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Camera-based document imaging

一种文档、文本的技术，应用在处理照相机拍摄的图像领域

Active Publication Date: 2011-06-01
COMPULINK MANAGEMENT CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0010] However, none of these methods have been found to be fully satisfactory for developing documents captured by digital cameras.

Method used

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Experimental program
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Embodiment Construction

[0031] Embodiments of the present invention will now be described with reference to the accompanying drawings. For ease of description, any reference number representing an element in one figure will represent the same element in any other figure. figure 1 is a flowchart illustrating the steps of camera-based document image development processing according to one embodiment of the present invention.

[0032] refer to figure 1 , a method 100 for expanding a document image captured by a camera is provided. Method 100 involves analyzing the position and shape of lines of text included in an imaged document and then straightening them into a regular grid. In the illustrated embodiment, method 100 includes three main steps: (1) text detection step 102 , (2) shape and orientation detection step 104 , and (3) image transformation step 106 . Each major step may further include several sub-steps, as described below.

[0033] 1. Text detection

[0034] The text detection step 102 fin...

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PUM

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Abstract

A process and system to transform a digital photograph of a text document into a scan-quality image is disclosed. By extracting the document text from the image, and analyzing visual clues from the text, a grid is constructed over the image representing the distortions in the image. Transforming the image to straighten this grid removes distortions introduced by the camera image-capture process. Variations in lighting, the extraction of text line information, and the modeling of curved lines in the image may be corrected.

Description

[0001] Cross References to Related Applications [0002] This patent application claims priority under 35 U.S.C. 119(e) to U.S. Provisional Application No. 61 / 126,781, filed May 6, 2008, and U.S. Provisional Application No. 61 / 126,779, filed May 6, 2008 , both applications are hereby incorporated by reference. technical field [0003] This application relates generally to digital image processing, and more particularly to processing images captured by cameras. Background technique [0004] Document management systems are becoming more and more popular. Such a system eases the burden of storing and processing large document databases. Many institutions store large amounts of information in physical documents that they want to convert into digital format for ease of management. Currently, a combination of optical scanning and optical character recognition (OCR) technology, such as embodied in ABBYY-FineReaderPro 8.0, converts these documents into electronic form. However, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/34G06V30/10
CPCH04N1/00251G06T3/0031G06K9/3283G06V30/1478G06V30/10G06V30/1463G06T3/06G06T3/18G06T5/80
Inventor M·亨特M·帕夫罗斯卡亚L·戈登W·蒂普顿T·普哈姆D·永顾卫青J·埃根吴梁楠K-C·旺
Owner COMPULINK MANAGEMENT CENT
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