Dot forming method

Abstract

Abstract PURPOSE:To obtain a picture whose lattice pattern is not noticeable in a highlighted part and a shadow part of a dot picture by setting the proportion of the plural picture elements in said two parts larger than that in an intermediate gradation part. CONSTITUTION:When a first dot or initial nine in a 16X16 matrix is or are black picture element(s), a cycle of a length (a) occurs horizontally and vertically. When a fourth one or initial twelve becomes or become black one or ones, a cycle of a length of a/2 in the same directions occurs. Other than the proper cycle of dots which has a length of a/2sq. rt. 2 in the direction angled by 45 deg. from the horizontal direction, these cycles cause the lattice pattern to become noticeable. When the initial ten dots are black picture elements, the cycle is in the direction at 45 deg. and of a length of a/2<1/2>, making the pattern less noticeable. The above is the same with white picture elements. By making the proportion of the plural picture elements in the highlighted part and the shadow part the more larger than that of the intermediate gradation part the farther apart the formers are from the latter, a dot picture whose lattice pattern is not noticeable is obtained.

Inventors

• 👤 Yuichi Akanabe
• 👤 祐一 茜部
• 👤 Masayuki Inouchi
• 👤 井内　正行

Bibliographic Details