| Development of multi-touch technology is mainly limited by two aspects: First,the hardware, mainly related to the system what kind of hardware technology, thehardware structure, environmental constraints, running fluency and runs smoothlyunder the premise of acceptable touch points; software involved in the implementationof multi-touch, touch point tracking and identification, the establishment of auniversal rational multi-touch gesture library, create a system fault-tolerantmechanism to ensure the normal gesture recognition hardware environment isunstable and in the case of user errors instructions.The multi-touch hardware form more and more diversified, multi-touch softwareis also increasingly rich, whether a better experience to the user through the softwareand applications is an important factor to determine the development of touchtechnology. Currently supports multi-touch system, the lack of an ideal descriptionand parsing of the meaning of touch gestures to multi-point operation instructionparsing are to be judged within the program code, which brings a series of questions:such as the various procedures for multi-point instructions to judge the ideas prone toconfusion; when running multi-point program need to run a different trajectoryinterpretation of the driver software; running multiple multi-point program instructionmistaken judgment; the accuracy of the multi-touch operation, image stabilization,anti mistakenly judge is not satisfied with.To solve the above problem, this paper,"Bank of Qingdao City, multi-touchmultimedia display system","China Ocean University of Technology Laboratory ofmulti-point touch booth "," China Ocean University Academic Exchange Centermulti-touch multimedia presentations system "and" Qingdao City, Communist Partyof Memorial multi-touch multimedia display system "project is based on acomprehensive analysis on the optical touch environment based on the structures of FTIR principles and structures based on LLP principles of multi-touch systemenvironment gesture recognition algorithm of the multi-touch environment, as well asmulti-touch system of GIS display system application development. This paperstudies the work and achievements are as follows：In this paper, based on multi-touch gestures action touch gesture features foranalysis, the standardized description of18commonly used multi-touch gestures,gestures characteristic clear and static gesture recognition and dynamic gesturerecognition method according to their characteristics.This paper presents a way to set the contact displacement and time functions,dual-threshold method to improve the accuracy of the identification of contacts, toprevent the sudden increase in the noise of mistaken judgment, and slow the jittergenerated by excessive operating.In this paper, RBF neural network model to solve the problem of dynamicgesture recognition, and the introduction of statistics based on the clustering of theEuclidean distance function as the characteristic parameters of the network, greatlyimproving the multi-touch gesture recognition efficiency and accuracy.This paper has developed the "optical touch system based on ArcGIS Enginetwo-dimensional display system" and "Windows7system of WPF multi-touchthree-dimensional GIS display system. These two software comparison analysis formulti-touch gesture command, combined with practical application to verify thefeasibility and effectiveness of the proposed algorithm. |
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