Microscan MS-96 Uživatelský manuál stáhnout pdf (Strana 104)

OMR Definitions

7-4 MS-9 Scanner User’s Manual

OMR Definitions

OMR. Symbology that is composed of a series of fields (or “placeholders”) of uniform

width that are either empty or contain a mark (a bar also of uniform width) in their cen

ters. A cell with a mark is equivalent to a binary 1, an empty cell is represented by a

binary 0. Typical OMR symbols contain from 8 to 32 fields.

Gate Bar. The first bar in the OMR symbol relates to the decoding direction.

Cell. (Sometimes referred to as a “field.”) The area in which a mark is present or

absent. The cell is wider than the mark.

Bar or Mark. A bar which can be present inside a cell.

Test Pattern. OMR symbol used to calibrate the scanner during initial setup.

The sketch above shows a 9 cell OMR symbol with 9 bars. The dashed outline of the

fields serves as a visual demonstration and is not visible when printed. The first cell

always contains a gate bar which serves to locate the symbol. The last cell can contain

a parity bar.

OMR Test Symbol

Bars (marks)

9 Cells (not visible)

Cell

width

Bar width

Gate bar

Bar height

1 2 ... 99 100 101 102 103 104 105 106 107 108 109 ... 225 226

Žádné komentáře

Microscan MS-96 Uživatelský manuál Strana 104