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<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Hee-su,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'> It
was not my intent to put all or even most of the viewing parameters directly in
the “viewer” classes. Perhaps I did this incorrectly, but I wrote
requirements that specify what functionality the toolkit must support, not how
it should be implemented or organized in the c++ classes. I was thinking that we
first define “what” the toolkit must support and once that is
mostly done to define “how” it should be implemented. So I thought
that during design discussions I would then propose the organization of classes
that would achieve the “functional requirements” we discussed today.
That is when the specific classes will be defined (e.g. image object representation)
and a deeper set of “implementation requirements” will define class
organization and behavior. Let me know if it is standard convention to do both
at once and I will revise the requirements accordingly.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>- Rick<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><b><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma;font-weight:bold'>From:</span></font></b><font size=2
face=Tahoma><span style='font-size:10.0pt;font-family:Tahoma'> igstk-developers-bounces+rick.avila=kitware.com@public.kitware.com
[mailto:igstk-developers-bounces+rick.avila=kitware.com@public.kitware.com] <b><span
style='font-weight:bold'>On Behalf Of </span></b>Hee-su Kim<br>
<b><span style='font-weight:bold'>Sent:</span></b> Thursday, June 30, 2005 4:00
PM<br>
<b><span style='font-weight:bold'>To:</span></b> IGSTK-developers<br>
<b><span style='font-weight:bold'>Subject:</span></b> [IGSTK-Developers] Viewer
Requirements</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=3 face=Gulim><span style='font-size:12.0pt'><o:p> </o:p></span></font></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hi, folks:</span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I have a question. What is the difference between View and
Viewer?</span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I'll just give the outline.</span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I think View just handles object representations, camera and
annotation display parameters. (and updating..)</span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>When viewing images, there are a lot of parameters such
as W/L, slicing, volume rendering method, volume rendering parameters and so
on..</span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I think that View requirement will be "to support
displaying object representation".. not "to support specific
kinds of rendering"</span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>There should be ImageSliceRepresentation and
ImageVolumeRepresentation.</span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>ImageSliceRepresentation will have W/L, slicing
parameters(like sagittal, coronal, something like that, and slice number),
and other necessary parameters. </span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Patient information is in ImageObject. </span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Some annotations (such as Sagittal View, patient info,
...) will be displayed by View but I think this should
be set by an application as multiple images or the annotation for
another kind of object(not image) might be displayed.</span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>ImageVolumeRepresentation will have volume rendering-related
parameters. (opacity transfer function, color transfer function, method of
rendering(raycasting, texture mapping, ...), something like that)</span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Both representations will have their own pipelines to render
images.</span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>View still supports every kind of rendering but not
responsible for managing parameters or constructing pipelines for specific
kind of rendering.</span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>If View deals with image rendering options, then View class
will be messy. (there will be a lot of methods for setting parameters)</span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>With ObjectRepresentation and SpatialObject, multiple images
could be displayed readily.</span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>These design considerations were already made by IGSTK
developers...</span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I'm just reminding it.. </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Does this make sense?</span></font><o:p></o:p></p>
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12.0pt;font-family:"Times New Roman"'> </span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I thought it's strange that Viewer requirements are too
specific with every rendering option and Image seems tied to Viewer. I
think Viewer requirements need abstraction and ObjectRepresentation deals with
specific rendering options.</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>I might be wrong. Anyway, this was what I thought.</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Regards,</span></font><o:p></o:p></p>
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<p class=MsoNormal><font size=2 face=Arial><span style='font-size:10.0pt;
font-family:Arial'>Hee-Su</span></font><o:p></o:p></p>
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