[wp-hackers] Preserving EXIF data for image resizes

Marko Heijnen mailing at markoheijnen.nl
Mon Mar 25 16:55:28 UTC 2013

Hey Philip,

That plugin is obsolete since it's in core right now. That what Mike and also I presented about. You should check if your hosting company has ImageMagick (imagick) or GraphicsMagick (gmagick) installed.
Those two libraries will preserve the information. For Gmagick you do still need to use a plugin.

You can build a plugin for GD that restores the EXIF information to resized images. I'm pretty sure that can be done. It still one of those things on my list on how easy that is and if it can be in core or not.

Also if you aren't running on a VPS you can even recommend that. I would do so since you can then easily install gmagick and you will have lots of diskspace for the photos.


Op 25 mrt. 2013, om 17:28 heeft Philip Downer <philip at manifestbozeman.com> het volgende geschreven:

> Hi Hackers,
> I've followed this list for quite some time, and gleaned a lot of helpful information from each of your posts. Today, I'm running into an issue developing a site/theme for a photographer. Because he is selling stock photography to national publications, he is particularly worried about issues related to orphaned works... Basically, copyrighted material whose source cannot be easily identified. We require that each image on his site, regardless of size, contain the original EXIF data from the uploaded image.
> It doesn't appear the WordPress (and many other CMS's) preserve EXIF metadata when images are resized. My question is why not? Is this due to the image libraries that are used, or are there other issues that would result in a  benefit from stripping this data from the image? I do realize that EXIF data is preserved on the original upload and available via the wp_get_attachment_metadata function.
> I'm considering putting together a plugin that handles this, but want to first investigate the reasoning behind this functionality and get input from others before proceeding.
> I've also found a plugin that, while I've not tested fully, claims to handle this. http://www.tuchesaufntish.com/2011/05/27/preserving-metadata-in-images-uploaded-to-wordpress-sites/
> My somewhat limited knowledge of the image processing functionality of WordPress seems to indicated that WP is moving away from using any specific, dedicated library (like GD or ImageMagick) and instead relying on abstraction to determine what capabilities/libraries exist on the host. (See Mike Schroder's presentation on the WP_Image_Editor class http://wordpress.tv/2013/02/13/mike-schroder-image-manipulation-in-wordpress-3-5/ )
> Any advice, suggestions or snide remarks as I move forward will be appreciated. :-)
> Philip Downer
> Office: (406) 585-9406
> Cell: (406) 599-0222
> Skype: manifestphil
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