Use image meta data programme [$115]

[oparoz]

The gallery app should be able to add/edit/delete various fields linked to a media file.

Lots of the information is stored in XMP/IPTC/EXIF fields and this should be automatically imported, but a user should also be able to fill empty fields and add new ones.

This can then be used for:

• sorting by date taken as opposed to date uploaded
• sorting by colour (Exif data)
• sorting by size
• sorting by person (Exif data)
• virtual views. Date based albums, tags based albums, location based albums, etc Flat view - all images in current and sub-directories #95

Pre-requirements

• Collect EXIF/XMP/IPTC data (Create an app to manage the meta data stored in media files #550)

Programme

• Sort by "picture taken" date Use EXIF taken date as sorting date for photos [$200] #221
• Rotate pictures Let the user rotate pictures which support EXIF [$5] #236
• Add meta data description to the slideshow Add exif description to the slideshow #525
• Filter using meta data properties Filter content using meta data properties #531
• Edit meta data properties
• Sort by "face" using meta data Sort by "face" using meta data #551

Please add bounties to individual issues

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[oparoz]

@cbxk1xg - Do you have any experience with this?

[rhatguy]

Another useful piece of metadata would be face tagging. Being able to search for photos of a particular person or persons or even create virtual albums containing only a specific person is a huge help in a large photo collection. If a user has spent the significant amount of time it takes to tag all of their photos, being able to take advantage of those tags is huge.

[oparoz]

@rhatguy - That would be great, but I'm not aware of any free face tagging library we could use. Are you?

[rhatguy]

exiftool is able to read the data from the image as shown below via command line. I'm not terribly familiar with how to pull this type of data from within php's EXIF library. There are some guidelines for storing face detection data put together by the metadataworking group specifically in section 5.9 in the linked pdf below. Google Picasa has conformed to this standard and is able to search for faces and add the tags directly into the files metadata.

http://www.metadataworkinggroup.com/pdf/mwg_guidance.pdf

exiftool IMG_6420.JPG | egrep -i region

Region Applied To Dimensions W : 3456
Region Applied To Dimensions H : 5184
Region Applied To Dimensions Unit: pixel
Region Name : Travis Kelley
Region Type : Face
Region Area X : 0.531829
Region Area Y : 0.371238
Region Area W : 0.0983796
Region Area H : 0.0788966
Region Area Unit : normalized

[oparoz]

Thanks! :)
If it's stored in the exif data, we should be able to extract and use it.

[d3anp]

It would be excellent if the metadata was indexed and searchable. For example:

• show photos with a specifc camera
• show photos taken in Australia in 2014 of Person X

Please add and use metadata from the embedded EXIF. It allows for a truly portable photo collection.

[oparoz]

Moving comments implementation to #176

[oparoz]

So, good news, @patman15 is going to work on the first step towards having full meta-data support. Once this initial piece of work is in, it should be fairly simple to implement some of the features listed here.

We need designers to figure out the best way to design the controls. I'm thinking of using a ribbon interface which should give plenty of room for buttons for basic operations.

[Bugsbane]

What design help is needed on this? The addition of the tags framework in ownCloud 9 seems like the perfect time to revisit this.

[oparoz]

@Bugsbane - I've added a list of issues to the OP. Those are the ones needing designers.

Filtering via tags is in #532. The main problem affecting all filters though is the lack of a navigation sidebar #401

[Bugsbane]

So..... what exactly is it, that a designer could do to help with these listed issues? It's still very much unclear. I took a scan of all of the issues in the OP that had links to them, and I didn't see any request for designer help in any of them. So is the needed help... Wireframe mockups for potential UI's? Graphical elements for already decided UI's? New interface ideas? Something else entirely?

[oparoz]

In #525, we need designers to find a way to display a description which works in all cases (desktop/mobile, portrait/landscape).

In #221, we need to find a way to let the user know that exif data is available and that it can be used for date sorting. If we mix upload date and picture taken date, users will end up with images arranged in an unpredictable order.

For the navigation panel, I was thinking of re-using what is currently used in Files, making it a no-brainer for users to filter their collection.

If you have CSS/JS skills, you can try to fix #401. That way we can implement favourites and tags sooner. I'm happy to provide some leads.

[oparoz]

Moved the meta data app to #550. This issue is now purely about tracking the programme.

[oparoz]

Created "Sort by "face" using meta data" #551

[oparoz]

This issue was moved to nextcloud/gallery#26