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The use of wavelet, DCT and quadtree for images color compression
Other Title(s)
استخدام التحويل المويجي و تحويل الجيب تمام و ترميز الشجرة الرباعية لضغط الصور الملونة
Joint Authors
Ahmad, Ali Hatim
George, Luayy Idwar
Source
Issue
Vol. 58, Issue 1C (31 Mar. 2017), pp.550-561, 12 p.
Publisher
University of Baghdad College of Science
Publication Date
2017-03-31
Country of Publication
Iraq
No. of Pages
12
Main Subjects
Information Technology and Computer Science
Abstract EN
The need for image compression is always renewed because of its importance in reducing the volume of data; which in turn will be stored in less space and transferred more quickly though the communication channels.
In this paper a low cost color image lossy color image compression is introduced.
The RGB image data is transformed to YUV color space, then the chromatic bands U & V are down-sampled using dissemination step.
The bi-orthogonal wavelet transform is used to decompose each color sub band, separately.
Then, the Discrete Cosine Transform (DCT) is used to encode the Low-Low (LL) sub band.
The other wavelet sub bands are coded using scalar Quantization.
Also, the quad tree coding process was applied on the outcomes of DCT and quantization processes.
Finally, the adaptive shift coding is applied as high order entropy encoder to remove the remaining statistical redundancy to achieve efficiency in the performance of the compression process.
The introduced system was applied on a set of standard color image; the attained compression results indicated good efficiency in reducing the size while keeping the fidelity level above the acceptable level, where it was obtained compression ratio which is around 1:40 for Color Lena, 1:30 for color Barbara.
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American Psychological Association (APA)
Ahmad, Ali Hatim& George, Luayy Idwar. 2017. The use of wavelet, DCT and quadtree for images color compression. Iraqi Journal of Science،Vol. 58, no. 1C, pp.550-561.
https://search.emarefa.net/detail/BIM-729571
Modern Language Association (MLA)
Ahmad, Ali Hatim& George, Luayy Idwar. The use of wavelet, DCT and quadtree for images color compression. Iraqi Journal of Science Vol. 58, no. 1C (2017), pp.550-561.
https://search.emarefa.net/detail/BIM-729571
American Medical Association (AMA)
Ahmad, Ali Hatim& George, Luayy Idwar. The use of wavelet, DCT and quadtree for images color compression. Iraqi Journal of Science. 2017. Vol. 58, no. 1C, pp.550-561.
https://search.emarefa.net/detail/BIM-729571
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 561
Record ID
BIM-729571