Image Compression with Inverse Pyramid Decomposition over Wavelet Spectrum

Sechkova, Teodora G. and Draganov, Ivo R. (2012) Image Compression with Inverse Pyramid Decomposition over Wavelet Spectrum. In: "International Scientific Conference on Information, Communication and Energy Systems and Technologies ICEST" (28-30 June 2012) hosted in Veliko Tarnovo, Bulgaria, June 28-30, 2011, Veliko Tarnovo, Bulgaria.

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In this paper a novel approach is presented for compression of digital images. It consists of finding the wavelet spectrum of an image into certain number of sub-bands after given levels of regular or irregular decomposition. Then each sub-band is decomposed with the inverse pyramid algorithm using some linear orthogonal transform such as DCT. Depending on whether a lossless or lossy compression is desired all or only some of the spectral coefficients from the inverse pyramid are preserved and then entropy coding is applied. Higher compression ratios are achieved at high image quality levels compared to some popular algorithms from the practice.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Image Compression, Wavelet, IPD, DCT
Subjects: Scientific Fields (Frascati) > Engineering and Technology > Electrical engineering, electronic engineering,information engineering
Divisions: Faculty of Technical Sciences
Depositing User: ICEST
Date Deposited: 18 Mar 2020 17:15
Last Modified: 18 Mar 2020 17:15

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