Communications: electrical – Digital comparator systems
Patent
1978-05-02
1981-10-20
Boudreau, Leo H.
Communications: electrical
Digital comparator systems
131105, 131290, G06K 900, A24C 100
Patent
active
042964059
ABSTRACT:
There is provided a device for converting a succession of analog voltage signals representative of light intensity of light from and controlled by a corresponding succession of finite surface locations of a natural leaf into high or white, low or black and intermediate or gray digital signals. This device includes an arrangement for creating a white digital signal when the analog voltage of a given location exceeds the threshold voltage. The digital signals are continuously averaged and updated to provide a datum voltage against which the analog voltage is compared after the datum voltage is decreased by a preselected amount. If the analog voltage is less than the reduced datum voltage, a black digital signal is created. If there is neither a black nor a white digital signal, a gray digital signal is created. In this manner, the general light intensity characteristics of each successive location on the leaf can be recorded as either white, black or gray. This device and its method of operation is useful in creating a profile of the actual natural tobacco leaf for a subsequent use in cutting profiles from the leaf at desired areas.
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patent: 3818223 (1974-06-01), Gibson et al.
patent: 3944977 (1976-03-01), Holmes et al.
patent: 3973239 (1976-08-01), Kakumoto et al.
patent: 4094325 (1978-06-01), Stoffers et al.
patent: 4109211 (1978-08-01), Mese et al.
Siverling, "Video Thresholding for Photodetector Arrays", IBM Tech. Disclosure Bulletin, vol. 16, No. 5, Oct., 1973, pp. 1569-1570.
Boudreau Leo H.
Gulf & Western Corporation
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