Wavelet optical flow estimation and image correlation deformation identification method applied to small and medium-sized reservoir dam monitoring

• Main Authors: WANG YAO, ZHU RONG, RAN QIHUA, ZHENG WANBO, WU YANQING, DONG JINXIAO, LI LEI, YE RUIXIAN
• Format: Patent
• Language: Chinese; English
• Published: 16.09.2022
• Subjects: CALCULATING; COMPUTING; COUNTING; MEASURING; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS; MEASURING LENGTH, THICKNESS OR SIMILAR LINEARDIMENSIONS; PHYSICS; TESTING

The invention provides a wavelet optical flow estimation and image correlation deformation identification method applied to small and medium-sized reservoir dam monitoring, and belongs to the field of multi-source motion image identification. The method comprises the following steps: firstly, carrying out image noise processing by adopting a Daubechies wavelet filter; secondly, constructing an optical flow field reflecting the change condition of a deformation area in the image by applying an optical flow estimation method; a digital speckle image correlation method is adopted again, and a displacement field which can also reflect the deformation condition of the monitoring area is constructed; and finally, carrying out weighted calculation on the optical flow field and the displacement field to obtain a more accurate displacement field for reflecting deformation and displacement conditions of the reservoir dam. The method is mainly applied to the identification of the horizontal and vertical deformation of t