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2020年02月08日

【期刊论文】full-field 3d shape measurement of discontinuous specular objects by direct phase measuring deflectometry

zonghua zhang, yue liu

scientific reports,2017,7(10293):10293

2017年07月10日

with the advent of intelligent manufacturing, phase measuring deflectometry (pmd) has been widely studied for the measurement of the three-dimensional (3d) shape of specular objects. however, existing pmds cannot measure objects having discontinuous specular surfaces. this paper presents a new direct pmd (dpmd) method that measures the full-field 3d shape of complicated specular objects. a mathematical model is derived to directly relate an absolute phase map to depth data, instead of the gradient. two relevant parameters are calibrated using a machine vision-based method. on the basis of the derived model, a full-field 3d measuring system was developed. the accuracy of the system was evaluated using a mirror with known positions along an accurate translating stage. the 3d shape of a monolithic multi-mirror array having multiple specular surfaces was measured. experimental results show that the proposed dpmd method can obtain the full-field 3d shape of specular objects having isolated and/or discontinuous surfaces accurately and effectively.

phase measuring deflectometry, specular surface, 3d shape measurement

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2017年05月23日

【期刊论文】an iterative distortion compensation algorithm for camera calibration based on phase target

张宗华

sensors, 2017, 17(6): 1188,-0001,():

-1年11月30日

yongjia xu, feng gao, hongyu ren, zonghua zhang, and xiangqian jiang.

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2014年05月10日

【期刊论文】simultaneously measuring 3d shape and colour texture of moving objects using ir and colour fringe projection techniques

张宗华, yongjia xu, chao chen, shujun huang, zonghua zhang*

optics and lasers in engineering, 2014, 61(1): 1-7,-0001,():

-1年11月30日

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2012年05月23日

【期刊论文】comparison of fourier transform, windowed fourier transform, and wavelet transform methods for phase calculation at discontinuities in fringe projection profilometry

张宗华, zonghua zhang, zhao jing, zhaohui wang, and dengfeng kuang.

optics and lasers in engineering, 2012, 50(8): 1152-1160.,-0001,():

-1年11月30日

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2012年05月23日

【期刊论文】review of single-shot 3d shape measurement by phase calculation-based fringe projection techniques

张宗华, zonghua zhang.

optics and lasers in engineering. 2012, 50(8): 1097-1106.,-0001,():

-1年11月30日

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    河北工业大学,河北

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