Bewegungsdetektor
A software to simulate and learn about the elementary motion detector (EMD) proposed by B. Hassenstein and W. Reichardt (1956).
The online documentation is not complete yet and will improve over time.
Don't hesitate to contact me for further information!
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Table of Content
Welcome - a brief introduction about the program
License - terms of use
Requirements - what is needed to run this program?
Installation - installation of the program
Usage - how to use the programm
Download - get your copy here
FAQ - frequently asked questions
History - history and future develoment
Welcome
This is a little application to learn and visualize the principles of the famous elementary motion detector (EMD) proposed by by B. Hassenstein and W. Reichardt (1956). This software is written by Ulrich Beckers and is mainly intended for eductional purposes.
This software is freeware. You may use it on your own risk. You are free to copy and distribute the archive. When distributing and/or spreading the program you must not:
This software is written in the language "Hollywood" and thus available for many systems. There is no additional software required and it should run on bog standard computers running one of the supported operating systems. You may need a processor better not less than 300 MHz and maybe a few MB of available RAM. To sum it up, if you don't use something very special or antique you probably will be able to run this program.
The operating systems supported are:
Binaries for AmigaOS ppc, AROS and OS X (x86) are not provided on this site and are available upon request only.
Once you've downloaded the archive for your operating system, unpack the archive and copy it to any destination you like. You may put it on your harddsik or on a usb key or even on a server. There is no special installation process required
Just doubleclick the icon to launch the program. On the welcome screen you are asked to either start the program as a black box or with the underlying circuit shown. Chose one of the both options. If you select "black box" you will see the following:
On top of the window there is the input for the system. Move the mouse pointer across the grey box
to provide a visual motion input for the system. The yellow curve shaped things r1 and r2 denote two photoreceptors.If you move the mouse
outside the box the mouse sigal doesn't get recepted by the receptors.
Under the question mark the actual circuit is hidden. In the circuit version it is of course shown and you can see the signal travelling
along the circuit.
On the bottom there is an output region shown where the detector puts its output signal.
The circuit version comes with an alterative option to change a property of the detector. That one should be rather self-explanaining.
You can quit the program by hitting the quit button or clicking the close gadget of the window or just by pressing Ctrl-C.
Download
Grab your copy from here:
Windows x86 binary - V1.0 - Download
MorphOS ppc binary - V1.0 - Download
The archives are packed with lha. That's a common packer on MorphOS and the most common unpackers on Windows should be able to decrunch it, too.
In some cases some signals get lost while travelling through the detector - why is that?
If there are more than 300 signal sprites present these get discarded. The limitation of 300 sprites may be removed in a next release.
I would like to provide a flash-like input to the system or several objects at the same time and not only the rather dull mouse pointer. How can
I do that?
With the current version this is not possible, but an update will bring those features
Why these ugly colors and 80ies style?
I just was too lazy yet to do a proper design. If I am bored enough I may do so in future.
V1.0 released on 11-11-2009
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Cheers!
Document history:
back to main page and contact information
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© U. Beckers