Computer Vision, Neural Radiance Fields, Astronomy, Synthetic Computer Vision, 3d Computer Graphics.
vector I represent the image plane (discrete due to different points on the image plane): I (t) = [p¹(t), p²(t), …, pᴺ×ᴺ(t)] This model computes the intensity along the ray, s (since ray path in General Relativity is 4D (time + 3D of space)), given the ray-path for nᵗʰ pixel Γₙ = (t(s), x(s)).