{"schema_version":1,"experiment":"PointNet-style autoencoder pilot","created_utc":"2026-09-15T07:25:18.573687+00:00","dataset":"Objaverse subset recorded as CC0 in supplied metadata","objects":47,"categories":["animals-pets","art-abstract","cultural-heritage-history","electronics-gadgets","misc","nature-plants","news-politics"],"split_counts":{"train":28,"validation":9,"test":10},"split_sha256":"113e48f12a2866e95a3d6d9aa2674c2ffae4e583b3da0a3d7960924650039fdc","architecture":"shared MLP 3-64-128-256, max pooling, linear latent 64; MLP decoder 64-256-768","parameters":272064,"input_points":256,"latent_dimensions":64,"normalization":"scene transforms, centred bounds, unit sphere, original orientation, no RGB","training_seed":71,"epochs_per_trial":180,"selected_lr":0.003,"selection":"lowest validation Chamfer over epochs and two learning rates; test never selected","metric":"mean squared bidirectional Chamfer, sum of both directions, normalized coordinates","test_chamfer_sq":0.04162782430648804,"training_medoid_baseline_test_chamfer_sq":0.1374937269836664,"relative_gain_vs_medoid":0.6972383742900996,"inference_numpy_max_abs_error":1.1920928955078125e-07,"duration_seconds":25.245894500003487,"torch_version":"2.14.0+cpu","numpy_version":"2.5.3","device":"CPU","threads":2,"checkpoint_sha256":"3ac70df21c86582a6960000a643cb808a0dc67e93a0c7d1475c18f7981547d05","limitations":["47-object pilot is not evidence of large-corpus or domain generalization","no text alignment","no category-stratified split","near duplicates not exhaustively removed","original orientation; rotation invariance not claimed","CC0 flags from supplied metadata, not a fresh rights audit"]}