j-adamczyk / document_ocr_scanner Goto Github PK
View Code? Open in Web Editor NEWDocument scanner from smarphone photos with scan OCR.
Document scanner from smarphone photos with scan OCR.
Cut out paper sheet from photo based on 4 corners of the sheet. Possible algorithms: corner detection, Hough transform for line detection + line crosses.
Apply rescaling image (e.g. by setting constant DPI) to improve Tesseract processing. Research about calculating optimal image resolution and DPI
Rotate sheet based on text block so that text will be aligned, i.e. parallel.
Arrange all existing code into a image processing pipeline.
Research image binarization methods in OpenCV and Scikit-image, with focus on local (adaptive) binarization.
Apply perspective transform to align rorated sheet (assuming it's already detected) and get it as a separate image.
Apply image filtering to denoise binarized text photo.
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