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Living body fingerprint collecting method and apparatus

A collection device and collection method technology, which is applied to instruments, character and pattern recognition, computer parts, etc., can solve problems such as image resolution reduction, and achieve the effects of avoiding high prices, eliminating the interference of smudges, and reducing product costs.

Active Publication Date: 2007-04-18
北京海鑫科金高科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a green light source is used, only the green pixels are sensitive, and the image resolution is reduced to half of the sensor resolution; when a red or blue light source is used, only the red or blue pixels are sensitive, and the image resolution is reduced to the sensor resolution a quarter of

Method used

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  • Living body fingerprint collecting method and apparatus
  • Living body fingerprint collecting method and apparatus

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Embodiment 1

[0026] A kind of collection method of living finger and palm print, referring to Fig. 2, uses a collection device that is made of prism 2, light source 1, lens assembly 4, image sensor 5, and its steps are:

[0027] The light source is an infrared light source, so that the infrared light source emits a monochromatic collection light beam with a wavelength range of 700nm to 1100nm; the infrared light source can use GL4910 infrared light-emitting tube products to form an array; the collection light beam refers to the collection of light emitted by the light source .

[0028] The prism has at least one light beam incident surface for collection, one image output surface, and one collection surface;

[0029] The collection surface of the prism is attached to the living finger and palm to be collected, and a finger and palm print pattern is formed on the collection surface; the so-called living finger and palm refer to human fingers, toes, palms, and soles of feet. The so-called f...

Embodiment 2

[0035] Referring to Fig. 5, Fig. 6, Fig. 7, Fig. 8, a kind of living body finger and palmprint collection device has a housing 10, a collection window 11 is arranged on the top of the housing, a prism 12 is housed on it, and the prism has at least one collection window 10. With beam incidence surface 123, an image output surface 122, a collection surface 121; In said incidence surface one side is provided with infrared light-emitting plate 13, the normal line of this infrared light-emitting plate is orthogonal to collection with beam incidence surface (can also be provided with into a substantially orthogonal state), a lens assembly 14 is arranged on one side of the image output surface, an image sensor 15 is arranged at the output end of the lens assembly, and the optical axis of the lens assembly is orthogonal to the image output surface; the infrared The light emitting board, the lens assembly and the image sensor are installed in the housing. Referring to Fig. 8, the prism...

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Abstract

The invention relates to a living body finger palm print collecting method and device. The device includes prism, light source, components of a lens, and collecting device formed by image sensor. The method includes the following steps: jointing the prism collecting side with the living body finger palm to form finger palm pattern; opening the infrared source to make light beam enter the prism from the incidence plane and project on the finger palm pattern; reflecting the light beam by the collecting side to form image light beam with finger palm pattern and 700nm-1100nm wavelength range and outputting by the image output side; projecting the image light beam to the image sensor by the components of a lens; transforming the light signal into electrical signal. The invention uses color image sensor in photo-electricity finger palm print collecting which can reduce product cost without color difference and image resolution reducing.

Description

technical field [0001] The invention relates to a method and device for collecting living finger and palm prints. The method and device use a specific infrared light source for illumination and rely on an image sensor for signal conversion to realize the collection of living finger and palm prints. Background technique [0002] In the prior art, the commonly used photoelectric collection method of fingerprints and palmprints is realized by utilizing the total reflection characteristics of prisms. The prism has a light splitting effect. In order to avoid chromatic aberration from affecting the image quality of fingerprints and palmprints, a monochrome light source and a monochrome image sensor must be used. Generally, red light is used as the monochromatic light source, and some schemes use infrared light source. Chinese patent 94239537.9 discloses an infrared fingerprint identification device, which includes a housing, a camera and a computer. An isosceles right-angled pris...

Claims

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Application Information

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IPC IPC(8): G06K9/20
Inventor 刘晓春孙苏平张宏李建民
Owner 北京海鑫科金高科技股份有限公司
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