Patent ID: 9495343
Filing Date: 2016-11-15
CPC Classification: G06F,G06K

Claim Text:
1. A method for detecting and removing vertical and horizontal lines in a grayscale document image, comprising: generating a plurality of binary images from the grayscale document image using a plurality of different binarization conditions; detecting horizontal and vertical lines in each of the plurality of binary images independently, to generate a plurality of sets of bounding boxes corresponding to the plurality of binary images, each set of bounding boxes including a plurality of bounding boxes each representing a detected vertical or horizontal line; merging the plurality of sets of bounding boxes into one merged set of bounding boxes representing vertical and horizontal lines detected in the grayscale image; and processings a binary image generated from the grayscale document image to remove horizontal and vertical lines from it using the merged set of bounding boxes representing the detected lines.