The image databases listed here are some of the largest, highest-quality image databases available. All have extensive coverage of visual materials relevant to multiple disciplines.
When you do a Google Search, you can filter your results to find images, videos, or text that you have permission to use. To do this, use an Advanced Search filter called "usage rights" that lets you know when you can use, share, or modify something you find online.
Note: Before reusing content, make sure that its license is legitimate and check the exact terms of reuse. For example, the license might require that you give credit to the image creator when you use the image. Google can't tell if the license label is legitimate, so we don't know if the content is lawfully licensed.
Usage rights help you find content that you can use above and beyond fair use. Site owners can use licenses to let you know if and how content on their sites can be reused.
The usage rights filter in Advanced Search shows you content either labeled with a Creative Commons or similar license, or is in the public domain. For images, the usage rights filter also shows you images labeled with the GNU Free Documentation license.
These search iengines search the web or multiple image databases.
Visual search engines search for images using image and visual matching technologies, rather than keywords, tags, or text.