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The application
software and the lighting are very application dependant and have
to be looked at on a per application per customer basis. But the
rest of the stack, the Platform, The Frame Grabber, the Camera and
the Lens are available as a preintegrated black box system from
Interay. A bundle - manufactured and integrated by Interay with
the possibility of adding customised options.
These machine vision
systems are sold under the name of TriVision systems. A TriVision
system consists of 3 fixed parts : the Platform, Framegrabber and
Camera while the lens can be chosen according to the physical
requirements of the application.
A trivision
system based on a camera manufactured by Interay looks like this.
Up to 5 Interay
cameras can be connected to one of the vision systems 1394
interfaces.The camera shown here is a
low
cost camera for simple image
processing applications.
But the interay
developed software will also work with all standard
1394 cameras such as cameras from SONY.
tbd.
tbd
Tri
vision tools
A tool set for 1394
Machine vision.
Key words
- Open HW
vision platform
- Open SW
vision standards
- Industrial
and machine vision
- High
level functionality with simple API
- integrated
real time features and support
- integrated
motion vision synchronisation
- Partnerships
Open
StandardsVision Software
TriVision
software tools for machine vision can run on XP, win 2000 or
embedded XP operating systems . Truly open software conforming to
the IEEE 1394 CSR and 1394 camera interface standards. TriVision
tools provide maxmimum functionality encapsulated inside high
level tools in order to provide the simplest and most intuitive
application interface possible.
TriVision
tools provide an integrated API to realtime image processing
aspects such as synchronisdation and triggering. TriVision tools
have been developed from the ground up to solve common industrial
problems. TriVision can be expanded with an integrated motion
vision and I/O API.
Open
Systems Vision Platform
TriVision software
tools for machine vision can run on any PC Hardware Platform with
a 1394 OHCI interface TriVison systems are compatable with the
Firepoint I/O system from Nyquist
TriVision 1394
Machine vision tools
3 discrete SW
products provide a multi level API to machine vision applications
1. TriVision
virtual frame grabber
C API
Select, Sync, Snap,
Multiple
simultaneous camera interface
2. 1394 Camera
configurator
Interactive utility
and C API
Controls multiple
1394 cameras
Defines Multiple
Regions of Interest
Configures
Triggering I/O and synchronisation events
Provides access to
all camera attributes and settings
3. TriVision
image processing Server
Real Time Embedded
image processing system
Run Time
Environment and development tools
TriVision
virtual frame grabber
Virtual frame grabber
for multiple 1394 cameras provides a simple "select, sync,
snap" interface to any application.
TriVision
1394 camera configurator
Offers a complete
integrated package for grabbing, camera configuration and image
processing.
TriVision
embedded vision server
Offers a complete
integrated package for grabbing, camera configuration and image
processing.
In order to
assist with the selection of lenses for a machine vision
application some examples are presented here. Three lenses from
CANON are used to create a range of possibilities.
The tree lens types
are.
| Type |
JF
16 1.4 |
VF
25 |
HV
75 |
| F
(mm) |
16 |
25 |
7.5
- 75 |
| Aperture |
1.4 |
1.4 |
1.7 |
| |
![[Image]](images/vf25.png) |
![[Image]](images/jf16.jpg) |
![[Image]](images/hv7517.jpg) |
Image
examples
The images
below were taken with these lenses. The distance to the
"chip" object from the lens was always the same in each
case. Only the lens was changed and refocussed. This distance was
approximatrely 20 cm. The original format of the image (and the
camera sensor) was 640 by 480.
| JF
16 |
VF
25 |
![[Image]](images/test1.jpg) |
![[Image]](images/test2.jpg) |
| A
normal view for this application |
This
was taken with a 5 mm extension tube because otherwise it ws
impossible to focus the lens at this distance |
| HV
75 |
HV
75 |
![[Image]](images/test3.jpg) |
![[Image]](images/test4.jpg) |
| The
HV 75 is a vario focus lens and it is zoomed out to the
maximum for this shot. |
Here
the HV 75 is zoomed in to the maximum |
Here we can view the effect of
using a 5 mm extension tube with the HV 75 vario focus lens.
| HV
75 with 5 mm extension tube |
HV
75 with 5 mm extension tube |
![[Image]](images/test5.jpg) |
![[Image]](images/test6.jpg) |
| Zoomed
OUT to a maximum |
Zoomed
IN to a maximum |
It can be
seen that the HV 75 when used in combination with a 5 mm extension
tube encompasses an enormous range of possibilities for changing
filed of view or object magnification while keeping the distance
object to camera constant.
This is the subject
of on going development at Interay.
Please contact
N.P.Ray at Interay for more information.
Vision
Lab (Van der Loosdrecht machine Vision)
For customers
requiring image processing tools Interay sells the Vision
Lab development and runtime environment with its TriVision
systems.
You can download a
Vision Lab presentation here.
For more information
about Vision Lab and image processing go to
Consulting
and special algorythyms
Sometimes special
problems require special algorithyms and the deveopment of
specialised image processing applications. Interay can perfom this
software development but will often make use of experts in the
field.
Lighting
systems and advice
Interay reccomends
the company Vision Light Tech for the provision of specilised
machine vision lighting systems and advice.
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