No, Google will not save the images you post to ThrillPiXx. The ThrillPiXx application utilizes Google's Cloud Vision API (application programming interface) for our image detection feature, but images scanned through this feature are not stored by Google.
For more information about content posted in the application, please refer to the ThrillPiXx Terms and Conditions user agreement, which can be found in the ThrillPiXx help center.