US 2008/0175515 A1 · METHOD FOR ALIGNING A MODIFIED DOCUMENT AND AN ORIGINAL DOCUMENT FOR COMPARISON AND DIFFERENCE HIGHLIGHTING

Abstract

A method for aligning a modified document and an original document is provided according to an aspect of the present invention. The method includes a step of receiving a first bitmap representative of the modified document, including a first anchor. Additionally, a second bitmap representative of the original document including a second anchor is received. The method also includes the step of deriving a set of first vertex coordinates of the first anchor, and a set of second vertex coordinates of the second anchor. The method further includes the step of transforming the first bitmap to a common reference based upon the first set of vertex coordinates, and the step of transforming the second bitmap to the common reference based upon the second set of vertex coordinates.

Claims20

Dependent claims

A method for aligning a modified document and an original document for emphasizing differences, the method comprising:

receiving a first bitmap representative of the modified document including a first anchor, and a second bitmap representative of the original document including a second anchor;
deriving a set of first vertex coordinates of the first anchor and a set of second vertex coordinates of the second anchor;
transforming the first bitmap to a common reference based upon the first set of vertex coordinates;
and
transforming the second bitmap to the common reference based upon the second set of vertex coordinates.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

11/626,709Filed 24 Jan 2007

Published

24 Jul 2008

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

G06T 7/33
Determination of transform parameters for the alignment of images, i.e. image registration: using feature-based methods
G06T 7/246
Analysis of motion: using feature-based methods, e.g. the tracking of corners or segments
G06V 10/243
Aligning, centring, orientation detection or correction of the image: by compensating for image skew or non-uniform image deformations
G06T 2207/30176
Subject of image; Context of image processing: document

Method for aligning a modified document and an original document for comparison and difference highlighting

Life of this patent

Method for aligning a modified document and an original document for comparison and difference highlighting

Life of this patent

Abstract

Claims20