Use of Radon Transform in Orientation Estimation of Printed Text
نویسنده
چکیده
Alignment of images of printed text is needed as a preprocessing for the purpose of OCR. The test for an image alignment is easily developed by summation of pixels horizontally. However, the angel of orientation of the text is not easily estimated. In this paper, a method for estimation of this angle is presented. The Radon transform is used. The spaces between lines are considered as thick lines, which appear in Radon transform 3D plot as a hill (when background is white). Different angles were tested, which showed an acceptable accuracy of tilt angle measurement.
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