Colorizer round6: large critic training step 4000

experiments/large-critic-20260928/SHA256SUMS.json

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experiments/large-critic-20260928/history.json

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experiments/large-critic-20260928/step_04000/ema/README.md

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+# Experimental semantic colorizer
+
+Head: palette. Parameters: 3994676.
+
+Not approved for production. Requires semantic_model.py; incompatible with the old U-Net loader. Input is Lab lightness normalized to [-1,1]; output is Lab ab. See the run protocol, provenance, selection and visual comparisons. Predictions are plausible colors, not recovered historical truth.

experiments/large-critic-20260928/step_04000/ema/config.json

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+{
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+  "head": "palette",
+  "width": 128,
+  "queries": 16,
+  "format_version": 1
+}

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experiments/large-critic-20260928/step_04000/raw/README.md

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+# Experimental semantic colorizer
+
+Head: palette. Parameters: 3994676.
+
+Not approved for production. Requires semantic_model.py; incompatible with the old U-Net loader. Input is Lab lightness normalized to [-1,1]; output is Lab ab. See the run protocol, provenance, selection and visual comparisons. Predictions are plausible colors, not recovered historical truth.

experiments/large-critic-20260928/step_04000/raw/config.json

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+  "architecture": "SemanticColorizer",
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