Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

3D scanner facilitates forensics at the crime scene

13.02.2020

The perpetrator left shoe prints and tire tracks can also be seen. The forensics usually casts such impressions with plaster - a lengthy procedure that also destroys the trace. Using a portable 3D scanner from Fraunhofer IOF, such traces
can now be secured non-destructively within seconds.

The new "3DF scanner" will be presented at the GPEC police equipment trade fair from 18 to 20th February of 2020 in Frankfurt/Main (Hall 11.1, Stand E120).

If the police commissioner in TV crime series finds a corpse, the forensic collects DNA traces, secures fingerprints, takes photos and casts shoe prints, tire tracks or other traces with plaster. The actual securing of evidence of the criminal investigation department works in a similar way.


Down to the smallest detail - analysis and results of 3D scans of shoe and tire impressions.

© Fraunhofer IOF


Simple and fast scanning with the light-weight 3D measuring system.

© Fraunhofer IOF

However, the information content of photos is limited - for example, it is not possible to derive any depth information from them. Even the plastering of shoe prints and the like has its limits: On one hand, the trace is destroyed after plastering.

On the other hand, the plaster needs time to harden, especially in a wet or cold environment it hardens only with difficulty. The portable device works contactless and is easy to handle

The portable "3DF scanner" makes it possible to secure the tracks easily, quickly and without destruction. It was developed by researchers from the Fraunhofer IOF together with industrial partners. "The scanner records the tracks in three dimensions" says Roland Ramm, a scientist at Fraunhofer IOF.

"At only 4.3 kilograms, it is very light, battery-powered and robust against weather and temperature. Besides, it works without contact, so the trace is still intact after scanning."

The device can reliably detect even the smallest features, its resolution is below 200 micrometers. Because more important than the shoe size or brand, for example, are small scratches in the shoe profile, which the criminal investigation department can use to assign a shoe print to a specific shoe.

In everyday life, the examination with the scanner looks like this: The forensics holds the device over the trace, for example, the shoe print, and starts the recording. At the same time, a camera attached to the scanner takes a photo. A few seconds later the user sees a preview image on the integrated display.

On this the user can see whether the image section fits, the image is sharp, and already receives the first results. The detailed evaluation follows in the laboratory because it is usually carried out by other colleagues, such as trassologists.

Here, for example, the length of an imprint or the depth of the shoe profile can be analyzed, and comparisons can be made with traces from other crime scenes or a perpetrator.

To measure the tracks three-dimensionally, the researchers have relied on the pattern projection. Each of the two cameras, which look at the track from slightly different angles, take an image, while a small projector beams a stripe pattern onto the track.

Geometric statements can be made based on the deformation of the beamed pattern. The measurement uncertainty is only 20 to 100 micrometers. The validity of the data is thus at least as high - if not higher - than that of data obtained from plastering.

Presentation at the GPEC trade fair in Frankfurt

In the meantime, the device is marketed by the Italian company Gexcel, which also offers the appropriate evaluation software. Interested police authorities can also borrow the portable 3D scanner from Fraunhofer IOF for test purposes. At the "General Police Equipment Exhibition & Conference GPEC" trade fair in Frankfurt am Main from February 18 to 20, 2020, Fraunhofer IOF researchers will present the "3DF Scanner" (Hall 11.1, Stand E120).

Visitors will be able to try out the device live on various tracks, and the evaluation software from Gexcel can also be tested using data from simulated crime scenes.

Wissenschaftliche Ansprechpartner:

Contact:
Roland Ramm
Roland.Ramm@iof.fraunhofer.de
Phone +49 3641 807-213


Weitere Informationen:

https://www.iof.fraunhofer.de/en/pressrelease/2020/3D-forensic-scanner.html

Annika Höft | Fraunhofer-Institut für Angewandte Optik und Feinmechanik IOF

Further reports about: 3D 3DF-scanner DNA traces GPEC IOF crime scene criminal investigation fingerprints micrometers

More articles from Information Technology:

nachricht Mixed-signal hardware security thwarts powerful electromagnetic attacks
19.02.2020 | Purdue University

nachricht Powering the future: Smallest all-digital circuit opens doors to 5 nm next-gen semiconductor
18.02.2020 | Tokyo Institute of Technology

All articles from Information Technology >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Freiburg researcher investigate the origins of surface texture

Most natural and artificial surfaces are rough: metals and even glasses that appear smooth to the naked eye can look like jagged mountain ranges under the microscope. There is currently no uniform theory about the origin of this roughness despite it being observed on all scales, from the atomic to the tectonic. Scientists suspect that the rough surface is formed by irreversible plastic deformation that occurs in many processes of mechanical machining of components such as milling.

Prof. Dr. Lars Pastewka from the Simulation group at the Department of Microsystems Engineering at the University of Freiburg and his team have simulated such...

Im Focus: Skyrmions like it hot: Spin structures are controllable even at high temperatures

Investigation of the temperature dependence of the skyrmion Hall effect reveals further insights into possible new data storage devices

The joint research project of Johannes Gutenberg University Mainz (JGU) and the Massachusetts Institute of Technology (MIT) that had previously demonstrated...

Im Focus: Making the internet more energy efficient through systemic optimization

Researchers at Chalmers University of Technology, Sweden, recently completed a 5-year research project looking at how to make fibre optic communications systems more energy efficient. Among their proposals are smart, error-correcting data chip circuits, which they refined to be 10 times less energy consumptive. The project has yielded several scientific articles, in publications including Nature Communications.

Streaming films and music, scrolling through social media, and using cloud-based storage services are everyday activities now.

Im Focus: New synthesis methods enhance 3D chemical space for drug discovery

After helping develop a new approach for organic synthesis -- carbon-hydrogen functionalization -- scientists at Emory University are now showing how this approach may apply to drug discovery. Nature Catalysis published their most recent work -- a streamlined process for making a three-dimensional scaffold of keen interest to the pharmaceutical industry.

"Our tools open up whole new chemical space for potential drug targets," says Huw Davies, Emory professor of organic chemistry and senior author of the paper.

Im Focus: Quantum fluctuations sustain the record superconductor

Superconductivity approaching room temperature may be possible in hydrogen-rich compounds at much lower pressures than previously expected

Reaching room-temperature superconductivity is one of the biggest dreams in physics. Its discovery would bring a technological revolution by providing...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

70th Lindau Nobel Laureate Meeting: Around 70 Laureates set to meet with young scientists from approx. 100 countries

12.02.2020 | Event News

11th Advanced Battery Power Conference, March 24-25, 2020 in Münster/Germany

16.01.2020 | Event News

Laser Colloquium Hydrogen LKH2: fast and reliable fuel cell manufacturing

15.01.2020 | Event News

 
Latest News

Time-resolved measurement in a memory device

19.02.2020 | Physics and Astronomy

Mixed-signal hardware security thwarts powerful electromagnetic attacks

19.02.2020 | Information Technology

Could water solve the renewable energy storage challenge?

19.02.2020 | Power and Electrical Engineering

VideoLinks
Science & Research
Overview of more VideoLinks >>>