Fingerprint Input Imaging for Real-vs-Fake Detection

The patent divides the verification process into two independent stages: first verifying fingerprint pattern matching using reflected light image, then separately verifying living body authenticity using transmitted light image. This segmentation allows each verification stage to use optimized imaging methods, resolving the contradiction between device complexity and measurement precision by avoiding the need to combine both light types in a single complex comparison system.

The patent introduces an intermediary verification stage that processes reflected light and transmitted light images separately before combining their verification results. This intermediary approach allows independent optimization of each imaging modality while maintaining overall system simplicity, thereby improving measurement precision without significantly increasing device complexity.

The patent performs preliminary fingerprint pattern verification using reflected light image before proceeding to living body verification using transmitted light image. This preliminary action ensures that only valid fingerprint patterns undergo the more complex living body verification process, thereby maintaining ease of operation for clear cases while improving reliability through additional verification layers for ambiguous cases.

The patent implements a dynamic verification process that adapts the depth of verification based on the initial fingerprint pattern matching results. When pattern matching succeeds clearly, the system can operate with simpler verification; when results are ambiguous or forgery is suspected, the system dynamically engages the full transmitted light living body verification process, thus balancing ease of operation with reliability.