Communications: electrical – Digital comparator systems
Patent
1977-01-17
1978-08-22
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
3401463F, 351 7, G06K 900, A61B 310
Patent
active
041092376
ABSTRACT:
Method for identifying a person comprises obtaining his retinal vasculature intercept pattern by causing the person's eye to become fixated, scanning the fixated eye with a light source arranged in a selected pattern, and detecting that portion of the light source pattern which is reflected off of the person's retina, thereby locating each intercept of the light source pattern with a blood vessel. The intercept pattern thus obtained is stored for future recall and comparison with a subsequently obtained pattern for verifying identification of the person. The apparatus comprises a fixation light source for fixating the person's eye, a flying spot light source having 360 individual light-emitting diodes arranged in a dual concentric circular pattern and having a light source driver arranged for illuminating and then darkening each of the light-emitting diodes in a rapid sequential manner for scanning the eye, and a photodetector for detecting the reflected portion of the light source pattern. A digital computer activates the flying spot light source and the photodetector in synchronization, records and stores the intercept pattern thus obtained, and then compares the intercept pattern with a subsequently obtained pattern.
REFERENCES:
patent: 3050711 (1962-08-01), Harmon
patent: 3611290 (1971-10-01), Luisi et al.
patent: 3915564 (1975-10-01), Urban
Yokouchi et al., "Fundus Pattern Recognition", Computer & Control Abstracts, vol. 10, No. 106, Mar. 1975, p. 219, Abstract #3820.
Bausch & Lomb Optical Company, "Photography of the Human Retina", 1952.
Simon et al., "A New Scientific Method of Identification", New York State Journal of Medicine, vol. 35, No. 18, Sep. 1935, pp. 901-906.
Yamamoto et al., "Image Processing and Automatic Diagnosis of Color Fundus Photographs," 2nd Int. Joint Conf. on Pattern Rec: Copenhagen, pp. 268-269.
Boudreau Leo H.
Farley Eugene D.
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