I am answering for the first interpretation, as "deep paper" most commonly refers to in technical contexts. Technical Context: 3D Ring Artifacts & Deep Learning
A "papercraft" or physical 3D ring model made of high-quality "deep" paper stock. [3D] Tamaki (Ring) – NekoPoi
Researchers often use 3D Convolutional Neural Networks (CNNs), like the U-Net architecture, to "paint over" or remove these ring-shaped defects in 3D scans. I am answering for the first interpretation, as
Which of these interpretations were you looking for, or were you referring to something else entirely? like the U-Net architecture