Search by images, including by altered forms of the images, can help in assessing of the images. The question here is: had anyone posted a form of the image? And the "Perceptual image analysis" extension can help to find out since when the images are online then.

* search by images even from private sites
* open-source tools for journalists
* part of perceptual image suite

Install

• License: MIT License
• Weekly downloads: 1
• Average daily users: 16
• Rating: 0/5 of 0 ratings
• Created: 2018-03-05 06:49:56
• Last updated: 2018-05-16 14:30:16
• Homepage: http://tools.quadet.com/
• Support site and email
• Orig: https://addons.mozilla.org/en-US/firefox/addon/perceptual-image-search/
• API: perceptual-image-search-extension@quadet.com