Neural Reflectance Fields for Appearance Acquisition

data aquisition

• phone with a builtin flash

light along camera ray and reflected from light source

• single light source in this setting
• pre-compute sampled points
• mlp outputs rgb, normal and other params for the reflection model
  • microfacet model, karris’ approximation
  • also can use other models, like those for fur
• COLMAP for camera param. crop center regions to avoid background pixels