I understood how we came up with 5D: x, y, z location of the camera and theta and phi of the light direction. How do we reduce it to 4D light field using the assumption that radiance is constant in a single direction in space?
I understood how we came up with 5D: x, y, z location of the camera and theta and phi of the light direction. How do we reduce it to 4D light field using the assumption that radiance is constant in a single direction in space?