Google Image Search
Google allows you to limit your search to large image files, images with a creative commons license and other criteria. Remember that the Internet is not monolingual, so that using search terms in a variety of languages will increase your results. If you have installed protection against viruses and malware on your PC, you needn't worry about contamination from downloading or copying images from google.
If you need help finding any digital images, the Art & Design Librarian is happy to assist you; contact link is in proflie on the right.
East Asian Art Images
You can use the snipping tool from Microsoft Office to capture any image you find on the Internet or have in a document or file, even if right clicking to copy is disabled.