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FAQ - Technology and suggestions

Free evaluation...what's the catch?
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What files do I send to and what's the best way?
How do you enhance audio and video files?
How do you detect tampering and alterations?
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Technology and suggestions
Glossary of terms

EDUCATIONAL ARTICLES (listed by their required skill level)
BASIC - Digital Forensics and the law HERE
BASIC - Mastering the Daubert challenge HERE
BASIC - Preparation as an expert witness HERE
BASIC - Don't let distorted media ruin your case HERE
BASIC - Exposing tampered recordings HERE
BASIC - Understanding corrective focus HERE
BASIC - Understanding deblur science HERE
BASIC - Audio Video Forensic Analyst career HERE
INTERMEDIATE - Forensic analyst - enhancing your career HERE
INTERMEDIATE - Open source software for the video analyst HERE
INTERMEDIATE - Detailed article on tamper detection and authentication HERE  (mini version HERE)
ADVANCED - Step-by-step guide to performing Video Error Level Analysis HERE  (mini version HERE)
ADVANCED - Step-by-step guide to see faint movements and temperature changes HERE

The true native resolution of most surveillance systems is such that critical facial details or license plate character may only occupy a single pixel. Unfortunately, no amount of clarification or enhancement can reconstruct the desired details from a single dot. To avoid this in the future, we recommend that you add (not replace) your security using an extreme zoom camera aimed at an entrance or passageway point so it can clearly capture each person's face or license plate. Set your DVR to only record this camera upon motion using the highest speed and quality settings. With this configuration, you will only get a few images but they will be clear and useful. With this configuration, your current camera will tell you "what" happened and the added telephoto camera will tell you "who" was involved.

There are two methods to enhance or clarify an image or video, pre-packaged or custom software.  Pre-package solutions will dramatically simplify your task, but will be hard-coded to specific parameters that may not be optimized for all image-video types.  By limiting the tools and options, pre-packaged software reduces the learning curve.  If you want optimal results, and don't mind getting under the hood, open-source platforms like AviSynth provide nearly unlimited image and video enhancement, clarification and authentication control. Depending upon the needs of your case, we will use some combination of audio-video-image software, along with conversion and authentication tools.

Additional image-video programs include:
dTective - Ocean Systems
FIVE - Amped
- MotionDSP
PhotoShop - Adobe
Tech Agent - StarWitness
VideoFOCUS - Salient Stills
Video Analyst - Intergraph
Video Investigator - Cognitech
VideoCleaner - open source*
VirtualDub - open source*

Audio tools include:
Audacity - open Source*
Audition - Adobe
Forensics - DiamondCut
Repair - Zynaptiq
RX Advanced - iZotope

*The open source software noted above is cost-free, ad-free, peer-reviewed and in continued development.

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