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- CropProcessor: Canny/contour auto-crop with kMinFrameAreaRatio guard, percentile-based levels adjustment (0.5th/99.5th), unsharp mask sharpening - Inverter: C-41 orange mask removal via border sampling + per-channel pedestal subtraction before bitwise_not; B&W simple bitwise_not - ColorCorrector: LAB-space C-41 cast correction (a*/b* re-centering) followed by gray-world auto white balance; EXIF WB fallback - Preprocessor: 8-bit→16-bit scaling already correct; deskew stub retained Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>