Save HDF image in LabVIEW

[pegli]

Hi,

would like to store some image data from a 2D-Picture control to an HDF file using the marvelous Live HDF5 package. However, I was not able to save the data in such a way that HDFView recognizes them as "Image" datatype. I tried writing the attributes CLASS, IMAGE_VERSION, IMAGE_SUBCLASS etc along the 2D array of data but still it is only considered as a table in HDFView. How can I set the data type to be "Image"?

Thanks a lot

Peter

[Bob_Schor]

The Picture data is a 2D array of something, right?  Simply "wrap" it in whatever the HDF5 format requires (or hand it to a routine that will do this wrapping for you) and you'll be done.  If you do a Web search for HDF5 LabVIEW, you might find some examples that purport to do this wrapping ...

Bob Schor

[Darin.K]

I am not familiar with the HDF5 package you are using since I rolled my own a long time ago, but it does work with LV images pretty easily.  As long Live HDF5 includes both hdf5.dll and hdf5-hl.dll then just find the wrappers for the following functions.

Otherwise post your attempt at an HDF5 file and I will try to find what is missing.  You'll probably have to zip it.

[pegli]

Thanks a lot. I tried to store the data as you suggested but the H5IMmake_... function always returns the -1 error. Attached you find my VI and the created hdf5 file. Any clue what I'm doing wrong?

Peter

[Darin.K]

My HDF5 code is in LV15, please save your VI for that version.

Also, post one of the files that HDFView shows as a table.

[pegli]

I attached the LabVIEW-VI saved for LV15. Might it be that you are using an other version of the hdf5 dll set?

Peter

[Darin.K · Accepted solution]

As I suspected, just a couple of quick datatype tweaks on the CLFN, the width and height are U64 and the image data is [U8].

[pegli]

Darin, thank you so much for the fixed VI. It works perfectly!

Now, I changed the VI in such a way that it integrates with the file open/close stuff from Live HDF5 by UPVI and attached it to this post. Might be, that somebody wants to use it in conjunction with this specific HDF5 package as I do.

Peter