UPDATES ON CLPEX.com
No major updates on the site this week.
we looked at an efficient workflow techniques
for detailed color space examination by Andrew Schriever and Casey Caudle.
Steve Everist brings us a
review of George Reis's new Photoshop book.
Photoshop CS3 for Forensic
Professionals: A Complete Digital Imaging Course for Investigators
by Steve Everist
King County Sheriff's Office
Photoshop CS3 for Forensics Professionals: A Complete Digital
Imaging Course for Investigators
by George Reis
Wiley Publishing, Inc, Indianapolis, IN / Sybex
Photoshop CS3 for Forensics Professionals is a book that finally fills a
need for all users of digital imaging for law enforcement purposes. The
topics covered are useful for both forensic and crime scene documentation
purposes. The author, George Reis, has been providing training in
photography and digital imaging to law enforcement for over a decade.
Through this book, much of the knowledge and skills taught in these classes
is now available in this book.
The book has been separated into three parts with a total of 24 chapters as
Part I: The Essentials
1: Best Practices
2: Reports and Testimony
3: Basic Image Settings
4: Navigating with Bridge
5: Camera Raw
6: Viewing Metadata
Part II: The Digital
7: Basic Image Adjustments
8: Printing Images
9: Automating Photoshop through Actions
10: Contact Sheets
11: PDF Presentations
12: Preparing Court Exhibits
Part III: Image Analysis
14: Compositing Images
15: Precise Image Sizing
16: Measuring Objects
17: Lens Distortion Correction
18: Noise Reduction
19: Deblurring and Sharpening
20: Contrast Enhancement
21: Color Isolation
22: Pattern Removal
23: Forensic Video Analysis
24: Additional Features
Along with the book, a companion CD has been included
with the sample images used in the book which have been separated into
folders referred to by chapter. The disc also contains demo software and
scripts that the reader can use. These additional scripts have been
referenced within the chapters where the techniques would apply.
Although the book references Photoshop Version CS3 in the title, this is
somewhat of a misnomer. Most of the content in the book can be used with
much earlier versions of Photoshop. In those instances where a certain
technique started in a specific version, or has changed in version CS3, or
is exclusive to CS2 it has been noted. The title shouldn’t scare away those
users of earlier versions who may think that the book is not for them.
The design of the book is to start with Part I: The Essentials. From there,
the different chapters do not need to be read in any specific order and are
easy to reference for the particular task at hand. The Essentials includes
information regarding case law, report writing, court testimony, setting up
the Photoshop workspace, using Adobe Bridge, Raw files, and the use of
metadata. Starting with Part I, the focus throughout the book is on best
practices, forensically valid techniques and always working on copies of the
original image. However, there is no mention of the various Scientific
Working Groups (SWG’s) and the guidelines relative to digital imaging that
they have put forth. As many agencies are either referencing these
guidelines or adapting them into their own SOP’s, they may deserve some
In Part II: The Digital Darkroom, George has included many of the common
tasks that are performed with digital images along with ways of
accomplishing these tasks. He has also included shortcuts for reducing the
time it takes for image management tasks that are often repeated.
Part III: Image Analysis and Enhancement gets into more detail on the
analysis and enhancement uses of Photoshop for forensic examination. These
chapters are relatively self explanatory as to what you will expect to find
inside. Although several of the chapters in Part III use fingerprint images
for explanation of the technique, they could be applied to many different
types of images.
Photoshop CS3 for Forensics Professionals: A Complete Digital Imaging Course
for Investigators is not designed specifically for any one forensic field,
but the techniques it contains can be applied almost universally to them
all. This book isn’t aimed at the first time Photoshop user; however the
techniques are not too complicated that they would only apply to Photoshop
experts. At a cover price of $59.95, and currently available for under $40
through Amazon.com, this book is priced well below many of the standard
forensic texts available. If you use digital imaging for law enforcement
purposes, whether it’s for forensic analysis or crime scene documentation,
this book is a must-have for your reference library.
Steve Everist, LPE
King County Sheriff’s Office
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