Design of an Error-Tolerance Scheme for Discrete Wavelet Transform in JPEG 2000 Encoder

2011 ◽  
Vol 60 (5) ◽  
pp. 628-638 ◽  
Author(s):  
Chun-Lung Hsu ◽  
Yu-Sheng Huang ◽  
Ming-Da Chang ◽  
Hung-Yen Huang
Keyword(s):  
Wavelet Transform ◽  
Discrete Wavelet Transform ◽  
Error Tolerance ◽  
Discrete Wavelet ◽  
Jpeg 2000

Study of the Discrete Wavelet Transform Based on JPEG2000 Image Compression Algorithm

2013 ◽  
Vol 464 ◽  
pp. 411-415
Author(s):  
Jin Cai ◽  
Shuo Wang
Keyword(s):  
Wavelet Transform ◽  
Image Compression ◽  
Discrete Wavelet Transform ◽  
Image Coding ◽  
Dynamic Range ◽  
Compression Algorithm ◽  
Discrete Wavelet ◽  
Coding System ◽  
Jpeg 2000 ◽  
Image Compression Algorithm

JPEG 2000 is a new image coding system that uses state-of-the-art compression techniques based on wavelet technology. As interactive multimedia technologies evolve, the requirements for the file format used to store the image data continue to evolve. The size and bit depth collected for an image to increase the resolution and extend the dynamic range and color gamut. Discrete Wavelet transform based embedded image coding method is the basis of JPEG2000. Image compression algorithm for the proper use and display of the image is a requirement for digital photography.

scholarly journals Hybrid Adaptive Lossless Image Compression Based on Discrete Wavelet Transform

Entropy ◽  
2020 ◽  
Vol 22 (7) ◽  
pp. 751 ◽  
Author(s):  
Roman Starosolski
Keyword(s):  
Wavelet Transform ◽  
Image Compression ◽  
Discrete Wavelet Transform ◽  
Discrete Wavelet ◽  
Jpeg 2000 ◽  
Lossless Image Compression ◽  
Photographic Images ◽  
Screen Content ◽  
Compression Time ◽  
The Cost

A new hybrid transform for lossless image compression exploiting a discrete wavelet transform (DWT) and prediction is the main new contribution of this paper. Simple prediction is generally considered ineffective in conjunction with DWT but we applied it to subbands of DWT modified using reversible denoising and lifting steps (RDLSs) with step skipping. The new transform was constructed in an image-adaptive way using heuristics and entropy estimation. For a large and diverse test set consisting of 499 photographic and 247 non-photographic (screen content) images, we found that RDLS with step skipping allowed effectively combining DWT with prediction. Using prediction, we nearly doubled the JPEG 2000 compression ratio improvements that could be obtained using RDLS with step skipping. Because for some images it might be better to apply prediction instead of DWT, we proposed compression schemes with various tradeoffs, which are practical contributions of this study. Compared with unmodified JPEG 2000, one scheme improved the compression ratios of photographic and non-photographic images, on average, by 1.2% and 30.9%, respectively, at the cost of increasing the compression time by 2% and introducing only minimal modifications to JPEG 2000. Greater ratio improvements, exceeding 2% and 32%, respectively, are attainable at a greater cost.

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