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Elog.io makes it easy to search for information about photographs you see while browsing.

About the Project

Elog.io is a good example of an open source and free software. The products itself is a toolset for web researches. It integrates with the browser and then, when the images are detected on a page, identifies images in the Elog.io database to find attribution information. Basically, it allows users to easily find an answer to the question: is this photograph I’m looking at openly licensed? If no, who holds the copyright?

The Solution

The solution is based on advanced perceptive hash algorithm to find visually similar images even if they were colored, resized or cropped. We were making a browser extension which would inject a script into a page and then find all images. Specifically, it scanned for images on the page and talked to an API to identify, annotate and mark each image with license and author details. It would tell the user whether this is a known image of a known author, or it has been found on the web. Logicify set up a team of a single person and technical advisory access to accomplish this project. The developer had to analyze a large sample of possible website designs and do extensive testing of the resulting extension to make sure the injected script would not interact with the target websites currently opened in a tab. The algorithm for calculating matches was developed on the server side. Our goal was to work reliably with the heterogeneous world of web pages to locate images perfectly.


The product was completed and released into Google Chrome store.