Oftentimes water can be a dominant signature in a polarimetric image dataset. Incorporation of water into a DIRSIG simulated polarimetric scene can be accomplished a few different ways, namely treating the water as (1) a volumetric medium having both surface and bulk medium optical properties or (2) a surface, reflecting only material described by a micro-facet based BRDF. This example has three boxes of water demonstrating the differences between the water medium material properties (with a flat and a wavy surface) and the microfacet surface water material. Note that treating water as a medium permits 1st surface reflection and transmission as well as bulk material radiative transfer, whereas the micro-facet BRDF water material only accounts for 1st surface reflected radiance effects. The water medium material utilizes well defined inherent optical properties of water that are contained within the DIRSIG model (validated here ) and is well suited for closed volumetric shape
A blog about the Digital Imaging and Remote Sensing Image Generation (DIRSIG) model featuring posts contributed by the developers. This is not a user manual and it is not a training class. But, it is a place to see what the developers are doing and a little about how we do it. So think of this as a place to learn cool tips, tricks, etc.