[ITK] [ITK-users] Conversion of itk::Image to other formats

[Lambert Zijp]

Hi Sarthak,
There is no file I/O involved. It is about conversion in memory. In my
original post, MyFormat is a struct containing things like pixeltype and
number of dimensions and a couple of pointers to the pixels, the sizes of
the dimensions, and the coordinates. Conversion *from* MyFormat to itk, I
got more or less working. Now I want to convert from itk *to* MyFormat. A
function prototype is needed...

Greetings,
Lambert

On Thu, Mar 10, 2016 at 5:02 PM, Scapegoat Sarthak <
scapegoat.sarthak at gmail.com> wrote:

> Hi Lambert,
>
> What you could do is to make a function what just takes in a file name as
> input and call the templated ITK function inside as an inline function.
> There is no way I know to do I/O in ITK without using templates.
>
> Best,
> Sarthak
>
>
> On 10 March 2016 at 10:55, Lambert Zijp <ljzijp at gmail.com> wrote:
>
>> Hi Scapegoat,
>> Thank you for responding. What would the function prototype then be (of
>> function that accepts any itk image. I mean, the syntax, preferably not
>> templated)?
>> Because I deal mostly with 3D or 4D signed short pixels (medical images),
>> I keep them as they are: half the memory consumption and easier histogram
>> computations.
>>
>> Greetings,
>> Lambert
>>
>> On Thu, Mar 10, 2016 at 4:35 PM, Scapegoat Sarthak <
>> scapegoat.sarthak at gmail.com> wrote:
>>
>>> I would advice you to perform a check on the image dimensions (2 or 3)
>>> and keep the pixel type as float throughout. In any case you will be doing
>>> computation so the extra memory is going to be helpful.
>>>
>>>
>>> On 10 March 2016 at 10:28, Matt McCormick <matt.mccormick at kitware.com>
>>> wrote:
>>>
>>>> Hi Lambert,
>>>>
>>>> This example shows how to read in an unknown image type. It
>>>> demonstrates how to go between run-time type specification and the
>>>> compile-image type specification of ITK.
>>>>
>>>>
>>>> http://itk.org/ITKExamples/src/IO/ImageBase/ReadUnknownImageType/Documentation.html
>>>>
>>>> This approach could be used for your problem.
>>>>
>>>> HTH,
>>>> Matt
>>>>
>>>> On Thu, Mar 10, 2016 at 9:56 AM, Lambert Zijp <ljzijp at gmail.com> wrote:
>>>> > Dear itk users,
>>>> > I'm new to itk and also not very proficient in C++...
>>>> > I want to try some deformable registration methods implemented in
>>>> itk, and
>>>> > need to convert my own format of images and volumes to itk, and back.
>>>> > For conversion to itk, I use 'ImportImageFilter', because I do not
>>>> want to
>>>> > make a copy of the pixels/voxels.
>>>> > Converting itk images and volumes back to my own format, is giving me
>>>> a
>>>> > headache; I'm confused about 'Image', SmartPointer and ConstPointer
>>>> and
>>>> > template stuff.
>>>> > Could you get me started by suggesting me a function prototype?
>>>> >
>>>> > Something like:
>>>> > int ItkToMyFormat(MyFormat** ppMyFormat, itk::Image* pItkImage);
>>>> >
>>>> > The ItkImage can be any pixeltype, any dimension, and vector images
>>>> should
>>>> > also be accepted by the conversion routine. In that conversion
>>>> function, and
>>>> > need to be able to put a switch on pixeltype and number of dimensions.
>>>> >
>>>> > Greetings,
>>>> > Lambert
>>>> >
>>>> > _____________________________________
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>>>> Visit other Kitware open-source projects at
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>>>> Kitware offers ITK Training Courses, for more information visit:
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>>>> Please keep messages on-topic and check the ITK FAQ at:
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>>>
>>>
>>
>
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