Display custom EXIF data from JPEG

Hi

I would like to create libraries using the WordPress built-in gallery and display certain EXIF data along with each image.

I’m using Darktable to tag JPEGs and export them. The tags are stored in an EXIF field called “Subject”. The tags are separated with a comma (,). Darktable does not allow me to store the tags in the “title” or “caption” fields.

How do I display the data from “Subject” along with each image in a gallery?

I’ve tried to use and modify the plugins Exif Caption and Exifography but they don’t include data from the “Subject” field. I’ve also tried to change wp-admin/includes/image.php to fetch the “Subject” field data and treat it as “title” or “caption” instead. I don’t include any information in the “title” or “caption” fields in my JPEGs.