10.6084/m9.figshare.5783298.v1 Zhenning Chen Zhenning Chen pattern.tif Optica Publishing Group 2018 Image processing Nondestructive testing Instrumentation, measurement, and metrology 2018-01-30 16:24:13 Media https://opticapublishing.figshare.com/articles/media/pattern_tif/5783298 Digital speckle pattern