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公开(公告)号：FI854807A0
公开(公告)日：1985-12-04
申请号：FI854807
申请日：1985-12-04
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：ZA842972B
公开(公告)日：1984-12-24
申请号：ZA842972
申请日：1984-04-19
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL , GINSBERG EMILY
IPC: G06T7/00 , A61B20060101 , G06K20060101 , G06K9/00 , G06K , A61B
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公开(公告)号：CA1166445A
公开(公告)日：1984-05-01
申请号：CA375249
申请日：1981-04-10
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
Abstract: FINGER IDENTIFICATION A finger pressed against a platen provides a fingerprint object which is scanned by an interrogating beam of collimated light in the form of a slit and that is linearly displaced across the platen. As the slit-beam scans across the back surface of the platen, the reflected light beam is modulated. The modulated beam is imaged onto a linear array of photodiodes to provide a series of output signals indicative of modulation information. The outputs of the diodes are serially interrogated at each of successive scan positions to provide a set of signals containing fingerprint information. The platen has a transparent glass base. A layer of transparent, compressible, resilient epoxy is on the back of the glass base. The epoxy layer has a flat back surface. A thin silver reflecting layer on the back surface of the epoxy provides a flat mirrored surface to reflect the light beam. A further epoxy layer on top of the silver provides mechanical filtering. A lacquer layer at the back protects the platen from wear. When a finger is applied to the back surface, the ridges of the finger distort the underlying layers sufficiently so that the reflected light at the ridge zones is scattered while the reflected light at the valley zones is collimated. This difference in scatter is transformed by an imaging lens to a difference in intensity at the diode array.
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公开(公告)号：CA1161250A
公开(公告)日：1984-01-31
申请号：CA375256
申请日：1981-04-10
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
IPC: A61B5/10
Abstract: FINGER IDENTIFICATION A finger pressed against a platen provides a fingerprint object which is scanned by an interrogating beam of collimated light in the form of a slit and that is linearly displaced across the platen. As the slit-beam scans across the back surface of the platen, the reflected light beam is modulated. The modulated beam is imaged onto a linear array of photodiodes to provide a series of output signals indicative of modulation information. The outputs of the diodes are serially interrogated at each of successive scan positions to provide a set of signals containing fingerprint information. The platen has a transparent glass base. A layer of transparent, compressible, resilient epoxy is on the back of the glass base. The epoxy layer has a flat back surface. A thin silver reflecting layer on the back surface of the epoxy provides a flat mirrored surface to reflect the light beam. A further epoxy layer on top of the silver provides mechanical filtering. A lacquer layer at the back protects the platen from wear. When a finger is applied to the back surface, the ridges of the finger distort the underlying layers sufficiently so that the reflected light at the ridge zones is scattered while the reflected light at the valley zones is collimated. This difference in scatter is transformed by an imaging lens to a difference in intensity at the diode array.
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公开(公告)号：AU4132697A
公开(公告)日：1998-03-06
申请号：AU4132697
申请日：1997-08-12
Applicant: FINGERMATRIX INC
Inventor： MARCUS DANIEL H , PEKCAN HAKAN I , CHILCOTT WILLIAM , SCHLANG ARTHUR
Abstract: A fingerprint enhancement system has a platen with a liquid contacting and finger-touching surface. Two collimated interrogating light beams lie below and are opposite sides of the finger-touching surface. The horizontal extensions of the light beams assume an angle of approximately forty-five degrees with the finger longitudinal axis. Side surfaces of the platen are oriented normal to the incident colliminated light beams prior to interrogation. The light beam modulated by the fingerprint passes to a reflecting mirror, imaging means and a scanner below the platen. A polarizing filter lies between the platen and reflecting mirror. A second polarizing filter lies above the platen. A contrast enhancement circuit increases the modulation of the scanned fingerprint signal and automatically adjusts the level of the modulated signal without saturation. Circuit filtering eliminates spurious input signals. Finger position sensing by a light emitting diode and photo transistor is also provided.
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Patent Agency Ranking
公开(公告)号：IL86679D0
公开(公告)日：1988-11-30
申请号：IL8667988
申请日：1988-06-09
Applicant: FINGERMATRIX INC
IPC: G06K20060101 , G06K
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公开(公告)号：FI880364A
公开(公告)日：1988-07-30
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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38.发明专利
公开(公告)号：CA1234218A
公开(公告)日：1988-03-15
申请号：CA497068
申请日：1985-12-06
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 horizonally 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 horizonally derived image which includes the best imagery from each of those two intermediate images.
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公开(公告)号：DK47288D0
公开(公告)日：1988-01-29
申请号：DK47288
申请日：1988-01-29
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：CA1232071A
公开(公告)日：1988-01-26
申请号：CA485540
申请日：1985-06-27
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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