Onboard image compression schemes for modular airborne imaging spectrometer (MAIS) based on wavelet transform

Zhenyu Zhu; Jianyu Wang

doi:10.1117/12.258079

13 November 1996 Onboard image compression schemes for modular airborne imaging spectrometer (MAIS) based on wavelet transform

Zhenyu Zhu, Jianyu Wang

Author Affiliations +

Proceedings Volume 2819, Imaging Spectrometry II; (1996) https://doi.org/10.1117/12.258079
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

In this paper, two compression schemes are presented to meet the urgent needs of compressing the huge volume and high data rate of imaging spectrometer images. According to the multidimensional feature of the images and the high fidelity requirement of the reconstruction, both schemes were devised to exploit the high redundancy in both spatial and spectral dimension based on the mature wavelet transform technology. Wavelet transform was applied here in two ways: First, with the spatial wavelet transform and the spectral DPCM decorrelation, a ratio up to 84.3 with PSNR > 48db's near-lossless result was attained. This is based ont he fact that the edge structure among all the spectral bands are similar while WT has higher resolution in high frequency components. Secondly, with the wavelet's high efficiency in processing the 'wideband transient' signals, it was used to transform the raw nonstationary signals in the spectral dimension. A good result was also attained.

Citation Download Citation

Zhenyu Zhu and Jianyu Wang "Onboard image compression schemes for modular airborne imaging spectrometer (MAIS) based on wavelet transform", Proc. SPIE 2819, Imaging Spectrometry II, (13 November 1996); https://doi.org/10.1117/12.258079

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