I'm... I was a student Faculty of Information Technology of Czech Technical University in Prague. This web application is based on my master thesis from 2017.
What images are processed by this application? Currenly only spherical panoramas found on Flickr. Another requirement is selected Creative Commons License. This is the biggest limitation, but I don't want to be in a situation of "stealing" photos. I'm not a lawyer and don't have much time to get known all needed law.
Photos are automatically found using text search and some magical words as "spherical". Every photo is verified (if it's a spherical panorama) and analyzed (both text and image). Results are provided by this system.