WO2006062926A1 - Procédés de préparation de la peau pour l’acquisition d’une image biométrique - Google Patents

Procédés de préparation de la peau pour l’acquisition d’une image biométrique Download PDF

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Publication number
WO2006062926A1
WO2006062926A1 PCT/US2005/044006 US2005044006W WO2006062926A1 WO 2006062926 A1 WO2006062926 A1 WO 2006062926A1 US 2005044006 W US2005044006 W US 2005044006W WO 2006062926 A1 WO2006062926 A1 WO 2006062926A1
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WO
WIPO (PCT)
Prior art keywords
skin
alcohol
oil
image
alkyl
Prior art date
Application number
PCT/US2005/044006
Other languages
English (en)
Inventor
Eric S. Kolb
David A. Waldman
Original Assignee
Aprilis, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Aprilis, Inc. filed Critical Aprilis, Inc.
Publication of WO2006062926A1 publication Critical patent/WO2006062926A1/fr

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/117—Identification of persons
    • A61B5/1171—Identification of persons based on the shapes or appearances of their bodies or parts thereof
    • A61B5/1172—Identification of persons based on the shapes or appearances of their bodies or parts thereof using fingerprinting
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms

Definitions

  • Fingerprints comprise topological patterns of raised ridges and recessed valleys, with small sweat pores disposed along the ridges.
  • a typical skin surface used for biometric imaging, such as a fingerprint comprises a pattern of ridges separated by valleys, and a series of pores that are located along the ridges.
  • the ridges are usually 100 to 300 ⁇ m wide and can extend in a swirl-like pattern for several mm to one or more cm. These ridges are separated by valleys with atypical ridge-valley period of approximately 250-500 ⁇ m.
  • pores significantly increases the reliability of fingerprint comparisons, and substantially reduces the false accept rate, as well as providing positive identification with use of fingerprint sample areas as small as 0.1 x 0.1 inches.
  • pores (as well as valleys on skin surface) contain secretion of sweat glands, sebaceous glands and shed keratinocytes as well as environmental pollutants.
  • incident light ray can be directed to interact with the surface in such a way that at the location of valleys (where no contact is made) light is totally internally reflected (TIR) or in other cases is reflected but at angles below the critical angle for total internal reflection. Where the skin ridges contact the surface, the light is absorbed and scattered rather than specularly reflected. With a properly placed detector, an image of the surface topology of skin at the platen surface can be captured.
  • the purpose of this invention is to provide a method of treating skin that simultaneously enhances accurate contact of raised ridges with a sensor surface, and prevents valleys and pores from making contact with the sensor. It is particularly useful for acquisition of high resolution fingerprint images that have clearly resolved sweat pores as well as fine detail of the ridge contour.
  • the present invention is a method of obtaining an image of the surface topology of a skin sample comprising contacting the skin with a surfactant or an emollient dissolved in a volatile component and acquiring an image of the skin sample.
  • the present invention is a method of obtaining an image of the surface topology of a skin sample comprising contacting a surface of skin with a solution of a surfactant or an emollient in a volatile component; contacting the surface of skin by a skin contact surface of an image acquisition device; directing a light beam at the interface between skin and the skin contact surface of the image acquisition device, thereby reflecting the light beam at the interface; and detecting the reflected light, thereby acquiring the image of the topological features of the surface of skin.
  • FIG. 1 is a schematic diagram of an image acquisition device that can be employed to practice the present invention.
  • FIG.2 is a schematic diagram of an image acquisition device based on total internal reflection that can be employed to practice the present invention.
  • FIG. 3 is an image of a fingerprint of a subject, acquired without employing the compositions and methods of the present invention.
  • FIG. 4 is an image of a fingerprint of the subject of FIG. 3, acquired following the treatment as described in Example 4.
  • the present invention is a method that enhances the quality and accuracy of an acquired image of any surface topology present on skin of a subject, preferably human, which, by way of example, can be a rolled and/or slap fingerprint, palm print, toe print and the like, and hereinafter, for convenience, will be referred to as a "fingerprint".
  • the instant invention is a process that cleans and modifies the fingerprint (i.e. skin surface), and thereby coats or treats the skin surface with a wetting agent having a carefully controlled thickness. Cleaning and modifying removes dirt, salt and excess moisture so that these potential image defects are not included as part of the fingerprint to be acquired.
  • the wetting agent ensures that the raised ridges will make continuous, well-defined physical contact with the sensor surface. If, for example, the detection method is optical then such physical contact causes optical contact at locations where the raised ridges contact the sensor surface.
  • the amount of the wetting agent applied to the skin surface is carefully controlled so that it does not fill valleys and pores and thus does not cause these features to be absent in the acquired or enrolled fingerprint image.
  • the process of the invention comprises contacting the skin surface with a solution of one or more surfactants or emollients in one or more volatile liquid(s).
  • skin surface is contacted by a cloth, paper towel, fabric or the like imbibed with a solution of one or more surfactants or emollients in one or more volatile liquid.
  • a volatile liquid can, by way of example, be an alcohol or alcohol and water mixtures at azeotropic concentration.
  • the alcohol is a C1-C6 straight or branched alcohol.
  • surfactant used interchangeably herein with the term “wetting agent” refers to any surface-active compound, i.e. substance which lowers the surface tension of the medium in which it is dissolved, and/or the interfacial tension with other phases, and, accordingly, is positively adsorbed at the liquid/vapor and/or at other interfaces.
  • surfactants are chemical compounds capable of encapsulating or dissolving hydrophobic molecules, such as molecules that comprise fat, mechanical lubricants and the like, and then can themselves be dissolved in a hydrophilic solvent, such as water.
  • Surfactants can be ionic, nonionic or include combinations of both.
  • Anionic surfactants may include, for example, carboxylates such as alkylcarboxylates (carboxylic acid salts) and polyalkoxycarboxylates, alcohol ethoxylate carboxylates, nonylphenol ethoxylate carboxylates, and the like; sulfonates
  • alkylsulfonates such as alkylsulfonates, alkylbenzenesulfonates, alkylarylsulfonates, sulfonated fatty acid esters, and the like; sulfates such as sulfated alcohols, sulfated alcohol ethoxylates, sulfated alkylphenols, alkylsulfates, sulfosuccinates, alkylether sulfates, and the like; and phosphate esters such as alkylphosphate esters, and the like.
  • Nonionic surfactants may include those having a polyalkylene oxide polymer as a portion of the surfactant molecule.
  • Such nonionic surfactants include, for example, chlorine-, benzyl-, methyl-, ethyl-, propyl-, butyl- and other like alkyl- capped polyethylene glycol ethers of fatty alcohols; polyalkylene oxide free nonionics such as alkyl poly glycosides; sorbitan and sucrose esters and their ethoxylates; alkoxylated ethylene diamine; alcohol alkoxylates such as alcohol ethoxylate propoxylates, alcohol propoxylates, alcohol propoxylate ethoxylate propoxylates, alcohol ethoxylate butoxylates, and the like; nonylphenol ethoxylate, polyoxyethylene glycol ethers and the like; carboxylic acid esters such as glycerol esters, polyoxyethylene esters, ethoxylated and glycol esters of
  • Cationic surfactants include amines such as primary, secondary and tertiary monoamines with Ci 2 -C 18 alkyl or alkenyl chains, ethoxylated alkylamines, alkoxylates of ethylenediamine, imidazoles such as a l-(2-hydroxyethyl)-2- imidazoline, a 2-alkyl-l-(2-hydroxyethyl)-2-imidazoline, and the like; and quaternary ammonium salts, as for example, alkylquaternary ammonium chloride surfactants such as n-alkyl(Ci 2 -Ci 8 )dimethylbenzyl ammonium chloride, n-tetradecyl dimethylbenzylammonium chloride monohydrate, a naphthylene-substituted quaternary ammonium chloride such as dimethyl- 1-naphthylmethylammonium chloride, and the like; and other like cationic sur
  • surfactants include detergents such as Triton XlOO and Silwet L-7608.
  • Other examples include lecithin, ethyleneglycol monobutylether and fatty alcohols.
  • the term "emollient” refers to any of a variety of substances that have a so-called moisturizing effect when applied to the skin. Emollients soften skin making the skin more pliable and flexible. Moisturizers add moisture to the skin. This also aids in skin elasticity. Emollients have two actions, occlusive, which provides a layer of oil or the like to slow the loss of water from the skin (stratus corneum) and humectant, which increase the water holding capacity in the Stratum corenum (skin).
  • Emollients may be classified under such general chemical categories as esters, fatty acids and alcohols, vegetable oils, silicone oil, mineral oil, polyols such as Glucam E20 and Glucam ElO, and hydrocarbons.
  • Esters may be mono- or di-esters.
  • Acceptable examples of fatty di-esters include dibutyl adipate, diethyl sebacate, diisopropyl dimerate, and dioctyl succinate.
  • Acceptable branched chain fatty esters include 2-ethyl-hexyl myristate, isopropyl stearate and isostearyl palmitate.
  • Acceptable tribasic acid esters include triisopropyl trilinoleate and trilauryl citrate.
  • Acceptable straight chain fatty esters include lauryl palmitate, myristyl lactate, oleyl eurcate and stearyl oleate.
  • Preferred esters include coco-caprylate and co-caprate), propylene glycol myristyl ether acetate, diisopropyl adipate and cetyl octanoate.
  • Suitable fatty alcohols and acids include those compounds having from about 10 to about 20 carbon atoms. Especially preferred are such compounds such as cetyl, myristyl, palmitic and stearyl alcohols and acids.
  • Vegetable oils include orachis oil, castor oil, cocoa butter, coconut oil, corn oil, cotton seed oil, olive oil, palm kernel oil, rapeseed oil, safflower seed and sesame seed oil, soybean oil.
  • polyols which may serve as emollients are linear and branched chain alkyl polyhydroxyl compounds.
  • propylene glycol, sorbitol and glycerin are preferred.
  • polymeric polyols such as polypropylene glycol and polyethylene glycol.
  • Exemplary hydrocarbons which may serve as emollients are those having hydrocarbon chains anywhere from 12 to 30 carbon atoms. Specific examples include mineral oil, petroleum jelly, squalene and isoparaffins. Specific examples of emollients include polyols, plant extracts and derivatives, lanolins, glycerol, Aloe Vera gel and soy lecitin.
  • alkyl as used herein, unless otherwise indicated, includes saturated monovalent hydrocarbon radicals having straight or branched moieties, typically Cl- C30, preferably C1-C20.
  • alkyl groups include, but are not limited to, methyl, ethyl, propyl, isopropyl, and t-butyl.
  • alkenyl as used herein, unless otherwise indicated, includes alkyl moieties having at least one carbon-carbon double bond wherein alkyl is as defined above. Examples of alkenyl include, but are not limited to, ethenyl and propenyl.
  • alkoxy means an “alkyl-O-" group, wherein alkyl, is defined above.
  • an amino group may be a primary (-NH 2 ), secondary (-NHRa), or tertiary (-NRaR b ), wherein Ra and Rb may be any of the alkyl or alkenyl groups.
  • the present invention is a method of enhancing acquisition of a biometric skin image comprising contacting the skin with a solution of a surfactant or an emollient in one or more volatile components.
  • the present invention is a method of obtaining an image of the surface topology of a skin sample, comprising treating the surface topology by contacting the skin with a surfactant or an emollient dissolved in a volatile component and acquiring a biometric image of the treated skin sample.
  • image acquisition refers to a process of manipulating a suitable optical device to capture an analogous or a digital image of an object, such as skin surface, either in a permanent media ⁇ e.g. photoemulsion, magnetic disk, DVD) or, by way of example, by relaying the light using one or more refractive lens or diffractive optical elements, or combinations thereof, after it has interacted with the fingerprint, to a silicon detector device such as a CMOS or CCD and storing the captured image in a memory device of a computer or on a screen of a digital or analogous imaging system.
  • a suitable optical device to capture an analogous or a digital image of an object, such as skin surface, either in a permanent media ⁇ e.g. photoemulsion, magnetic disk, DVD) or, by way of example, by relaying the light using one or more refractive lens or diffractive optical elements, or combinations thereof, after it has interacted with the fingerprint, to a silicon detector device such as a CMOS or CCD and storing the captured image in
  • the image can be acquired by any of the standard techniques known to a skilled artisan, such as, for example, the devices and the methods described in U.S. Patent Nos. 5,974,162, 5,986,746 and 6,061,463, incorporated herein by reference in their entirety.
  • the inventive methods are especially advantageous, when a high resolution biometric image is acquired.
  • a high resolution image preferably resolves such topological features as pores and friction ridge detail and has about at least 600 pixels per inch, preferably 700 pixels per inch, more preferably 1100 pixels per inch.
  • Any biometric device particularly a device capable of acquiring a pore-resolving image, can be advantageously used with the methods of the present invention.
  • An example of such a device is disclosed in International Application PCT/US2004/019917, incorporated herein by reference in its entirety.
  • a typical device 100 shown in FIG. 1 comprises light source 110, which can be a tungsten lamp, a xenon lamp or, preferably, a source emitting one or a narrow range of wavelengths such as light emitting diodes, laser diodes and the like.
  • the emitted light can be incoherent as is the case for a tungsten lamp, xenon lamp, etc., or can be coherent as is the case for lasers or laser diodes that are depicted in the FIG 1.
  • the wavelength of the lasers can be any suitable wavelength such as 655 nm, 532 nm, 460 nm or 405 nm.
  • Finger 210 (or any other skin surface) is placed on a cover plate 310 made of an optically transparent material.
  • Light from light source 110 is refracted into waveguide 200 along path 420, said waveguide being made of an optically transparent material.
  • the refracted light 420 is reflected at the bottom surface 205 of waveguide 200 and thereby relayed along path 421 to diffractive optical element 305 shown as holographic optical element HOE.
  • HOE 305 diffracts the light in a direction 422 that is perpendicular or preferably near perpendicular to the surface of cover plate 310. Diffracted light 422 interacts with the skin topology 215 of finger 210.
  • HOE 305 does not diffract the reflected light 423, such as when the incident angle to cover plate 310 is not zero degrees and is inclined at a large enough angle (depends upon the thickness of the HOE) so that the reflected light 423 is not diffracted by HOE 305, so that the signal- to-noise of the detected image is maximized.
  • the detected image of skin topology 215 is communicated to a computer 260 via interface 255.
  • FIG. 2 Another embodiment of a device suitable for practicing the instant invention is shown in FIG. 2.
  • light from light source 110 is refracted into waveguide 200 along path 420, said waveguide being made of an optically transparent material.
  • the refracted light 420 undergoes Total Internal Reflection (TIR) at the bottom surface 205 of waveguide 200 and is thereby relayed along TIR path 421 to the top surface 207 of waveguide 200.
  • TIR light 421 interacts with the finger 210.
  • Light, shown as path 421a that interacts with top surface 207 at locations 225 corresponding to portions of the skin topology 215 that do not contact the top surface 207, such as valleys or pores, is reflected at TIR conditions along path 426.
  • TIR light 426 is diffracted by HOE 307 in a direction 427 that is substantially perpendicular to the bottom surface 205 of waveguide 200.
  • Diffracted light 427 is relayed by lens 428, which can be one or more lens elements, to detection device 250 that is depicted, by way of example, as a CCD or CMOS sensor array.
  • lens 428 can be one or more lens elements
  • detection device 250 that is depicted, by way of example, as a CCD or CMOS sensor array.
  • HOE 307 diffracts the reflected light 426 in a substantially perpendicular direction so as to avoid having geometric distortions in the detected image.
  • the signal-to-noise of the detected image is maximized when using TIR conditions for light path 421.
  • the incident angle of light 421 be adjusted so that TIR occurs when the top surface 207 is moistened such as by sweat or oils that are present on skin topology 215 of the finger 210. In this manner reflection from top surface 207 will be TIR at locations 225 (pores and valleys) whether the skin topology 215 is moistened or dry. Light that interacts with top surface 207 at locations 220 corresponding to portions of the skin topology 215 that are in contact with the top surface 207, such as ridges, is substantially absorbed by the skin topology along path 424 or is absorbed and scattered. The detected image of skin topology 215 is communicated to a computer 260 via interface 255.
  • the present invention is a method of acquiring an image of the topology of the surface of skin.
  • the method comprises contacting a surface of skin with a solution of a surfactant or an emollients in one or more volatile components, contacting the treated surface of skin by a skin contact layer of an image acquisition device, directing a light beam at the interface between skin and the skin contact layer, thereby reflecting the light beam, and detecting the reflected light, thereby acquiring the image of the topological features of the surface of skin.
  • the process of the invention can include the following steps: a) treating a cloth, paper, or other type of fabric with a carefully chosen liquid composition that comprises one or more wetting agents, such as a surfactant or an emollient, and a volatile cleaning liquid, such as alcohol or alcohol and water mixtures. b) packaging the treated fabric to prevent evaporation of any volatile cleaning liquid, and to provide a convenient means of dispensing the treated fabric. c) cleaning and treating skin surface to be imaged by rubbing the skin surface on a treated fabric. d) pressing the treated skin surface onto the skin contact layer surface of an image acquisition device in order to record a high-resolution, "live scan" fingerprint of the treated finger.
  • a carefully chosen liquid composition that comprises one or more wetting agents, such as a surfactant or an emollient, and a volatile cleaning liquid, such as alcohol or alcohol and water mixtures.
  • the amount of wetting agent applied to the skin surface in step (c) is adjusted by controlling the amount of wetting agent that is imbibed into the treated cloth.
  • a 23 x 23 cm sheet of Exsorbx 400 clean-room cloth from Berkshire was immersed in a hexanes solution containing 1% by weight of Alcolec LV30, a low viscosity lecithin product. After the hexanes solvent was removed by evaporation, the cloth exhibited a weight gain of ⁇ 0.66grams.
  • the dried cloth was stored in a sealed plastic bag with 1.5 ml of isopropyl alcohol until it was uniformly wet with the alcohol. The cloth was then used to treat several fingers according to the process of the current invention as outlined above. Fingerprints, taken before and after treatment, were acquired with a high resolution optical fingerprint sensor of the type described in the patent application US60/480.008. Visual inspection of the acquired images revealed significantly more detail in the prints that were taken after treatment compared to prints of the same finger that were taken before the treatment.
  • a cloth was prepared as described in example 1 except a solid lecitin, Alcolec FlOO, replaced the low viscosity lecitin used in example 1. Treatment of fingers with the cloth of example 2 according to the procedure of this invention significantly increased fingerprint image contrast and detail.
  • Baby Wipes for example, comprise a 16 x 20cm paper towel with absorbed water as a volatile solvent, andNonoxynol-10 (Polyethylene glycol isononylphenyl ether) as a wetting aid or surfactant and Aloe Vera as an emollient.
  • These wipes are packaged in a plastic box with a sealed top that is equipped with a lid to cover the slot used for dispensing individual wipes. The lid can be closed to prevent water evaporation during storage of the wipes. Fingers are treated with a single rub on the Baby Wipe fabric.
  • a single 16 x 20cm fabric can be used to treat all ten fingers of an individual. Images of a fingerprint acquired without and with the Baby Wipe treatment are compared in FIG. 3, untreated, and FIG. 4, treated. Both images were taken under identical conditions using the same high-resolution, optical fingerprint sensor.

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Abstract

La présente invention concerne un procédé pour obtenir une image de la topologie de surface d’un échantillon de peau, qui comprend la mise en contact de la peau avec un ou plusieurs agents tensioactifs et/ou un ou plusieurs émollients dissous dans un composant volatil et l’acquisition d’une image biométrique de l’échantillon de peau.
PCT/US2005/044006 2004-12-04 2005-12-02 Procédés de préparation de la peau pour l’acquisition d’une image biométrique WO2006062926A1 (fr)

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US63340204P 2004-12-04 2004-12-04
US60/633,402 2004-12-04

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WO2006062926A1 true WO2006062926A1 (fr) 2006-06-15

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150320667A1 (en) * 2012-12-26 2015-11-12 L'oreal Molecularly imprinted polymer for selectively trapping odorous molecules
US10772822B2 (en) 2012-12-26 2020-09-15 L'oreal Molecularly imprinted polymers and their use as antidandruff agents
US11246823B2 (en) 2012-12-26 2022-02-15 L'oreal Molecularly imprinted polymer of sol-gel type for selectively trapping odorous molecules

Citations (5)

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Publication number Priority date Publication date Assignee Title
JPS6285985A (ja) * 1985-10-14 1987-04-20 Kazuo Sakai 手足型の印章採取方法
US5737071A (en) * 1996-08-16 1998-04-07 Identicator Corporation Method and apparatus for enhancing live-scan fingerprint reader images
JP2000245714A (ja) * 1999-02-26 2000-09-12 Nagoya Aerosol Kogyo Kk 指掌紋押捺用皮膚調整剤
JP2003159233A (ja) * 2001-11-28 2003-06-03 Nagoya Aerosol Kogyo Kk 指掌紋読み取り用皮膚調整剤
JP2004118696A (ja) * 2002-09-27 2004-04-15 Secom Co Ltd 指紋入力装置

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6285985A (ja) * 1985-10-14 1987-04-20 Kazuo Sakai 手足型の印章採取方法
US5737071A (en) * 1996-08-16 1998-04-07 Identicator Corporation Method and apparatus for enhancing live-scan fingerprint reader images
JP2000245714A (ja) * 1999-02-26 2000-09-12 Nagoya Aerosol Kogyo Kk 指掌紋押捺用皮膚調整剤
JP2003159233A (ja) * 2001-11-28 2003-06-03 Nagoya Aerosol Kogyo Kk 指掌紋読み取り用皮膚調整剤
JP2004118696A (ja) * 2002-09-27 2004-04-15 Secom Co Ltd 指紋入力装置

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PATENT ABSTRACTS OF JAPAN vol. 2000, no. 12 3 January 2001 (2001-01-03) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 10 8 October 2003 (2003-10-08) *
PATENT ABSTRACTS OF JAPAN vol. 2003, no. 12 5 December 2003 (2003-12-05) *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20150320667A1 (en) * 2012-12-26 2015-11-12 L'oreal Molecularly imprinted polymer for selectively trapping odorous molecules
US10772822B2 (en) 2012-12-26 2020-09-15 L'oreal Molecularly imprinted polymers and their use as antidandruff agents
US10772823B2 (en) * 2012-12-26 2020-09-15 L'oreal Molecularly imprinted polymer for selectively trapping odorous molecules
US11246823B2 (en) 2012-12-26 2022-02-15 L'oreal Molecularly imprinted polymer of sol-gel type for selectively trapping odorous molecules

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