Introduction - If you have any usage issues, please Google them yourself
This paper provides the derivation of speckle
reducing anisotropic diffusion [SRAD], a diffusion method tailored
to ultrasonic and radar imaging applications. SRAD is the
edge-sensitive diffusion for speckled images, in the same way that
conventional anisotropic diffusion is the edge-sensitive diffusion
for images corrupted with additive noise.