Detect Document
Detect document edges and crop sheet bounds from photos automatically.
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Loading OpenCV WebAssembly module...
Notice: Could not automatically detect a 4-point paper boundary contour.
Original Input Image
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OpenCV Computer Vision Document Scanner
4-Point Quadrilateral Detection
Uses Gaussian blur, Canny edge detection, and contour analysis to detect sheet margins in photo captures.
Perspective Warp Matrix
Calculates geometric perspective transform matrix (`getPerspectiveTransform`) to un-tilt angled camera shots.
Contrast Enhancement
Applies adaptive binarization and contrast stretching for clear black & white printed text readability.
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