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Motion microscopy for visualizing and quantifying small motions.

Authors :
Wadhwa, Neal
Chen, Justin G.
Sellon, Jonathan B.
Donglai Wei
Rubinstein, Michael
Ghaffari, Roozbeh
Freeman, Dennis M.
Büyüköztürk, Oral
Pai Wang
Sijie Sun
Sung Hoon Kang
Bertoldi, Katia
Durand, Fré
Freeman, William T.
Source :
Proceedings of the National Academy of Sciences of the United States of America; 10/31/2017, Vol. 114 Issue 44, p11639-11644, 6p
Publication Year :
2017

Abstract

Although the human visual system is remarkable at perceiving and interpreting motions, it has limited sensitivity and we cannot see motions that are smaller than some threshold. Although difficult to visualize, tiny motions below this threshold are important and can reveal physical mechanisms, or be precursors to large motions in the case of mechanical failure. Here, we present a "motion microscope," a computational tool that quantifies tiny motions in videos and then visualizes them by producing a new video in which the motions are made large enough to see. Three scientific visualizations are shown, spanning macroscopic to nanoscopic length scales. They are the resonant vibrations of a bridge demonstrating simultaneous spatial and temporal modal analysis, micrometer vibrations of a metamaterial demonstrating wave propagation through an elastic matrix with embedded resonating units, and nanometer motions of an extracellular tissue found in the inner ear demonstrating a mechanism of frequency separation in hearing. In these instances, the motion microscope uncovers hidden dynamics over a variety of length scales, leading to the discovery of previously unknown phenomena. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00278424
Volume :
114
Issue :
44
Database :
Complementary Index
Journal :
Proceedings of the National Academy of Sciences of the United States of America
Publication Type :
Academic Journal
Accession number :
126004408
Full Text :
https://doi.org/10.1073/pnas.1703715114