Take a Cue From NASA TheReal Value of 3D 360° Imagingin … · 2017. 8. 23. · Imagingin Crime...
Transcript of Take a Cue From NASA TheReal Value of 3D 360° Imagingin … · 2017. 8. 23. · Imagingin Crime...
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Take a Cue From NASA
The Real Value of 3D & 360° Imaging in Crime Scene Investigation and the Investigative Process
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MehzebChowdhury PhD Researcher in Forensic Science & Criminal Investigations
MSc Criminology & Criminal Justice PGDL in Criminal Practice
LLB (Hons) Durham University, UK
Northumbria University, UKUniversity of London, UK
Barrister-at-Law, Lincoln’s Inn
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MABMAT Crime Scene Rover
https://www.youtube.com/watch?v=8zlWUOn9RUg
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Supporters of Forensic Science
Since… well, forever.
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Full-Circle Panorama Beside 'Namib Dune' on Mars
Courtesy: National Aeronautics and Space Administration
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Crime Scene Imaging
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Visiting a ‘Virtual Crime Scene’
https://www.youtube.com/watch?v=9u5YnyApsCE
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What is 360° Imaging, anyway?
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The Basics • Typically recorded using either a special rig of multiplecameras, or using a dedicated camera that contains multiplecamera lenses • Using a method called “stitching” individual images aremerged together into one spherical photo/video, and thecolour and contrast of each shot is calibrated to be consistent with the rest • Stitching can be done automatically in-camera or automatedsoftware on a computer. In some cases, manual interventionmay be necessary
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The Basics (continued)
• The images/video can be played back on smartphones,computers and using virtual reality headsets • The quality of the image(s) would depend on the sameaspects as image quality determinations made for traditionalphotography or videography
• Commercial and consumer solutions are available on the market on a variety of cost plans, ranging from $199 to$100,000
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What does raw output look like? Usually…
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Factors to Consider There are a few
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User Experience
• One photo captures an entire scene from a 360° vantagepoint • Video can be used to document crime scenes from everyangle
• Operation is relatively simple for majority of available systems • Stitching and exporting can be done automatically out-of-the-box • User interaction/distortion can be minimised due to smartsoftware
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Image Considerations • Aperture
• Field of View
• Sensor • ISO
• Shutter Speed
• Resolution • Compression
• Output Format
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Practical Considerations • Size
• Weight • Battery • Assembly
• Mounts • Weatherproof • Shockproof • Warranty
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Costs Consumer options range from $199 to $6000
Specialised Commercial Solutions are between $3000 and $100,000
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Error Management
• Subjective Bias • Contextualisation Errors • Proficiency Testing • Identification of Good Practice
• Planning
• Transparency • Cold Case review
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Does this discussion matter? Well…
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Questions & Discussion