VisionAid Lex Air Installation instructions

Hardware Guide Rev B
English
Copyright (C) 2008-2016, VisionAid International Ltd, all rights reserved.

VisionAid International
Page 2
Table of Contents
Table of Contents..................................................................................................1
Introduction..........................................................................................................3
Lex Improvement program ...................................................................................3
Suggestions contact information .......................................................................3
Ownership and intellectual property ....................................................................4
Box contents .........................................................................................................4
Positioning Lex Air for use ....................................................................................5
Lex Air contrast/positioning mat........................................................................5
Unfolding Lex Air camera ...................................................................................6
Folding Lex Air’s camera head for transport ......................................................6
Plugging In..........................................................................................................7
Positioning your documents for capture ..............................................................8
Headphones..........................................................................................................8
FAQ and troubleshooting......................................................................................9
Maintenance.........................................................................................................9
Cleaning ................................................................................................................9
Appendix A: Safety..............................................................................................10
Appendix B: Technical information .....................................................................10

VisionAid International
Page 3
Introduction
Congratulations on choosing the Lex Air digital capture reading system.
The Lex Air combines high speed OCR, speech and reformatted text output with
ease of use and portability. It can capture and read any printed material such as
letters, bank statements, newspapers, food packaging etc. and weighs just 500
grams (1.1 lbs).
Lex Improvement program
Users are the best people to help us improve and develop our products so if you
have any ideas or suggestions, no matter how small, please do contact us.
Suggestions contact information
Please use the following methods to contact us regarding your suggestions:
Email:
sugg[email protected]
Post:
VisionAid International Ltd.
Bridge Lodge, Spalding, Lincolnshire
PE11 3AU
United Kingdom
Phone:
[phone]
Thank you and we wish you many hours of enjoyment with your new portable
dyslexia reading assistant!

VisionAid International
Page 4
Ownership and intellectual property
The software makes use of third party software libraries that are redistributed
under their own respective licenses.
LAME is distributed under the terms of the GNU Lesser General Public License
(LGPL), a copy of which can be found at http://www.gnu.org/licenses/lgpl.html
and is included in the software’s program directory.
OpenCV is distributed under the terms of the Berkeley Software Distribution
(BSD) license, a copy of which is included in the software’s program directory.
Copyright (C) 2000-2008, Intel Corporation, all rights reserved.
Copyright (C) 2009, Willow Garage Inc., all rights reserved.
Third party copyrights are property of their respective owners.
Box contents
Your Lex Air box should contain the following items:
1. Lex Air portable reading system.
2. Drawstring bag for Lex Air.
3. USB cable.
4. USB extension cable.
5. Over ear headphones with in line volume control.
6. White contrast/positioning mat.
7. Laminated quick reference guide.
8. This hardware guide.
9. Paper software instruction manual.
10. Lex software CD (if purchased at the same time as Lex Air)
11. Lex software instruction manual (if purchased with Lex Air)
If any of these items are missing, please contact your local distributor.

VisionAid International
Page 5
Positioning Lex Air for use
Remove Lex Air from its protective drawstring bag and place it on a flat surface.
When doing so, try and ensure that it’s not directly underneath any bright
lighting, as this can affect its accuracy, especially when reading glossy documents.
Lex Air contrast/positioning mat
Lex Air also includes a contrast/positioning mat. This can be used if the surface
where you wish to place the Lex Air is very dark and the item wishing to be read
is small (e.g. a postage receipt, business card etc.).
If you wish to use the contrast mat during capture, simply place the Lex Air within
the precise cut out area of the mat. Please see “Positioning your documents for
capture” on page 8.
Place the camera
inside the cut out area
to use the mat as a
positioning guide
Velcro patch on the
up side of the mat, in
the rear right corner,
indicating this is the
correct side to be
facing upwards.

VisionAid International
Page 6
Unfolding Lex Air camera
Unfold the camera head of the Lex Air camera by grasping the bottom of the
camera head between your thumb and your index finger and lift it upwards until
it stops.
Folding Lex Air’s camera head for transport
To fold Lex Air for transport, simply do the exact opposite of the unfolding
procedure before placing the Lex Air into its drawstring bag with the included
right-angled USB cable.
I
MPORTANT
:
Always ensure that Lex Air’s camera head is folded into its transport position
before placing it into its protective drawstring carry bag. This will help prevent
any damage being done to the Lex Air during transport.

VisionAid International
Plugging In
Lex Air has a relatively short attachable USB cable included. This is designed to be
used in conjunction with laptops.
A USB extension lead is also provided for desktop PC use.
At the end of the USB cable is the USB connector that needs inserting into one of
your computer’s USB ports. The connector has a bump-on stuck onto it. This is to
enable you to feel which way round the connector is when inserting it into a USB
socket.
Bump-on attached to top side of USB
connector (for most computers)
USB Socket
I
MPORTANT
:
Some computers have their USB ports fitted the other way up!
USB connectors will only plug into USB sockets one way round. They do not
require much force, so take great care when inserting them into a socket.
Forcing a USB connector into its socket the wrong way round will break the
socket and or the connector. This is not covered by warranty.

VisionAid International
Page 8
Positioning your documents for capture
Lex Air captures an area slightly larger than an A4 or Letter page.
Documents must be in a landscape orientation with the long edge of the
document going left to right when the Lex Air camera head is facing towards you.
There are two ways to align your documents. The first is to ensure the Lex Air
camera is correctly positioned into the cut out of the contrast / positioning mat.
Then, simply place your document onto the mat, at least 1 cm from the base of
the camera. Providing your document is fully within the area of the mat, it should
be captured by the Lex. Please note that the mat is only a rough guide to the
capture area and is not 100 % precise.
The second method is to align the document visually on screen within the Lex
software once capture has been initialised.
The orientation of the document will not influence the recognition of the text but
remember that to capture an entire A4 or letter page, the document must be in
landscape orientation, otherwise the bottom of the document will be missed.
P
OSITIONING
T
IP
:
Lex Air has powerful
document straightening and
rotation abilities but for the
highest accuracy and speed,
try to position your
document as squarely as
possible and ensure pages
are relatively flat.
Capture Area

VisionAid International
Page 9
Headphones
Lex Air includes a pair of over ear headphones with in-
line volume control. They have a standard 3.5 mm audio
jack connector.
To use the headphones, (or any other that you may
already own), simply plug them into the headphone
socket on your PC or laptop.
To alter the headphone volume, we
recommend using the in-line volume
wheel, located on the headphone wire.
It is also possible to adjust the volume of
the headphones using the volume control on your computer.
FAQ and troubleshooting
Q. I’m connecting the Lex Air to my PC via USB but the Lex software is not
recognising it.
A. Please try using a different USB port. Ensure as you connect the Air to your
computer that you hear the Windows “Duh-dum” noise. Also ensure you
have tried turning your computer off, (shutting it down completely),
removing the camera, waiting 1 minute, then reconnecting it and turning
your computer back on.
Maintenance
The Air camera is designed so that it requires no maintenance.
Cleaning
The Lex Air requires no special cleaning treatment. It can be dusted when
required.
The camera’s lens is recessed within the camera head so it is very unlikely that it
would ever become dirty. If it does, a lint free cotton bud can be used gently to
remove any dust or smears from it.
In-line volume
control

VisionAid International
Page 10
Appendix A: Safety
•Handle the Lex Air with care. Rough handling may damage internal
components and will void your warranty.
•Contact your VisionAid International distributor to service this equipment if
necessary.
•Do not open or remove any parts of the Lex Air as it will void the warranty.
•Do not expose the Lex Air to excessive heat or direct sunlight.
•Do not use the Lex Air near inadequately shielded medical devices.
•To avoid risk of electrical damage, keep your Lex Air away from fluids and
chemicals.
Use of the Lex Air other than described in this manual will exclude it from
warranty.
Appendix B: Technical information
General information
Dimensions folded:
(WxDxH)
6.3 x 5.6 x 8.1 x 25 cm
2.5 x 2.2 x 9.8 inches
Dimensions unfolded with positioning
guide: (WxDxH)
19.3 x 21.2 x 25.5 cm
7.6 x 8.3 x 10 inches
Footprint - no positioning guide (WxD)
6.3 x 5.6 cm
2.5 x 2.2 inches
Weight:
500 grams (1.1 lbs)
Camera resolution:
High resolution 5 MP
Operating conditions
Relative Humidity:
<70%, no condensation
Temperature:
0 to 35 °C
Storage and transport conditions
Relative humidity:
<95%, no condensation
Temperature:
5 to 45 °C