&lt;title&gt;How to detect Edgar Allan Poe's 'purloined letter,' or cross-correlation algorithms in digitized video images for object identification, movement evaluation, and deformation analysis&lt;/title&gt;

Dost, M.; Vogel, Dietmar; Winkler, Thomas; Vogel, J.; Erb, R.; Kieselstein, E.; Michel, B.

doi:10.1117/12.484373

Cited by 13 publications

(13 citation statements)

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“…Digital Image Correlation (DIC) applied to digitized grey scale patterns is an optical field measuring method based on digital image acquisition and image processing. Digitized images acquired from the object under investigation at a reference state and, at least, one different state are compared using a special algorithm (Dost et al, 2003). An additional subpixel algorithm enhances the lateral resolution to approximately 1/10 to 1/100 of an image point (Pixel).…”

Section: Flow Velocities Monitoringmentioning

confidence: 99%

Hazard assessment investigations due to recent changes in Triftgletscher, Bernese Alps, Switzerland

Canassy¹,

Bauder²,

Dost

et al. 2011

Nat. Hazards Earth Syst. Sci.

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Abstract. The details and the consequences of the recent retreat of Triftgletscher (Gadmertal, Bernese Alps, Switzerland) have been investigated. Geodetic volume changes indicate a strong decrease since 1929 while the position of the terminus remained practically unchanged until 1990. The role played by calving in the tongue retreat running from 2000 to 2006 is confirmed by means of a mass balance model including a calving criterion. Results show that without calving, it would have taken two years longer for the lake to form than has been observed. The consequences of the ensuing tongue destabilization are surveyed, first with an ice avalanche model and second with a hydraulic study of the potential impulse wave triggered by the impact of the falling ice mass in the lake. Results point out that ice avalanches with volumes greater that 1 ·10 6 m 3 will flow into the lake and that in the worst scenario, a discharge of 400 m 3 s −1 is expected to reach the endangered area in Gadmertal 11 min after the break-off. In order to detect surface motion precursors to such ice avalanches, a photographic monitoring system was installed. The results indicate seasonal variations with peak velocity in summer and no significant change during the other months. Spectacular velocity increases were not observed so far.

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Section: Flow Velocities Monitoringmentioning

confidence: 99%

Hazard assessment investigations due to recent changes in Triftgletscher, Bernese Alps, Switzerland

Canassy¹,

Bauder²,

Dost

et al. 2011

Nat. Hazards Earth Syst. Sci.

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“…12 points out the corresponding temperature-time-shift function. 10 Modulus Mastercurve 8 Fig. 9: RCC tensile specimen and 1-Euro-Cent coin.…”

Section: Constitutive Parametersmentioning

confidence: 99%

“…16. The accuracy of the displacement evaluation can be improved in a second calculation step using a special subpixel algorithm [10]. …”

Section: Microdac(o): Deformation Analysis By Means Of Digital Image mentioning

confidence: 99%

Electronic Assemblies with Hidden Dies - Design Support by Means of FE Analysis

Sommer

Michel

Ostmann

2006

2006 1st Electronic Systemintegration Technology Conference

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In order to achieve highfunctionality and reliability and to minimise the number oflater redesign loops, thermal and thermo-mechanical reliability aspects should be taken into account alreadyfrom the beginning ofthe initial design phase ofnew products orfo rdeveloping ofa new technology. For this purpose, numerical studies by means offinite element (FE) analyses are very efficient to check the desiredproperties.Within the research project "Hiding Dies ", funded by the European Commission, several packages with hidden dies are under construction. A special test board with different thermal test chips (TTCs) was designed regardingpredicted thermal as well as thermo-mechanicalproperties. The authors outline their experience in supporting the design process ofpackages with buried dies. It proved to be important to combine technological knowledge, experience in FEA, and a sufficiently quick response time. IntroductionInnovative electronic portable products can be characterised by increasing signal frequencies and the demand on higher density of functions, which requires more space, for active components as well as for passives. One way to meet these requirements is a three-dimensional integration of components. The authors follow a so-called "chip in polymer" approach, introduced by Fraunhofer IZM and TU Berlin [1]. It allows an extremely dense integration and very short interconnects, necessary for applications in the GHz-range. Thinned Si-components are embedded directly into the printed circuit boards, and the interconnects are realised by laser drilling and galvanic metallisation.The basic interconnect structure, which is neither a flip chip nor a wirebond, is shown in Fig. 1.

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“…French scholars Raffard et al (2001) studied the mechanical behaviour of some of these buildings by applying the DIC method to measure the deformation of mortar for providing a further insight into the mechanics of mortar. Dost et al (1999;2003) acquired images of nanoscale objects using an atomic force microscope that helps them to not only observe the nanomaterials, but also analyse nano-displacement by using the DIC technique for detecting nano-cracks.…”

Section: Introductionmentioning

confidence: 99%

Development of digital image correlation method to analyse crack variations of masonry wall

Tung

Shih

Sung

2008

Sadhana

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The detection of crack development in a masonry wall forms an important study for investigating the earthquake resistance capability of the masonry structures. Traditionally, inspecting the structure and documenting the findings were done manually. The procedures are time-consuming, and the results are sometimes inaccurate. Therefore, the digital image correlation (DIC) technique is developed to identify the strain and crack variations. This technique is non-destructive for inspecting the whole displacement and strain field. Tests on two masonry wall samples were performed to verify the performance of the digital image correlation method. The phenomena of micro cracks, strain concentration situation and nonuniform deformation distribution which could not have been observed preciously by manual inspection are successfully identified using DIC. The crack formation tendencies on masonry wall can be observed at an earlier stage by this proposed method. These results show a great application potential of the DIC technique for various situations such as inspecting shrinkage-induced cracks in fresh concrete, masonry and reinforced concrete structures, and safety of bridges.

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<title>How to detect Edgar Allan Poe's 'purloined letter,' or cross-correlation algorithms in digitized video images for object identification, movement evaluation, and deformation analysis</title>

Cited by 13 publications

References 0 publications

Hazard assessment investigations due to recent changes in Triftgletscher, Bernese Alps, Switzerland

Hazard assessment investigations due to recent changes in Triftgletscher, Bernese Alps, Switzerland

Electronic Assemblies with Hidden Dies - Design Support by Means of FE Analysis

Development of digital image correlation method to analyse crack variations of masonry wall

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