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公开(公告)号：NO861058L
公开(公告)日：1986-09-29
申请号：NO861058
申请日：1986-03-19
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
Abstract: An optical and electronic scan produces an image composed of binary value pixels. An automatic picture compression routine reduces the number of pixels in the image. A first stage four to one reduction in the number of pixels is achieved by treating each mutually exclusive four pixel unit as a separate set. A binary value is assigned to each four pixel set. That binary value is assigned to a single pixel in a first output image. The same process is repeated a second time to provide a final output image that has one-sixteenth the number of pixels as has the original input image. The value assigned to each four pixel unit set is a weighted function of the binary value of each of the sixteen pixels in a four pixel by four pixel subfield in which the unit set is centered. The greatest weight is give to the center pixels, that is, to the four pixels of the unit set. Lesser weight is given to the peripheral pixels. Among the peripheral pixels, lesser weight is given to the four corner pixels than is given to the eight side pixels between the corners. In the weighting process, the significance of the binary value of the sixteen pixels in the subfield is in part a function of the total pattern of the pixel values in the subfield.
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公开(公告)号：IL71663D0
公开(公告)日：1984-07-31
申请号：IL7166384
申请日：1984-04-27
Applicant: FINGERMATRIX INC
Abstract: An input fingerprint image consists of ones and zeros pixels representing light and dark pixels which in turn correspond to ridge and valley formations. This image is compared with a reference file fingerprint to verify the identity of the input fingerprint. The reference file has two relatively small segments which are subfields of the entire field of pixels that constituted the original fingerprint image for the individual involved. Two substantially larger domain sub- fields are extracted from the input fingerprint image. The center of each segment corresponds to the center of a respective one of the domains. Each segment is scanned over its corresponding domain to determine the position of maximum ones correlation and maximum zeros correlation between each segment and its corresponding domain. These four positions together with the correlation values associated with each of these four positions are subjected to various criteria to provide positive or negative verification of the input image relative to the reference file. These criteria include (a) positional closenes to one another, (b) exclusion of the positions from a predetermined border of the domain, (c) closeness of the correlation values of certain of the positions, and (d) magnitude of the sum of the ones correlations and zeros correlation for certain of the positions.
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公开(公告)号：ZA834961B
公开(公告)日：1984-04-25
申请号：ZA834961
申请日：1983-07-07
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
Abstract: In an optical fingerprint image processing apparatus a light beam is scanned across a finger placed against a transparent platen in order to provide a reflected modulated light beam carrying fingerprint information. The modulated light beam is imaged and the image is intercepted by an array of photo receptors that detect the image and convert the optical signal into electrical signals. The improvement is in placing a diffuser element, which may be a ground glass wafer, in the interrogating light beam. The diffusion of the light beam acts as an effective filter to eliminate the higher spatial frequency components of the optical image and thus provide a fingerprint image having improved continuity.
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公开(公告)号：NO880371L
公开(公告)日：1988-08-01
申请号：NO880371
申请日：1988-01-28
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL , MARCUS DANIEL H
Abstract: The technique for optically scanning a finger to produce a fingerprint image involves positioning the finger surface to be optically scanned so that it is exposed and, in particular, is not pressed against a platen. A slit light beam along the length of the forward part of the finger is circumferentially rotated (38) about an axis (x-x) about the nominal center of the finger. A reflected slit light beam carries modulation information which is focused on a linear array of photo-electric transducers (12) to provide the fingerprint image. The interrogating light is coherent, substantially collimated, light. The plane of the interrogating slit light beam and the plane of the reflected modulated slit light beam are coplanar thereby establishing an illumination plane (42). The illumination plane is parallel to the axis of the finger and is rotated about that axis during the interrogating scan. The illumination plane is slightly offset (d) from that rotational axis and the incident light (16) in the illumination plane impinges on the finger surface at a slight off-normal axis. This offset and off-normal incidence creates two dimensional shadowing. The finger surface being interrogated is positioned slightly off of the object plane for the downstream focusing optics thereby creating a constructive destructive interference effect at the image plane defined by the transducers.
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公开(公告)号：FI880364A0
公开(公告)日：1988-01-27
申请号：FI880364
申请日：1988-01-27
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL , MARCUS DANIEL H
Abstract: The technique for optically scanning a finger to produce a fingerprint image involves positioning the finger surface to be optically scanned so that it is exposed and, in particular, is not pressed against a platen. A slit light beam along the length of the forward part of the finger is circumferentially rotated (38) about an axis (x-x) about the nominal center of the finger. A reflected slit light beam carries modulation information which is focused on a linear array of photo-electric transducers (12) to provide the fingerprint image. The interrogating light is coherent, substantially collimated, light. The plane of the interrogating slit light beam and the plane of the reflected modulated slit light beam are coplanar thereby establishing an illumination plane (42). The illumination plane is parallel to the axis of the finger and is rotated about that axis during the interrogating scan. The illumination plane is slightly offset (d) from that rotational axis and the incident light (16) in the illumination plane impinges on the finger surface at a slight off-normal axis. This offset and off-normal incidence creates two dimensional shadowing. The finger surface being interrogated is positioned slightly off of the object plane for the downstream focusing optics thereby creating a constructive destructive interference effect at the image plane defined by the transducers.
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Patent Agency Ranking
公开(公告)号：NO864827D0
公开(公告)日：1986-12-01
申请号：NO864827
申请日：1986-12-01
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
IPC: G06K20060101 , G06K9/62 , G06K
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公开(公告)号：NO854914L
公开(公告)日：1986-06-09
申请号：NO854914
申请日：1985-12-05
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
Abstract: A gray scale image of a fingerprint composed of a field of pixels is converted to a binary image composed of a field of pixels by a technique which takes into account the directivity of the ridge and valley structure. Three intermediate binary images are developed, one by the use of a vertical filter, one by the use of a horizonal filter and a reference image by the use of a filter which is not directionally biased. Corresponding subfields around each pixel in each of the three images are compared. If the subfield for the vertically derived image is closer to that of the reference image then is the subfield for the horizon- ally derived image, then the binary value for the pixel from the vertically derived image is used in the final image; and vice versa. In this fashion, a fourth a final binary image is derived from a combination of the vertically derived image and horizon- ally derived image which includes the best imagery from each of those two intermediate images.
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公开(公告)号：NO854914A
公开(公告)日：1986-06-09
申请号：NO854914
申请日：1985-12-05
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
CPC classification number: G06K9/00067 , G06K9/38 , G07C9/00158
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公开(公告)号：IL75709D0
公开(公告)日：1985-11-29
申请号：IL7570985
申请日：1985-07-03
Applicant: FINGERMATRIX INC
Abstract: A fingerprint image is derived from the direct optical reading of a finger by an optical and electronic scan of the finger with a beam of coherent, collimated light. The beam is shaped in the form of a slit of light which extends the length of the finger zone to be interrogated. That slit light beam is scanned across the finger in a direction perpendicular to the axis of that slit. The rays which constitute the interrogating light in the slit define an incident light beam in the form of a plane which is substantially perpendicular to the surface of the finger being interrogated. The light beam and the rest of the optical system is rotated about an axis that is substantially coincident with the axis of the finger so that this perpendicular relationship between the plane of the interrogating light beam and the surface of the finger is maintained throughout the scan.
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公开(公告)号：FI852761A0
公开(公告)日：1985-07-12
申请号：FI852761
申请日：1985-07-12
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
Abstract: A fingerprint image is derived from the direct optical reading of a finger by an optical and electronic scan of the finger with a beam of coherent, collimated light. The beam is shaped in the form of a slit of light which extends the length of the finger zone to be interrogated. That slit light beam is scanned across the finger in a direction perpendicular to the axis of that slit. The rays which constitute the interrogating light in the slit define an incident light beam in the form of a plane which is substantially perpendicular to the surface of the finger being interrogated. The light beam and the rest of the optical system is rotated about an axis that is substantially coincident with the axis of the finger so that this perpendicular relationship between the plane of the interrogating light beam and the surface of the finger is maintained throughout the scan.
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