[Insight-developers] utjOrientedImage.h

[Johnson, Hans]

Bill,

I²ve been doing some more research on the itkOrientedImage filter.  It looks
like there is a nice WIKI page at
http://www.itk.org/Wiki/Proposals:Oriented_Image_Registration that lists
several tasks that needed to be accomplished about 80% down the page.  The
wiki claims that none of this is done, but it looks like it is in CVS.

2)  Could you please confirm that these tasks were done?

Thanks,
Hans
 

On 7/25/08 9:22 PM, "Bill Lorensen" <bill.lorensen at gmail.com> wrote:

> Hans,
> 
> The OrientedImage uses an image direction cosines when transforming
> physical points to indexes and vice versa. It is in working condition.
> The #else's are there to show a more readable version of the code. I
> used template meta-programming to implement the transformations in an
> efficient way. Unfortunately, the meta-programming code is hard to
> follow.
> 
> The ITK_USE_ORIENTED_IMAGE_DIRECTION is newer code to properly handle
> gradient computations when directions are present. I suspect it will
> be defined by default in a future release.
> 
> I recommend using OrientedImage if your images have different directions.
> 
> Admittedly, the code should be documented better. Can you file a bug
> report for that and assign it to me?
> 
> Regards,
> 
> Bill
> 
> On Fri, Jul 25, 2008 at 4:08 PM, Hans Johnson <hans.j.johnson at gmail.com>
> wrote:
>> > Bill,
>> >
>> > I've been looking at the itkOrientedImge class and would appreciate your
>> > input.
>> >
>> > 1)  The documentation for this class is very limited, and does not state >>
how
>> > an itkOrientedImage is different from an itkImage.  It just states what
>> > funding was used to generate this class.
>> >
>> > 2) There are several "#if 1/#else/#endif" sections in the code which
>> > indicates to me that perhaps this code is still in a debugging state and >>
the
>> > behavior may change once the correct behavior is figured out.
>> >
>> > 3) #ifdef ITK_USE_ORIENTED_IMAGE_DIRECTION  :  if this is not defined, does
>> > the itkOrientedImage behave like the itkImage?
>> >
>> > 4) When would you recommend using this class for a registration program
>> > intended to public distribution?
>> >
>> > ============
>> >
>> > On the surface, it seems that it takes care of some issues with registering
>> > images that have different image directions to start with.
>> >
>> > Thanks,
>> > Hans
>> >
>> >
>> >
>> >
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