The use of Photoshop, for forensics, is to enhance the visibility and to emphasize and/or isolate existing information within the image. The use of Photoshop by untrained individuals can render an image inadmissible in court. The Basic Forensic Image Processing course will be of interest to forensic photographers and others engaged in the enhancement of forensic images who have limited experience using Photoshop or are unfamiliar with the use of Photoshop.
Emphasis in the Basic Forensic Image Processing course is placed on the enhancement of images intended for comparative sciences, such as fingerprints and footwear, tire tracks, or tool-mark impressions. Students will be introduced to digital darkroom techniques that can be employed to images to enhance their visibility without adding artifacts or new information.
Course Learning Objectives
File Types What is Compression?
Lossy vs Lossless
- Should I shoot in RAW? - Pros and cons of each file type
Bridge More than a File Explorer
Viewing and Organization
- Importing from the camera - Labels - Filters - Detail Comparison
Catalogs and Renaming
- Batch rename - Catalogs
- Contact Sheet - Automated tasks
Adobe Camera Raw Primary adjustments
- Apply minor adjustments to several images at once, ex. White Balance correction.
Opening Photoshop Familiarize with the user interface
Setting up the Workspace
- Navigation, Tools, panels, palettes, preferences, etc.
- Scratch disks and history log
- How to show/hide and dock
- What they do - Where they are
- Resizing for digital or print format viewing
Cropping and Canvas Size
- Straightening - Perspective correction
Layers and Adjustments What are Layers? What is destructive editing?
- Non-destructive editing - Isolating edits to affect chosen areas of an image
Channels and Color Modes How does color affect an image?
- RGB - CMYK - LAB - Grayscale
- Channel Mixer - Black and White - Isolating color-based information
Overlay Techniques and Blending
- Composite multiple exposure images
Turn multi-step edits into a button
- How to create a set of actions - Pros and cons
Case notes and presentations
Arrows and Lines
Participants are required to bring a laptop computer with a working copy of Adobe Photoshop CC or Adobe Photoshop CS6 and Adobe Bridge. The trial version is acceptable. Please do not download and install the trial version more than two weeks before the course to ensure that the software functions properly throughout the class.