[Insight-users] Continuous Index

[Xiang Hao]

Hi Luis,

Thank you so much, Luis. I will try it, and BTW, as I remember, there is a
problem about setPixel() and getPixel() method while I am using the
ContinuousIndex. It said it cannot find the corresponding method. Anyway, I
will try your method and try to make it work.

Thank you again,
Xiang

On Tue, Jun 30, 2009 at 10:29 AM, Luis Ibanez <luis.ibanez at kitware.com>wrote:

>
>
> Hi Xian,
>
> If you need sub-pixel locations for the points of the fibers,
> yes, it makes sense to use ContinuousIndex instead of
> Indexes for representing the location of fibers centers.
>
> That said, it may be preferable to use itk::Point<> since
> that will take into account also the pixel spacing, image
> origin, and image orientation, and you will be able to
> do things like overlapping a visualization of the fibers
> with the original image.
>
> A) If you need to convert Index to ContinousIndex you
>      can use the method:
>
>     Constructor
>
>      IndexType  index;
>      ContinuousIndexType  cindex( index );
>
> B) In order to convert Continuous index to Index you
>      can use the method CopyWithRound()
>
>     index.CopyWithRound( continousIndex )
>
> C) In order to convert an index into a physical point
>      and back you can use the image methods
>
>       TransformIndexToPhysicalPoint( index, point );
>       TransformPhysicalPointToIndex(point, index );
>
>
>
>   Regards,
>
>
>
>         Luis
>
>
>
>
> ----------------------------------------------------------------------------------------------
> On Sun, Jun 28, 2009 at 2:42 PM, Xiang Hao <haoxiang at yahoo.cn> wrote:
>
>> Hi,
>>
>> I am trying to write a tractography program.
>> Now I use discrete index:
>>
>> Dimension =3;
>> typedef int OutputPixelType;
>> typedef itk::Image< OutputPixelType, Dimension > OutputImageType;
>> OutputImageType::IndexType pixelIndex;
>>
>> So now the pixelIndex is discrete index and I want to change it to
>> continuous index. I know there is an ContinuousIndex class in ITK. I wonder
>> whether I should use this class and how to use it in order to change the
>> index to continuous index.
>>
>>
>> --
>> Cheers,
>> Xiang
>>
>>
>> --
>> Cheers,
>> Xiang
>>
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>


-- 
Cheers,
Xiang
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