Critical imaging parameters in time resolved digital image correlation (TRDIC): effect of optical blur during drop test on composite structures - MédiHAL Access content directly
Videos Year : 2021

Critical imaging parameters in time resolved digital image correlation (TRDIC): effect of optical blur during drop test on composite structures

Display 

Ahmed Boukar
Patrick Ienny
Pierre Slangen

Abstract

High speed imaging is applied for drop test on composite samples. The effect of optical blur on image correlation accuracy is described. Blur magnitude is tuned by decreasing the exposure time (at constant sensor sensitivity) for the same drop test series on flyspecked composite plates, while focus, aperture and 1:1 magnification are kept constant. Frame rate (80-20kfps) and lighting are changed while keeping the same image contrast. Results show correlation quality is already altered with subpixel blur. This study enables to define blur criterion in high-speed imaging and completes study about sampling rate effect in time resolved image correlation by high-speed imaging.

Dates and versions

hal-03272598 , version 1 (28-06-2021)

Licence

Attribution - NonCommercial

Identifiers

Cite

Ahmed Boukar, Patrick Ienny, Stéphane Corn, Pierre Slangen. Critical imaging parameters in time resolved digital image correlation (TRDIC): effect of optical blur during drop test on composite structures. 2021. ⟨hal-03272598⟩
122 View
45 Download

Altmetric

Share

Gmail Facebook X LinkedIn More