One knob, one curve

Pick an object and one image change, then drag the slider. Every image is a point in pixel space (96 × 96 = 9,216 numbers). Changing one knob traces a curve through that space; the right panel shows the curve projected onto its first two principal components.

Change

Image

All images of this change, on the first two principal components (click or drag the curve)

One knob traces a curve: intrinsic dimension 1. The curve bends, so a flat plane (PCA) keeps only part of it.