STRAIGHTENING OUT DISTORTED PERSPECTIVE ON IMAGES

摘要

Methods for correcting distortions in an image including text, or an image of a page that includes text, are disclosed. The methods include identifying reliable and substantially straight lines from elements in the image. Vanishing points are determined from the lines. Parameters associated with a rectangle are determined. A coordinate conversion is performed.

主权项

1. A method for correcting a distortion in an image including text, the method comprising:
generating a first set of substantially straight lines corresponding to a first direction for a quadrangle for the image; generating a second set of substantially straight lines corresponding to a second direction for the quadrangle for the image; finding a first vanishing point based on said first set of substantially straight lines; finding a second vanishing point based on said second set of substantially straight lines; identifying the quadrangle for the image based on the first vanishing point and the second vanishing point; determining a parameter for a rectangle of a corrected image; and reducing the distortion in the image including text by generating the corrected image based on the rectangle at least partially in a memory of a computer device.