Forensic Digital Imaging

Best Practice/Workflow

Memory Cards

• Store (2x3 envelops)
• Label/barcode/number
• Format before new shoot
• Should have enough for a busy week

Scanners

• Reflective (fingerprint on CDs)
• Transparency/Film/Slide
• Details not seen with the naked eye

Video Capture

• Uncompressed 720 x 486 px

Processing

• Work on copies
• 16 bit
• Provide audit trail
  • History log
  • Adjustment layers
  • Duplicate layers
• Written procedures
  • handling, transporting, and storing evidence
• Repeatability of all adjustments
  • Cornerstone in forensic image processing

Printing

• Ink jet
• laser (cheaper)

Archive

• Hard drives
• CD's hard to manage

Presenting Pictures in the Courtroom

Familiarize yourself with courtroom beforehand

Mostly introduced as:

• 8 x 10 inch prints
• Large displays (overhead projectors)
• On-screen