Patent Document ID: 9288362
Application ID: 14171370
Patent Status: 1

Claim One:
1. A document skew detection method, comprising: binarizing, with circuitry, a document to provide a binarized document image, performing, by the circuitry, a connected component analysis to remove noise and non-text elements from the binarized document image; then splitting, by the circuitry, the binarized document image into a first image and a second image; individually estimating, by the circuitry, a coarse skew angle for the first image and second image by performing a first pixel projection to determine a coarse horizontal line based on a maximum concentration of pixels in the pixel projection of a sharp writing line of script of the first image of the binarized document and the second image of the binarized document image; individually estimating, by the circuitry, a fine skew angle within the coarse skew angle for the first image and second image by performing a second pixel projection to determine a fine horizontal line based on a maximum concentration of pixels in the pixel projection of the sharp writing line of script of the first image of the binarized document and the second image of the binarized document; and averaging, by the circuitry, the fine skew angle for the first image and the second image to determine a final skew angle.