The 80 × 112 × 3 image, in scalars

The notebook builds a seeded synthetic RGB scene of shape (80, 112, 3) — smooth fields, sharp edges, curved detail and weak noise — as a stand-in for a feature map. Dense, it holds 26,880 scalars.

Rank	Factor scalars	vs dense
50	50 · (80 + 336 + 1) = 20,850	fewer
80 (full)	33,360	more

It compares ranks 1, 5, 20 and 50. Full rank is 80 because the unfolding is 80 × 336.