Optical finger image processing apparatus and method

[Detailed Description of the Invention]

Technical field The present invention relates to fingerprint discernment and a fingerprint processing unit. The present invention relates to Wear B1. which calls to an individual finger object, reflects light, and obtains an optical image in detail. Conventional technology The optical instrument fingerprint identification unit is indicated to United States patent 4.322nd and 163+'i which were published on March 30, 1982, It is To do which scans a Work 1zeta finger optically on pressure plate [platen, and -C abnormal conditions of are done, and takes out Punched reflected ray and to which 1 and this connect an image with optical VC According to electronic processing device. It is indicated to the above-mentioned patent and l Pressure plate is by various pressure plate Kanekura Hmm with the glass pressure plate (they are a hard court pressure plate and 1+1-Fu henceforth) and the reflective surface which had an antireflection coat layer in the surface which receives a finger. As for the image which is reflected from the finger object on these pressure plates, and is obtained by 7c light, it is part-ing to collapse the smooth continuation pattern of a fingerprint upheaval part, and to include peak parts or distortion in 7 Fine. That is, a hard court pressure plate rises and falls spatially, and produces 1 This item cycle ingredient, and this needs to be amended in the electronic image processor by the side of the lower stream. It makes it difficult to draw the continuous pattern in which the corner and ups and downs with a thin image should be analyzed by being made from this hard court pressure plate. It Scarce to repetition nature and the trap high frequency ingredient with ups and downs of an image is .. the detailed precision which is visible to the surface of To and this image -- actual -- a root -- it is distortion of f - A return pattern. It is important for a fingerprint identification unit that it can use for most extensive possible people. The fingerprint identification unit must pile the finger surface of an upheaval part and trough shape which was rich in ups and downs from those [ few ] of change of a fingerprint upheaval part and a trough who have the smooth finger surface relatively, and must process it extensively by person 1. In using the pressure plate of elasticity, since the strange roux of those who have the upheaval part and trough which were rich in ups and downs is carried out very much, it turns out that an image is distorted easily. The object of an invention The object of the present invention has these e Nozu in offer 1 * To in the mechanism which amends and minimizes a Mya detailed part. It is important for amendment art that the Finger image pattern of Hope can be provided, without worsening effect and worth of this I do not care device. amendment art -- the price of devices -- it is -- it is a pile and an important point that it is made not to carry out a rise [ nine ]. it is application that it is applicable to the person of Niji many to people who change -- Choke -- don't exceed the grade of a thing and an advantage and don't cause the addition of 7zeta price. Therefore, the present invention must achieve the above-mentioned object within limits which control the efficiency fall of other devices, and the increase in a device and processing time. and it is which of Ah Si and balance therefore that the object of the present invention improves the optical image of the finger which simplifies the electronic processing device by the side of the lower stream to an important thing -- it is in providing budget prices and quick processing. In order to simplify explanation, U.S. Pat. No. 4,322,163 is referred to here. Constitution of an invention In the present invention, it calls out upstream of a pressure plate, and an optical diffusion member is inserted into light. As a result, the incidence light which is partially diffused on the finger object for which it appeals, and has not been completely diffused on it is provided. EXAMPLE Although Drawing 1 shows the optical diagram of the example of the optical fingerprint image processor by the present invention and is similar to United States patent 4.322nd and Drawing 3 of No. 163, ↓ Si improvement is carried out and it includes the 7C feature in the present invention. Drawing 2 is what was [ the relation between the upheaval part on Ah Si, a pressure plate, and the surface of a finger, and a trough ] part-Si-easy, and expressed it with the transverse cross section of the pressure plate of elasticity, and this figure should be compared with Drawing 7 of the above-mentioned patent. Drawing 3 is an enlarged drawing showing one example of a frosted glass diffusion member. the -- the [A / 4 / figure and ] -- it is what compared and showed the fingerprint image obtained without obtainingB [ 4 ] figure with the application of the present invention, and applying 1zeta fingerprint image and the present invention -- the [ Ah Si and ] -- the [ what twistsA / 4 / figure to a prior art, and ] --B [ 4 ] figure is based on the present invention. To To do shown in 0 figure 1 which is the figure as Drawing 2 showing the hard court pressure plate which gave the antireflection coat, i.e., a glass pressure plate, where Drawing 5 is the same, The light emitted from a light source like laser device 16 is appropriately fabricated by lens 18*20 as Engineering, calls out, and collides with light 61, and Si and this finger F with which it called and 1= Rays 61 was assigned to pressure plate 32. in the example shown in a figure, pressure plate 32 is attached to movable carriage 62, and finger F and pressure plate 32 become To do which can move (it is to the right from the left in Drawing 1) -- Si and a finger are scanned with light 61. A finger and pressure plate 32 can be fixed and it can also scan by moving appeal light as stated to the above-mentioned patent. Although the latter method is used these days in many cases, especially about such a scan, reflected ray 63 which is not important for the present invention is modulated by the finger information on finger object F. The electronic scan with which O detecting device 12 whose lens 65 is a finger, and from which it is made for Gt'c to connect and this is detected by optical combination detecting device 12 synchronized is quickly performed compared with an optical scan, and a series of picture matter (pixel) can be obtained from the image of a finger, and it can perform fingerprint image processing now. Glass material 92 whose pressure plate 32 of the elasticity shown in Drawing 2 of 6 mm of nominal value Modl thickness is relatively transparent, and epoxy overlay 94 of 0.25-mm thickness. the 2nd epoxy overlay 97 of 0.05-mm thickness, and Raqqah of 0 or 025-mm thickness -- 99 is comprised further. Two-layer silver IV!j96.98 is the thickness of 3.000 A of Packed. Upheaval part Fr of a finger changes 94.97t of epoxy overlay [ of elasticity ] -, and reflecting layer 96 is moved with these layers as Engineering, Reflecting layer 96 is shown in 0 figure 2 relatively corresponding to upheaval part Fr of a flat portion and a finger corresponding to trough Fv of a finger which becomes a round portion relatively, 0 reflected as reflected ray 63 which peels off incidence light 61 of the lower part of a valley with an incidence angle, and has an equal angle of reflection -- O in which this reflected ray 63 does not carry out Almost dispersion -- in detecting device 12, this reflected ray 63 ties an image as an optical zone, and is detected. On the other hand, the round portion of reflective 1iiii96 in which a finger carries out upheaval part FrVC correspondence makes reflected ray 63 produce big dispersion more substantially than the case in trough Fv of a finger. However, also although a trough dispersion-Niji-size-comes and dispersion which takes place in the lower part of an upheaval part is arranged, it is a To fit thing in the optical caliber of lens 65. Though the light intensity in 0 Nobuko side this [ whose ] is the Akimitsu image differs since the image in the image plane of lens 65 is a substantial image of reflecting layer 96 as stated to the above-mentioned patent, 0 which is too bright for the light in an upheaval part and a trough using, therefore detecting device 12 shift distance only a few from an image plane -- C, for example, l, -- or 2 A arrangement is carried out. In this I do not care arrangement, the lights scattered from the round portion of the lower part of an upheaval part will not connect a focus appropriately, but, therefore, contrast of an upheaval part and a trough will produce them. That is, the upheaval part whose focus does not suit to the lower stream side of an image plane appears darkly, and, on the other hand, a trough appears brightly. Although the reason was not necessarily clear to the upper stream side, as the trough was expected, in an image plane, it appears brightly similarly, but trough ↓ Si and xp in an image plane are brighter, and the brightness of an upheaval part comes to appear. Diffusion member 21 calls out and it is arranged in the position which adjoined directly the light more preferably emitted from laser device 16 in light 61. A standard frosted glass diffusion member is used and the quantity of the passage light (Croas+over) in appeal light 61 is defined appropriately. However, as for the grade of diffusion, to the degree which acts as a complete diffuser sound student, the directivity of a great portion of light is not lost greatly. When there is no diffusion member 21, with a specific image of the upheaval part in detecting device 12, it depends person C2, is distorted and hail To be is known. To many people, even if fingerprint Processing equipment has diffusion member 21 and there is, it can act similarly. [ no ] however, the height of the upheaval part to the trough of a fingerprint -- the time -- Stand - rising and falling -- Listen -- as -- specific -- people -- receiving -- a detecting device -- it can set -- upheaval -- a part -- an image may collapse to some extent and it may be doubled. For this phenomenon, the use area of such a fingerprint image processor will be restricted. However, if diffusion member 21 is provided, the above-mentioned problem will be solved, without losing the degree of validity to those who also require the smooth finger surface (that is, the height of the upheaval part to a trough is low) by - relatively. the -- the [A / 4 / figure and ] -- the example of the image is shown inB [ 4 ] figure. the --A [ 4 ] figure shows the image in which it was distorted when a specific person's fingerprint is taken with the device of Drawing 1 in which diffusion member 21 is not provided. the --B [ 4 ] figure shows the image which provided diffusion member 21 and has been improved. the --A [ 4 ] figure and a miB figure are images being taken by the same person. It can recognize by difference brush A while ago and the eyes of these figures. deer L2 While -- these Me 4 -- it is -- it is still more important than the case where it recognizes by the eye in an automatic processing unit. the -- it is, and since this does not reflect Hope shown inA [ 4 ] figure, and genuine details, distortion eventually makes r Bargain purchase perplexed in a fingerprint registration sentence it is in that there is no marginal return nature in such distortion at the important end of this -- the --A [ 4 ] figure -- Show -- f+ To -- an image [ like ] is registered -- 1zeta people -- the following opportunity (not carried out another [ ij IJN Gender as well-The L The 11. ].) It is reliable and it is important for I get the whole product 7zetaCtau with repetition nature that discernment Public and old registration of one copy of fundamental To reject is carried out. It is a small glass board which is shown in Drawing 3 of diffusion member 21 beach and which To do [lusterless side 21fk has. It is used for an examination, 1 This diffusion boards 21 are all the particle size To have things 10 micrometers in diameter, and it is Ah 1 This. or the particle size of 21 f of frosted glass sides is important for how much -- a part for Over -- , -- although there is nothing, if a particle size passes in side power, in size, diffusion should not hear -- the grade of - Calling for light gets worse, if a particle size is too large, diffusion will become small and, as for profit tL(s), a predetermined result will be lost. And it does not seem that August of glass board 21 has an important meaning. Drawing 5 shows pressure plate 92 which diffusion member 21 gives an improvement in the device of Drawing 1. 0 to which this A and - Doko pressure plate 92 have antireflection coat 101 in the finger contact surface -- this pressure plate is shown in United States patent 4.532nd and Drawing 8 of No. 163 -- it is explained in detail by Si and there. However, when applying to such an antireflection coat pressure plate Kanamoto invention, the position of Detector @12 must be moved to Because from the image plane of lens 65 acquiring the effect of a request of diffusion member 21. both [ therefore, / with the elasticity of Drawing 2 ] the pressure plate which can be changed, and an antireflection glass pressure plate -- although -- the present invention which provided diffusion member 21 -- it can be used for both devices being improved. The effect which uses diffusion member 21 with the hard court pressure plate of Drawing 5 is Filtration about a sharp discontinuous corner. It is in making a continuous image by the plane of Detection device 12. therefore -- as a result diffusion member 21 rises and falls spatially and it filters a friend high frequency ingredient, the electronic device by the side of the lower stream is simplified, and a price is reduced -- Niji -- it becomes effective processing fashion." And a profitable i11zeta image is improved to all people. The advantage used with a pressure plate with the elasticity of diffusion member 217? figure 2 is amending the duality of specific 8[hail The image, and is ?5 To. The image collapsed although the pressure plate of a reason of the elasticity of Age 2 figure was clear enough using a Engineering <line crack and such a pressure plate and Vi did not have-like high h+J wave ingredient Overthrow between Desire is made, and 7 This, fundamentally, Acceptance puts a specific person into such fingerprint Image processing U, and it uses him for it effective in that of 1. To. This (the thing [ The ] for which some VC has different Advantages when using it with the hard court pressure plate of 5 figure diffusion member [ ls / like ] 21, Discover 1 (.)) the advantage of the spatial high frequency ingredient filtration obtained by the pressure plate of elasticity without this pressure plate producing the duality or the collapse which arose to the person of EK Special feature who uses the pressure plate of elasticity -- or is provided a little. As a result, it makes it possible to use the easy hard court pressure plate of device [figure 5 currently considered that this Diffusion section invitation 21 has all the pressure plate To fly necessities for the elasticity of Drawing 2.

[Brief Description of the Drawings]

Drawing 1 -- the schematic illustration of the example of an optical fingerprint image processor, and Drawing 2 -- the transverse cross section of the pressure plate of elasticity, and Drawing 3 -- the [ the enlarged drawing of one example of a frosted glass diffusion member, an 8I\4A figure, and ] --B [ 4 ] figures are a figure by a prior art and the present invention in which swerving and showing the fingerprint image of You il, and a transverse cross section of a 5th [ The ] figure tJ hard court pressure plate. 12 ...... ": (16), Detector et al. ...... [ ...... A pressure plate, 61 / ...... Appeal light, 63 / ..... A reflected ray, F / ...... A finger, F"r / ...... An upheaval part, Fv / ...... Trough. ] Laser Wear[f, 18-20-65 ...... A lens, 21 ...... A diffused part play, 32 Applicant for a patent Finger matrix In Koho rated patent Departure representative obtaining -- 1 * Doctor Akira Aoki patent attorney Kazuyuki Nishidate Patent attorney Kyosuke Nakayama Patent attorney Akiyuki Yamaguchi Written amendment (method) October, Showa 58 q mouth Commissioner of the Patent Office Japan cedar Kazuo Display of Mister 1 and an incident Showa 58 Patent application No. two 124104, the name optical fingerprint image processor of an invention, method 3, those that do amendment Relation with an incident Applicant for a patent Name finger matrix In Koho rated 4, representative (outside 3 name) 6, the object of amendment (1) the column (4) of "an applicant's representative" of the A (3) request of "the 2nd application number of a claim of priority" of the column (2) request of "the 2nd filing date of a claim of priority" of a request -- DRAWINGS (5) Power of attorney 7, the contents of amendment (1) Amend at the 2nd filing date "it is about June 22, 1983" on [June 23, 1983" of a claim of priority. (2) that of an exception and A lick -- Si (3) The passage of an attached sheet (4) that of Purification 1 (change outside's using contents) (5) attached sheet of a drawing -- Si 8, the list of attached papers (1) Correction IiA document One-copy (2) drawing An one-copy (3) power of attorney and translation One-copy each (4) statement of reasons One copy