NCSR Geometric Correction: Page Curl


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Scenario


This tool rectifies document images which suffer from warping and perspective distortions that deteriorate the performance of current OCR approaches.

Abstract


The page curl process aims to correct distortions sometimes observed in document images due to the physical characteristics of printed material (e.g. bound volumes), the camera setup, or environmental conditions (e.g. humidity that can cause page shrinking over time).

At a first step, this tool applies a rough transformation model that maps the projection of a curved surface to a 2D rectangular area. This initial transformation is then fine-tuned by the detection of individual words within the print space.

Dew Input 1

Dew Input 1

Dew Output 1

Dew Output 1

 

Dew Input 2

Dew Input 2

Dew Output 2

Dew Output 2

 

Dew Input 3

Dew Input 3

Dew Output 3

Dew Output 3

Publications

Availability

For information on licencing, please contact NCSR IMPACT group.

OCR Post-correction and Enrichment

Further resources

Succeed training materials

Abbyy FineReader

Page curl correction

For old books and newspapers it is often not possible to remove the binding before digitizing the individual pages.

Image processing

PDFWIKISCORM