| 摘要 |
<p>This disclosure concerns to apparatus for reading drawings. The apparatus of this invention is an apparatus for reading symbols on a drawing (11) wherein the drawing comprises a preprinted lattice pattern with orthogonal lines forming unit rectangular areas and each symbol or portions thereof is drawn within one or more of the unit area. Each symbol is drawn so that the portion of the symbol within a unit area has a predetermined size and position with respect to the sides of the unit area.</p><p>The apparatus includes scanning means (14) for scanning several discrete points within each unit area and producing binary data for each scanned point, storage means for storing standard pattern data, identifying means (17), coupled to the storage means and the scanning means, for comparing the binary data with the pattern data to identify the symbol or symbol portion within the scanned unit area, the identifying means (17) producing a code representing the symbol or symbol portion when identity is established, detecting means (24,25) for detecting the position of the scanned unit area, and drawing storage means (19), coupled to the detecting means and the identifying means, for storing the code at an address defined by the detecting means (24, 25), the drawing storage means (19) storing a code for each unit area scanned by the scanning means.</p> |
