TY - JOUR
T1 - Quantitative evaluation of Bayer chromatic imaging on the accuracy of photogrammetric measurements
AU - Zhu, Haibin
AU - Zhang, Xiaojuan
AU - Li, Jia
AU - Chen, Lingfeng
AU - Liu, Xuejin
AU - Ma, Qinwei
AU - Ma, Shaopeng
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/10
Y1 - 2019/10
N2 - Bayer chromatic cameras are increasingly being used in photogrammetry for high-accuracy deformation measurements. However, studies on the quantitative accuracy evaluation of different photogrammetric methods using Bayer chromatic images are lacking, as the influence mechanism of chromatic images on measurement accuracy is unclear. This work performed substantial tests to investigate the influence of chromatic images on the photogrammetric measurement accuracy. Firstly, the spatial resolution and signal-to-noise ratio (SNR) of chromatic images were quantitatively evaluated. The performance of Bayer chromatic images was found to be systematically worse than the monochromatic counterparts with the same imaging configurations. Different photogrammetric measurements were then carried out using monochromatic and chromatic images. The measurement accuracy from chromatic images was significantly lower than that from monochromatic images, except for the grid method with square-profile fringes. Therefore, it is recommended to use monochromatic cameras for carrying out deformation measurements, unless there is a requirement of colour identification.
AB - Bayer chromatic cameras are increasingly being used in photogrammetry for high-accuracy deformation measurements. However, studies on the quantitative accuracy evaluation of different photogrammetric methods using Bayer chromatic images are lacking, as the influence mechanism of chromatic images on measurement accuracy is unclear. This work performed substantial tests to investigate the influence of chromatic images on the photogrammetric measurement accuracy. Firstly, the spatial resolution and signal-to-noise ratio (SNR) of chromatic images were quantitatively evaluated. The performance of Bayer chromatic images was found to be systematically worse than the monochromatic counterparts with the same imaging configurations. Different photogrammetric measurements were then carried out using monochromatic and chromatic images. The measurement accuracy from chromatic images was significantly lower than that from monochromatic images, except for the grid method with square-profile fringes. Therefore, it is recommended to use monochromatic cameras for carrying out deformation measurements, unless there is a requirement of colour identification.
KW - Bayer chromatic images
KW - Measurement accuracy evaluation
KW - Photogrammetry
KW - Signal-to-noise ratio
KW - Spatial resolution
UR - http://www.scopus.com/inward/record.url?scp=85067254699&partnerID=8YFLogxK
U2 - 10.1016/j.measurement.2019.05.095
DO - 10.1016/j.measurement.2019.05.095
M3 - Article
AN - SCOPUS:85067254699
SN - 0263-2241
VL - 145
SP - 724
EP - 734
JO - Measurement: Journal of the International Measurement Confederation
JF - Measurement: Journal of the International Measurement Confederation
ER -