Figure 7
From: Efficient robust image interpolation and surface properties using polynomial texture mapping
Visualization of selected polynomial basis functions. (a) 1, (b) u, (c) v, (d) w, (e) uv, (f) u2, (g) uvw, (h) u2, (i) u3. The distance r from the origin to any point (θ,ϕ,r) on the plot surface is proportional to the value of the polynomial term P at direction (θ,ϕ), with cyan indicating positive values and purple negative. Red, green, blue indicate x, y, z axes, respectively.