JPH0392976A - Picture information storage device - Google Patents

Picture information storage device

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Publication number
JPH0392976A
JPH0392976A JP1230997A JP23099789A JPH0392976A JP H0392976 A JPH0392976 A JP H0392976A JP 1230997 A JP1230997 A JP 1230997A JP 23099789 A JP23099789 A JP 23099789A JP H0392976 A JPH0392976 A JP H0392976A
Authority
JP
Japan
Prior art keywords
bits
color
information
pixel
colors
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
Application number
JP1230997A
Other languages
Japanese (ja)
Inventor
Ryuichi Shiobara
隆一 塩原
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.)
Seiko Epson Corp
Original Assignee
Seiko Epson Corp
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 Seiko Epson Corp filed Critical Seiko Epson Corp
Priority to JP1230997A priority Critical patent/JPH0392976A/en
Publication of JPH0392976A publication Critical patent/JPH0392976A/en
Pending legal-status Critical Current

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  • Controls And Circuits For Display Device (AREA)
  • Image Input (AREA)
  • Storing Facsimile Image Data (AREA)

Abstract

PURPOSE:To effectively use a memory device and to more subtly express the color per one pixel by using (2<2n>-1)/3 bits and ((2<2n>-1)/3+1) bits for information of two colors and that of another color respectively to store color information of one pixel with 2<2n> bits in a total. CONSTITUTION:When respective color information of R, G, and B is stored in the case of a bit width 100, respective color information are stored as binary information in red (R) 101, green (G) 102, and blue (B) 103. When the bit width 100 is 8 bits, the lightness of color is stored with a bit width 104 of R 101 as 3 bits, a bit width 105 of G 102 as 3 bits, and a bit width 106 of B as 2 bits. As the result, 256 (8X8X4=256) colors can be expressed per one pixel. Thus, the number of colors expressed per one pixel is increased, and a memory is effectively used, and color information of each pixel is easily handled.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明はカラー画像の記憶方法に関する.[従来の技術
] 一般に各種データ処理機器において様々なデータは,8
ビット,16ビットなど8の倍数ビットのデータエリア
に記憶するのが普通である.これはCPUやメモリが,
8ビットの整数倍のビット幅データの取扱を基本に設計
されいるからであり,各種データは8ビットの整数倍の
ビット幅内で扱うことが,メモリの使用効率やデータ転
送速度などの点で優れているからである.一方,色の表
現は赤(R),緑(G),青(B)の3色の明暗の組合
せで表すのが一般的である.また,各色の情報量は平等
に扱うのが従来の技術である. このため,カラー画像情報の1ピクセル当たりの情報量
としては3の整数倍のビット幅を必要とするが,この1
ピクセルの情報を8ビットの整数倍のビット幅内に記憶
していた. 8の整数倍ビット幅に1ピクセルの色情報を記憶する場
合を考える.例えば8ビットの場合R,G,B各色2ビ
ット計6ビットで記憶し,あとの2ビットは未使用にす
る.また,16ビットの場合は,R,G,B各色5ビッ
ト計l5ビットで記憶して,あと1ビットは未使用にす
るのが従来の技術である.この様にR,G,B各ビット
を同一ビット幅で記憶するのも前述の通り従来の技術で
ある. ところが,この様な記憶方式では先に述べた通りメモリ
の無駄が多く.また,多色表現するために例えばR,G
,B各色をそれぞれ2ビットから3ビットに変更して記
憶することを考えると8ビット幅を越えてしまい計9ビ
ットとなり16ビット幅使用の場合,さらに7ビットも
のメモリの無駄が発生し,取扱も不便になる.この様に
,取扱性,メモリの効率性を優先して記憶すると多色化
も制限されることになる. [発明が解決しようとする課題] この様に,色情報を含む画像データの記憶方法には上記
の課題がある.すなわち,1ピクセル当たりの色表現を
多くしたい一方で,メモリも有効に利用し,さらに各ピ
クセルの色情報の取扱も容易にしたいということである
. 本発明は,この様な課題を解決するもので,その目的は
,1ピクセル当たりの色表現を多く,かつメモリを有効
に利用し,さらに各ピクセルの色情報の取扱を容易にす
ることにある. [課題を解決するための手段] 1) 1ピクセルの色情報を3色分解して記憶する画像
情報記憶装置において(n≧1とする),1ピクセルの
色情報を,1色の色情報について(22n−1)/3ビ
ット,他の1色の色情報を(22″−1)/3ビット;
さらに他の1色の色情報を(22n−1)/3+1ビッ
ト使用し,合計22″ビット使用して記憶することを特
徴とする. 2) 1ピクセルの色情報を3色分解して記憶する画像
情報記憶装置において〈n≧1とする)、1ピクセルの
色情報を,1色の色情報について( 2 ””− 2 
) /3ビット,他の1色の色情報を(22n”−2)
/3+1ビット,さらに他の1色の色情報を(22n”
−2)/3+1ビット使用し,合計2 2″4′1ビッ
ト使用して記憶することを特徴とする. [実施例] 第1図は本発明の実施例における色情報のメモリ記憶方
法の1つであって,ビット幅が100である場合にRG
B各色情報を記憶する1例である.101に赤(R)1
02に緑(G)103に青(B)の情報を2値記憶する
.100が8ビットである場合,各色の割当てビット幅
を,それぞれ3,3.2ビットとする.例えば,101
のRのビット幅104を3ビット,102のGのビット
幅105を3ビット,103のBのビット幅106を2
ビットとして色の明度をそれぞれ記憶する.すなわち,
RはO〜7の値を記憶でき8階調,GもO〜7の8階調
,BはO〜3の4階調を記憶することになる.この結果
,1ピクセルあたり8X8X4=256で256色の色
表現が可能となる.また,この例の場合,赤や緑,黄の
色表現がより細かく行われることになる.このため,赤
,緑,黄など青系を含まないカラー画像の記憶に有効で
ある. 例えば,R=6,G=5,B=1の場合(R,Gは3ビ
ット表現,Bは2ビット表現) 11010101と記
憶される, 第2図も本発明の実施例における色情報メモリ記憶方法
の1つであってビット幅が200である場合にRGB各
色情報を記憶する1例である.20lに赤(R)202
に緑(G)203に青(E)の情報を2値記憶する.2
00が16ビットである場合.各色の割当てビット幅を
,それぞれ,6,5.5ビットとする.例えば,201
のRのビット幅204を6ビット,202のGのビット
幅205を5ビット,203のBのビット幅206を5
ビットとして色の明度をそれぞれ記憶する.すなわち,
Rは0〜63の値を記憶でき64階調,GはO〜31の
32階調,BはO〜31の32階調が記憶可能である.
この結果,1ピクセルあたり64X32X32=655
36で65536色の色情報が記憶が可能となった・ すなわち.この方法により65536色の色表現が可能
になっている.この例の場合赤の微妙な階調が画像のよ
り豊かな色表現につながる場合に適する. この場合の記憶例としては,R=57,G=3,B=3
0の場合(Rは6ビット表現,GとBは5ビット表現)
  1110010001111110と記憶される.
以上の8ビット,16ビット幅では,従来の方法(R,
G.B各色同一ビット幅で記憶)によれば,それぞれ4
X4X4=64で64色,32X32x32=3276
8で32768色の表現しかできなかった. これが,本発明により8ビット,16ビット幅でそれぞ
れ256色,65536色の表現が可能になった. また,R,G,B各色のビット配分は,前述の通り保存
するカラー画像の内容により決定することにより,より
画像に相応しく細かい階調の画像記憶が可能となる. 第3図は,本発明を画像取込及び出力システムに応用し
た実施例の1例である. 300はカラー画像取込センサーで,取込んだカラー画
像の1ピクセル当たりの色をR,G,B各色に分解して
取込む機能を持ちそれぞれ301, 302,303か
ら出力する.一方,そのピクセルの画像位置情報を32
0を通じて出力する機能を持つ.(3QOの例として密
着型カラーイメージラインセンサーや面画像をスキャン
できるカラーイメージ面センサー等を利用したビデオカ
メラなども考えられる)これら301, 302, 3
03のRGB各信号は304,305, 306のA/
D変換器に入力される.3つのA/D変換器は,6ビッ
ト変換出力を持ち, 307. 308, 309を通
じそれぞれR,G,B各色の明暗を変換してデジタル出
力する.変換信号は310の画像情報記憶処理装置に入
力される.310は300から出力される画像位置情報
320をもとに画像記憶アドレスを決定することになる
.315は310内のカラー画像メモリで1ピクセル当
たり16ビットの記憶が可能である.この16ビットに
そのピクセルの色情報が記憶される.16ビットは31
1, 312,313の各領域にそれぞれ6,5.5ビ
ットずつに分けられ,それぞれ307, 308, 3
09にR,G,Bの明暗デジタルデータが記憶される.
このときRは307の6ビットを,その他のG,Bは3
08, 309の出力データの上位5ビットを,それぞ
れ311,312, 313に記憶する.310は30
0から取込まれた各ピクセルの色情報を,位置情報をも
とに記憶し画像全体のイメージを315内に記憶する.
また310の処理装置は,330の大容量記憶装置に3
15の画像データを転送記憶する機能も持ち,カラー画
像情報を保存することができる.このとき,画像データ
は331の16ビットバスを経由して,1ピクセルごと
に315内と同一の形式で記憶される. 一方,330に記憶されているデータは,再び315に
取込むことができる.また315内のデータは,344
, 345, 346のD/A変換器にそれぞれ341
,342, 343を通じて出力され350のアナログ
力ラーモニタに表示可能である.このとき,344は6
ビット345と346は5ビットD/A変換器である.
D/A変換器の出力はR信号は347, G信号は34
8,B信号は349を通じて350に入力される.また
.310は同時に画像の位置情報を340を通じて35
0に出力する.こうすることにより310が表示制御を
.行うことにより,350上にカラ一画像を再現表示す
ることができる. 以上は,本発明の実施例の1例にすぎない.例えば,カ
ラーイメージスキャナやカラービデオ処理装置で画像情
報のデジタル記憶する場合,あるいは,コンピュータ内
で取扱うカラー画像の記憶方法,カラーデジタルコビー
やカラープリンタ内でのカラー画像取扱時の方法,カラ
ーファクシミリの伝送時のデータ格納方法,カラー画像
を光学的コンパクトディスクROMや光学的光磁気ディ
スクに記憶する場合の記憶方法など,カラー画像を取扱
う全ての装置に於ける画像記憶方法に適用できる, [発明の効果] 以上に述べたように本発明により,通常取扱うCPUや
メモリ装置を効率的に有効利用し,かつ1ピクセル当た
りの色をより微妙に多色表現可能になり,さらに各ピク
セルの色情報の取扱が容易なようにメモリ記憶が可能で
ある効果を有する,
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for storing color images. [Prior art] In general, various data in various data processing devices are
Normally, data is stored in a data area that is a multiple of 8 bits, such as 16 bits or 16 bits. This means that the CPU and memory
This is because the design is based on the handling of data with a bit width that is an integral multiple of 8 bits, and handling various data within a bit width that is an integral multiple of 8 bits is beneficial in terms of memory usage efficiency and data transfer speed. This is because it is excellent. On the other hand, color is generally expressed by a combination of brightness and darkness of three colors: red (R), green (G), and blue (B). Furthermore, conventional technology treats the amount of information for each color equally. Therefore, the amount of information per pixel of color image information requires a bit width that is an integral multiple of 3;
Pixel information was stored within a bit width that was an integral multiple of 8 bits. Consider the case where color information for one pixel is stored in an integer multiple of 8 bit width. For example, in the case of 8 bits, 2 bits for each color of R, G, and B are stored as a total of 6 bits, and the remaining 2 bits are left unused. In addition, in the case of 16 bits, the conventional technology is to store 5 bits for each color of R, G, and B as a total of 15 bits, and leave the remaining 1 bit unused. As mentioned above, storing the R, G, and B bits in the same bit width is also a conventional technique. However, as mentioned earlier, this storage method wastes a lot of memory. In addition, for multicolor expression, for example, R, G
, B If you change each color from 2 bits to 3 bits and store them, the width will exceed 8 bits, resulting in a total of 9 bits.If you use 16 bits, an additional 7 bits of memory will be wasted, making it difficult to handle. It will also be inconvenient. In this way, if ease of handling and memory efficiency are prioritized when storing data, the ability to use multiple colors will be limited. [Problems to be Solved by the Invention] As described above, the method for storing image data including color information has the above-mentioned problems. In other words, while we want to express more colors per pixel, we also want to use memory more effectively and make it easier to handle the color information for each pixel. The present invention solves these problems, and its purpose is to express more colors per pixel, use memory effectively, and facilitate the handling of color information for each pixel. .. [Means for solving the problem] 1) In an image information storage device that separates and stores color information of one pixel into three colors (n≧1), the color information of one pixel is separated into three colors and stored. (22n-1)/3 bits, color information of one other color (22″-1)/3 bits;
Furthermore, the color information of one other color is stored using (22n-1)/3+1 bits, which is a total of 22'' bits. 2) Color information of one pixel is separated into three colors and stored. In the image information storage device (where n≧1), the color information of one pixel is expressed as the color information of one color (2 ”” - 2
) /3 bits, color information of one other color (22n”-2)
/3+1 bits, and color information of one other color (22n”
-2)/3+1 bits are used, and a total of 22''4'1 bits are used for storage. [Embodiment] Fig. 1 shows one of the color information memory storage methods according to the embodiment of the present invention. and the bit width is 100, then RG
B This is an example of storing information for each color. 101 and red (R) 1
02 stores green (G) information and 103 stores blue (B) information in binary form. If 100 is 8 bits, the allocated bit width for each color is 3 and 3.2 bits, respectively. For example, 101
The bit width 104 of R in 102 is 3 bits, the bit width 105 of G in 102 is 3 bits, and the bit width 106 of B in 103 is 2 bits.
The brightness of each color is stored as a bit. That is,
R can store values from O to 7 and has 8 gradations, G can also store 8 gradations from O to 7, and B can store 4 gradations from O to 3. As a result, it is possible to express 256 colors (8X8X4=256 per pixel). Also, in this example, the colors red, green, and yellow will be expressed in more detail. Therefore, it is effective for storing color images such as red, green, and yellow that do not contain blue colors. For example, in the case of R=6, G=5, B=1 (R, G are 3-bit representations, B is 2-bit representations), the color information is stored as 11010101. Figure 2 also shows the color information memory storage in the embodiment of the present invention. This is one example of storing RGB color information when the bit width is 200. 20l red (R) 202
In the green (G) 203, blue (E) information is stored in binary form. 2
If 00 is 16 bits. The allocated bit width for each color is 6 and 5.5 bits, respectively. For example, 201
The bit width 204 of R in 202 is 6 bits, the bit width 205 of G in 202 is 5 bits, and the bit width 206 of B in 203 is 5 bits.
The brightness of each color is stored as a bit. That is,
R can store values from 0 to 63 and 64 gradations, G can store 32 gradations from O to 31, and B can store 32 gradations from O to 31.
As a result, 64X32X32=655 per pixel
36, it became possible to store color information for 65,536 colors. This method makes it possible to express 65,536 colors. In this example, it is suitable when subtle gradations of red lead to richer color expression in the image. As a memory example in this case, R=57, G=3, B=3
In the case of 0 (R is 6-bit representation, G and B are 5-bit representation)
1110010001111110 is stored.
With the above 8-bit and 16-bit widths, the conventional method (R,
G. B), each color has the same bit width.
64 colors at X4X4=64, 32X32x32=3276
8 could only express 32,768 colors. However, the present invention has made it possible to express 256 colors and 65,536 colors in 8-bit and 16-bit widths, respectively. Furthermore, by determining the bit allocation for each color of R, G, and B according to the content of the color image to be saved as described above, it becomes possible to store images with finer gradations that are more appropriate for the image. Figure 3 is an example of an embodiment in which the present invention is applied to an image capture and output system. Reference numeral 300 is a color image capturing sensor which has a function of separating the color of each pixel of the captured color image into R, G, and B colors and outputting them from 301, 302, and 303, respectively. On the other hand, the image position information of that pixel is
It has the function of outputting through 0. (As an example of 3QO, a video camera using a close-contact color image line sensor or a color image surface sensor that can scan a surface image can also be considered.) These 301, 302, 3
03 RGB signals are 304, 305, 306 A/
Input to D converter. The three A/D converters have 6-bit conversion outputs, 307. Through 308 and 309, the brightness of each R, G, and B color is converted and output digitally. The converted signal is input to an image information storage and processing device 310. 310 determines the image storage address based on the image position information 320 output from 300. 315 is a color image memory in 310 that can store 16 bits per pixel. The color information of that pixel is stored in these 16 bits. 16 bits is 31
The areas 1, 312, and 313 are divided into 6 and 5.5 bits, respectively, and 307, 308, and 3 bits, respectively.
09 stores R, G, and B light and dark digital data.
At this time, R has 6 bits of 307, and other G and B have 3 bits.
The upper 5 bits of the output data of 08 and 309 are stored in 311, 312, and 313, respectively. 310 is 30
The color information of each pixel taken in from 0 is stored based on the position information, and the image of the entire image is stored in 315.
The 310 processing units also have 330 mass storage units.
It also has a function to transfer and store 15 image data, and can save color image information. At this time, image data is stored in the same format as in 315 for each pixel via the 16-bit bus of 331. On the other hand, the data stored in 330 can be imported into 315 again. Also, the data in 315 is 344
, 345, and 346 D/A converters, respectively.
, 342, 343 and can be displayed on the analog power monitor of 350. At this time, 344 is 6
Bits 345 and 346 are a 5-bit D/A converter.
The output of the D/A converter is 347 for the R signal and 34 for the G signal.
8, the B signal is input to 350 through 349. Also. 310 simultaneously transmits the position information of the image to 35 through 340.
Output to 0. By doing this, 310 can control the display. By doing this, a color image can be reproduced and displayed on the 350. The above is just one example of the embodiment of the present invention. For example, when image information is digitally stored in a color image scanner or color video processing device, how color images are stored in a computer, how color images are handled in a color digital coby or color printer, or how a color facsimile is handled. This invention can be applied to image storage methods in all devices that handle color images, such as data storage methods during transmission and storage methods for storing color images on optical compact disk ROMs and optical magneto-optical disks. [Effects] As described above, the present invention makes it possible to efficiently and effectively use the CPU and memory devices that are normally used, to express multiple colors in a more subtle way per pixel, and to further improve the color information of each pixel. It has the effect of being able to be stored in memory for easy handling.

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

第1図は本発明の色情報のメモリ記憶法を示す概要図. 第2図も本発明の色情報のメモリ記憶法を示す概要図. 第3図は本発明を用いた画像入出力システムの概構成図
. 101:赤階調情報記憶エリア 100:情報記憶幅 101:赤階調情報記憶エリア 102:緑階調情報記憶エリア 103:青階調情報記憶エリア 300 :カラ一画像センサ ら 304,305,30ネ: A/D変換器310:画像
情報記憶及び処理装置 315:画像情報記憶エリア 330:大容量補助記憶装置 344,345,346 : D/A変換器350:カ
ラ一画像表示装置 以上
Figure 1 is a schematic diagram showing the method of storing color information in memory according to the present invention. Figure 2 is also a schematic diagram showing the method of storing color information in memory according to the present invention. Figure 3 is a schematic diagram of an image input/output system using the present invention. 101: Red gradation information storage area 100: Information storage width 101: Red gradation information storage area 102: Green gradation information storage area 103: Blue gradation information storage area 300: Color image sensors 304, 305, 30 : A/D converter 310: Image information storage and processing device 315: Image information storage area 330: Large capacity auxiliary storage device 344, 345, 346: D/A converter 350: Color image display device or higher

Claims (1)

【特許請求の範囲】 1)1ピクセルの色情報を3色分解して記憶する画像情
報記憶装置において(n≧1とする)、1ピクセルの色
情報を、1色の色情報について(2^2^n−1)/3
ビット、他の1色の色情報を(2^2^n−1)/3ビ
ット、さらに他の1色の色情報を(2^2^n−1)/
3+1ビット使用し、合計2^2^nビット使用して記
憶することを特徴とする画像情報記憶装置。 2)1ピクセルの色情報を3色分解して記憶する画像情
報記憶装置において(n≧1とする)、1ピクセルの色
情報を、1色の色情報について(2^2^n^+^1−
2)/3ビット、他の1色の色情報を(2^2^n^+
^1−2)/3+1ビット、さらに他の1色の色情報を
(2^2^n^+^1−2)/3+1ビット使用し、合
計2^2^n^+^1ビット使用して記憶することを特
徴とする画像情報記憶装置。
[Scope of Claims] 1) In an image information storage device that separates the color information of one pixel into three colors and stores it (n≧1), the color information of one pixel is separated into three colors and stored (n≧1). 2^n-1)/3
bit, the color information of one other color is (2^2^n-1)/3 bits, and the color information of one other color is (2^2^n-1)/
An image information storage device characterized in that it stores data using 3+1 bits, a total of 2^2^n bits. 2) In an image information storage device that separates the color information of one pixel into three colors and stores it (n≧1), the color information of one pixel is separated into three colors and stored (2^2^n^+^ 1-
2)/3 bits, color information of one other color (2^2^n^+
^1-2)/3+1 bits, and color information of one other color (2^2^n^+^1-2)/3+1 bits are used, for a total of 2^2^n^+^1 bits. An image information storage device characterized in that it stores images.
JP1230997A 1989-09-06 1989-09-06 Picture information storage device Pending JPH0392976A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1230997A JPH0392976A (en) 1989-09-06 1989-09-06 Picture information storage device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1230997A JPH0392976A (en) 1989-09-06 1989-09-06 Picture information storage device

Publications (1)

Publication Number Publication Date
JPH0392976A true JPH0392976A (en) 1991-04-18

Family

ID=16916617

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1230997A Pending JPH0392976A (en) 1989-09-06 1989-09-06 Picture information storage device

Country Status (1)

Country Link
JP (1) JPH0392976A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA022054B1 (en) * 2008-06-06 2015-10-30 Эм-Ай Эл. Эл. Си. A vibratory separator and a method of separating solids from slurry using said separator
JP2020065711A (en) * 2018-10-24 2020-04-30 株式会社藤商事 Game machine
JP2020065712A (en) * 2018-10-24 2020-04-30 株式会社藤商事 Game machine
JP2020065710A (en) * 2018-10-24 2020-04-30 株式会社藤商事 Game machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA022054B1 (en) * 2008-06-06 2015-10-30 Эм-Ай Эл. Эл. Си. A vibratory separator and a method of separating solids from slurry using said separator
JP2020065711A (en) * 2018-10-24 2020-04-30 株式会社藤商事 Game machine
JP2020065712A (en) * 2018-10-24 2020-04-30 株式会社藤商事 Game machine
JP2020065710A (en) * 2018-10-24 2020-04-30 株式会社藤商事 Game machine

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