Optical Three-dimensional Reconstruction Technique For Digital Human Body-surface

The combination of biomedicine IT and computer science make digital human-body to be hot and advanced topics of biomedical engineering for research and application. The three-dimensional digital of Human body-surface, becoming widely used in biomedicine, is an important direction of the study of digital human-boby. Three-dimensional reconstruction technique is the foundation of digital human body-surface. Tomography based on slice-cutting and used in researching digital virtual human is not able to apply to three-dimensional reconstruction for live body surface. CT that based on X-ray is also not an effective way to realize the three-dimensional reconstruction of soft-tissue surface.The technical problems of optical three-dimensional profilometry used for three-dimensional reconstruction of live human body were studied in this paper. Theoretically, Fourier transform profilometry that based on two-dimensional structure-light can reconstruct dynamic objects including live human body. After the study of traditional Fourier transform profilometry and its applications in three-dimensional reconstruction for human body-surface, windowed Fourier transform profilometry and multiscale windowed Fourier transform profilometry as well as their applications in three-dimensional reconstruction for human body-surface were proposed in order to solve the localization of the traditional Fourier transform profilometry. Wavelet transform enjoys an advantage in space-frequency localization and multiresolution. Under the slow variation condition of phase gradient, the phase of deformed grating pattern can be demodulated by solving the phase of the ridge of wavelet transform. Further more, the three-dimensional profilometry using direct abstracting the phase of the ridge of wavelet transform and its application in three-dimensional reconstruction for human body-surface were proposed. The ridge of wavelet transform also used for the detection of instantaneous frequency which can define the scale of multiscale windowed Fourier transform profilometry. Comparing with traditional phase-stepping profilometry that only can apply to the...