Before revision: Physically based BRDFs Physically realistic BRDFs have additional properties, including, positivity: obeying Helmholtz reciprocity: conserving energy: Applications The BRDF is a fundamental radiometric concept, and accordingly is used in computer graphics for photorealistic rendering of synthetic scenes (see the rendering equation), as well as in computer vision for many inverse problems such as object recognition.
After revision: for reciprocal linear opticsPhysically based BRDFs Physically realistic BRDFs have additional properties, including, positivity: obeying Helmholtz reciprocity: conserving energy: Applications The BRDF is a fundamental radiometric concept, and accordingly is used in computer graphics for photorealistic rendering of synthetic scenes (see the rendering equation), as well as in computer vision for many inverse problems such as object recognition.