Fig. 1. Schematic block diagram of lifting motor for light source movement control

Fig. 2. Schematic diagram of experimental platform

Fig. 3. Flow chart of overall system design

Fig. 4. Diagram of six roles

Fig. 5. Flow chart of FS-SIFT algorithm

Fig. 6. Process of secondary generation Curvelet fusion algorithm

Fig. 7. Partial images of moving trace photography in vertical direction of light source

Fig. 8. Partial images of moving trace photography in horizontal direction of light source

Fig. 9. Photography process of sweat latent fingerprint of gray-white Matt ceramic tile

Fig. 10. Image index analysis in horizontal direction

Fig. 11. Color separation photography of potential fingerprints on surface of orange-red ceramic tiles

Fig. 12. Color separation photography of potential fingerprints on surface of light blue ceramic tiles

Fig. 13. Color separation photography of oil latent fingerprints on surface of light yellow cards

Fig. 14. Feature point extraction of traditional SIFT algorithm

Fig. 15. Feature point extraction of improved FS-SIFT algorithm

Fig. 16. Image registration with traditional SIFT algorithm and image registration with improved FS-SIFT algorithm

Fig. 17. Comparison of fusion trace images of secondary generation Curvelet algorithm