Objective: To investigate the application method and processing effect of Photoshop software in difficult
fingerprint image processing, and provides a software processing method for fingerprint image enhancement
technology. Methods: In Photoshop CC 2017 software, the difficult fingerprint image is optimized by adjusting
the brightness/contrast/curve/color scale, channel difference calculation, high-contrast retention and sharpening,
the overlapping fingerprint and fuzzy fingerprint are identified, and the fingerprint image on monochrome
background and complex background is enhanced. Results: Photoshop software can identify difficult fingerprints
well. The processed fingerprint features are obvious, and the recognition degree of monochromatic background
fingerprint image is high. Conclusion: Photoshop software can improve the evidence characteristics of fingerprint
image, its effect is obvious, the result is accurate, can be applied to the identification of difficult fingerprint.