If you have any questions, comments, or problems with the GVU Macintoshes, please contact Steve Park at spark@cc.gatech.edu for assistance. Thank you for your cooperation!
Go to Video Lab Home Page.
Ekta 100
Ektar 25
Polachrome 40
Fujichrome 50
Kodacolor 100
T-Max 100
NOTE: You must provide your own film!
Also NOTE: Due to the nature of computer photography, when processing 35mm print film, instruct the film lab to override the "Auto Correction" control on their processor. This will assure the colors in your images appear correctly in the prints.
The focus command can be used to send images to the film recorder:
focus [-d xx] [-D] [-s xx] [-i xx] [-e xx] [-P xx] [-f xx] [-c xx]
[-R xx] [-x xx] [-y xx] [-G xx] -F filename
USAGE:
-F filename Name of the file to shoot. (REQUIRED)
[-d] SCSI ID. ( default: 6 )
[-C] SCSI Controller Number. ( default: 0 )
[-f] Image Format [Default - SGI RASTER].
1 for TIFF
2 for SGI RASTER [Default]
3 for SUN RASTER
4 for ALIAS
5 for WAVEFRONT
6 for SOFTIMAGE
7 for PICT
[-c] Number of prints. ( default: 1)
[-R] Resize the image.
( Without the x or y option the image is
automatically resized to fit the film)
[-x] Width (in pixels) to resize to.
( Height is automatically determined from aspect
ratio of image. The 'R' parameter should precede
this parameter. )
[-y] Height (in pixels) to resize to.
( Width is automatically determined from aspect
ratio of image. The 'R' parameter should precede
this parameter. )
NOTE: Specifying BOTH -x and -y resizes the image
to the specific size, over-riding aspect ratio of
image.
Images larger than 2048 X 1600 are automatically
resized to fit the film.
[-G] Gamma value ( 1.0, 1.8 or 2.2 )[default 1.8].
This following is an introduction to the use of the GVU Usability Lab. It addresses using the lab "as is". If you have special needs that require changing the lab configuration, you're on your own.
The Usability Lab Calendar is accesed via the GVU Lab Macintoshes. To schedule
usage, click on the Now-Up-To-Date icon labled "Usability".
Enter your name onto the schedule during the time slot that you wish
to reserve. Be sure to list
your email address so that you can be contacted, if necessary. It is also a
good idea to email the GVU Lab Manager
Steve)
and the Usability Lab coordinator
(Margaret )
when you have scheduled
a session, so that they can advise you on any particular changes to the
schedule or equipment in the Usability Lab.
Sometimes patrons of the Usability Lab wish to video tape their Usability
experiments. Under such cases, the simultaneous use of the Video Lab is
required. If your experiment requires the use of the video facilities, you
will need to schedule use of the Video Lab as well. This is done in a manner
similar to scheduling the Usability Lab: one simply fills in the appropriate
time slot in the Video Lab calendar after clicking on the corresponding
Now-Up-To-Date icon.
Lab patrons are encouraged to go to Lab Macs to do their scheduling first. If
for some reason you are unable to schedule your time on one of the Macs, or if
there is another conflict, please contact
Margaret Beier.
You may bring in other equipment if the existing equipment is not enough for
your needs (see section on "Using Your Own Stuff") below.
Please try not to leave personal files on the lab machines. Also, don't
change their configuration permanently without first notifying and getting
permission from the GVU Lab Managers.
The audio circuit starts in the two microphones (lab and observation area).
The lab microphone is the left channel, the observation microphone is the right
channel. Both microphones can be mixed using the stereo audio mixer. The
output of the audio mixer goes to the VCRs.
The audio and video equipment is moderately complex, and you should become
familiar with it before you try to run sessions. This primer is just that: a
primer. Use it as a guide to learn to operate the equipment, not as a cook
book reference manual. The manuals for the A/V equipment are kept in the
GVU Lab Manager's office (CCB 210).
You may check them out from him if you need them.
To use the video equipment, follow these steps:
Scheduling the Usability Lab.
There are two mechanisms to schedule time to use the Usability Lab: the
Now-Up-To-Date calendar on the GVU Lab Macs,
and contacting the Usability Lab Coordinator,
Margaret Beier. Usability Lab Access.
Lab access is by means of the combination lock. The combination code an be
obtained from either Margaret Beier, one of the GVU Lab Managers in CCB 210,
or Joan Morton (in the GVU front office). Always lock the lab when you
leave. Furthermore, you are responsible for leaving the lab clean and in the
same condition that you found it. The lab is not to be used for work other
than experiments. Computer Equipment.
At present, the Usability lab has a Sun Sparc5 and a Sun Sparc20. Both machines
are fully networked, and have large 20" color monitors. The Sparc20 is
connected such that the video output can be directly videotaped. Audio/Video Equipment.
Currently we have in the lab the following audio and video equipment:
In addition, the Video Lab has the following usability relatedequipment:
If you need additional equipment, you'll have to provide it. Check with the
GVU Lab Manager. How to Use the Audio/Video Equipment.
Video signals are first generated by the cameras. Two of the cameras may be
connected to the video mixer (note that you can only use two of the three
cameras in any one experiment session). The mixer controls how to mix and
match the camera signals, and outputs signals to the monitors and VCRs. The
signal going to the VCRs and the left monitor is routed through the clock/timer
so that it can be timestamped.
To use the audio equipment, decide which microphones you are going to use:
none, one, or both. If none, forget about this paragraph. If one or two, turn
on the audio mixer, and set it up. Remember: left mike is the lab
(L=Left=Lab), the right one is the observation area (R=Right=obseRvation)! If
you are using the lab in the observation area, be very careful with feedback.
Turn off the volume in both monitors, and use headphones. A headphone can be
plugged in to the audio mixer's headphone jack.
The other two functions you will use are zoom (tele/wide) and focus
(near/far).
Using Your Own Stuff.
If the existing equipment is not enough for your needs, you may, in general,
bring your own. Always check with one of the GVU Lab Managers.
You are responsible for the security
of your equipment, and you should lock down any valuable items. You should
also try to set up your equipment in the lab in such a way that will not
interfere with other projects using the lab. Help.
I'm sure you have lots of questions. We are here to help. The most important
piece of advice is to become familiar with the equipment and its operation
before you start your experiment. Do not try to improvise during sessions:
it generally doesn't work. Come and try out the equipment, and if you have
questions ask. Here are some names and email addresses:
Type of Help Who to Ask
----------------------------- --------------------------
Equipment questions Steve Park (spark@cc)
Access to the lab Margaret Beier (magbeier@cc)
Steve Park (spark@cc)
Joan Morton (joan@cc)
Policies and regulations Albert Badre (badre@cc)
Scheduling Margaret Beier (magbeier@cc)
Problems and breakdowns Steve Park (spark@cc)
SciVis Lab.
The SciVis Lab is devoted to research in the area of scientifc visualization.
Usage of the SciVis lab facilities is limited to those who are authorized to
receive an account. Any person performing scientific visualization research
can apply for an account in this lab.