Device for simultaneous creation and detection of markings

Details Device for simultaneous creation and detection of markings Device for simultaneous creation and detection of markings

1981-11-09

1984-10-02

Martin, John C.

Image analysis

Histogram processing

For setting a threshold

382 3, G06K 922, G06K 900

Patent

active

044752407

ABSTRACT:
Device for simultaneous generation and detection of markings (e.g. handwriting) comprising at least one marking member and at least one optical sensor, which is arranged to sense at least one optical property of the surface on which the marking is being made, the marking member being arranged to change said at least one property of the surface on which the marking is made, said optical sensor being arranged to sense the direction of said marking relative to the orientation of the device.

REFERENCES:
patent: 3182291 (1965-05-01), Nassimbene
patent: 3335287 (1967-08-01), Hargens
patent: 3473027 (1969-10-01), Freeman et al.
patent: 3576430 (1971-04-01), Fickensher
patent: 3801182 (1974-04-01), Jones
patent: 3912860 (1975-10-01), Sasabe et al.
patent: 4128829 (1978-12-01), Herbst
patent: 4202491 (1980-05-01), Suzuki
patent: 4279465 (1981-07-01), Vojvodich
IBM Technical Disclosure Bulletin, vol. 22, No. 8A, Jan. 1980, Bassetti et al.
IBM Technical Disclosure Bulletin, vol. 14, No. 4, Sep. 1971, Holdaway.

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