PURPOSE: To reproduce a stable gradation by arranging a picture element roughly in parallel and at an equal interval on a straight line group which is roughly in parallel to each other, dividing it into (n) pieces, and changing the number of outputs of the element or its arrangement by a gradation ratio of the picture element to the maximum value of the gradation by an aggregation of the element.
CONSTITUTION: In a high luminance part, namely, in a part where a microscopic picture element is scarcely dotted and an image density is low, the microscopic picture element is dispersed in the whole picture element. In the next density stage, the reference microscopic picture element is placed in the shape of plural straight lines which are parallel in one direction, and also have been arranged at an equal interval, and in the last density stage, plural pieces of large microscopic picture elements are placed. In this way, the linearity of gradation property and a density can be obtained, a straight line 60 close to an ideal straight line 61 is obtained, the reproducibility of the gradation in the high luminance part is improved further, and an image outputting system having stable gradation reproducibility is obtained at an area extending from the high luminance part to the low luminance part.
INOUE TAKAHIRO
SATO KOJI
SUZUKI AKIO
MURASAWA YOSHIHIRO
SASAME HIROSHI
ASAI ATSUSHI
| JPS59161977A | 1984-09-12 | |||
| JPS6030272A | 1985-02-15 | |||
| JPS5791074A | 1982-06-07 | |||
| JPS6054198A | 1985-03-28 | |||
| JPS6054199A | 1985-03-28 |