Sujets 6.1 : Smiths group
Introduction
Presentation psr Clement Fang
Serge Maitrejean
- Responsable de l'innovation
- Doctorat en physique
Eric Garrido
- Doctorat en physique nucleaire
Groupe Smiths
- Cote en bourse a Londres
- 4 divisions
- Smith detection: scanner et detection
- Detection de choses illicites ou non-declarees
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En france:
- Base a Vitry-sur-Seine
- A peu pres 200 personnes
- IA / traitement d'imageโฆ
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Les techs au sein de Smith
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Global presence
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Vehicle, cargo & mobile screening
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High energy X-ray imaging
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Which target / threat we are looking for ?
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SD Paris Partnerships
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Epita est cense etre la
Cigarettes detection
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Some big seizures made thanks to our iCmore in the news
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iCmore Weapons detection
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More in-depth
Truck Radioscopy
- Imaging with X-Rays but with a scanning principle
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- Pulsed X-ray source: X-Ray pulses (flash) oh three every 2 or 3 milliseconds
- One vertical line of detectors/pixels (5 or 20 mm width, 5 mm height): one column of image is recorded for each X-ray pulses
- Truck speed is limited: < displacement of detector width between 2 pulses (typically 5-7 km/h)
- Or resolution is bad (large detectors)
A new tech: Matrix detector
- Multicolumn detector (column)
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- Large resolution improvement (Left one line, Right Matrix detector)
But noting or nobody is perfect
- First problem: missing part
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- Easy to solve by slowing down the speed butโฆ
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- Superposition: le meme point se voit 2 fois
The problem of depth at low speed: rearranging data ?
- The way of ordering data is depending on the depth where objects are located.. But we don't know the depth ! It's a stereo effect
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Ordering data is depending on the depth
- We have to assume where in depth the object are located, if we are wrong strong artifacts appears
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Turning a drawback onto an advantage
- Minimizing the artifacts Finding the depth of the objects and providing a optimum high resolution image
Curent status
- Proof of concept has been done using energy minimization technics
- Work on this approach is pursuing
- A comprehensive set of data has been acquired from which the "exact images" can be extracted
- We want to test another approach, neural networks and deep learning are good candidates
The work
- Getting familiarized with the problem (not so easy)
- Getting familiarized with the current method
- Initating Matrix Detector Deep Learning process for:
- Building the best radioscopic planar images
- Finding the depth where objects are located