[Insight-users] Confused about pixel Spacing

[Kishore Mosaliganti]

Once you choose a certain spacing, remember to consistently use that
in all the subsequent processing filter settings such as sigma of
Gaussian etc. In most filters, you will have the option
SetUseImageSpacingOn() or Off() that you should also use. The output
at any intermediate stage will also have the same units.

It is better to use the 2.83 micrometer value since the other value
seems very cumbersome to handle.

Kishore

On Wed, Nov 11, 2009 at 1:47 PM, Cory Quammen <cquammen at cs.unc.edu> wrote:
> Auron,
>
> The units you choose for pixel spacing (meters or micrometers) do not
> matter. It only matters that you are consistent in what unit you use
> to set the spacing for both the fixed and moving images.
>
> Hope that helps,
> Cory
>
> On Wed, Nov 11, 2009 at 12:58 PM, Auron Ford Huton <auron at hotmail.es> wrote:
>> Hello ITK!!
>>
>> I am working in microscopy image registration and I doubt how to express my
>> pixel spacing (I think all my problems came from that...). I know that my
>> pixel spacing is about 2.83 micrometres (0.00283mm).
>> I am using .raw image so I used a .mhd to acces them... What of the
>> following lines I should use to set my spacing?
>>
>> ElementSpacing = 0.00283 0.00283
>>
>> or
>>
>> ElementSpacing = 2.83 2.83
>>
>>
>> Thank you in advance.
>>
>> Auron.
>>
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>
>
>
> --
> Cory Quammen
> Center for Computer Integrated Systems for Microscopy and Manipulation (CISMM)
> Department of Computer Science
> University of North Carolina at Chapel Hill
> http://www.cs.unc.edu/~cquammen
> _____________________________________
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>
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