is likely to
have occurred between a pair of SAR passes of the scene.