Compound Document Compression Algorithms for Text/Background Overlapping Images

ASIAIR > College of Computer Science > Department of Computer Science and Information Engineering > Journal Artical > Item 310904400/18551

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Title:	Compound Document Compression Algorithms for Text/Background Overlapping Images
Authors:	陳彥霖;Chen, Yen-Lin
Contributors:	資訊工程學系
Date:	2004-12
Issue Date:	2012-11-26 05:55:07 (UTC+0)
Abstract:	Two algorithms are presented for compressing image documents, with a high compression ratio for both colour and monochromatic compound document images. The proposed algorithms apply a new method of segmentation to separate the text from the image in a compound document in which the text overlaps the background. The segmentation method classifies document images into three planes: the text plane, the background (non-text) plane and the text’s colour plane, each of which are processed using different compression techniques. The text plane is compressed using the pattern matching technique, called JB2. Wavelet transform and zerotree coding are used to compress the background plane and the text’s colour plane. Assigning bits for different planes yields high-quality compound document images with both a high compression ratio and well presented text. The proposed algorithms greatly outperform two well known image compression methods, JPEG and DjVu, and enable the effective extraction of the text from a complex background, achieving a high compression ratio for compound document images.
Relation:	IET Computer Vision
Appears in Collections:	[Department of Computer Science and Information Engineering] Journal Artical

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