JPH0161742U - - Google Patents
Info
- Publication number
- JPH0161742U JPH0161742U JP15560187U JP15560187U JPH0161742U JP H0161742 U JPH0161742 U JP H0161742U JP 15560187 U JP15560187 U JP 15560187U JP 15560187 U JP15560187 U JP 15560187U JP H0161742 U JPH0161742 U JP H0161742U
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- image memory
- generation circuit
- comparison
- address
- 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
- 238000000034 method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 1
- VVNRQZDDMYBBJY-UHFFFAOYSA-M sodium 1-[(1-sulfonaphthalen-2-yl)diazenyl]naphthalen-2-olate Chemical compound [Na+].C1=CC=CC2=C(S([O-])(=O)=O)C(N=NC3=C4C=CC=CC4=CC=C3O)=CC=C21 VVNRQZDDMYBBJY-UHFFFAOYSA-M 0.000 description 1
Landscapes
- Digital Computer Display Output (AREA)
Description
第１図は一実施例のカラーハードコピー装置の
ブロツク図、第２図ａ，ｂは同実施例装置の画像
メモリへの濃度階調を表わすデジタルコードの書
き込みの状況を示す図、第３図は従来のカラーハ
ードコピー装置のブロツク図である。
１……ビデオ信号赤入力、２……ビデオ信号緑
入力、３……ビデオ信号青入力、４……比較回路
としてのフロントエンド、５……Ｄ／Ａ変換器、
６……アナログしきい値電圧、７……制御部、８
……２値化された赤ビデオ信号、９……２値化さ
れた緑ビデオ信号、１０……２値化された青ビデ
オ信号、１１〜１３……書き込み回路としての第
１〜第３のＷ／Ｒ信号発生器、１４……濃度コー
ド生成回路、１５……濃度階調を表わすデジタル
コード、１６……アドレス発生回路としてのアド
レスコントローラ、１７……画像メモリとしての
Ｒメモリ、１８……画像メモリとしてのＧメモリ
、１９……画像メモリとしてのＢメモリ、２０…
…印字手段としてのＲＧＢ／ＹＭＣ変換回路、２
１……印字手段としての疑似階調処理回路、２２
……印字手段としての印刷部。
FIG. 1 is a block diagram of a color hard copy device according to an embodiment, FIGS. 2a and 2b are diagrams showing how digital codes representing density gradations are written into the image memory of the same embodiment, and FIG. 3 1 is a block diagram of a conventional color hard copy device. 1... Video signal red input, 2... Video signal green input, 3... Video signal blue input, 4... Front end as comparison circuit, 5... D/A converter,
6...Analog threshold voltage, 7...Control unit, 8
...Binarized red video signal, 9...Binarized green video signal, 10...Binarized blue video signal, 11-13...1st to 3rd as a writing circuit W/R signal generator, 14...Density code generation circuit, 15...Digital code representing density gradation, 16...Address controller as address generation circuit, 17...R memory as image memory, 18... G memory as image memory, 19...B memory as image memory, 20...
...RGB/YMC conversion circuit as printing means, 2
1...Pseudo gradation processing circuit as printing means, 22
...Printing section as a printing means.
Claims (1)
カラービデオ画像信号を、しきい値と比較する比
較回路と、同比較回路の比較結果を記憶する画像
メモリと、前記画像メモリの前記カラービデオ画
像の位置に対応したアドレスを指示する信号を発
生するアドレス発生回路と、前記の比較回路の比
較結果を前記アドレス発生回路で指示された画像
メモリアドレスに書き込む書き込み手段と、多色
階調画像の表現方法に基づき前記画像メモリより
記憶データを読みだし印字する印字手段とを有す
るカラーハードコピー装置において、前記しきい
値に対応したデジタルコードを生成する濃度コー
ド生成回路と、前記比較回路の比較結果が所定の
状態であるとき前記濃度コード生成回路で生成し
たデジタルコードを前記アドレス発生回路で指示
されたアドレスの前記画像メモリに書き込む書き
込み回路と、前記しきい値を単調に増加／減少さ
せた後に再度前記の比較回路と画像メモリとアド
レス発生回路と書き込み回路とを動作させること
を所定回数行う制御部とが設けられたことを特徴
とするカラーハードコピー装置。 A comparison circuit that compares a color video image signal consisting of R (red), G (green), and B (blue) signals with a threshold value, an image memory that stores the comparison results of the comparison circuit, and the image memory. an address generation circuit for generating a signal instructing an address corresponding to a position of the color video image; a writing means for writing a comparison result of the comparison circuit into an image memory address specified by the address generation circuit; In a color hard copy apparatus, the color hard copy apparatus includes a printing means for reading and printing stored data from the image memory based on a method of representing a gradation image, and a density code generation circuit for generating a digital code corresponding to the threshold value; a write circuit for writing a digital code generated by the density code generation circuit into the image memory at an address specified by the address generation circuit when a comparison result of the circuit is in a predetermined state; and a write circuit for monotonically increasing the threshold value. 1. A color hard copy apparatus, comprising: a control section that operates the comparison circuit, image memory, address generation circuit, and write circuit again a predetermined number of times after the reduction in the number of pixels.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15560187U JPH0161742U (en) | 1987-10-13 | 1987-10-13 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15560187U JPH0161742U (en) | 1987-10-13 | 1987-10-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0161742U true JPH0161742U (en) | 1989-04-19 |
Family
ID=31433374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15560187U Pending JPH0161742U (en) | 1987-10-13 | 1987-10-13 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0161742U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61187035A (en) * | 1985-02-14 | 1986-08-20 | Fujitsu Ltd | Color information transmitting system for color gard copy device |
-
1987
- 1987-10-13 JP JP15560187U patent/JPH0161742U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61187035A (en) * | 1985-02-14 | 1986-08-20 | Fujitsu Ltd | Color information transmitting system for color gard copy device |
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