I tried: 1. Mirror reflection. 2. Apply new contrast, saturation and different filters. 3. Trim and rotate in 1-2 pixels. 4. Apply a new image layer with 99-98% transparency. 5. Change EXIF - title, author, description, GPS coordinates. But Pinterest shows similar images that were the source of my creations still. However, I know for sure that some people have achieved success in this matter and their images Pinterest considers unique and ranks higher.