超分辨率扫描成像系统图像无损压缩算法研究

RESEARCH ON LOSSLESS IMAGE COMPRESSION ALGORITHM IN SUPER-RESOLUTION SCANNING IMAGING SYSTEM

针对光纤耦合的超分辨率扫描成像系统因传输的数据量过大而导致的丢帧现象,引入无损压缩技术对耦合的图像数据进行压缩传输。系统采用可逆的整数小波变换和集合树分裂算法组成的无损压缩方案,并根据耦合成像的特性,对耦合图像进行分割处理,以满足系统对压缩效率的要求。图像的平均压缩比达到了2.3,传输的波特率降到200 Mbps,目前系统提供的256 Mbps的带宽已经完全满足需求。实验结果表明,无损压缩编解码器的引入,降低了光纤耦合系统对传输带宽的要求,并保证了图像的完全重构。

Concerning the frame loss phenomenon of super-resolution scanning imaging system with optical fibre bundle coupling due to transmitted data flooding, we introduce lossless compression technology to compress and transmit coupling image data. The system uses the lossless compression solution which is comprised of the reversible integer wavelet transform and the set partitioning in hierarchical trees （SPIHT） algorithm and makes segmentation and processing on coupling image according to the feature of the coupling imaging for meeting the demand of the system on compression efficiency. The average image compression ratio reaches 2.3 and the transmitted baud rate is down to 200 Mbps, the bandwidth of 256 Mbps supplied by the system has been fully met the demand. Experimental results show that the introduction of the lossless codec reduces the demand of the fibre coupling system on transmission bandwidth and guarantees the perfect reconstruction of image.