[Viratdata] VIRAT Dataset clarifications

[Jim Keeting]

Thank you that is very helpful.

Please keep me informed if you find a way to download the dataset easily
these days.

Kind regards,

Jim

On Tue, 21 Sept 2021 at 21:32, Roddy Collins <roddy.collins at kitware.com>
wrote:

> Hi Jim--
>
> Responses inline.
>
> On Wed, Sep 15, 2021 at 8:11 AM Jim Keeting <jim.keeting at gmail.com> wrote:
>
>> 1. I saw VIRAT Video Dataset Release 2.0/VIRAT Ground Dataset/annotations/VIRAT_S_000003.viratdata.objects.txt
>> has objects of type "0" what does this refer to, as the documentation
>> suggests the objects types are 1-7?
>>
>>
> Having looked at the objects in question, they seem to be static boxes
> that attempt to mark out the background -- they roughly mark out the grass,
> asphalt, sidewalk, and building. My guess is that they were a preliminary
> attempt at representing background classes that never came to fruition and
> were not removed from the dataset before release.
>
>
>> 2. For a given event or frame, are all people always labelled in the
>> scene, or just a subselection relevant to the event? Was wondering if there
>> is any way to select frames where all people have been annotated.
>>
>
> The VIRAT ground camera data has been annotated twice: once in 2010 as
> part of the original CVPR paper, and again in 2017 for the IARPA DIVA
> program. In the original CVPR paper, moving objects were tracked, and
> associated with any of the VIRAT activities that occurred during motion.
> (In other words, they might be annotated as movers without being associated
> with other activities.) If they were stationary, they were not annotated.
> These are the annotations in the Release 2.0 directory.
>
> For the DIVA effort (on VIRAT data), persons and vehicles were tracked all
> the time, whether or not they were moving or stationary. These annotations
> are available at https://gitlab.kitware.com/viratdata/viratannotations .
> (Note that this annotation approach differs from the DIVA annotations on
> the MEVA data at mevadata.org, where we only annotated actors who were
> participating in defined DIVA events.)
>
>
>>
>> 3. To download the dataset I tried the MIDAS software and server with:
>> http://midas.kitware.com/api/rest URL but it rejected authentication
>> despite having an account. I can download via the website at
>> https://data.kitware.com/ but cannot find an easy way to download the
>> whole dataset as if one downloads the whole connection it results in the
>> connection terminating before the download is completed or a corrupted .7z
>> archive, whereas I can manually download them one-by-one but there are too
>> many items to download one by one.
>>
>>
> I believe this is due to the mechanisms ensuring downloaders have agreed
> to the ground camera data usage agreement. One potential workaround is to
> create and upload fewer-but-larger tarballs of the videos; I'll look into
> this and update when I have more information.
>
> I hope this helps; let us know if you have any other questions.
>
> Thanks
> -Roddy
>
> --
> Roddy Collins, PhD
> Principal Engineer, Kitware Inc.
> 1712 Route 9, Suite 300, Clifton Park, NY 12065
> (518) 881-4918  || roddy.collins at kitware.com
>
>
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