Data Compression for Time-Stretch Imaging Based on Differential Detection and Run-Length Encoding

作者：Dai, Bo; Yin, Songchao; Gao, Zhensen; Wang, Kaimin; Zhang, Dawei; Zhuang, Songlin; Wang, Xu^*

来源：Journal of Lightwave Technology, 2017, 35(23): 5098-5104.

DOI：10.1109/JLT.2017.2768382

• Imaging system
• optical signal processing
• ultrafast measurements

A high-fidelity data compression method based on differential detection and run-length encoding is proposed for a time-stretch imaging system, where a spatial image is mapped to the time domain and then read out by a balanced photodetector for image reconstruction. Differential detection is capable of distinguishing discrepancy of consecutive scans and eliminating identical signals. After the detection, run-length encoding merges consecutive identical data to a single data. In the experiment, a 77.76-MHz line-scan imaging system is demonstrated. The compression ratio of more than 3.8 is achieved. After the data decompression, the image of high fidelity can be reconstructed.

• 出版日期2017-12-1
• 单位上海理工大学