JPH024360U - - Google Patents
Info
- Publication number
- JPH024360U JPH024360U JP8308988U JP8308988U JPH024360U JP H024360 U JPH024360 U JP H024360U JP 8308988 U JP8308988 U JP 8308988U JP 8308988 U JP8308988 U JP 8308988U JP H024360 U JPH024360 U JP H024360U
- Authority
- JP
- Japan
- Prior art keywords
- dither
- image
- dither signal
- reproducing device
- pixels constituting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Television Signal Processing For Recording (AREA)
- Facsimile Image Signal Circuits (AREA)
Description
第１図はこの考案の画像再生装置の一実施例で
あるビデオプリンタの階調処理回路の構成を示す
回路図、第２図はその動作を示すタイミング・チ
ヤート、第３図は原画の走査と画像再生時の走査
の手順を示す模式図、第４図はこのビデオプリン
タによつて１画素で表現される濃度の種類を示す
説明図、第５図および第６図はそれぞれ比較器３
Ａ，３Ｂ，３Ｃの出力信号ｇ，ｈ，ｉのレベルの
変化を示すタイミング・チヤート、第７図はこの
ビデオプリンタによつて階調表示の単位面積で表
現されるデイザパターンの種類を示す説明図であ
る。
３Ａ，３Ｂ，３Ｃ……比較器（デイザ信号選択
手段）、４……基準信号発生回路（デイザ信号発
生手段）、８……デイザ信号発生回路、１０Ａ，
１０Ｂ，１０Ｃ……加算器（デイザ信号発生手段
）。
Fig. 1 is a circuit diagram showing the configuration of a gradation processing circuit of a video printer which is an embodiment of the image reproducing device of this invention, Fig. 2 is a timing chart showing its operation, and Fig. 3 is a diagram showing the scanning and processing of an original image. A schematic diagram showing the scanning procedure during image reproduction, FIG. 4 is an explanatory diagram showing the types of density expressed by one pixel by this video printer, and FIGS. 5 and 6 respectively show the comparator 3.
A timing chart showing changes in the levels of output signals g, h, and i of A, 3B, and 3C, and FIG. 7 shows the types of dither patterns expressed by this video printer in a unit area of gradation display. It is an explanatory diagram. 3A, 3B, 3C...Comparator (dither signal selection means), 4...Reference signal generation circuit (dither signal generation means), 8...Dither signal generation circuit, 10A,
10B, 10C...Adder (dither signal generation means).
Claims (1)
現することのできる画像再生装置において、 再生画像を構成する画素の複数個を階調表示の
単位面積とし、その単位面積を構成する各画素を
選択的に２値の濃度のいずれかで表現するデイザ
パターンを作成するためのデイザ信号として、２
値の濃度をそれぞれ段階的に異ならせる数種類の
デイザ信号を発生するデイザ信号発生手段と、 入力される画素信号の信号レベルを数段階に弁
別し、その信号レベルに応じて前記数種類のデイ
ザ信号のうちから１つを選択するデイザ信号選択
手段と、 選択されたデイザ信号に応じたデイザパターン
の画像を再生する再生手段とを含むことを特徴と
する画像再生装置。[Claims for Utility Model Registration] In an image reproducing device capable of expressing pixels constituting a reproduced image in multiple levels of density, a plurality of pixels constituting the reproduced image is taken as a unit area of gradation display, and the unit is 2 as a dither signal to create a dither pattern that selectively expresses each pixel constituting the area with one of two binary densities.
A dither signal generating means for generating several types of dither signals each having a stepwise different value density; An image reproducing device comprising: dither signal selection means for selecting one of the dither signals; and reproduction means for reproducing an image of a dither pattern according to the selected dither signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8308988U JPH024360U (en) | 1988-06-22 | 1988-06-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8308988U JPH024360U (en) | 1988-06-22 | 1988-06-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH024360U true JPH024360U (en) | 1990-01-11 |
Family
ID=31307812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8308988U Pending JPH024360U (en) | 1988-06-22 | 1988-06-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH024360U (en) |
-
1988
- 1988-06-22 JP JP8308988U patent/JPH024360U/ja active Pending
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