Re: [Openexr-devel] List of all availabe attributes in an exr file

[Larry Gritz]

It is certainly possible to iterate over the full metadata of an OpenEXR file.

        Imf::Header *header = ...;
        for (Imf::Header::ConstIterator hit = header->begin();
             hit != header->end();  ++hit) {
            std::cout << "name = " << hit.name() 
                      << ", type = " << hit.attribute().typeName() << "\n";
        }


For a full example, look at this portion of the OpenImageIO code:
https://github.com/OpenImageIO/oiio/blob/master/src/openexr.imageio/exrinput.cpp
look at the loop beginning at line 530.




On Nov 19, 2013, at 12:48 AM, Blecher Wolf <address@hidden> wrote:

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> 
> Hi,
> 
> we are currently implementing OpenEXR as an internal exchange/storage format 
> for some processed medical images.
> Since we need to store a variety of metadata (realized by storing several 
> attributes) depending on the actual image type, we would like to query a list 
> of attributes present in the file.
> As far as I have seen, the implementation (version 2.0.1) does not provide a 
> method for this, so my idea was to store an additional attribute 
> (StringVector) which contains the available attributes and their static 
> typename.
> Any better ideas?
> 
> Cheers
> 
> Wolf

--
Larry Gritz
address@hidden