초록 ▼

A reliable, precise, inexpensive, portable digitizer is provided for receiving an identification medium having a fingerprint thereon, including at least one fingerprint discontinuity associated therewith. The exact position of the discontinuity with respect to the edges of the medium is then encoded

A reliable, precise, inexpensive, portable digitizer is provided for receiving an identification medium having a fingerprint thereon, including at least one fingerprint discontinuity associated therewith. The exact position of the discontinuity with respect to the edges of the medium is then encoded by the digitizer by rotating an elongated scale coupled to the base of the digitizer until the fiducial line on the scale is coincident with the discontinuity. A reading is thereafter recorded proportional to the position of the discontinuity along the elongated scale and a reading is also recorded indicative of the angle of the elongated scale, with respect to the base member. These readings are recorded upon the medium, and since the medium has an exact position with respect to the base member, the recorded data is proportional to the position of the discontinuity relative to the dimensions of the card. The above procedure is repeated during verification of the authenticity of the medium, and if the readings match, the medium is deemed authentic.

대표청구항 ▼

1. A method of verifying the authenticity of an identification card having a fingerprint, including at least one fingerprint discontinuity, recorded thereon comprising the steps of: a. providing at least one digitizer having a base member, fiducial means movable with respect to said base member,

1. A method of verifying the authenticity of an identification card having a fingerprint, including at least one fingerprint discontinuity, recorded thereon comprising the steps of: a. providing at least one digitizer having a base member, fiducial means movable with respect to said base member, said referencing means for positioning said identification card at a precise predetermined position upon said base member; b. positioning said identification card at said referencing means; c. producing relative motion between said fiducial means and said base member until said fiducial means coincides with said fingerprint discontinuity; d. recording data from said fiducial means indicative of the exact position of said discontinuity with respect to said base member; e. positioning said identification card at the referencing means of a digitizer substantially identical to said at least one digitizer at a later time; f. repeating step c; and g. comparing the data resulting from carrying out steps e and f with data previously recorded in accordance with steps b, c and d. 2. A method of verifying the authenticity of an identification card having a fingerprint, including at least one fingerprint discontinuity, recorded thereon comprising the steps of: a. providing at least one digitizer having a base member, fiducial means having at least one scale associated therewith, movable with respect to said base member, and referencing means for positioning said identification card at a precise predetermined position upon said base member; b. positioning and identification card at said referencing means; c. producing relative motion between said fiducial means and said base member until said fudicial means coincides with said fingerprint discontinuity; d. recording data from the scale of said fudicial means indicative of the exact position of said discontinuity with respect to said base member; e. repositioning said identification card at the referencing means of a digitizer substantially identical to said at least one digitizer at a later time; f. repeating step c; and g. comparing the data resulting from carrying out steps e and f with data previously recorded in accordance with steps b, c and d. 3. The method as set forth in claim 2 wherein the data resulting from carrying out step d is recorded upon said identification card. 4. The method as set forth in claim 2 wherein the data obtained by carrying out step d is inserted into a data processor. 5. The method of claim 2 wherein said scale includes non-linearly spaced measuring markings. 6. A method of verifying the authenticity of an identification card having a fingerprint, including at least one fingerprint discontinuity, recorded thereon comprising the steps of: a. providing at least one digitizer having a base member, elongated fiducial means having an elongated scale associated therewith and pivotably mounted to said base, an angular scale positioned upon said base adjacent said elongated fiducial means and position referencing means for positioning said identification card at a precise predetermined position upon said base; b. positioning said identification card at said referencing means; c. rotating said elongated fiducial means until said fiducial means coincides with said fingerprint discontinuity; d. recording the reading from said elongated scale aligned with said discontinuity; e. recording the angle from said angular scale indicative of the angular position of said fiducial means when said fiducial means is coincident with said discontinuity; f. repositioning said identification card at said referencing means of a digitizer substantially identical to said at least ond digitizer at a later time; g. repeating step c; and h. comparing the data resulting from carrying out step g with previously recorded data recorded in accordance with steps b, c, d, and e. 7. The method as set forth in claim 6 wherein the data resulting from carrying out steps d and e is recorded upon said card. 8. The method of claim 6 wherein at least one of said scales includes non-linearly spaced measuring markings. 9. The method as set forth in claim 8 wherein the data resulting from carrying out steps d and e is recorded upon said card. 10. A method of verifying the authenticity of an identification card having a fingerprint, including at least one fingerprint discontinuity, recorded thereon comprising the steps of: a. providing at least one digitizer having a base, fiducial means pivotably mounted to said base at a predetermined pivot point, an angular scale positioned upon said base adjacent said fiducial means and position referencing means for positioning said identification card at a precise predetermined position upon said base; b. positioning said identification card at said referencing means; c. rotating said fiducial means until said fiducial means coincides with said fingerprint discontinuity; d. recording the angle from said angular scale indicative of the angular position of said fiducial means rotated in accordance with step c; e. repositioning said identification card at said referencing means of a digitizer substantially identical to said at least one digitizer at a later time; f. repeating step c; g. comparing the data resulting from carrying out step f with previously recorded data recorded in accordance with steps b, c, and d. 11. The method as set forth in claim 10 wherein the data resulting from carrying out steps b, c and d is recorded upon said card. 12. The method as set forth in claim 10 wherein the data resulting from carrying out steps b, c and d is inserted into a data processor. 13. The method of claim 10 wherein said angular scale includes non-linearly spaced measuring markings.