[Insight-users] Testing GPU-based Median Filters

[Robert.Atwood at diamond.ac.uk]

 Hi,

I'd be especially interested if 'large' can be in excess of 5 Gb up to
100 Gb -- especially if multiple GPU boards can be used to advantage
obviously requiring some strategy for sending sections to the GPU's.

1. More generally I'd think  'small' is smaller than the GPU board
memory
                     'medium' is larger than GPU board memory but much
smaller than main memory
                     'large' is larger than main memory 
The total (input + output ) may be the important size to consider.

2. no opinion

3. I find values greater than radius=3 not especially useful,  but other
people may have other requirements. Radius=1 or 2 (kernel width 3 or 5)
is what I use  most often. 

I can try versions on the system here (multi-Tesla 1070 units) some time

Robert




-----Original Message-----
From: insight-users-bounces at itk.org
[mailto:insight-users-bounces at itk.org] On Behalf Of Christopher Share
Sent: 11 January 2010 23:19
To: insight-users at itk.org
Subject: [Insight-users] Testing GPU-based Median Filters

Hi,

I'm in the process of developing several different GPU-based median
filters for the ITK (as part of the 09/10 VPAC Summer Project - this
year's project doesn't have a web page yet but here's a link to last
years' - http://www.vpac.org/?q=node/290). I have a question regarding
the testing of the filters. I'd like to test the performance of the GPU
filters under different conditions, however I'm not clear about how
these filters are used in practice.

For the purposes of testing the filters I have the following questions:

1. What image sizes should be tested? I was thinking of "small",
"medium" and "large" but I'm not sure what these sizes would be wrt to
the ITK. 

2. Should I test RGB/RGBA images as well as greyscale images?

3. For the median filter case, what radius's should be tested? Should
different radius's in different directions be tested?

Cheers,

Chris Share
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