Efficient Embedded Image Compression Using Optimal Reversible Biorthogonal Integer Wavelet Transform

2006 ◽  
Author(s):  
Li-bao Zhang ◽  
Xian-chuan Yu
Keyword(s):  
Wavelet Transform ◽  
Image Compression ◽  
Integer Wavelet Transform ◽  
Embedded Image ◽  
Integer Wavelet

An Improved Method for Remote Sensing Image Compression

2014 ◽  
Vol 543-547 ◽  
pp. 2681-2686
Author(s):  
Shuai Xue ◽  
Qing Dai
Keyword(s):  
Remote Sensing ◽  
Wavelet Transform ◽  
Image Compression ◽  
Text Analysis ◽  
Image Data ◽  
Remote Sensing Image ◽  
Integer Wavelet Transform ◽  
Improved Method ◽  
Integer Wavelet ◽  
And Storage

Consider of the characteristics of quantity of remote sensing image data, in order to transport and storage them easily, the text analysis and research some compression technology about remote sensing image, and make compares among them, then propose an optimized method based on integer wavelet transform about image compression. This method encodes the lowest frequency sub-band and high.

Image compression and encryption based on integer wavelet transform and hybrid hyperchaotic system

2021 ◽  
Vol 17 (3) ◽  
pp. 219-234
Author(s):  
Rajamandrapu Srinivas ◽  
N. Mayur
Keyword(s):  
Wavelet Transform ◽  
Image Compression ◽  
Fractional Order ◽  
Cellular Neural Network ◽  
Hyperchaotic System ◽  
Integer Wavelet Transform ◽  
Pseudorandom Sequences ◽  
Effective Performance ◽  
Integer Wavelet ◽  
Image Compression And Encryption

Compression and encryption of images are emerging as recent topics in the area of research to improve the performance of data security. A joint lossless image compression and encryption algorithm based on Integer Wavelet Transform (IWT) and the Hybrid Hyperchaotic system is proposed to enhance the security of data transmission. Initially, IWT is used to compress the digital images and then the encryption is accomplished using the Hybrid Hyperchaotic system. A Hybrid Hyperchaotic system; Fractional Order Hyperchaotic Cellular Neural Network (FOHCNN) and Fractional Order Four-Dimensional Modified Chua’s Circuit (FOFDMCC) is used to generate the pseudorandom sequences. The pixel substitution and scrambling are realized simultaneously using Global Bit Scrambling (GBS) that improves the cipher unpredictability and efficiency. In this study, Deoxyribonucleic Acid (DNA) sequence is adopted instead of a binary operation, which provides high resistance to the cipher image against crop attack and salt-and-pepper noise. It was observed from the simulation outcome that the proposed Hybrid Hyperchaotic system with IWT demonstrated more effective performance in image compression and encryption compared with the existing models in terms of parameters such as unified averaged changed intensity, a number of changing pixels rate, and correlation coefficient.

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