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| Adaptive segmentation of radar return and hybrid coding scheme |
| Xue Jianru; Zheng Nanning; Quan Wei |
| Institute of Aritificial Intelligence and Robot Xi an Jiaotong University Xi an 710049 China |
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Abstract In this paper, an adaptive segmentating, hybrid coding scheme of radar return is presented. Firstly, radar return is divided into two classes by adaptive Gaussian mixture model: foreground and background, the former is composed of moving targets, while the later is composed of still objects and repeat motion. Then Integer-to-integer wavelet transform is used for de-correlating the background and foreground, and an improved SPIHT codec is also used in coding wavelet coefficients of foreground in lossless way and wavelet coefficients of background in loss way. Experimental results show the scheme in this paper is better than codec based on SPIHT directly, and the PSNR of the reconstructed image is also increased about 0.3-0.5dB in average under the same bit rate compared with that of the latter one.
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Received: 15 March 2002
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2003, Vol. 25 
