原文传递
Intelligent Transportation Systems Data Compression Using Wavelet Decomposition Technique.
| 题名： | Intelligent Transportation Systems Data Compression Using Wavelet Decomposition Technique. |
| 作者： | Qiao-F.; Liu-H.; Yu-L. |
| 关键词： | *Wavelet-decomposition; *Signal-distortion; *Data-compression.;Compression-ratio; Threshold-selection; Tables-Data; Figures-; Recommendations-; Wavelet-analysis; Case-studies. |
| 摘要： | Intelligent Transportation Systems (ITS) generates massive amounts of traffic data, which posts challenges for data storage, transmission and retrieval. Data compression and reconstruction technique plays an important role in ITS data procession. Traditional compression methods have been utilized in Transportation Management Centers (TMCs), but the data redundancy and compression efficiency problems remain. In this report, the wavelet incorporated ITS data compression method is initiated. The proposed method not only makes use of the conventional compression techniques but, in addition, incorporates the one-dimensional discrete wavelet compression approach. Since the desired wavelet compression is a lossy algorithm, the balancing between the compression ratio and the signal distortion is exceedingly important. During the compression process, the determination of the threshold is the key issue that affects both the compression ratio and the signal distortion. An algorithm is proposed that can properly select the threshold by balancing the two contradicted aspects. Three performance indexes are constructed and the relationships between the three indices and the threshold are identified in the algorithm. A MATLAB program with the name Wavelet Compression for ITS Data (WCID) has been developed to facilitate the compression tests. A case study on TransGuide ITS data was put into play and a final compression ratio of less than one percent on the trade-off threshold value shows that the proposed approach is practical. Finally, the threshold selection algorithm can be further tuned up utilizing Autoregressive model so that the quality of reconstructed data can be improved with a minor overhead of saving only a few parameters. |
| 报告类型： | 科技报告 |
相关文献
- WIRELESS TRANSMISSION OF IMAGE AND VIDEO DATA.
- Artificial Intelligence and Advanced Computing Applications. Transportation Research Record. Journal of the Transportation Research Board, No. 1968.
- Wavelet-Transform-Based Power Management of Hybrid Vehicles with Multiple On-board Energy Sources Including Fuel Cell, Battery and Ultracapacitor
- WAVELET-BASED VIDEO COMPRESSION AND ANALYSIS SYSTEM FOR AITS.
- Mixed models and recugion techniques for large-rotation, nonlinear analysis of shells of revolution with application to tires
- IMAGE COMPRESSION FOR STORAGE TRANSMISSION OF DIGITAL IMAGES.
检索历史
应用推荐
