Post-processing coding artefacts for JPEG documents

Coding artefacts, including ringing and blocking artefacts, are often introduced when document images are compressed using the JPEG standard. These artefacts severely impact visual perception of the image content. Although a number of methods have been presented to deal with coding artefacts, most o...

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Bibliographic Details
Published in:International journal on document analysis and recognition 2017-09, Vol.20 (3), p.189-200
Main Authors: Pham, The-Anh, Delalandre, Mathieu
Format: Article
Language:English
Subjects:
Coding
Computer Science
Image compression
Image Processing and Computer Vision
Image quality
Image reconstruction
JPEG encoders-decoders
Measurement
Original Paper
Pattern Recognition
Post-processing
Visual perception
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Summary:Coding artefacts, including ringing and blocking artefacts, are often introduced when document images are compressed using the JPEG standard. These artefacts severely impact visual perception of the image content. Although a number of methods have been presented to deal with coding artefacts, most of them are dedicated to natural images; few works have investigated to work on document content. The current work is an attempt to fill this lack. In contrast to all the approaches taken by previous works, we propose to post-process the coding artefacts by estimating the quantization noise, which is not available on the decoder’s side. The estimated noise is then used to reconstruct the image with better quality. A number of experiments were conducted to show the efficiency of the proposed method in comparison with the state-of-the-art methods.
ISSN:1433-2833
1433-2825
DOI:10.1007/s10032-017-0288-4