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Ever wondered how Google images filter the search results according to their license types. This feature is very much helpful for people looking for free images that are without any copyright issues. There is no one word parameter to label image license but you can achieve this with RDFa markup.
The simplest way to label image license types is using the below described code snippets.
Note: Make sure that the image for which you are trying to label license belongs to you. Don’t license other’s work!
Now let’s take a look at the different license types and their specific codes.
In the below code snippets make sure to replace the placeholder “Image URL” text with actual image url.
Reuse with Modification Allowed
This license allows the user to remix, tweak and build upon your work even for commercial use as long as they credit you. It is often referred as open source software license.
<!--Attribution ShareAlike--> <div about="Image URL"> <img src="Image URL"> <a rel="license" href="http://creativecommons.org/licenses/by-sa/4.0">Creative Commons Attribution-Share Alike 4.0</a></div>
Non-Commercial Reuse With Modifications
Allows user to use your image for non commercial use with modification as long as they are credited properly.
<!--Attribution-NonCommercial-ShareAlike --> <div about="Image URL"> <img src="Image URL"> <a rel="license" href="http://creativecommons.org/licenses/by-nc-sa/4.0">Attribution-NonCommercial-ShareAlike</a> </div>
Reuse without modifications (Commercial Use Allowed)
This license allows users to share your images without tweaking/modifying as long as it is credited to you.
<!--Attribution-NoDerivs--> <div about="Image URL"> <img src="Image URL"> <a rel="license" href="http://creativecommons.org/licenses/by-nd/4.0">Attribution-NoDerivs</a> </div>
Reuse without modifications (Non Commercial Use Only)
Out of the four licenses discussed above, this one is the most restrictive. It restricts users to use your images for commercial use. It also restricts user from modifying your work and also requires them to properly credit you.
<!--Attribution-NonCommercial-NoDerivs --> <div about="Image URL"> <img src="Image URL"> <a rel="license" href="http://creativecommons.org/licenses/by-nc-nd/4.0">Attribution-NonCommercial-NoDerivs </a> </div>
Alternatively, you can add the image rights details within the image metadata and Google recommends doing this as it helps the license details to stay within the image. Read this article to learn how you can add image license with IPTC metadata using Adobe Lightroom.