A fingerprint display method and fingerprint display 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: 2020-05-08
CHANGCHUN INST OF OPTICS FINE MECHANICS & PHYSICS CHINESE ACAD OF SCI
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
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
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[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...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present application discloses a fingerprint display method and a fingerprint display system, wherein, the fingerprint display method uses the obtained black body radiation luminescent material to cover the fingerprint to be displayed on the carrier to be imaged, so that the black body radiation luminescent material on the surface of the fingerprint to be displayed can be Blackbody radiation is emitted when the infrared laser with preset power is irradiated, so that the fingerprint to be displayed on the irradiated part appears, and the method of scanning irradiation is adopted in the process of irradiating the fingerprint to be displayed, which avoids the background pattern on the carrier to be imaged. Long-term imaging reduces the influence of background patterns on fingerprint display and reduces the adverse effect of background fluorescence on fingerprint image acquisition, so that fingerprints to be displayed can be clearly displayed and processed, thereby providing the possibility to obtain clear and high-contrast fingerprint images.
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,...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
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