Adaptive Threshold
Enhance text legibility under non-uniform lighting conditions using adaptive thresholding.
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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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