You didn't mention if it was node or static file.

The reason I ask is because, as you have mentioned, you can call scripts 
from Bob. So I was just thinking that it might be possible to call a script 
on the fly that would extract the data as needed. But that wouldn't be 
possible from a stand-alone TW file.

There is a plugin for FF that presents EXIF data.

-- Mark

On Wednesday, October 17, 2018 at 2:19:05 PM UTC-7, @TiddlyTweeter wrote:
>
> In the TW nothing at all for the images:-) They are presented by simply 
> generating a random number in the range 0000 and 3999. All the files are 
> numbered like "fw_1234.jpg" and presented one at a time. It works for that 
> app as they are simply a vast set of images so no persistent tiddlers are 
> needed. I do intend to add ability to add favourites  eventually, but that 
> would simply be a list of pointers to external files. I aim to use EXIF 
> without creating 4000 Tiddlers or any external lists. If I wanted I could 
> do that already simply extracting the EXIF to spreadsheet and importing 
> them.Its that I'm trying to avoid. I'm hoping, if I can figure it out, how 
> to use embedded EXIF data in images dynamically only when showing the 
> image. It won't persist beyond that as it would not be needed.
>
> Hope this is clear!
>
> Josiah
>
> On Wednesday, 17 October 2018 22:43:57 UTC+2, Mark S. wrote:
>>
>> Until someone with the answer shows up, a few questions.
>>
>> What information *are *you storing in the TW (if not EXIF, then what?) ?
>>
>> Is this being served up via Bob, or single-file?
>>
>> I'm sure there are tools for extracting and making files from EXIF data 
>> (DigiKam will make sidecars, for instance). So if you had 4000 exif files, 
>> it should be possible to make 4000 tid files that could then be either 
>> combined or linked to existing image tiddlers.
>>
>> -- Mark
>>
>> On Wednesday, October 17, 2018 at 10:53:46 AM UTC-7, @TiddlyTweeter wrote:
>>>
>>> I have a long term project to showcase 4000 images of paintings made by 
>>> children of Bonfire Night (a great UK festival held on the 5th of November).
>>>
>>> I already figured out how to show them without them ever having Tiddlers 
>>> in TW (too many to do one by one). Showing is done using numbers generated 
>>> between 0 & 3999 rather than calling on individual Tiddlers. It works. 
>>>
>>> The remaining issue is meta data that is held in the image files as EXIF 
>>> data. And that is my concern here. 
>>>
>>> I'm wondering if anyone knows of a way to extract EXIF data from image 
>>> files using TW? 
>>>
>>> The great advantage of EXIF is that every image caries with it its own 
>>> data record (like: description, date shot, and any details I add) so there 
>>> is no need for a second external set of documentation or database. Being 
>>> able to access EXIF data in images loaded into TW would keep it very 
>>> lightweight and efficient for large galleries of images--whilst providing 
>>> useful displayable information.
>>>
>>> This is just an initial query to see if anyone here may have 
>>> understanding of what I am getting at.
>>>
>>> Any tips appreciated.
>>>
>>> Best wishes
>>> Josiah
>>>
>>

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