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高建新, 周辛庚, 章玮宝, 龚欣芸
实验力学,1996,11(3):334~338,-0001,():
-1年11月30日
本文应用数字图像测量系统.对砼试件在成形早期最初26小时的变形场进行了非接触的定量测量,得到了砼成形早期收缩应变随时间变化的曲线。整个测量过程简便直接,表明数字图像测量方法完全可用来对砼结构的位移场进行非接触的精密测量,在配备了相应的光学观察仪器后,也可用来测量一般的应变场,从而特为土建结构的定量测试提供新的有力手段。
数字图像,, 相关测量,, 砼成表,, 砼变形
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【期刊论文】3D shape reconstruction of teeth by shadow speckle correlation method
高建新, Jianxin Gaoa, Wei Xua, Jianping Gengb
Optics and Lasers in Engineering 44(2006)455-465,-0001,():
-1年11月30日
This paper presents a new method for 3D shape reconstruction in computer-aided dental prosthetics. A specklegram is projected onto the tooth to be measured. This shadow speckle image is recorded and then processed by a digital image correlation method, which enables the computation of 2D shapes based on the similar principle of shadow moire method. By repeating the procedure for all the sides, i.e., one crown and several side surfaces, local 2D shapes can be measured precisely. Afterwards, these local 2D profiles are merged to form a 3D model, during which certain constraints such as the widths along perpendicular directions are introduced to guide the process. As the height information within an entire image field is recorded instantly, it has the potential to be employed in an intra-oral environment, which would make the patient feel more comfortable during the restoration process. In vitro experiments were carried out on gypsum teeth models and the results proved the effectiveness of the proposed method.
Shadow speckle, Digital image correlation, Dental prosthetics, 3D shape reconstruction, Shape measurement
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高建新, 周辛庚
力学学报,1995,27(6):724~731,-0001,():
-1年11月30日
应用图像识别与变分学原理,对数字散斑相关方法作了理论阐述,导出了测量物体表面变形场的一般过程,将力学中的变形测量问题转化为单纯的数值计算问题,避免了传统光测方法与干涉条纹有关的一系列困难。初步的实验结果表明,该方法在工程实际现场、高速冲击动态过程、细观力学变形过程以及变形测量的自动化等方面都有广泛的应用潜力,从而为光测力学拓展应用领域、实现自动化测量展现了新的前景。
数字散斑,, 相关,, 变形测量,, 图像处理,, 细观力学
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