基于增强现实的虚拟眼镜试戴技术研究

发布时间：2018-03-21 07:41

本文选题：增强现实　切入点：虚拟眼镜试戴　出处：《大连海事大学》2017年硕士论文　论文类型：学位论文

【摘要】：近些年电商迅猛发展,虚拟试戴技术应运而生。本文通过将虚拟眼镜结合到视频流中,利用增强现实技术,达到虚拟眼镜试戴的效果。使用户可以实时进行人机交互,用户的购镜体验得到提升。本文主要的研究工作如下:在人脸检测阶段,本文采用基于Hog特征的AdaBoost级联分类器与SVM分类器组合的人脸检测方法,该方法在降低漏检率的同时也降低了误检率,使人脸检测的准确率得到提高。在人脸对齐阶段,采用鲁棒性较好的SIFT算法做局部特征提取,结合SDM算法对特征点对齐迭代求精,训练出更加精确的特征点对齐模型,人脸对齐的精度相对传统ASM方法更高。本文提出了基于姿态估计的虚拟眼镜处理。并从两个阶段进行介绍,首先对头部进行姿态估计。由于本文采用基于几何投影的姿态估计方法,在进行姿态估计的过程中,使用L-M优化算法解非线性最小二乘法,拟合性更好,姿态估计更加准确。在虚拟眼镜处理阶段,本文提出利用姿态估计得出的旋转角度,对眼镜图像进行适当的透视变换,使其在呈现出三维效果的同时,避免了夸张变形的状况。将眼镜腿与眼镜组合,在头部旋转时,根据旋转角度计算出眼镜腿的显示长度,给用户以三维立体的眼镜试戴效果。最后本文将虚拟眼镜试戴技术应用到眼镜试戴系统中,设计完成一个简单的虚拟眼镜试戴系统。通过实验发现,本文采用的虚拟眼镜试戴技术可达到用户的要求,并能展现出令人满意的试戴效果。
[Abstract]:In recent years, the rapid development of e-commerce, virtual wear technology came into being. This paper combines virtual glasses into video stream, using augmented reality technology, to achieve the effect of virtual glasses, so that users can real-time human-computer interaction. The main research work of this paper is as follows: in the phase of face detection, we adopt the combination of AdaBoost cascade classifier based on Hog features and SVM classifier. This method not only reduces the false detection rate, but also reduces the false detection rate, which improves the accuracy of human face detection. In the phase of face alignment, the robust SIFT algorithm is used for local feature extraction, and the SDM algorithm is used to align the feature points for iterative refinement. A more accurate feature point alignment model is trained, and the accuracy of face alignment is higher than that of traditional ASM method. In this paper, a virtual spectacle processing based on attitude estimation is proposed. Firstly, the attitude estimation of head is carried out. Because of the geometric projection based attitude estimation method, the L-M optimization algorithm is used to solve the nonlinear least square method in the process of attitude estimation, and the fitting property is better. Attitude estimation is more accurate. In the phase of virtual glasses processing, this paper proposes to use the rotation angle obtained by attitude estimation to transform the spectacle image into perspective properly, so that it can present a three-dimensional effect at the same time. Avoid exaggerated deformation. Combine the glasses leg with the glasses. When the head rotates, calculate the display length of the glasses leg according to the rotation angle. Finally, this paper applies virtual glasses to the system, and designs a simple virtual glasses trial wear system. The virtual spectacles in this paper can meet the needs of users and show satisfactory results.
【学位授予单位】：大连海事大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TP391.41;TP391.9

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