Optimisation of mobile intelligent terminal data pre-processing methods for crowd sensing

CAAI Transactions on Intelligence Technology

article

Min Huang¹  Yuefan Zeng¹  Lina Chen¹  Bo Sun² 

[1] School of Software Engineering, South China University of Technology;Research Institute of International Services Outsourcing, Guangdong University of Foreign Studies

关键词: median filters;    filtering theory;    data compression;    mobile computing;    optimisation;    image denoising;    crowd sensing application;    existing studies;    sensor data pre-processing optimisation problems;    crowd-sensing process;    improved sliding average method;    data compression;    time complexity;    dynamic window;    improved processing time;    filter window;    improved extremum median filtering method;    time-consuming problem;    demarcation points;    data points;    data transmission;    mobile terminal;    crowd-sensing environment;    mobile intelligent terminal data pre-processing methods;    essential phase;    B6135 Optical;    image and video signal processing;    B6140B Filtering methods in signal processing;    C5260B Computer vision and image processing techniques;   

DOI  :  10.1049/trit.2018.0013

学科分类：数学（综合）

来源: Wiley

【 摘 要 】

Sensor data pre-processing is an essential phase of crowd sensing application. Existing studies do not effectively solve the problem, and there still exist various sensor data pre-processing optimisation problems at the acquisition end in crowd-sensing process. This study presents an improved sliding average method to achieve data compression and reduce the time complexity by using a dynamic window with improved processing time. Through adopting locally sorting and gradient change of the filter window, an improved extremum median filtering method is proposed to relieve the time-consuming problem when denoising high pixel images. A transmission strategy for optimisation is also proposed, in which only the demarcation points of each group of data and the data points with large differences when comparing with the demarcation points are recorded. This strategy reduces the storage pressure and the amount of data transmission of mobile terminal and improves the efficiency of data transmission. The experimental results show that their methods have higher speed and lower cost, and thus they can run better in crowd-sensing environment.

【 授权许可】

CC BY|CC BY-ND|CC BY-NC|CC BY-NC-ND