Figure: Torque Edge Map Comparison between *Van Gogh’s Old Man Portrait (1885)* and *The Tree Oil Painting* (X-ray).
The left image shows torque patterns extracted from Van Gogh’s confirmed work. The right image represents the same algorithm applied to the Tree Oil X-ray canvas.

This side-by-side comparison enables neural matching of rotational brush energy, force alignment, and torque resonance.
Such maps are foundational in AI-based authorship verification and biomechanical brushstroke analysis.