[ome-users] .dv large time series file open bug?

[Daniel White]

I will ask!

Best

D

On 5 Oct 2016 18:08, "Sebastien Besson (Staff)" <s.besson at dundee.ac.uk>
wrote:

> Hi Dan,
>
> Thanks for following up on this thread. Unfortunately we do not have any
> recent specification
> file documenting this new Deltavision format. Without knowing the
> specifics, we implemented
> a minimal workaround in Bio-Formats 5.2.3 released today [1] which should
> hopefully deliver
> support for these large time-series files to the community, including your
> customers.
>
> In the mid-term, updating the Bio-Formats reader to use the exact format
> specification is
> certainly a more robust and maintainable approach as we have seen with
> other proprietary file
> formats. In addition to the storage of the number of timepoints in the
> header, is there any other
> major change in the specification that would affect Bio-Formats? Would you
> be allowed to share
> part or all of this new Deltavision format specification?
>
> Best,
> Sébastien
>
> [1] https://www.openmicroscopy.org/community/viewtopic.php?f=11&t=8133
>
>
> On 5 Oct 2016, at 09:13, Daniel White <dan at chalkie.org.uk> wrote:
>
> Hi Bio-formats  folks,
>
>
> here is some more info about opening large time series .dv files, from
> the software engineers at the DeltaVision factory.
>
> Does the latest .dv file format spec doc you have include the below info?
>
> If not, let me know.
>
>
> cheers
>
>
> Dan
>
>
>
> #################################################
>
> There are two types of .dv formats: the old one, and the new one that we
> started using in 2006 which allows for much larger numbers of time-points.
> From our software team, here’s the logic needed to determine the number of
> time-points in the file from the header of any .dv image file.  The
> complexity comes from backwards compatibility, but it should be
> straightforward enough!
>
>
>
> determine the image file type by reading the 16-bit integer at header byte
> 160
>
>
>
> if the image file type is >= 100 then
>
> determine the number of time-points from the 32-bit integer at header byte
> 852
>
>
>
> else if the image file type is < 100 then
>
> determine the number of time-points from the 16-bit integer at header byte
> 180
>
>
>
> If you could pass this along to the bioformats group, that would be great.
>
>
> Let me know if you/they need any more information.
>
>
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