[Insight-users] Rescale label image

Dženan Zukić dzenanz at gmail.com
Wed Jun 13 04:25:54 EDT 2012


RelabelComponentImageFilter did not have option to not sort the labels by
object size. I have added the option to not sort it. I am in a hurry now so
I will push it to gerrit later.

On Tue, Jun 12, 2012 at 9:06 PM, Dženan Zukić <dzenanz at gmail.com> wrote:

> Of course, when I get back to University tomorrow. Here, it's 9pm :D
>
> On Tue, Jun 12, 2012 at 9:05 PM, Bill Lorensen <bill.lorensen at gmail.com>wrote:
>
>> Just try it
>>
>> On Tue, Jun 12, 2012 at 3:04 PM, Dženan Zukić <dzenanz at gmail.com> wrote:
>> > I have also read that documentation, and looked at the methods of the
>> class
>> > in docs. However, I could not find anything which deals with sorting.
>> >
>> > On Tue, Jun 12, 2012 at 6:14 PM, Bill Lorensen <bill.lorensen at gmail.com
>> >
>> > wrote:
>> >>
>> >> /**
>> >>  * \class RelabelComponentImageFilter
>> >>  * \brief Relabel the components in an image such that consecutive
>> >> labels are used.
>> >>  *
>> >>  * RelabelComponentImageFilter remaps the labels associated with the
>> >>  * objects in an image (as from the output of
>> >>  * ConnectedComponentImageFilter) such that the label numbers are
>> >>  * consecutive with no gaps between the label numbers used.  By
>> >>  * default, the relabeling will also sort the labels based on the size
>> >>  * of the object: the largest object will have label #1, the second
>> >>  * largest will have label #2, etc.
>> >>  *
>> >>  * Label #0 is assumed to be background is left unaltered by the
>> >>  * relabeling.
>> >> */
>> >>
>> >> On Tue, Jun 12, 2012 at 11:43 AM, Dženan Zukić <dzenanz at gmail.com>
>> wrote:
>> >> > I have an image containing labeled objects. The number of objects is
>> >> > about
>> >> > 10. However object labels are not consecutive (1,2,3...) as I would
>> like
>> >> > them to be, but are scaled to 255.
>> >> >
>> >> > In case of 2 objects, labels would be 0(background), 127, 255.
>> >> >
>> >> > However ShiftScaleImageFilter does not seem a safe way to switch
>> back.
>> >> > There
>> >> > is  ChangeLabelImageFilter, but it sorts the labels by object size.
>> Is
>> >> > there
>> >> > a parameter to make this filter not sort labels? If not, what is the
>> >> > easiest
>> >> > way to accomplish this?
>> >> >
>> >> >
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>> >>
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