公开(公告)号：CA1089988A

公开(公告)日：1980-11-18

申请号：CA290070

申请日：1977-11-02

Applicant: IBM

Inventor： EVANS JOHN M ,  JUDD IAN D ,  LOVIE RICHARD H ,  MINSHULL JOHN F

IPC: H04N5/262 ,  G06K9/54 ,  G06T3/00 ,  G06T9/20 ,  G06T11/20 ,  G09G5/36 ,  H04N1/411 ,  H03K13/02 ,  G06F3/05

Abstract: Graphical data on a document is raster scanned and the resulting bit pattern is processed to provide a processes-bit-pattern which represents single-pel-wide lines indicative of the shapes of objects scanned on the document. These single-pel-wide lines may represent the outlines of objects on the centre lines. The processed bit pattern is then passed to a line follower in which bits representing contiguous pels are detected and tested for linearity. When contiguous pels fall the linearity test, a new vector is started and the vector being tracked is terminated. Hardware for performing these operations is described. The resulting vector list is stored until needed for display etc. Optionally a display station can be used to correct faulty vectors or to encode alphanumeric data in a more convenient format than vector coding.

公开(公告)号：FR2374780A1

公开(公告)日：1978-07-13

申请号：FR7734670

申请日：1977-11-10

Applicant: IBM

Inventor： EVANS JOHN M ,  LOVIE RICHARD H ,  JUDD IAN D ,  MINSHULL JOHN F

IPC: H04N5/262 ,  G06K9/54 ,  G06T3/00 ,  G06T9/20 ,  G06T11/20 ,  G09G5/36 ,  H04N1/411 ,  H03K13/24 ,  G06K9/00

Abstract: Graphical data on a document is raster scanned and the resulting bit pattern is processed to provide a processed bit pattern which represents lines which each are a single pel in width and indicative of the shapes of objects scanned on the document. These single pel wide lines may represent the outlines of objects on the center lines. The processed bit pattern is then directed to a line follower in which bits representing contiguous pels are detected and tested for linearity. When contiguous pels fail the linearity test, a new vector is started and the vector being tracked is terminated. Hardware for performing these operations is described. The resulting vector list is stored until needed for display. Optionally a display station can be used to correct faulty vectors or to encode alphanumeric data in a more convenient format than vector coding.