Hi,
Is it possible to determine for an existing hdf5 dataset if a specific chunk
has been allocated?
My situation is the following: I have a large two dimensional int32 dataset
representing an image, for which I want to create a number of downscaled
copies (gaussian image pyramid). Each copy is half of the size of the one
before.
Now, the base dataset might be set quite spasely, so only a small part
(~30%) of the area has actually been written to, the rest ist just the
default fill value. When computing the downscaled copies, I would like to
skip areas only containing the default value. Or, more precisely, copy only
chunks, that actually have been allocated. Is there a way to determine if a
chunk (maybe identified by an element position x,y) has been allocated?
Thanks,
Daniel
PS
A big thank-you to all HDF5 developers for this greate library!!
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