红外人脸隐蔽性三维测量

提出了一种利用近红外结构光对人脸进行隐蔽性三维测量的方法。将波长为850nm的红外结构光条纹投影到人脸表面,利用相位测量轮廓术获取人脸的三维数据。用频谱分析的方法讨论了皮肤对结构照明光场的影响,通过实验给出了系统等效的传递函数,并计算分析了皮肤对红外正弦条纹对比度的影响.由于皮肤的透射和散射等特性,在设计人脸三维测量系统时,必须使用较低空间频率和较高对比度的结构光。实验结果表明,文中提出的方法是可行的,满足人脸隐蔽性三维测量的要求,在医学美容、人脸识别等领域具有广阔的应用前景。

Infrared face hidden three-dimensional measurement

In this paper,a method of three-dimensional measurement adopting near-infrared structure light to measure face covertly is put forward.Infrared structure stripes of 850nm wavelength will be projected onto the surface of human face,and three-dimensional face data by using phase-measuring profilometry is obtained.This paper uses the method of spectral analysis to discuss the effects of the skin on structure illumination light,gives the equivalent transfer function of system through the experiment and caculates and analysises effects of the skin on the infrared sinusoidal fringe contrast.As a result of skin transmission and scattering characteristics,the structured light with a lower spatial frequency and higher contrast must be used in the design of three-dimensional measurement system of human face.Experimental results show that the method proposed is feasible,meets the needs of face hidden three-dimensional measurement,and has broad application prospects in the medical beauty and face recognition.