What Do Single-view 3D Reconstruction Networks Learn?

“We show that encoder-decoder methods are statistically indistinguishable from these baselines, thus indicating that the current state of the art in single-view object reconstruction does not actually perform reconstruction but image classification”

• all use a encode-decoder structure
• sometimes worse than image recognition

experiment

• 55 classes
• recognition baselines
  • clustering, mean shape
  • retrieval
  • oracal nearest neighbor
• from Kolmogorov-Smirnov test, we cannot reject decoder-based methods are statictically essentially recogintion baselines