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SIDDEQ, Mohammed M. and RODRIGUES, Marcos A. (2020). A novel Hexa data encoding method for 2D image crypto-compression. Multimedia Tools and Applications, 79 (9-10), 6045-6059.
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Abstract
Abstract: We proposed a novel method for 2D image compression-encryption whose quality is demonstrated through accurate 2D image reconstruction at higher compression ratios. The method is based on the DWT-Discrete Wavelet Transform where high frequency sub-bands are connected with a novel Hexadata crypto-compression algorithm at compression stage and a new fast matching search algorithm at decoding stage. The novel crypto-compression method consists of four main steps: 1) A five-level DWT is applied to an image to zoom out the low frequency sub-band and increase the number of high frequency sub-bands to facilitate the compression process; 2) The Hexa data compression algorithm is applied to each high frequency sub-band independently by using five different keys to reduce each sub-band to1/6of its original size; 3) Build a look up table of probability data to enable decoding of the original high frequency sub-bands, and 4) Apply arithmetic coding to the outputs of steps (2) and (3). At decompression stage a fast matching search algorithm is used to reconstruct all high frequency sub-bands. We have tested the technique on 2D images including streaming from videos (YouTube). Results show that the proposed crypto-compression method yields high compression ratios up to 99% with high perceptual quality images.
| Item Type: | Article |
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| Additional Information: | ** From Springer Nature via Jisc Publications Router ** Licence for this article: https://creativecommons.org/licenses/by/4.0/ **Journal IDs: pissn 1380-7501; eissn 1573-7721 **Article IDs: publisher-id: s11042-019-08405-3; manuscript: 8405 **History: published 03-2020; online 12-12-2019; published_online 12-12-2019; registration 31-10-2019; accepted 22-09-2019; rev-recd 29-07-2019; submitted 26-07-2018 |
| Uncontrolled Keywords: | Article, 2D image compression, DWT, Hexadata encoding, Fast matching search |
| Identification Number: | https://doi.org/10.1007/s11042-019-08405-3 |
| Page Range: | 6045-6059 |
| SWORD Depositor: | Colin Knott |
| Depositing User: | Colin Knott |
| Date Deposited: | 08 Jun 2020 14:21 |
| Last Modified: | 18 Mar 2021 01:32 |
| URI: | https://shura.shu.ac.uk/id/eprint/26412 |
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