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An image compression method for space multispectral time delay and integration charge coupled device camera
Institution:[1]Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China [2]Graduate University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:Multispectral time delay and integration charge coupled device(TDICCD) image compression requires a lowcomplexity encoder because it is usually completed on board where the energy and memory are limited.The Consultative Committee for Space Data Systems(CCSDS) has proposed an image data compression(CCSDS-IDC) algorithm which is so far most widely implemented in hardware.However,it cannot reduce spectral redundancy in multispectral images.In this paper,we propose a low-complexity improved CCSDS-IDC(ICCSDS-IDC)-based distributed source coding(DSC) scheme for multispectral TDICCD image consisting of a few bands.Our scheme is based on an ICCSDS-IDC approach that uses a bit plane extractor to parse the differences in the original image and its wavelet transformed coefficient.The output of bit plane extractor will be encoded by a first order entropy coder.Low-density parity-check-based Slepian-Wolf(SW) coder is adopted to implement the DSC strategy.Experimental results on space multispectral TDICCD images show that the proposed scheme significantly outperforms the CCSDS-IDC-based coder in each band.
Keywords:multispectral CCD images  Consultative Committee for Space Data Systems-image data compression(CCSDS-IDC)  distributed source coding(DSC)
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