Line differentiation pattern dictionary

Abstract

Abstract PURPOSE:To compress segment pattern data which becomes necessary in a high-speed polygonal approximation by reversing the later direction of travel from right to left when necessary and expressing a shape of two segment patterns with the data for one piece, in accordance with the direction of travel at the first crossover point. CONSTITUTION:A control part 100 controls a flow of the necessary processing to respective parts and an area characteristic is extracted by an area characteristic extracting 110 and an area characteristic memory 111. Here, a segment pattern is expressed by a two-dimensional arrangement of 3Xn, and this is stored in a memory 115 as pattern data. The second attached letter value of arrangement corresponds to an n number of points on a segment pattern expressed by a point row and the first attached letter corresponds to three directions of travel in respective points, namely, turning to the left, going straight and turning to the right. A flag, which shows with on and off that to compress a shaft symmetrical pattern, the point row is already turned to the right or to the left or continues to go straight only, is installed, and by limiting the direction turned first to one side, only one side of shaft symmetrical patterns is made and the data are compressed to half.

Inventors

• 👤 Kenji Suzuki
• 👤 健司 鈴木
• 👤 Seiji Hata
• 👤 清治 秦
• 👤 Yukiro Tsuji
• 👤 辻　征郎

Bibliographic Details