光ディスクと画像符号化技術の実用化は映像の蓄積利用を可能にし, コンピュータの高速化とマルチメディア化は, 別々であった画像検索装置と表示装置を1台のコンピュータ上に実現する.ハードウェアの進展と共に, 検索技術も利用者の意図を反映させる手法が提案され, その応用は文書画像, 図形や医療画像からマルチメディアや映像編集へも展開を始めている.

抄録全体を表示

Employing tri-state switching elements enables the double-throw switching of the display and undisplay of a two-feeder system, the simplification of the display circuit and an increase in the number of display elements. Also, by connecting a double-throw zenor diode in series with the electromagnetic coil of the display element, it is possible to suppress the motion of unselected display elements due to crosstalk.
The ability to equivalently convert any n×m display matrix into a 2×2 display matrix and to analyze the V-I characteristic using a simple circuit is shown. In addition, the performing of a line or block operation of the display motion within the allowable current limit for a tri-state switching element is experimentally presented. The experimental results from the designed 2×2.2 cm² panel, with a 40 ms display motion, agree well with the theoretical results. As a result, the number of display panel elements are estimated at about a hundred thousand.

抄録全体を表示

An axially symmetric non-uniform electric field is produced in a liquid crystal cell with a hole-pattern electrode structure, and a lens-like property ; that is, a liquid crystal microlens is created by the molecular orientation effects in the non-uniform electric field. This lens-like property can be widely changed by varying the applied voltage, and the focal length of this liquid crystal microlens is so short that light scattering properties are obtained. A scattering type of display device can be attained by fabricating a number of microlenses in a cell. By arranging the liquid crystal microlenses randomly, interference effects can be eliminated and the quality of images observed through the liquid crystal cell is greatly improved, compared to a well-ordered microlens array.

抄録全体を表示

不連続性雑音が定周期とランダムに発生する場合を取り上げ,テレビ画像への妨害について主観評価実験を行った.その結果,周期的に発生する場合では発生頻度10s^-1付近で評価値が向上しており,ランダムに発生する場合に比べて評価値が全体的に高く,両者の影響に違いがあった.

抄録全体を表示

1枚の画像の各画像の座標を, 直角座標から極座標へ簡単かつ高速に変換する手法を提案する.主な演算は加算だけであり, 乗算はすべてシフト演算に置き換えられる.また, 必要に応じて精度を高めることができ, 高速性と高精度の両方を同時に実現する.

抄録全体を表示