[Insight-developers] Raw image IO factory?

Mon, 03 Feb 2003 13:58:14 -0500

I've made the changes, but will not check-in until after the first tag.

About the extensions...they seemed like a good idea at the time and I 
hesitate to change them, but I am open to adding other aliases :)

s

Miller, James V (Research) wrote:
> Boy, it going to take me a while to engrain these extensions
> into my subconscious.  My internal parse table maps "mhd" to
> mean "meta header and data in one file" and "mha" to mean 
> something like "meta header alias" (or meta header in one file 
> with an external file for data). The latter is a bit of a stretch.
> 
> But this is the opposite of what they mean.
> 
> I probably would have used the extensions:
> 
> "mh" - meta header that indicates the path to a file for the raw data
> "mhd" - meta header and data in one file
> 
> 
> 
> 
>>-----Original Message-----
>>From: Stephen R. Aylward [mailto:aylward@unc.edu]
>>Sent: Friday, January 31, 2003 2:17 PM
>>To: Miller, James V (Research)
>>Cc: 'Luis Ibanez'; Insight-developers (E-mail)
>>Subject: Re: [Insight-developers] Raw image IO factory?
>>
>>
>>Hi,
>>
>>Sorry that I couldn't make the tcon...busy selling my soul for 
>>additional funding...the bid is up to $2....
>>
>>Anyway, '.mhd' was originally intended to indicate a metaHeader file 
>>that only contained the name of the data file while '.mha' 
>>was intended 
>>to indicate a file containing header and data ('all').  But, 
>>we stopped 
>>using that when we thought ITK wasn't going to use the postfix to 
>>distinguish files...perhaps now we should return to that....
>>
>>Stephen
>>
>>Miller, James V (Research) wrote:
>>
>>>Luis,
>>>
>>>Using the meta image format as an output factory worked 
>>>for me.  So I'll use that.
>>>
>>>What extension should I use?  It seems to respond to both
>>>"mha" and "mhd".
>>>
>>>Jim
>>>
>>>
>>>
>>>
>>>
>>>>-----Original Message-----
>>>>From: Miller, James V (Research) 
>>>>Sent: Friday, January 31, 2003 2:03 PM
>>>>To: 'Luis Ibanez'
>>>>Cc: Insight-developers (E-mail)
>>>>Subject: RE: [Insight-developers] Raw image IO factory?
>>>>
>>>>
>>>>I guess what I what is to be able to write 
>>>>out a raw image using a factory.  I want a command
>>>>line program that does
>>>>
>>>>./MyProgram input.png output.raw
>>>>
>>>>and have it write out a raw image.  And if I do
>>>>
>>>>./MyProgram input.png output.png
>>>>
>>>>it would write a png file.
>>>>
>>>>I agree that you loose the spacing and size, etc. But I am 
>>>>trying to do a quick and dirty integration of an ITK algorithm
>>>>to a legacy system and want to just rig up an IPC process.  So
>>>>my existing app tells my ITK app to run on a particular input
>>>>file and output a particular output file which it will then 
>>>>read (since they app already knows the size and spacing, it can 
>>>>just do a bulk read).
>>>>
>>>>Can I use the Meta image as an output factory?  If so, that will
>>>>do what I want.
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>>-----Original Message-----
>>>>>From: Luis Ibanez [mailto:luis.ibanez@kitware.com]
>>>>>Sent: Friday, January 31, 2003 1:53 PM
>>>>>To: Miller, James V (Research)
>>>>>Cc: Insight-developers (E-mail)
>>>>>Subject: Re: [Insight-developers] Raw image IO factory?
>>>>>
>>>>>
>>>>>Hi Jim,
>>>>>
>>>>>The problem with Raw is that even if we set a factory
>>>>>that figures out the correct ImageIO from the file
>>>>>extension, there is no easy way to arrange for the
>>>>>additional image information to be passed to the
>>>>>ImageIO.
>>>>>
>>>>>In the current mode for raw, the user has to instantiate
>>>>>the RawImageIO object, pass the spacing, size and origin
>>>>>of the image, and then trigger the execution of the reader.
>>>>>
>>>>>I personaly think that being so easy to create a MetaImage
>>>>>header or a VTK header for a raw file, we should rather
>>>>>encourage users to use those mechanism as a way of 'wrapping'
>>>>>a raw file.
>>>>>
>>>>>At the end of the day, a 'raw' image is an incomplete
>>>>>file and there is no way to figure out the content
>>>>>without the additional information.
>>>>>
>>>>>
>>>>>
>>>>>  Luis
>>>>>
>>>>>
>>>>>-----------------------------------------
>>>>>
>>>>>Miller, James V (Research) wrote:
>>>>>
>>>>>
>>>>>
>>>>>>Should there be a raw image IO factory for raw images?
>>>>>>
>>>>>>
>>>>>>
>>>>>>There is no RawImageIOFactory in the system.  Currently the 
>>>>>
>>>>>RawImageIO 
>>>>>
>>>>>
>>>>>>object says it can write a file as long as there is a 
>>>>>
>>>>>filename.  So I 
>>>>>
>>>>>
>>>>>>imagine this is why there is not a corresponding 
>>>>>
>>>>RawImageIOFactory 
>>>>
>>>>
>>>>>>(since it would respond yes to everything). 
>>>>>>
>>>>>>
>>>>>>
>>>>>>But when running in factory mode, could a RawImageIOFactory 
>>>>>
>>>>>respond to 
>>>>>
>>>>>
>>>>>>being able to read/write files if the extension is ".raw"?
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>*Jim Miller*
>>>>>>*/_____________________________________/*
>>>>>>/Visualization & Computer Vision//
>>>>>>/GE Research/
>>>>>>/Bldg. KW, Room C218B/
>>>>>>/P.O. Box 8, Schenectady NY 12301/
>>>>>>
>>>>>>//_millerjv@research.ge.com <mailto:millerjv@research.ge.com>_/
>>>>>>
>>>>>>/_james.miller@research.ge.com_/
>>>>>>/(518) 387-4005, Dial Comm: 8*833-4005, /
>>>>>>/Cell: (518) 505-7065, Fax: (518) 387-6981/
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>
>>>>>
>>>>>
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>>>
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>>
>>
>>-- 
>>===============================================
>>Dr. Stephen R. Aylward
>>Assistant Professor of Radiology
>>Adjunct Assistant Professor of Computer Science
>>http://caddlab.rad.unc.edu
>>aylward@unc.edu
>>(919) 966-9695
>>
> 
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-- 
===============================================
Dr. Stephen R. Aylward
Assistant Professor of Radiology
Adjunct Assistant Professor of Computer Science
http://caddlab.rad.unc.edu
aylward@unc.edu
(919) 966-9695