Mark placing and canceling method and mark recognizing device

Details Mark placing and canceling method and mark recognizing device Mark placing and canceling method and mark recognizing device

1992-06-19

1993-08-10

Pendegrass, Joan H.

Image analysis

Histogram processing

For setting a threshold

235454, 434353, G06K 112, G06K 700

Patent

active

052356558

ABSTRACT:
A mark placing and canceling method, operating with a mark sheet provided with mark columns formed of closed areas demarcated with boundary lines, for entering a mark indicating a set-up of a control job in one of the mark columns, reading the mark sheet with a two-dimensional image reading device, and canceling the mark entered in the mark column on the mark sheet as recognized by means of a mark recognizing device. The mark placing and canceling method includes the steps of (a) entering a line forming a crossing point with the boundary line, as a mark for setting up a control job; and (b) entering a line forming new crossing points with the already entered line and with the boundary line, as a mark for canceling the set-up of the control job, in case the already entered mark is to be canceled.

REFERENCES:
patent: 3086300 (1963-04-01), Rugland et al.
patent: 3558859 (1971-01-01), Dilsner et al.
patent: 4153895 (1979-05-01), Weisbrod et al.
patent: 4248528 (1981-02-01), Sahay

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