Schutzenberger, Anna | 7 May 20:03 2014
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Specify gamma lookup tables for different monitors

Dear all,

I am using VisionEgg to display a stimulus on two monitors.
The monitors are requiring different gamma lookup tables, however, I only know how to customize a general lookup table in VisionEgg. Do you have a simple solution for how I can specify lookup tables specifically for the monitors?
At the moment I create two Viewports, use the same screen for each of them (with get_default_screen), and define my stimulus for each Viewport, i.e. monitor. I will probably have to create two screens, one for each Viewport, but I would like to avoid having two configuration files for each.
Thanks for your help!
Best,
Anna
Roger Santer [rds5] | 3 Oct 11:47 2013
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FW: Generating a star field

Dear all,

 

I am struggling to develop a star-field stimulus using Vision Egg (similar to the old Windows screen saver, giving the illusion of forward movement). I wondered whether anyone subscribing to this list had worked on anything similar, and whether they’d be willing to share their code with me?

 

Sorry if this seems lazy... I’m very much a novice programmer, and am out of my depth on this one.

 

Thanks in advance,

 

Roger

Shih-Yu Lo | 4 May 03:02 2013
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making quicktime movie

Hi all,

I want to make my experiment stimuli into a QuickTime movie. How should I do? Does anyone have any sample codes? Thanks!

Shih-Yu
Angelique Paulk | 6 Dec 03:56 2012
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Linux VisionEgg

Hi, All,
I had a strange question.  We are using VisonEgg on a Linux Ubuntu 11 as well as on other Windows platforms.  We notice that VisionEgg is updating per frame at 714 Hz on the Linux box, but is at the pre-set OpenGL settings (200 Hz) on Windows.  Is there something different with how OpenGL interfaces with VisionEgg on Linux?
Thank you,
Angelique Paulk
Eamon Caddigan | 22 Oct 02:22 2012
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quicktime.py

Hi all,

I'm having trouble playing quicktime files in VisionEgg. Playback is
choppy (even though the machine is quite capable (16 GB of RAM and a
solid-state disk), and the video is not rendering correctly -- the
image is skewed.

Details:
Windows 7, 64-bit
Python 2.7.3 (32-bit version)
Pygame 1.9.2a0 (32-bit)
visionegg 1.2.1
Quicktime 7.7.2

Example file: https://www.dropbox.com/s/kvvkxxodo8ox8q0/test.mp4

Has anybody seen this?

Thanks,
Eamon
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Andrew Straw | 13 Jul 15:37 2012
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Re: Ubuntu

It is certainly possible to set a 2nd display to > 75Hz in Ubuntu 12.04 
-- we're doing that as standard practice in my lab. Try replacing your 
Screen1 section in /etc/X11/xorg.conf with the following and reboot.

Section "Screen"
     Identifier     "Screen1"
     Device         "Device1"
     Monitor        "Monitor1"
     DefaultDepth    24
     Option         "TwinView" "0"
     Option         "metamodes" "CRT: 1024x768_120 +0+0"
     SubSection     "Display"
         Depth       24
     EndSubSection
EndSection

On 07/13/2012 02:05 PM, Yanqiong Zhou wrote:
> Thanks Andrew,
>
> The second issue should be resolved as you suggestion.
> I tried the nvidia-settings and xrandr command, both of them failed.
> I can change the resolution of both monitors and refresh rate of primary monitor, but not the refresh rate
of second monitor.
> It seems that other people have similar issue caused by display card driver.
> I could not find a suitable driver for my display card in Ubuntu 12.04.
> I probably need go back to Ubuntu 11.
>
> Warm Regards,
>
> Yan-Qiong
>
>
>
> On Fri, Jul 13, 2012 at 5:38 PM, Andrew Straw
<andrew.straw@...<mailto:andrew.straw@...>> wrote:
> Dear Yan-Qiong,
>
> The "nvidia-settings" program should let you adjust the frame rate of your display. See the attached
image. I had to also select my monitor resolution to allow me to set this.
>
> For issue #2, I think this is the same problem as described here: SDL 1.2 meets Gnome
3<http://frozenbyte.com/board/viewtopic.php?f=17&t=4229>. My suggestion is not to open VE
programs in fullscreen mode but rather use a window the size of the display and set the "No frame around
window" option.
>
> Best regards,
> Andrew
>
>
> On 07/12/2012 12:59 PM, Yanqiong Zhou wrote:
>
> Hi Andrew,
>
> Sorry to trouble you.
> I'm Yanqiong, working with Angelique in Bruno's lab.
> I have two stupid questions about running visionegg on the linux system:
> (1) I can't set up the second monitor (LED panels) to a refresh rate higher than 75HZ in Ubuntu12.04, using
NVIDIA Geforce 9600GT. I tried nouveau, NVIDIA 295.49 driver and higher NVIDIA driver... ...
> Do you have any suggestion about the version of Ubuntu and NVIDIA driver that can allow me to set up the
second monitor to a high refresh rate?
>
> (2) When I using vision egg to display visual stimulus on the second monitor in Ubuntu, it showed
"visionegg" on the top-left corner. How can I only show the visual stimulus?
>
> Many thanks for your consideration.
>
> Best Regards,
>
> Yan-Qiong
>
>
>
>
>
> --
> Andrew D. Straw, Ph.D.
> Research Institute of Molecular Pathology (IMP)
> Vienna, Austria
> http://strawlab.org/
>
>
>

--

-- 
Andrew D. Straw, Ph.D.
Research Institute of Molecular Pathology (IMP)
Vienna, Austria
http://strawlab.org/

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Andrew Straw | 13 Jul 09:38 2012
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Re: Ubuntu

Dear Yan-Qiong,

The "nvidia-settings" program should let you adjust the frame rate of your display. See the attached image. I had to also select my monitor resolution to allow me to set this.

For issue #2, I think this is the same problem as described here: SDL 1.2 meets Gnome 3. My suggestion is not to open VE programs in fullscreen mode but rather use a window the size of the display and set the "No frame around window" option.

Best regards,
Andrew

On 07/12/2012 12:59 PM, Yanqiong Zhou wrote:
Hi Andrew, Sorry to trouble you. I'm Yanqiong, working with Angelique in Bruno's lab. I have two stupid questions about running visionegg on the linux system: (1) I can't set up the second monitor (LED panels) to a refresh rate higher than 75HZ in Ubuntu12.04, using NVIDIA Geforce 9600GT. I tried nouveau, NVIDIA 295.49 driver and higher NVIDIA driver... ... Do you have any suggestion about the version of Ubuntu and NVIDIA driver that can allow me to set up the second monitor to a high refresh rate? (2) When I using vision egg to display visual stimulus on the second monitor in Ubuntu, it showed "visionegg" on the top-left corner. How can I only show the visual stimulus? Many thanks for your consideration. Best Regards, Yan-Qiong

-- Andrew D. Straw, Ph.D. Research Institute of Molecular Pathology (IMP) Vienna, Austria http://strawlab.org/
Andrew Straw | 16 Apr 07:36 2012
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Re: SinGrating2D function

Yes, but set it much more than 1, e.g. 1e6.

On 16-Apr-12 06:32, Shih-Yu Lo wrote:
P {margin-top:0;margin-bottom:0;}
Hi all,

In the SinGrating2D fuction, if I set the contrast parameter more than 1, then the grating becomes a square wave. Is it true?




-- Andrew D. Straw, Ph.D. Research Institute of Molecular Pathology (IMP) Vienna, Austria http://strawlab.org/
Shih-Yu Lo | 16 Apr 07:32 2012
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SinGrating2D function

Hi all,

In the SinGrating2D fuction, if I set the contrast parameter more than 1, then the grating becomes a square wave. Is it true?


Floris van Breugel | 21 Mar 21:48 2012
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specifying screen to run visionegg

Hi all,

If I have multiple monitors and/or projectors, how can I specify in the visionegg script which projector I want to run the display on?

Thanks!

- Floris


Paul Dick | 28 Feb 19:13 2012
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VisionEgg Error: Index out of bounds?

Hello All,

I am a neuroscience masters student working at the U of S, where we use VisionEgg in our experiments. We recently had a computer crash on us, and have been scrambling since to get everything up and running again (we use an integrated program (GLVS) that uses vision egg). Everything was looking fine, but now the program seems to be crashing every couple of stimuli. The error message ends with:

VisionEgg's core.py, line 1522, in tick

self.timing_histogram[index] += 1

IndexError: index out of bounds

 

We are using VisionEgg 1.0 with python 2.4 and win32. Does anyone have any recommendations for us? We would greatly appreciate it.

Paul Dick

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Gmane