MODEL-BASED DEWARPING METHOD AND APPARATUS

摘要

An apparatus and method for processing a captured image and, more particularly, for processing a captured image comprising a document. In one embodiment, an apparatus comprising a camera to capture documents is described. In another embodiment, a method for processing a captured image that includes a document comprises the steps of distinguishing an imaged document from its background, adjusting the captured image to reduce distortions created from use of a camera and properly orienting the document is described.

主权项

1. A method for processing a captured image that comprises an imaged document; said method comprising:
detecting graphical information in the captured image relating to the transition between said imaged document and the remainder of said captured image; selecting one or more lines from said graphical information corresponding to edges of said imaged document; calculating corners of said imaged document based on intersection of one or more lines corresponding to edges of said imaged document; isolating said imaged document from background of said captured image based on one or more lines corresponding to edges of said imaged document; setting a curved coordinate net on said imaged document; stretching said curved coordinate net to a rectangle coordinate net; adjusting said rectangle coordinate net to a well-proportional rectangle coordinate net.