A Google Webmaster Help thread has one webmaster who is upset that many, about 4,000, of his images are being blocked by Google’s Image Search SafeSearch filter.
Gary Illyes from Google explained that although the images might not look visually offensive but the filenames and words on the page can also flag the image as offensive. He said, do a site command and add the word [naked] to the query and that shows that many of those images are returned for a type of nude keyword phrase.
The easy fix is to rename the filenames of the images to safe words and to remove any unsafe words from the context of the page.
Gary explained in the thread:
Forum discussion at Google Webmaster Help.
