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Content Provider | IET Digital Library |
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Author | Thakur, Vikrant Singh Gupta, Shubhrata Thakur, Kavita |
Abstract | The image compression performance of transform coders highly depends on the energy compaction (EC) capability of transforms. The popular transforms such as discrete cosine transform (DCT) and discrete wavelet transform (DWT) provide decent EC; however, their capability is not enough to deliver good quality image reconstruction for higher compression levels (CLs). In this study, the authors propose a new hybrid transform which is a fusion of wavelet packet transform (WPT) and block-DCT (BDCT) transform to achieve high-quality image compression. This new hybrid WPT-BDCT transform is able to attain higher EC than the existing transforms. Further, the authors have found a new energy compaction index (ECI) to evaluate the energy compactness of the image transforms. The proposed hybrid transform has been extensively evaluated, based on proposed ECI parameter, the visual quality assessment of reconstructed images and with the standard image quality indexes peak-signal-to-noise ratio and structural similarity index measure. It is reported that the proposed hybrid transform provides higher EC and outperforms the transforms namely DCT, DWT, WPT, multi-wavelet transform and existing hybrid transforms for all the CLs. |
Starting Page | 899 |
Ending Page | 909 |
Page Count | 11 |
ISSN | 17519659 |
Volume Number | 11 |
e-ISSN | 17519667 |
Issue Number | Issue 10, Oct (2017) |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-ipr/11/10 |
Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-ipr.2016.0740 |
Journal | IET Image Processing |
Publisher Date | 2017-06-01 |
Access Restriction | Open |
Rights Holder | © The Institution of Engineering and Technology |
Subject Keyword | Compression Levels Computer Vision And Image Processing Technique Data Compression Discrete Cosine Transform Discrete Wavelet Transform DWT EC Capability ECI Energy Compaction Energy Compaction Index High Quality Image Compression Hybrid WPT-BDCT Transform Image And Video Coding Image Coding Image Reconstruction Image Transforms Integral Transforms Standard Image Quality Indexes Transform Coders Visual Quality Assessment Wavelet Packet Transform |
Content Type | Text |
Resource Type | Article |
Subject | Signal Processing Electrical and Electronic Engineering Computer Vision and Pattern Recognition Software |
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