[ITK Community] Image buffer pointer

[Luis Ibanez]

Gib

The itkImportImageFilter

http://www.itk.org/Wiki/ITK/Examples/IO/ImportImageFilter

Might be what you are looking for.

Hope this helps

   Luis
 On Mar 17, 2014 12:24 AM, "Gib Bogle" <g.bogle at auckland.ac.nz> wrote:

>  Hi,
>
> I am doing manipulations on images by directly accessing the image
> buffer.  When I want to create a new image I currently employ a rather
> crude method.  I allocate a buffer of the right size, create the image in
> the buffer, then because I do not know how to make itk::Image use this
> buffer address I allocate the image buffer and copy from my buffer to the
> new image buffer:
>
>          unsigned char *p_u8;
>
>     typedef itk::Image<unsigned char,3> ImageType_u8;
>
>     ImageType_u8::Pointer im_u8 = ImageType_u8::New();
>
>     ImageType_u8::SizeType imsize;
>
>     ImageType_u8::IndexType imstart;
>
>     ImageType_u8::RegionType imregion;
>
>     imsize[0] = width;
>
>     imsize[1] = height;
>
>     imsize[2] = depth;
>
>     imstart[0] = 0;
>
>     imstart[1] = 0;
>
>     imstart[2] = 0;
>
>     imregion.SetSize(imsize);
>
>     imregion.SetIndex(imstart);
>
>     im_u8->SetRegions(imregion);
>
>     im_u8->Allocate();
>
>     p_u8 = (unsigned char *)(im_u8->GetBufferPointer());
>
>     // copy buffer to p_u8
>
>     memcpy(p_u8,buffer,(size_t)(width*height*depth));
>
>
> This works but is obviously inefficient.  Previously the inefficiency didn't bother me,
> but now that I'm working with big tiff images I am running out of memory.  Is there a way to create an Image
> and make it use a buffer that has already been allocated?
>
> Thanks
> Gib
>
>
>
> _______________________________________________
> Community mailing list
> Community at itk.org
> http://public.kitware.com/cgi-bin/mailman/listinfo/community
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://public.kitware.com/pipermail/community/attachments/20140317/e0d543f9/attachment-0002.html>