[vtkusers] Annotation using vtk and Qt

[Prathamesh Kulkarni]

Sorry for posting too many emails. I have to find a solution to all my
problems mentioned so fat (or at least know if it has one!)

Now I am wondering how to obtain Image co-ordinates from the
SeedWidget. Currently, I can only obtain the view co-ordinates
(I know because they change when I zoom in and out). Is there any
method to convert them to image co-ordinates?

Any help would be highly appreciated.

Thanks,
Prathamesh

On Wed, Jun 23, 2010 at 2:55 PM, Prathamesh Kulkarni
<prathameshmkulkarni at gmail.com> wrote:
> Also, I as I go on marking points for any layer, I need to fit a
> spline/line connecting them and show it on the image to verify if the
> annotation is close enough to the layer boundary. I tried using the
> example at VTK/Examples/Widgets/ContourWidget but this does not give
> me the pixel co-ordinates.
>
> On Wed, Jun 23, 2010 at 2:28 PM, Prathamesh Kulkarni
> <prathameshmkulkarni at gmail.com> wrote:
>> That's cool, I saw the demo for vtkSeedWidget. That will pretty much
>> work for me.
>>
>> Since my application involves marking pixels on different layers of an
>> image, I need to allow the user (using a push button) to save and
>> clear all the points and mark new ones for a different layer.
>>
>> Will anyone please point me to the right classes which will allow me
>> to add such kind of user interaction?
>>
>> If I don't find an easy way to do this, I might have to switch to Matlab :(
>>
>> Prathamesh
>>
>> On Wed, Jun 23, 2010 at 11:35 AM, Jothy <jothybasu at gmail.com> wrote:
>>> If you want to mark point on image then you should use vtkSeedWidget
>>>
>>> If you want to display text then you should use
>>> vtkTextWidget/vtkCaptionwidget
>>>
>>> Jothy
>>>
>>>
>>> On Wed, Jun 23, 2010 at 5:32 PM, Prathamesh Kulkarni
>>> <prathameshmkulkarni at gmail.com> wrote:
>>>>
>>>> Thanks for the help. I will have a look at them. So if you mean to say
>>>> that these 2 classes will suffice for marking points on a vtkImage and
>>>> saving its image co-ordinates to a file (I also want to provide
>>>> options to user) ? Do I need to do anything with Qt for this?
>>>>
>>>> On Wed, Jun 23, 2010 at 11:10 AM, Jothy <jothybasu at gmail.com> wrote:
>>>> > I think you should use vtkCaptionWidget or vtkTextWidget.
>>>> >
>>>> > Jothy
>>>> >
>>>> > On Wed, Jun 23, 2010 at 5:00 PM, Prathamesh Kulkarni
>>>> > <prathameshmkulkarni at gmail.com> wrote:
>>>> >>
>>>> >> Hello all,
>>>> >>
>>>> >>
>>>> >> I want to develop an application in which I can annotate points on
>>>> >> medical images and save their image co-ordinates in my class. Also, I
>>>> >> want to provide options like deleting previous point and adding more
>>>> >> points while the points are being marked by the user.
>>>> >>
>>>> >> I am new to vtk and have never tasted Qt.
>>>> >>
>>>> >> Could someone please guide me by giving me a step by step procedure
>>>> >> required to do this?
>>>> >>
>>>> >> Thanks,
>>>> >> Prathamesh
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>>>
>>>
>>
>