Vibration analysis using digital image processing for in vitro imaging systems

Zhonghua Wang; Shaohong Wang; Carlos Gonzalez

doi:10.1117/12.892430

24 September 2011 Vibration analysis using digital image processing for in vitro imaging systems

Zhonghua Wang, Shaohong Wang, Carlos Gonzalez

Proceedings Volume 8125, Optomechanics 2011: Innovations and Solutions; 81250D (2011) https://doi.org/10.1117/12.892430
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

A non-invasive self-measurement method for analyzing vibrations within a biological imaging system is presented. This method utilizes the system's imaging sensor, digital image processing and a custom dot matrix calibration target for in-situ vibration measurements. By taking a series of images of the target within a fixed field of view and time interval, averaging the dot profiles in each image, the in-plane coherent spacing of each dot can be identified in both the horizontal and vertical directions. The incoherent movement in the pattern spacing caused by vibration is then resolved from each image. Accounting for the CMOS imager rolling shutter, vibrations are then measured with different sampling times for intra-frame and inter-frame, the former provides the frame time and the later the image sampling time. The power spectrum density (PSD) analysis is then performed using both measurements to provide the incoherent system displacements and identify potential vibration sources. The PSD plots provide descriptive statistics of the displacement distribution due to random vibration contents. This approach has been successful in identifying vibration sources and measuring vibration geometric moments in imaging systems.

Citation Download Citation

Zhonghua Wang, Shaohong Wang, and Carlos Gonzalez "Vibration analysis using digital image processing for in vitro imaging systems", Proc. SPIE 8125, Optomechanics 2011: Innovations and Solutions, 81250D (24 September 2011); https://doi.org/10.1117/12.892430

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