JPH0339264A - Printer device - Google Patents

Printer device

Info

Publication number
JPH0339264A
JPH0339264A JP1174743A JP17474389A JPH0339264A JP H0339264 A JPH0339264 A JP H0339264A JP 1174743 A JP1174743 A JP 1174743A JP 17474389 A JP17474389 A JP 17474389A JP H0339264 A JPH0339264 A JP H0339264A
Authority
JP
Japan
Prior art keywords
signal
color difference
difference signal
rgb
level
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.)
Granted
Application number
JP1174743A
Other languages
Japanese (ja)
Other versions
JP2692278B2 (en
Inventor
Yoichi Murakami
洋一 村上
Kin Nishikawa
欣 西川
Yoshitada Kitagawa
北川 喜督
Masahiro Nakamura
昌弘 中村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP1174743A priority Critical patent/JP2692278B2/en
Publication of JPH0339264A publication Critical patent/JPH0339264A/en
Application granted granted Critical
Publication of JP2692278B2 publication Critical patent/JP2692278B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Electronic Switches (AREA)
  • Color, Gradation (AREA)
  • Dot-Matrix Printers And Others (AREA)

Abstract

PURPOSE:To suppress an overloading of color at a white part to conduct a bright printing by providing a correction factor forming means for lowering a color difference signal in the vicinity of a dot receiving a luminance signal of a white level in accordance with this level and a multiplicator for multiplying a correction factor formed by said forming means by the color difference signal. CONSTITUTION:In the vicinity of a dot receiving a luminance signal of a white level that has been A/D converted by an A/D converter 2, a color difference signal is lowered by a correction factor forming means 3 in accordance with this level. A multiplicator 4 multiplies a correction factor formed by said forming means 3 by the color difference signal demodulated by a decoder 1. A color difference signal outputted from the multiplicator 4 is added to the luminance signal by a RGB forming means 5 to form a RGB signal. After that, a pulse to be applied to a thermal head 7 is formed by a pulse generation means 6 in accordance with the RGB signal. This pulse is applied to the thermal head 7 to conduct a desired bright printing.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は主にテレビ画面等の画像情報を記録するプリン
タ装置に関するものである。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention mainly relates to a printer device for recording image information such as a television screen.

従来の技術 近年、映像機器のハードコピーを取るカラービ7″ヤプ
リンタは、コンピュータ雨像処理の出力や報道などの業
務用だけではなく、TVやVTRなどの映像機器のハー
ドコピー装置及び電子スチルカメラの出力装置として家
庭用にも普及しはじめている。また、高画質化に伴い、
熱昇華形のプリンタ装置が主流になりつつあり、特に色
再現性。
BACKGROUND OF THE INVENTION In recent years, color printers for making hard copies of video equipment have been used not only for business purposes such as computer rain image processing output and reporting, but also for hard copy equipment for video equipment such as TVs and VTRs, and for electronic still cameras. It is beginning to become popular for home use as an output device.Also, with the increase in image quality,
Heat dye sublimation printers are becoming mainstream, especially when it comes to color reproducibility.

階調性、解像度は重要な要素となっている。Gradation and resolution are important factors.

以下、図面を参照しながら、上述した従来のプリンタ装
置の一例について説明する。
An example of the conventional printer device described above will be described below with reference to the drawings.

第3図は従来のプリンタ装置の信号処理のブロック図で
ある。第3図において、1は搬送色信号を復調するデコ
ーダ、2はA/D変換器、5はデコーダ1の出力信号と
輝度信号を加算しRGB信号を作成するRGB作成手段
、6はRGB信号から補色変換しサーマルヘッドへの印
加パルスを作成するパルス発生手段、7は前記パルス発
生手段6の出力信号を熱エネルギーに変換するサーマル
ヘッドである。
FIG. 3 is a block diagram of signal processing of a conventional printer device. In FIG. 3, 1 is a decoder that demodulates the carrier color signal, 2 is an A/D converter, 5 is RGB creation means that adds the output signal of decoder 1 and the luminance signal to create an RGB signal, and 6 is an RGB signal. Pulse generating means performs complementary color conversion and creates pulses to be applied to the thermal head. Reference numeral 7 denotes a thermal head that converts the output signal of the pulse generating means 6 into thermal energy.

以1−のように構成された従来のプリンタ装置について
、その動作を説明する。
The operation of the conventional printer device configured as described in 1- above will be explained.

まず、入力された映像信号がコンポジット信号であれば
、あらかじめ輝度信号と搬送色信号とに分離して各々第
3図の入力端に与える。そこで、搬送色信号がデコーダ
1に入力され、色差信号が出力され、前記色差信号と輝
度信号を加算するごとによりRGB信号が作られる。こ
の時、出力画像の味付けをする為の色相(ティント)1
色の濃さ(カラー)、明るさ(ブライト)、コントラス
ト、画質(シャープネル)を可変できるようにするのは
TVの場合と同様である。このRGB作成回路5の出力
信号をA/D変換器2でA / D変換し、パルス発生
手段6に入力する。パルス発生手段6では、RGB信号
から、Y(イエロー)1M(マゼンタ)、C(シアン)
という補色に変換し、。
First, if the input video signal is a composite signal, it is separated into a luminance signal and a carrier color signal in advance and each is applied to the input terminal in FIG. Therefore, a carrier color signal is input to the decoder 1, a color difference signal is output, and an RGB signal is created by adding the color difference signal and the luminance signal. At this time, hue (tint) 1 is used to season the output image.
Similar to the case of TV, the color depth, brightness, contrast, and image quality (sharpness) can be varied. The output signal of this RGB generating circuit 5 is A/D converted by an A/D converter 2 and inputted to a pulse generating means 6. The pulse generating means 6 generates Y (yellow), 1M (magenta), and C (cyan) from the RGB signals.
Convert it to a complementary color called .

その出力に応じてナーマル・\ラドに印加するパルスを
作成する。この時、TVのブラウン管の特性や、熱昇華
されるYMC3色のインクシー1の特性や、サーマルヘ
ッドの温度特性をも考慮してパルスを作成することも可
能である。前記のパルス発生手段により発生させたパル
スをサーマルヘッド 7ニ印加し、サーマルヘッド7に
より印加パルスが熱エネルギーに変換され、YMCa色
のインクシートのインクが昇華し、受像紙に転写され、
フルカラーのプリント画ができあがる。
Create a pulse to be applied to Nermal/rad according to the output. At this time, it is also possible to create pulses by taking into account the characteristics of the TV's cathode ray tube, the characteristics of YMC three-color Inksey 1 that is thermally sublimated, and the temperature characteristics of the thermal head. The pulses generated by the pulse generating means are applied to the thermal head 7, and the applied pulses are converted into thermal energy by the thermal head 7, and the ink on the YMCa color ink sheet is sublimated and transferred to the image receiving paper.
A full-color print is created.

発明が解決しようとする課題 このような従来のプリンタ装置はブラウン管に表示する
ための映像信号に基づいてYMCの3色の信号を発生さ
せている。しかし、ブラウン管とプリント画とではダイ
ナミックレンジに差があるためメリハリが悪く、特に明
るい部分での色が付き過ぎ、色再現性に問題があるとい
う欠点があった。
Problems to be Solved by the Invention Such a conventional printer device generates three color signals of YMC based on a video signal to be displayed on a cathode ray tube. However, due to the difference in dynamic range between cathode ray tubes and printed images, there was a problem with poor sharpness, especially in bright areas, which caused problems with color reproducibility.

本発明は上記問題点に鑑み、輝度信号のレベルに合わせ
て色差信号のレベルを可変することにより、明るい部分
での色信号を抑えるようにし、より明るく見せ、一方、
暗い部分では人間の視覚に合わせ色信号を抑えることに
より暗さを強調して、プリント画のダイナミックレンジ
を広げて見せるようにしたプリンタ装置を提供するもの
である。
In view of the above problems, the present invention suppresses the color signal in bright areas by varying the level of the color difference signal in accordance with the level of the luminance signal, thereby making the area appear brighter.
To provide a printer device that emphasizes darkness by suppressing color signals in accordance with human visual perception in dark areas, and widens the dynamic range of a printed image.

課題を解決するための手段 本願の請求項1の発明は搬送色信号を復調するデコーダ
と、輝度信号と前記デコーダにより復調された色差信号
とをA/D変換するA/D変換器と、前記A/D変換器
によりA/D変換された輝度信号が白レベルの近傍では
そのレベルに応じて色差信号を低下させる補正係数作成
手段と、前記補正係数作成手段により作成された補正係
数と色差信号とを乗算する乗算器と、前記乗W、器によ
り出力された色差信号と輝度信号とを加算してR,G 
B信号を作るRGB作成手段と、前記RGB信号からサ
ーマルヘッドへの印加パルスを作成するパルス発生手段
と、前記パルスを加えるサーマルヘッドとを具備したこ
とを特徴とするものである。
Means for Solving the Problems The invention according to claim 1 of the present application includes: a decoder for demodulating a carrier color signal; an A/D converter for A/D converting a luminance signal and a color difference signal demodulated by the decoder; correction coefficient creation means for reducing a color difference signal in accordance with the level of a luminance signal A/D converted by an A/D converter near a white level; and a correction coefficient and color difference signal created by the correction coefficient creation means. A multiplier that multiplies R, G by adding the color difference signal and the luminance signal output from the multiplier
The apparatus is characterized in that it includes an RGB generating means for generating a B signal, a pulse generating means for generating a pulse to be applied to a thermal head from the RGB signal, and a thermal head for applying the pulse.

また、本願の請求項2の発明は、補正係数作成手段の補
正係数を輝度信号が黒レベルの近傍ではそのレベルに応
じて色差信号を低下させるようにしたものである。
Further, in the invention of claim 2 of the present application, the correction coefficient of the correction coefficient generating means is such that when the luminance signal is near the black level, the color difference signal is reduced in accordance with the level.

作用 本願の請求項1の発明は上記した構成によって、色差信
号が輝度信号のレベルに応じて補正されることになり、
輝度の明るい部分では色の付き過ぎを抑え、より明るく
見せるようにしている。また、請求項2の発明では輝度
の暗い部分では人間の視覚に合わせ色信号を抑えること
により暗さを強調するようにしている。
Effect The invention of claim 1 of the present application has the above-described configuration, whereby the color difference signal is corrected according to the level of the luminance signal,
In bright areas, excessive coloring is suppressed to make the image appear brighter. Furthermore, in the second aspect of the invention, darkness is emphasized by suppressing color signals in accordance with human vision in areas with low brightness.

実施例 以下、本発明の実施例のプリンタ装置について、図面を
参照しながら説明する。
Embodiments Hereinafter, printer apparatuses according to embodiments of the present invention will be described with reference to the drawings.

第1図は本発明の実施例の信号処理のブロック図である
。第1図において、従来例と同様に1はデコーダ、6は
パルス発生手段、7はサーマルヘッドである。2は輝度
信号とデコーダ2からの色差信号をA/D変換するA/
D変換器である。3は輝度信号レベルに応じて色差信号
を補正する補正係数Kを発生する補正係数作成手段であ
り、例えばROMや演算回路等により実現される。4は
前記補正係数作成手段3により作成された補正係数と色
差信号とを乗算する乗算器である。5は前記乗算器4に
より出力された色差信号と輝度信号とを加算してRGB
を作るRGB作成手段である。
FIG. 1 is a block diagram of signal processing according to an embodiment of the present invention. In FIG. 1, as in the conventional example, 1 is a decoder, 6 is a pulse generating means, and 7 is a thermal head. 2 is an A/D converter for A/D converting the luminance signal and the color difference signal from the decoder 2;
It is a D converter. Reference numeral 3 denotes a correction coefficient generating means for generating a correction coefficient K for correcting the color difference signal according to the luminance signal level, and is realized by, for example, a ROM or an arithmetic circuit. 4 is a multiplier that multiplies the correction coefficient created by the correction coefficient creation means 3 and the color difference signal. 5 adds the color difference signal and luminance signal output from the multiplier 4 to produce RGB
This is an RGB creation means for creating.

以上のように構成されたプリンタ装置について、以下、
第1図及び第2図を用いて、その動作を具体的に説明す
る。第2図は輝度信号と補正係数との関係の一例を示す
ものであり、輝度信号が最低レヘル、すなわちペデスタ
ルレベルを01 aKレベル、すなわち白レベルを1と
した時、下記のような関係式になっている。
Regarding the printer device configured as above, the following is as follows.
The operation will be specifically explained using FIGS. 1 and 2. Figure 2 shows an example of the relationship between the brightness signal and the correction coefficient. When the brightness signal is at the lowest level, that is, the pedestal level is 01, and the aK level, that is, the white level is 1, the following relational expression is obtained. It has become.

K: 五−Y(1−Y了       ・・・(1)た
だし、K:補正係数、Y:輝度信号レベルこのようにし
て得られた補正係数Kを色差信号と乗算することにより
、輝度信号Yが0.9の場合、補正係数は0.6となり
、色差信号は60%に抑えられる。また、輝度信号が0
.1の場合も同様にして色差信号は60%に抑えられる
K: 5-Y (1-Y completed...(1) where K: correction coefficient, Y: luminance signal level By multiplying the correction coefficient K thus obtained by the color difference signal, the luminance signal Y is 0.9, the correction coefficient is 0.6, and the color difference signal is suppressed to 60%.Also, when the luminance signal is 0.
.. In the case of 1, the color difference signal is similarly suppressed to 60%.

上記のように本実施例によれば、輝度信号レベルに応じ
て色差信号レベルを補正することにより、輝度の明るい
部分では色の付き過ぎを抑え、より明るく見せ、輝度の
暗い部分では暗さを強調し、中間の輝度部分では忠実な
色再現を行うことができる。
As described above, according to this embodiment, by correcting the color difference signal level according to the luminance signal level, excessive coloring is suppressed in bright areas, making the area appear brighter, and darkness is reduced in dark areas. It is possible to emphasize and faithfully reproduce colors in intermediate brightness areas.

なお、本実施例では(1)式のよろな補正係数を用いた
が、この式に限定されるものではない。例えば第2図(
b)のように輝度信号YがO及び1付近、すなわち黒及
び白付近に限定して補正し、画面の暗い部分の黒の強調
及び白の彩度向上が実現できる。
Note that although various correction coefficients in equation (1) are used in this embodiment, the present invention is not limited to this equation. For example, Figure 2 (
As shown in b), the luminance signal Y is corrected only in the vicinity of O and 1, that is, in the vicinity of black and white, thereby emphasizing black in dark areas of the screen and improving the saturation of white.

一方、TVでは色温度として、輝度が高く色の薄い部分
の色相を黄・赤系からシアン・青果に移動させ、白をよ
り彩やかな白に見せている。ところがプリンタでは白は
紙面の濃度に固定されてしまう。この部分を補正する為
には第2図(C)のように輝度信号Yが1付近のみの色
信号を抑制し、白の彩度を上げることが可能である。第
2図(C)を逆にして黒レベルのみを補正するようにし
てもよい。
On the other hand, in TVs, the color temperature of areas with high brightness and light colors is shifted from yellow and red to cyan and fruit and vegetables, making white appear more colorful. However, with a printer, white is fixed to the density of the paper surface. In order to correct this part, it is possible to suppress the color signal where the luminance signal Y is only around 1 and increase the saturation of white, as shown in FIG. 2(C). The arrangement shown in FIG. 2(C) may be reversed to correct only the black level.

このように黒レベル付近の色信号を抑制することにより
プリント画の黒レベル補正、白レベル付近の色信号を抑
制することにより白レベル彩度向上を行うことが可能と
なる。なお、上記で示した補正係数の曲線については、
実際の実験を通して最適な係数に設定すればよい。
In this way, by suppressing color signals near the black level, it is possible to correct the black level of a print image, and by suppressing color signals near the white level, it is possible to improve the white level and saturation. Regarding the correction coefficient curve shown above,
The optimum coefficients can be set through actual experiments.

発明の効果 そのため本願の請求項1の発明では、白部分では色の付
き過ぎが抑えられより明るく印字することができる。ま
た、本願の請求項2の発明では暗い部分では視覚に合わ
せて色信号を抑えることによって暗さが強調されること
となる。従って全体としてダイナミックレンジが広く色
再現性のよいプリント画を得るこ゛とが可能となる。
Effects of the Invention Therefore, according to the invention of claim 1 of the present application, excessive coloring can be suppressed in white areas, and brighter printing can be achieved. Furthermore, in the invention of claim 2 of the present application, in dark areas, the darkness is emphasized by suppressing the color signal in accordance with the visual sense. Therefore, it is possible to obtain a print image with a wide dynamic range and good color reproducibility as a whole.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の実施例によるプリンタ装置のプリンタ
装置のブロック図である。 1・・・デコーダ、  2・・・A/D変換器、  3
・・・補正係数作成手段、  4・・・乗算器、  5
・・・RGB作成手段、  8・・・パルス発生手段、
  7・・・サーマルヘッド。
FIG. 1 is a block diagram of a printer device according to an embodiment of the present invention. 1... Decoder, 2... A/D converter, 3
... Correction coefficient creation means, 4... Multiplier, 5
... RGB creation means, 8... Pulse generation means,
7...Thermal head.

Claims (2)

【特許請求の範囲】[Claims] (1)搬送色信号を復調するデコーダと、 輝度信号と前記デコーダにより復調された色差信号とを
A/D変換するA/D変換器と、 前記A/D変換器によりA/D変換された輝度信号が白
レベルの近傍ではそのレベルに応じて色差信号を低下さ
せる補正係数作成手段と、 前記補正係数作成手段により作成された補正係数と色差
信号とを乗算する乗算器と、 前記乗算器により出力された色差信号と輝度信号とを加
算してRGB信号を作るRGB作成手段と、 前記RGB信号からサーマルヘッドへの印加パルスを作
成するパルス発生手段と、 前記パルスを加えるサーマルヘッドとを具備したことを
特徴とするプリンタ装置。
(1) a decoder that demodulates a carrier color signal; an A/D converter that performs A/D conversion on a luminance signal and a color difference signal demodulated by the decoder; correction coefficient creation means for reducing the color difference signal in accordance with the level of the luminance signal near the white level; a multiplier for multiplying the color difference signal by the correction coefficient created by the correction coefficient creation means; and the multiplier. The apparatus comprises: an RGB generating means for generating an RGB signal by adding the output color difference signal and a luminance signal; a pulse generating means for generating a pulse to be applied to the thermal head from the RGB signal; and a thermal head for applying the pulse. A printer device characterized by:
(2)搬送色信号を復調するデコーダと、 輝度信号と前記デコーダにより復調された色差信号とを
A/D変換するA/D変換器と、 前記A/D変換器によりA/D変換された輝度信号が黒
レベルの近傍ではそのレベルに応じて色差信号を低下さ
せる補正係数作成手段と、 前記補正係数作成手段により作成された補正係数と色差
信号とを乗算する乗算器と、 前記乗算器により出力された色差信号と輝度浸透とを加
算してRGB信号を作るRGB作成手段と、 前記RGB信号からサーマルヘッドへの印加パルスを作
成するパルス発生手段と、 前記パルスを加えるサーマルヘッドとを具備したことを
特徴とするプリンタ装置。
(2) a decoder that demodulates the carrier color signal; an A/D converter that performs A/D conversion of the luminance signal and the color difference signal demodulated by the decoder; correction coefficient creation means for reducing the color difference signal in accordance with the level of the luminance signal near the black level; a multiplier for multiplying the color difference signal by the correction coefficient created by the correction coefficient creation means; The apparatus comprises: an RGB generating means for generating an RGB signal by adding the output color difference signal and luminance penetration; a pulse generating means for generating a pulse to be applied to the thermal head from the RGB signal; and a thermal head for applying the pulse. A printer device characterized by:
JP1174743A 1989-07-06 1989-07-06 Printer device Expired - Lifetime JP2692278B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1174743A JP2692278B2 (en) 1989-07-06 1989-07-06 Printer device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1174743A JP2692278B2 (en) 1989-07-06 1989-07-06 Printer device

Publications (2)

Publication Number Publication Date
JPH0339264A true JPH0339264A (en) 1991-02-20
JP2692278B2 JP2692278B2 (en) 1997-12-17

Family

ID=15983903

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1174743A Expired - Lifetime JP2692278B2 (en) 1989-07-06 1989-07-06 Printer device

Country Status (1)

Country Link
JP (1) JP2692278B2 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6190591A (en) * 1984-10-09 1986-05-08 Matsushita Electric Ind Co Ltd Picture display device
JPS6243291A (en) * 1985-08-21 1987-02-25 Hitachi Ltd Signal processor for video printer
JPH01222967A (en) * 1988-03-03 1989-09-06 Copal Co Ltd Saturation adjustment of digital image and device

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6190591A (en) * 1984-10-09 1986-05-08 Matsushita Electric Ind Co Ltd Picture display device
JPS6243291A (en) * 1985-08-21 1987-02-25 Hitachi Ltd Signal processor for video printer
JPH01222967A (en) * 1988-03-03 1989-09-06 Copal Co Ltd Saturation adjustment of digital image and device

Also Published As

Publication number Publication date
JP2692278B2 (en) 1997-12-17

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