How do search engines like Google view people taking images from Google image search? Is metadata contained in these images that might classify them as "unoriginal"?
If you go into the Advanced Search screen for Google Image search you will find a 'Usage Rights' option. This will allow you to search for images that are available to use and are not limited by copyrights. You should not use images on your site that are not labeled for reuse. You can save metadata with images that can contain copyright information, which Google could read to determine who the copyright holder is.
EXIF data is used to find the images by the data stored in it. Tineye is Search Engine that performs reverse image search which makes use of EXIF data.
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