[ITK-users] Creating a region to store LabelObjects

[Pol Monsó Purtí]

After tweaking here and there, I believe the problem was mine that I was
shifting the objects twice because it doesn't happen anymore.

The Shift problem remains, thought. Shifting doesn't update the labelobject
attributes, so, right now, I shift the pixels _and_ then shift
(get,offset,set) the boundingbox, given that those are the attributes that
I need.

Cheers,

Pol

2015-04-21 12:29 GMT+02:00 Pol Monsó Purtí <lluna.nova at gmail.com>:

> Hello all,
>
> related to a couple of conversations we've had here I've noticed a strange
> behaviour that is related to the LabelMap representation.
>
> I have two label objects
>
> bounding box1 ImageRegion (0x7fd381317888)
>
> Dimension: 3
>
> Index: [23, 40, 2]
>
> Size: [60, 71, 9]
>
>
> bounding box2 ImageRegion (0x7fd38131a328)
>
> Dimension: 3
>
> Index: [74, 18, 2]
>
> Size: [24, 39, 9]
>
>
> If I create a region of size [100, 120, 11] it should be able to store
> those two objects.
>
> However, (maybe) that is not the case because the objects are not drawn at
> slice 2 but on slice 5 when I write the output of
> LabelMapToLabelImageFilter. There is no exception thrown, thought.
>
> I've also noticed that using the Shift function of the LabelObject doesn't
> change the object's boundingBox, which leds me to think that each pixel has
> a shift somehow not related to the bounding box.
>
> I can provide a Minimum Working Example if needed.
>
> I've read the article journal, but I couldn't see the answer, may be
> related to 'storing the label objects as lines', which I don't completely
> understand what's the graphical representation of those lines.
>
> What is going on?
>
> Cheers,
>
> Pol
>
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