3 Commits

Author	SHA1	Message	Date
Benjamin Admin	09b820efbe	refactor(dewarp): replace displacement map with affine shear correction ... The old displacement-map approach shifted entire rows by a parabolic profile, creating a circle/barrel distortion. The actual problem is a linear vertical shear: after deskew aligns horizontal lines, the vertical column edges are still tilted by ~0.5°. New approach: - Detect shear angle from strongest vertical edge slope (not curvature) - Apply cv2.warpAffine shear to straighten vertical features - Manual slider: -2.0° to +2.0° in 0.05° steps - Slider initializes to auto-detected shear angle - Ground truth question: "Spalten vertikal ausgerichtet?" Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>	2026-02-26 18:23:04 +01:00
Benjamin Admin	ff2bb79a91	fix(dewarp): change manual slider to percentage (0-200%) instead of raw multiplier ... The old -3.0 to +3.0 scale multiplied the full displacement map (up to ~79px) directly, causing extreme distortion at values >1. New slider: - 0% = no correction - 100% = auto-detected correction (default) - 200% = double correction - Step size: 5% Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>	2026-02-26 18:10:34 +01:00
Benjamin Admin	589d2f811a	feat: Dewarp-Korrektur als Schritt 2 in OCR Pipeline (7 Schritte) ... Implementiert Buchwoelbungs-Entzerrung mit zwei Methoden: - Methode A: Vertikale-Kanten-Analyse (Sobel + Polynom 2. Grades) - Methode B: Textzeilen-Baseline (Tesseract + Baseline-Kruemmung) Beste Methode wird automatisch gewaehlt, manueller Slider (-3 bis +3). Backend: 3 neue Endpoints (auto/manual dewarp, ground truth) Frontend: StepDewarp + DewarpControls, Pipeline von 6 auf 7 Schritte Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>	2026-02-26 16:46:41 +01:00