A Novel Psychovisual Threshold on Large DCT for Image Compression
Joint Authors
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-03-22
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Medicine
Information Technology and Computer Science
Abstract EN
A psychovisual experiment prescribes the quantization values in image compression.
The quantization process is used as a threshold of the human visual system tolerance to reduce the amount of encoded transform coefficients.
It is very challenging to generate an optimal quantization value based on the contribution of the transform coefficient at each frequency order.
The psychovisual threshold represents the sensitivity of the human visual perception at each frequency order to the image reconstruction.
An ideal contribution of the transform at each frequency order will be the primitive of the psychovisual threshold in image compression.
This research study proposes a psychovisual threshold on the large discrete cosine transform (DCT) image block which will be used to automatically generate the much needed quantization tables.
The proposed psychovisual threshold will be used to prescribe the quantization values at each frequency order.
The psychovisual threshold on the large image block provides significant improvement in the quality of output images.
The experimental results on large quantization tables from psychovisual threshold produce largely free artifacts in the visual output image.
Besides, the experimental results show that the concept of psychovisual threshold produces better quality image at the higher compression rate than JPEG image compression.
American Psychological Association (APA)
Abu, Nur Azman& Ernawan, Ferda. 2015. A Novel Psychovisual Threshold on Large DCT for Image Compression. The Scientific World Journal،Vol. 2015, no. 2015, pp.1-11.
https://search.emarefa.net/detail/BIM-1079174
Modern Language Association (MLA)
Abu, Nur Azman& Ernawan, Ferda. A Novel Psychovisual Threshold on Large DCT for Image Compression. The Scientific World Journal No. 2015 (2015), pp.1-11.
https://search.emarefa.net/detail/BIM-1079174
American Medical Association (AMA)
Abu, Nur Azman& Ernawan, Ferda. A Novel Psychovisual Threshold on Large DCT for Image Compression. The Scientific World Journal. 2015. Vol. 2015, no. 2015, pp.1-11.
https://search.emarefa.net/detail/BIM-1079174
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1079174