本文選題：Unity + 3D�。� 參考：《北京交通大學》2017年碩士論文

【摘要】：隨著計算機技術(shù)、互聯(lián)網(wǎng)技術(shù)的快速不斷發(fā)展,虛擬現(xiàn)實技術(shù)逐漸趨向于成熟與完善,并廣泛應用于生活中的各個領域。目前,虛擬現(xiàn)實技術(shù)已經(jīng)觸及到了遠程醫(yī)療活動,并成為遠程醫(yī)療活動中的另一種直觀有效的服務形式。本文通過對遠程醫(yī)療應用現(xiàn)狀和虛擬現(xiàn)實技術(shù)的研究,將三維器官模型和虛擬現(xiàn)實技術(shù)相結(jié)合,設計并實現(xiàn)了一個基于Unity 3D的遠程醫(yī)療系統(tǒng)。不同于傳統(tǒng)的遠程醫(yī)療系統(tǒng),該系統(tǒng)的運用能夠?qū)崿F(xiàn)遠距離共享三維手術(shù)畫面。不同區(qū)域的醫(yī)護人員只需要通過網(wǎng)絡操作就可以實現(xiàn)虛擬的手術(shù)環(huán)境,不僅可以全面展示手術(shù)場景,還可以從任意方向和角度來觀察,從而降低醫(yī)療費用、節(jié)省時間;該系統(tǒng)還能運用在醫(yī)療教學活動中,應用于手術(shù)培訓、手術(shù)預演、臨床診斷、醫(yī)學輔助教學等環(huán)節(jié)。因此,設計遠程醫(yī)療系統(tǒng)具有很高的實踐意義和價值。本文的主要的工作成果有以下4方面:(1)研究了主流三維虛擬開發(fā)工具的功能及使用場景。對比目前主流的三維虛擬開發(fā)工具的特征與性能,選擇了具有跨平臺、編輯器友好、性能穩(wěn)定等優(yōu)勢的Unity 3D作為系統(tǒng)的開發(fā)平臺。(2)設計并實現(xiàn)了一個基于Unity 3D的會議系統(tǒng)。對于系統(tǒng)部署的網(wǎng)絡環(huán)境,針對P2P網(wǎng)絡通信特點,分析并提出NAT穿透的解決方案,并在此基礎之上,設計數(shù)據(jù)分發(fā)網(wǎng)絡,明確消息分發(fā)機制和傳遞途徑,實現(xiàn)了適用于復雜網(wǎng)絡環(huán)境的會議平臺。(3)設計并實現(xiàn)了基于AssetBundle的畫面更新機制。設計Frame同步模型,利用AssetBundle對多Prefab模型進行封裝與解包,結(jié)合序列化與反序列化方法,實現(xiàn)畫面從網(wǎng)絡中快速更新。(4)實現(xiàn)了多終端下三維手術(shù)畫面的實時同步。通過Unity 3D中Prefab模型將手術(shù)導航場景設置為預設并封裝,生成XML配置文件,利用數(shù)據(jù)分發(fā)網(wǎng)絡提供的通信服務,完成畫面的Serialization和Deserialization,實時同步三維手術(shù)畫面。本文最后采用動態(tài)測試的方法對系統(tǒng)進行了功能測試,設計的數(shù)據(jù)分發(fā)網(wǎng)絡能在較復雜的網(wǎng)絡環(huán)境下傳輸畫面數(shù)據(jù),轉(zhuǎn)發(fā)性能上有較大提升。手術(shù)畫面的同步延時在300ms左右,能滿足遠程醫(yī)療系統(tǒng)的要求。
[Abstract]:With the rapid development of computer technology and Internet technology, virtual reality technology gradually tends to mature and perfect, and is widely used in every field of life.At present, virtual reality technology has touched on telemedicine activities, and has become another kind of intuitive and effective service form in telemedicine activities.In this paper, a telemedicine system based on Unity 3D is designed and implemented based on the research of the status quo of telemedicine application and virtual reality technology, combining 3D organ model with virtual reality technology.Different from the traditional telemedicine system, the application of this system can realize long-distance sharing of three-dimensional surgical images.Doctors and nurses in different areas can realize virtual operation environment only through network operation, which can not only show the operation scene, but also can be observed from any direction and angle, so as to reduce the medical cost and save time.The system can also be used in medical teaching activities, surgery training, surgical preview, clinical diagnosis, medical assistant teaching and so on.Therefore, the design of telemedicine system has high practical significance and value.The main results of this paper are as follows: 1) the functions and usage scenarios of mainstream 3D virtual development tools are studied.Compared with the features and performance of the current mainstream 3D virtual development tools, Unity 3D, which has the advantages of cross-platform, friendly editor and stable performance, is selected as the development platform of the system and a conference system based on Unity 3D is designed and implemented.For the network environment of system deployment, according to the characteristics of P2P network communication, the solution of NAT penetration is analyzed and put forward. On this basis, the data distribution network is designed, and the message distribution mechanism and transmission path are defined.The design and implementation of AssetBundle based picture updating mechanism are presented.The Frame synchronization model is designed, the multi-#en2# model is encapsulated and unpacked by AssetBundle, and the method of serialization and deserialization is combined to realize the real-time synchronization of 3D surgical images under multiple terminals by rapidly updating the images from the network.The operation navigation scene is set to preset and encapsulated by Prefab model in Unity 3D, the XML configuration file is generated, and the communication service provided by the data distribution network is used to complete the Serialization and Deserialization of the screen and synchronize the 3D operation picture in real time.In the end, the function of the system is tested by the method of dynamic test. The designed data distribution network can transmit picture data in more complex network environment, and the forwarding performance is greatly improved.The synchronous delay of operation screen is about 300ms, which can meet the requirements of telemedicine system.
【學位授予單位】：北京交通大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TP311.52

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