### Needed ImageJ (from http://rsb.info.nih.gov/ij/) Working scanner (can be hard) ### Scanner Settings Set to Grayscale. Set to 600 ppi. Set to wtb points. Set to Custom ~130,255. Set Preferences -> Scan Material -> Positive. Set Preferences -> More -> Scan Quality -> Quality. Set Preferences -> More -> Interpolation -> Speed. ### Image J Go to Analyze -> Set Scale. Over there change: Distance in Pixels -> 600 Known Distance -> 25.4 Pixel Aspect Ratio -> 1 Unit of Length -> mm