Method and apparatus for reducing graphic patterns

US4447882A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventor

• Joachim Walz · Köngen, DE

Key dates

• Filing date: Jul 20, 1981
• Grant date: May 8, 1984
• Expiry date: Jul 20, 2001

Classification

• Technology area (CPC G): Physics
• CPC primary: G06T3/40
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method and apparatus are disclosed for reducing graphic patterns, coded by binary characters and represented in rows and columns of a prescribed grid, by purely electronic techniques. The reduction occurs by decrement of the binary characters. First, the binary characters representing the rows and, subsequently, the binary characters representing the columns are decremented in accordance with the desired reduction ratio. In the decrement of the binary characters, it is seen that the structure of the graphic patterns is retained to as great an extent as possible.