本文選題：數(shù)字人體模型 + 三維人體掃描��； 參考：《哈爾濱工業(yè)大學(xué)》2014年碩士論文

【摘要】：數(shù)字人體模型作為計算機(jī)輔助人體工學(xué)領(lǐng)域重要的工具，可應(yīng)用于產(chǎn)品與系統(tǒng)設(shè)計、工效學(xué)分析、性能評估與故障診斷等。傳統(tǒng)的數(shù)字人體建模技術(shù)多采用參數(shù)化手段，，建模過程需要人體尺寸統(tǒng)計學(xué)規(guī)律作為外部約束條件，并需要建立龐大的人體模板數(shù)據(jù)庫，存在開發(fā)周期長、成本高昂且難以保證模型逼真度等問題。近年來，隨著三維測量技術(shù)的發(fā)展，出現(xiàn)了基于三維人體掃描數(shù)據(jù)的建模方式，此類方法無需外部約束條件或人體模板，構(gòu)建的模型具有較高的逼真度。 目前，基于掃描數(shù)據(jù)所生成的模型多不具備運(yùn)動性能或運(yùn)動性能較差。針對該問題，本文提出了一種基于掃描數(shù)據(jù)的個性化數(shù)字人體運(yùn)動模型生成方法，該方法包括模型結(jié)構(gòu)設(shè)計與模型構(gòu)建兩部分。 首先，介紹了數(shù)字人體模型結(jié)構(gòu)的設(shè)計方法。整個模型為骨架-皮膚雙層結(jié)構(gòu)：內(nèi)層的骨架模型為鏈?zhǔn)浇Y(jié)構(gòu)，具有多個關(guān)節(jié)與自由度，用于整個模型的運(yùn)動驅(qū)動；外層的皮膚模型由三角網(wǎng)格組成，用于表達(dá)模型的體表信息。模型的運(yùn)動控制分為兩部分：對骨架模型進(jìn)行剛性變形控制；對皮膚模型采用剛性變形與局部變形結(jié)合的變形控制方法。 其次，介紹了數(shù)字人體模型的構(gòu)建方法。通過從掃描數(shù)據(jù)中提取的人體骨骼特征點(diǎn)計算骨架模型的各關(guān)節(jié)位置，生成骨架模型。以骨架模型的各骨骼段為單位，將外部掃描數(shù)據(jù)分段，篩選出各段掃描數(shù)據(jù)中的特定位置、特定數(shù)量的數(shù)據(jù)點(diǎn)構(gòu)造該骨骼段的外部皮膚網(wǎng)格。 最后，介紹了基于本文所提方法的數(shù)字人體模型生成軟件。該軟件可實(shí)現(xiàn)數(shù)字人體模型的生成、運(yùn)動控制與圖形化顯示。利用該軟件完成了數(shù)字人體模型構(gòu)建實(shí)驗(yàn)并對實(shí)驗(yàn)結(jié)果進(jìn)行了測試與分析。 實(shí)驗(yàn)分析表明，本文方法所構(gòu)建的模型具有如下優(yōu)點(diǎn)：具有較好的運(yùn)動性能，可以模擬真實(shí)人體較為復(fù)雜的姿態(tài)變化，且在運(yùn)動過程中具有良好的皮膚變形特性；與真實(shí)對象具有較高的幾何相似度；具有較小的數(shù)據(jù)量與運(yùn)算量，可支持實(shí)時運(yùn)動控制。該模型在計算機(jī)輔助人體工學(xué)領(lǐng)域的運(yùn)動仿真與姿態(tài)模擬研究中具有較大的應(yīng)用價值。
[Abstract]:As an important tool in the field of computer aided human engineering, digital human model can be used in product and system design, ergonomics analysis, performance evaluation and fault diagnosis. The traditional digital human body modeling technology mostly uses parameterized means, the modeling process needs the human body size statistics law as the external constraint condition, and needs to establish the huge human body template database, the existence development period is long, The cost is high and it is difficult to guarantee the fidelity of the model. In recent years, with the development of 3D measurement technology, a modeling method based on 3D human body scanning data has emerged. This method does not require external constraints or human templates, and the constructed model has a high fidelity. At present, most models based on scanning data have no or poor motion performance. To solve this problem, this paper proposes a personalized digital human motion model generation method based on scanning data, which includes two parts: model structure design and model construction. Firstly, the design method of digital human model structure is introduced. The whole model is a skeleton-skin double layer structure: the inner skeleton model is a chain structure with multiple joints and degrees of freedom, which is used to drive the whole model, and the outer skin model is composed of triangular meshes. The body surface information used to express the model. The motion control of the model is divided into two parts: rigid deformation control for skeleton model and deformation control method combining rigid deformation and local deformation for skin model. Secondly, the construction method of digital human body model is introduced. The joint position of the skeleton model is calculated by extracting the human skeleton feature points from the scanning data, and the skeleton model is generated. Taking each skeleton segment of the skeleton model as a unit, the external scanning data is segmented, and the specific position and number of data points in each segment scan data are selected to construct the external skin mesh of the bone segment. Finally, the digital human model generation software based on the proposed method is introduced. The software can realize the generation of digital human body model, motion control and graphical display. The software is used to build the digital human body model and the experimental results are tested and analyzed. Experimental analysis shows that the model constructed by this method has the following advantages: it has better motion performance, can simulate the complex posture changes of real human body, and has good skin deformation characteristics in the process of motion; It has high geometric similarity with real objects, small amount of data and computation, and can support real-time motion control. The model has great application value in the research of motion simulation and attitude simulation in the field of computer aided ergonomics.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TB18;TP391.7

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