Upcoming events

    • 25 Jun 2018
    • 1:00 PM - 4:00 PM (UTC+02:00)
    • Webinar

    This webinar was made possible thanks to the generous support of Foray Technologies.

    Please note that a certificate will not be provided for viewing past webinar.

    Adobe Photoshop has become a ubiquitous part of the forensic science community, and has cemented itself as an essential tool for processing (enhancement) of impression evidence.  The clarity of ridge detail can be improved significantly by suppressing background color noise as well as by adjusting contrast following proper techniques.  The improper use of certain processing methods can degrade image clarity and quality, and more importantly it can negatively impact the value of the impression for analysis and comparison.  After participating in this three-hour webinar, participants will have a better understanding of the functions and tools in Adobe® Photoshop® CC/CS that are used for forensic digital image processing. 

    The following is a brief outline of the topics that will be taught in this webinar. 


    1. Configuring Adobe Photoshop Preferences
    2. Calibrating images for 1:1 output/AFIS
    3. Background suppression

    a.      Using color modes to suppress background noise

    b.      Additional techniques to suppress background noise

                                         i.          Hue/Saturation

                                       ii.          Black & White

                                      iii.          Camera RAW as a filter

    c.      Suppressing color background noise with Calculations

      4. “Best Practices” for adjusting contrast

    a.      Selecting an “area of interest” for processing

    b.      Enhancement Techniques for creating contrast:

                                         i.          Levels

                                       ii.          Curves

                                      iii.          Shadows/Highlights

                                      iv.          Apply Image

    c.      Using filters to suppress noise

                                         i.          Noise > Dust and Scratches feature

                                       ii.          Sharpen > Sharpen and Unsharp Mask options

    d.      Adjusting image orientation (rotation) while mitigating artifacts

    NOTE:  Digital images used for webinar will be available upon request (via to allow participants to work with the images during the webinar as well as use the images for refresher training after the webinar.  Please send email request to


    About The Instructor: 

    David Witzke
    Vice President, Program Management, Foray Technologies

    With more than 20 years of AFIS and digital imaging experience, David Witzke (better known as Ski) is Vice President, Program Management for Foray Technologies, is considered one of the foremost experts in forensic digital image processing technologies.  His background includes software development, systems installation and integration, technical support, and training.  Because of his established reputation in forensic digital image processing, Ski has been asked to speak at hundreds of regional, national and international conferences.  Ski was also a guest instructor of the Digital Imaging of Evidentiary Photography training program at the FBI Academy in Quantico, Virginia for nearly eight years, and was the instructor for the Forensic Digital Image Processing program at the British Columbia Institute of Technology (BCIT) in Vancouver, BC for more than six years.  Ski is a contributing writer for three well-known books:  Crime Scene Photography (Third Edition, published 2016 by Academic Press), Introduction to Crime Scene Photography (published 2012 by Academic Press) and Footwear, The Missed Evidence (Third Edition, Published 2013 by Staggs Publishing).  (Crime Scene Photography has been chosen by the IAI certification committees for the Certified Crime Scene Investigator (CCSI) Certification Test, the Certified Crime Scene Analyst (CCSA) Certification Test, the Certified Senior Crime Scene Analyst (CSCSA) Certification Test, and the Forensic Photography Certification Test.)  Ski has also been the chairperson of the Digital Imaging Subcommittee of both the Chesapeake Bay and Florida Divisions of the IAI, and is an associate member of the European Network of Forensic Science Institutes Fingerprint Working Group (ENFSI-FWG), a member of the NIST Video Imaging and Technology Analysis (VITAL) Organization of Scientific Area Committees for Forensic Science, and an Adjunct Professor at George Washington University in Washington, DC.  



Past events

01 Jun 2018 ICYMI Past Webinar: 'Sufficiency' in Friction Ridge Examination
04 May 2018 ICYMI Past Webinar: A Critical Review of the ACE-V Process
25 Apr 2018 An introduction to Human Gait, its analysis and use as evidence
13 Oct 2017 Reducing Erroneous Exclusions Workshop
12 Oct 2017 2017 EU IAI Educational Conference
24 May 2017 Webinar Spécial en Français co-organisé par AQC et EU IAI
24 Apr 2017 Distinguishing Fabricated Latent Prints
06 Apr 2017 Best Practices for Forensic Digital Image Processing Using Adobe Photoshop
21 Mar 2017 On Being Wrong: What to do When an Expert Makes Mistakes
02 Feb 2017 Enhancement of Forensic Digital Images
21 Oct 2016 Workshop #2 Palm Print @ 2016 EU IAI Educational Conference
21 Oct 2016 Workshop #3 Competency Testing for Latent Print Examiners
20 Oct 2016 Workshop #1 Impossible Decisions @ 2016 EU IAI Educational Conference
20 Oct 2016 2016 EU IAI Educational Conference
30 Jun 2016 Forensic Face Comparison Training - Webinar sponsored by MorphoTrak
27 May 2016 'Sufficiency' in Friction Ridge Examination
09 Apr 2016 ICYMI Past Webinar: A Critical Review of the ACE-V Process
01 Apr 2016 ICYMI EU IAI Webinar #1: Alice Maceo - Complexity and Documentation in Latent Prints
31 Mar 2016 ICYMI Webinar#2 - Reducing Erroneous Exclusions
31 Mar 2016 ICYMI Webinar Recording for Forensic Data Science on Multimedia Big Data
17 Feb 2016 February Webinar: A Critical Review of the ACE-V Process
29 Jan 2016 Webinar #3 Forensic Data Science on Multimedia Big Data
14 Dec 2015 Webinar#2 - Reducing Erroneous Exclusions
06 Nov 2015 EU IAI Webinar #1: Alice Maceo - Complexity and Documentation in Latent Prints
09 Oct 2015 1st Conference of the European Division of the International Association of Identification October 2015, UK.

The European Division of the International Association for Identification

Laan van Ypenburg 6

2497 GB, Den Haag

The Netherlands


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