Image Compression Algorithm of High-Speed SPIHT for Aerial Applications
| Autor: | 金龙旭 Jin Long-xu, 陶宏江 Tao Hong-jiang, 吴银花 Wu Yin-hua, 张宁 Zhang Ning |
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| Rok vydání: | 2011 |
| Předmět: |
Computer science
ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Data_CODINGANDINFORMATIONTHEORY Electronic Optical and Magnetic Materials Set partitioning in hierarchical trees Wavelet Compression (functional analysis) Encoding (memory) Signal Processing Image compression algorithm Instrumentation Algorithm Bitwise operation Spiht algorithm |
| Zdroj: | Chinese Journal of Liquid Crystals and Displays. 26:847-852 |
| ISSN: | 1007-2780 |
| Popis: | SPIHT and NLS(Not List SPIHT) are efficient image compression algorithms,but the algorithms application is limited by the shortcomings of the poor error resistance and slow compression speed in the aviation areas.In this paper,the error resilience and the compression speed were improved.The remote sensing images were decomposed by Le Gall5/3 wavelet,and wavelet coefficients were indexed,scanned and allocated by the means of family blocks.The bit-plane importance was predicted by bitwise OR,so the N bit-planes can be encoded at the same time.Compared with the SPIHT algorithm,this modified algorithm is easy implemented by hardware.The experiments results show that the PSNR of reconstructed images was increased about 0.2 to 0.6 db and the speed was 4~6 times faster than the SPIHT encoding process.The speed can be further improved via virtue of the parallelism and pipelining,when it is implemented by the hardware. |
| Databáze: | OpenAIRE |
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