Text enhancement in digital video using multiple frame integration

Authors:
Huiping Li;David Doermann
Affiliations:
Language and Media Processing Lab, Center for Automation Research, University of Maryland, College Park, MD;Language and Media Processing Lab, Center for Automation Research, University of Maryland, College Park, MD
Venue:
MULTIMEDIA '99 Proceedings of the seventh ACM international conference on Multimedia (Part 1)
Year:
1999

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Abstract

In this paper a multiple frame based technique to enhance text in digital video is presented. After extracting a reference text block, we use an image matching technique to find the corresponding text blocks in consecutive frames. We register these text blocks to subpixel levels by using image interpolation techniques to improve both correspondence and text resolution. The registered text blocks are averaged to obtain a new text block with a clean background and a higher resolution. Experiments conducted on several video sequences show that our enhancement scheme can improve the accuracy of commercial off-the-shelf OCR considerably.