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公开(公告)号：NO864827L
公开(公告)日：1987-01-30
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：CA1216946A
公开(公告)日：1987-01-20
申请号：CA452862
申请日：1984-04-26
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL , GINSBERG EMILY
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 subfields 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：FI864881A
公开(公告)日：1986-12-01
申请号：FI864881
申请日：1986-12-01
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
Abstract: A set of Search identification points (16) derived from an optical scan (12) of a finger are compared against File identification (18) points for the same finger. A multiple comparator (20) divides the finger image into multiple segments. The Search and File points from each segment are compared separately. A difference table (D.T.) (22) provides a proximity value Q for each search point. The D.T. is purged (28, 30) of all entries representing multiple Search points. The purge keeps those entries having the highest Q value. The purged D.T. with recalculated Q values is the basis for correcting the position of each Search point on the image plane to compensate for shift in finger position and for the variable distortion and changes that come about in a finger over time and upon successive applications of the finger to input scan (40). The corrected Search points are compared against the File points to establish a new D.T. A proximity value Q for each entry on this D.T. is calculated and a proximity value Q for the entire table is calculated. These proximity values in view of the number of entries on the difference table are used to verify identification in a scoring routine (52).
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公开(公告)号：DK567185A
公开(公告)日：1986-06-08
申请号：DK567185
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 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：NO852749L
公开(公告)日：1986-01-13
申请号：NO852749
申请日：1985-07-08
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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Patent Agency Ranking
公开(公告)号：FI852761L
公开(公告)日：1986-01-13
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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公开(公告)号：AT46779T
公开(公告)日：1989-10-15
申请号：AT83102997
申请日：1983-03-25
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
Abstract: An automatic fingerprint enrollment and identification technique is provided for automatically processing an input image represented by pixels having either a one or a zero value. The automatic processing involves a series of steps in which the initial processing is a rough screening technique for eliminating a reasonable portion of the noise while passing through almost all of the minutia. As the steps proceed, the processing becomes more complex to provide a tighter screening out of noise while passing through as much of the minutia as possibe. The later steps by operating on relatively fewer minutia or anomaly points that the earlier steps can be economical though more complex so as to be more discriminate than the earlier steps. The processing provides an optimum trade off between enrolling as large a proportion of the population as possible while minimizing the number of false identification errors.
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公开(公告)号：IL71663A
公开(公告)日：1987-09-16
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：NO864827A
公开(公告)日：1987-01-30
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：DK580486A
公开(公告)日：1986-12-02
申请号：DK580486
申请日：1986-12-02
Applicant: FINGERMATRIX INC
Inventor： SCHILLER MICHAEL
IPC: G06K20060101 , G06K9/62
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