Allied Vision Technologies AVT Stingray Manual de usuario descargar pdf (Pagina 4)

AVT Stingray

ALLIED VISION TECHNOLOGIES GMBH Marketing and Sales | Taschenweg 2a | D-07646 Stadtroda | Germany |Phone: +49 (0)36428 6770

Fax: +49 (0)36428 677-24 | www.alliedvisiontec.com | info@alliedvisiontec.com

Powerful by Smart Features

Despite its small construction the STINGRAY is

equipped with a large number of intelligent featu-

res such as real time shading correction, LUT, white

balance, color correction, auto features, hue and

saturation that can optically enhance the image

content and optimize it for later image processing,

but without increasing the PC workload. The opti-

mization that takes place in the camera actually

enables the examination to be made simpler, quik-

ker, and more reliable, thus saving processor load

in many different ways. The frame grabber features

emulate the frame grabber, which becomes redun-

dant with FireWire. The functions usually found in

grabbers are integrated into STINGRAY, which

makes a grabber superfluous.

Speed increase modes (packed 12 bit): up to

33% faster

The FireWire standard (IEEE 1394) developed in

1995 was designed and optimized for image data of

8 and 16 bits per pixel. For images with 10, 12, or

14 bits per pixel, there are unused reserves in this

standard, which unnecessarily limit the transfer

rate. AVT utilizes these unused reserves and inte-

grated a “packed 12-bit” mode into STINGRAY.

4x and 8x binning: lots of sensitivity

Binning is the name of the function in which the

camera combines neighboring pixels. When two

pixels are combined, the image’s resolution is cut

in half, but the sensitivity is increased by 6dB (+

100%, meaning it is doubled) and the signal noise

interval increases by 3dB (+ 41%).

Nearly every AVT camera is equipped with a similar

binning function, which can combine pixels both

vertically and horizontally. The STINGRAY has now

been expanded to include 4x and 8x binning. That

means that per axis 4 or 8 neighboring pixels are

added together. In this way, startlingly high sensi-

tivities and noise intervals can be reached, which

cannot be achieved via a normal photographic

mode.

SIS - “Secure Image Signature” (to be designed

for) : valuable assistance for system develop-

ment

This function stamps the transferred image with

various important data and camera settings, which

were valid at the time of exposure, in a machine-

readable form. On the PC side, answers to various

questions are captured and engrained onto the

image so that they are always available:

The SIS function simplifies the control and hand-

ling of the large volume of data, monitoring the

trigger modules of the vision system, and opening

up new possibilities in the development and

debugging phase. With SIS, developers have the

opportunity to get their system into an error-free

mass production status faster and can reduce com-

plexity and costs at the same time. This function

has the potential to directly affect the return on

investment!

Sequence mode (to be designed for): greater

speed through prefabricated parameter lists

How can throughput be increased and optimized

through automated inspection? What is the fas-

test way to get a camera to provide a sequence of

images with different settings?

The sequence mode of STINGRAY will set new stan-

dards in this area: A list inside the camera enables

STINGRAY to store over 30 different parameter sets

in advance. In the automated inspection process,

all that is then required is the trigger, in order to

process the list in the camera; it is no longer

necessary to reset the parameters. Since the pro-

cessing of the list can be stopped via an input port

of the camera, event-based camera control is still

possible.

Quick format change modes: fast intuitive chan-

ge of settings

In sequence mode it is possible to upload prefabri-

cated parameter sets into the camera in order to

work with them as quickly as possible. This is only

possible when these records are known in advance

– as in any typical automation process. However,

there are also many applications in which the

camera settings have to be adapted to situations

intuitively – and from image to image!

For this kind of application, AVT has added the

“quick format change modes” to STINGRAY, in

which the new values, which have already been

transferred to the camera, can always be activated

for the next image.

Flexible AOI / flexible speed (full Format_7 sup-

port)

In addition to a number of different standard for-

mats taken from video technology, the STINGRAY

can also handle "free-style” formats in which the

AOI and the frame rate (such as free run, software

trigger, and hardware trigger) can be set at will

and altered online.

Angled head system (optional)

Despite its many smart functions STINGRAY is very

compact in construction. If, however, the camera

still does not fit into the system, one solution may

be the STINGRAY angled head system, with which it

can be adjusted to fit almost any space require-

ments. A modular housing concept allows the user

to choose between various different angled head

models and to shorten the effective camera length

by up to 9 centimeters.

Software

Image processing with the STINGRAY uses the plug

& play principle. The software from Allied Vision

Technologies supports both still images

(WIA/TWAIN) and video stream (video capture and

preview), as well as the integration of the camera

via its own API. Digital cameras can be used nowa-

days just as easily for image processing procedures

as, by way of comparison, analog cameras and fra-

megrabbers – plus, of course, the images are bet-

ter and the speed is higher. AVT software creates

the right conditions for the simplest possible inte-

gration, and is available from AVT as a comfortable

download. AVT can also supply a suitable software

development kit (SDK) together with a "viewer”

that gives you access to all the tools needed for

customer-specific applications. AVT can currently

supply three different software packages for a wide

variety of requirements. They are available as a free

download from the

AVT website: www.alliedvisiontec.com

AVT FirePackage

This enables you to gain 100-percent control over

the 1394 bus

AVT Active FirePackage

For full compatibility with WDM and DirectX

AVT Fire4Linux

The package for the Linux world

The STINGRAY family is compatible with all image-

processing systems in general use such as National

Instruments Labview, MVTec Halcon, MVTec Active

Vision Tools, Stemmer Imaging Common Vision

Blox, Neurocheck, Scorpion, and Matrox Inspector,

which support the FireWire standard.

FireWire is a trademark of Apple Computer, Inc.

without the prior written consent of the copyright owner.

The information presented in this document does not form part of

any quotation or contract, is believed to be accurate and reliable,

and may be changed at any time without notice. No liability will be

accepted by the publisher for any consequences of its use.

Publication there of does not convey or imply any licence under

patent or other industrial or intellectual property rights.

Printed in Germany - 3/2008

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