Can Image File Names be Masked?

[Atlanta-SMO]

If we "mask" file names for our website but they are left their original name on the server, will Google notice this? Client wants to mask them in order to name them with keywords but not change on the actual server.

[LesleyPaone]

By masking are you talking about rewriting the url? If so, they will stay in the index. You can also send a canonical header with your image files too, Google will respect that as well.