[Insight-users] Calculation of the distance between the 2 farthest voxels of an image

[Neil Panjwani]

You can brute force and compute the distance between every white pixel, but
its not that efficient. See the attached file.

On Sun, Jun 12, 2011 at 9:58 AM, Pedro Névoa <pedronevoa at gmail.com> wrote:

> Hi,
>
> I forgot one detail. Not the distance between any voxels, but the distance
> between the 2 white (255) farthest voxels on a black (0) background!
>
> Thank you.
>
> Regards,
>
>
> 2011/6/12 Terry Yoo <tyoo at mail.nih.gov>
>
>>
>> Pedro:
>>
>> x^2 + y^2 + z^2 = d^2
>>
>> Simply:  The farthest distance is from one corner to the opposite corner
>> of a rectangular volume.
>>
>> max-distance = Sqrt((x-max * x-max) + (y-max * y-max) + (z-max * z-max))
>>
>> Or am I missing something, Pedro?  Were you asking something else?
>>
>> -Terry
>>
>> Terry S. Yoo, PhD
>> Office of High Performance Computing and Communications
>> National Library of Medicine
>> National Institutes of Health
>> tyoo at mail.nih.gov
>>
>>
>>
>> On Jun 11, 2011, at 4:54 PM, Pedro Névoa wrote:
>>
>> > Hello,
>> >
>> > Does anyone know a method to calculate the distance between the 2
>> farthest voxels of an image?
>> >
>> > Thank you.
>> >
>> > Regards,
>> >
>> > --
>> > Pedro Névoa
>> >
>> > <ATT00001..txt>
>>
>>
>
>
> --
> Pedro Névoa
>
>
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