edge detection; image segmentation; optical character recognition; OCR system; automatic character segmentation; character partitioning; compass operator; complex background; complex scenarios; complex uncontrolled environment; localized Canny operator; multioperator combined character segmentation algorithm; noisy background; optical character recognition system; performance analysis; preedge detection; uncontrolled lighting condition; Accuracy; Algorithm design and analysis; Character recognition; Compass; Image edge detection; Image segmentation; Lighting; Compass Operator; Optical Character Recognition; character segmentation; edge detection; image segmentation;
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