Fingerprint showing method and fingerprint showing system
A fingerprint and to-be-displayed technology, applied in the field of infrared imaging, can solve the problems of difficult fingerprint display, poor application scope and effect, and difficulty in obtaining high-contrast fingerprint images, achieve clear display processing, avoid long-term imaging, reduce adverse effects
Inactive Publication Date: 2018-02-16
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
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However, due to the influence of background fluorescence, the applicability and effect of many methods using conventional ultraviolet excitation fluorescence technology to visualize fingerprints are usually not good. Against the background, it is difficult to use conventional fingerprint display methods to clearly display fingerprints, and it is also difficult to obtain clear and high-contrast fingerprint images
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[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0046] The embodiment of the present application provides a fingerprint visualization method, such as figure 1 As shown, it is realized based on infrared excitation broadband black body radiation luminescent material, and the fingerprint display method includes:
[0047] S101: Obtain a blackbody radioluminescent material, the blackbody radioluminescent material is a rare earth oxide material with a preset cation percentage of cations, and the preset cations ar...
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The application discloses a fingerprint showing method and a fingerprint showing system. According to the fingerprint showing method, a to-be-displayed fingerprint on a to-be-imaged carrier is coveredby using an obtained black-body radiation luminescent material, so that the black-body radiation luminescent material on the surface of the to-be-displayed fingerprint is able to emit black-body radiation on infrared laser radiation at a preset power and thus the radiated to-be-displayed fingerprint is shown. Because scanning radiation method is used during the radiation process of the to-be-displayed fingerprint, long-time imaging of a background pattern on the to-be-imaged carrier is avoided, the influence on fingerprint showing by the background pattern is reduced, and the adverse effect on obtaining a fingerprint image by background fluorescence is reduced, so that the to-be-displayed fingerprint is displayed clearly and thus the possibility is provided for obtaining a clear fingerprint image with a high contrast ratio.
Description
technical field [0001] The present application relates to the technical field of infrared imaging, and more specifically, to a fingerprint display method and a fingerprint display system. Background technique [0002] Latent fingerprints refer to hard-to-observe fingerprints attached to the surface of various carriers, and latent fingerprint objects are carriers that carry latent fingerprints, such as bank cards, glass, door handles, keyboards, water cups and other carriers. The collection of latent fingerprints has important applications in the fields of investigation and escape. [0003] However, due to the diversity and complexity of latent fingerprint objects, it is often necessary to use luminescent materials to enhance the appearance of fingerprints. However, due to the influence of background fluorescence, the scope and effect of many methods using conventional UV-excited fluorescence techniques to visualize fingerprints are usually not good. Against the background,...
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IPC IPC(8): G06K9/00C09K11/77
CPCC09K11/77G06V40/1318
Inventor 郑长彬邵俊峰王春锐王化龙王挺峰曹立华
Owner CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI