I've noticed that Google SafeSearch often filters images that should not be filtered - this is especially true since the "off - moderate - strict" options were removed, and replaced with a simple "on/off" switch. Since this change was implemented, I've noticed that many inoffensive images have been filtered. Is there any way to report non-offensive images that are filtered by SafeSearch (so that these false positives can be resolved)?
Use the Google Feedback tool as shown here and report to Google regarding the inoffensive image being filtered. I believe there is a mechanism on their side to check if an image is being filtered by SafeSearch.