Research On Remote Visualization Of 3D Seismic Volume Data For Multi-viewpoint Interaction

With the development of seismic exploration and signal collection,the scale of seismic data becomes larger and larger,while the mobile computing platform in exploration and exploitation field is difficult to visualize large scale seismic volume data interactively.The improvement of network technology makes remote visualization possible,which provides a new solution for realizing the portable visualization of large-scale data.Remote visualization of seismic volume should provide a high quality and fast visualization analysis service for multiple users at the same time.The main challenges include: the management of shared data by multiple clients,efficient processing of interaction requests from multiple users,parallel scheduling of rendering tasks and fast transmission of generated images.To solve these problems,the following works are carried out:(1)The caching mechanism of shared data is established to manage and maintain the data that required by each user and to minimize data redundancy as well as reuse data.Meanwhile it can effectively reduce the repeated reading process of volume data and the related calculation of visual mapping,thereby the waste of system storage resources and computational resources can be minimized.(2)The visualization service unit is designed to package computational resources for each client’s rendering process and response each user’s interaction request for remote visualization in parallel.(3)According to the multi-viewpoint interactions from different users,a strategy of parallel rendering task scheduling,combining the correlation between two volume data sets from different tasks,is proposed to further improve the reusability of the volume data and texture objects,so that the utilization of server storage resources and efficiency of parallel rendering can be improved.(4)The compression and transmission method of scene image based on the priority coding of ROI is designed.By use of progressive transmission approach and JPEG2000 standard,the user’s ROI can be preferentially received and displayed by client-side under the condition of limited network bandwidth,which can enhance the visual interaction experience.In the end,a remote visualization prototype system of large-scale seismic volume data is realized on the basis of the above research,and the key techniques are tested and evaluated to verify the rationality and effectiveness of the designs.