This post is more than 5 years old
1 Rookie
•
90 Posts
0
16909
October 11th, 2011 11:00
Colour Depth via Remote Desktop Protocol
Hi Guys,
Okay... we're had one of our radiographers down to look at vWorkspace and they've found a problem.
When viewing PACS images over RDP the colour depth of the session is only 5-bits of greyscale... and there's no enough quality to use vWorkspace for review of radiography images.
Question: Is it possible to increase the quality of the RDP session over the default?
N.B. This is rather important...
No Events found!
DELL-David Y
228 Posts
1
October 11th, 2011 12:00
Hi Caleb,
The colour depth limitations are somewhat dependant on the OS, as per Lutz question. When making an RDP connection to a Windows XP/2003 host the maximum colur depth supported is 24bit. If the host is Windows 7/2008 then you can specify a colour depth upto 32bit.
It is possible to specify the colour depth for a connection on the vWorkspace client so you may need to increase this setting if not set to the correct value. There is also a Microsoft GPO option to limit the maximum colour depth which may be restricting your colour depth to a poorer quality. This link provides further details on configuring the maximum colour depth group policy option.
Regards
David
DELL-Lutz F
8 Posts
0
October 11th, 2011 11:00
Hi Caleb,
what is the server-side OS in this case ?
Regards,
Lutz.
DELL-David Y
228 Posts
0
October 11th, 2011 12:00
How are your vWorkspace clients configured for colour depth settings, or if using Web Access what is the default setting?
With a Windows 2003 host server you will be able to achieve a maximum colour depth of 24 bit. EOP Graphics Acceleration will not change the colour depth settings.
This article provides details on how to set the colour depth policy settings for Windows 2003. I recall this may be limited to 16bit colour by default, unless you increase it using this policy setting. http://support.microsoft.com/kb/323353
Regards
David
caleb.grant-ohi
1 Rookie
•
90 Posts
0
October 11th, 2011 12:00
Sorry,
It's Windows 2003 R2 Enterprise
I've not got EOP graphics acceleration enabled, clients are WIndows 7 32bit.
caleb.grant-ohi
1 Rookie
•
90 Posts
0
October 11th, 2011 13:00
Okay... I must have missed that setting in my Farm GPO... now set to 32bit, even though 2003 only supports 24-bit.
Out of interest, does anyone know how they make up 24-bit from the RGBA bits?
caleb.grant-ohi
1 Rookie
•
90 Posts
0
October 11th, 2011 14:00
Okay... All working for my Windows Clilents now... phew!
I've now noticed another issue though... iPad clients don't seem to be able to connect at 24-bit. I'm currently looking at the problem but not havign an iPad to test with does seems a little shortsighted...
DELL-David Y
228 Posts
0
October 11th, 2011 14:00
Hi Caleb,
Our iPad Connector User Guide states that 24-bit colour is supported when using an iPad, I can test this for you tomorrow morning if you don't find a solution before then.
DELL-David Y
228 Posts
0
October 13th, 2011 11:00
Hi Caleb,
Were you able to identify the issue with the iPad not being able to connect using 24-bit colour settings. It is the setting that I use on my iPad and is working fine, what are the symptoms of your issue, an error or poor image quality?
Regards
David
caleb.grant-ohi
1 Rookie
•
90 Posts
0
October 13th, 2011 14:00
All sorted... Seems the problem was the iPad Users.