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Measuring full-field displacement spectral components using photographs taken with a DSLR camera via an analogue Fourier integralJavh, Jaka ; Slavič, Janko, 1978- ; Boltežar, MihaInstantaneous full-field displacement fields can be measured using cameras. In fact, using high-speed cameras full-field spectral information up to a couple of kHz can be measured. The trouble is ... that high-speed cameras capable of measuring high-resolution fields-of-view at high frame rates prove to be very expensive (from tens to hundreds of thousands of euro per camera). This paper introduces a measurement set-up capable of measuring high-frequency vibrations using slow cameras such as DSLR, mirrorless and others. The high-frequency displacements are measured by harmonically blinking the lights at specified frequencies. This harmonic blinking of the lights modulates the intensity changes of the filmed scene and the camera-image acquisition makes the integration over time, thereby producing full-field Fourier coefficients of the filmed structure's displacements.Source: Mechanical systems and signal processing. - ISSN 0888-3270 (Vol. 100, Feb. 2018, str. 17-27)Type of material - article, component partPublish date - 2017Language - englishCOBISS.SI-ID - 15589915
Author
Javh, Jaka |
Slavič, Janko, 1978- |
Boltežar, Miha
Topics
DSLR camera |
optical flow |
modal analysis |
photogrammetry |
variable brightness |
Lucas-Kanade |
DSLR fotoaparati |
optični tok |
modalna analiza |
fotogrametrija |
spremenljiva svetlost |
Lucas-Kanade
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source: Mechanical systems and signal processing. - ISSN 0888-3270 (Vol. 100, Feb. 2018, str. 17-27)
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Database name | Field | Year |
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Links to authors' personal bibliographies | Links to information on researchers in the SICRIS system |
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Javh, Jaka | 37442 |
Slavič, Janko, 1978- | 23010 |
Boltežar, Miha | 02034 |
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