JPS59111472A - Transmission processing system of color picture information - Google Patents

Transmission processing system of color picture information

Info

Publication number
JPS59111472A
JPS59111472A JP22276382A JP22276382A JPS59111472A JP S59111472 A JPS59111472 A JP S59111472A JP 22276382 A JP22276382 A JP 22276382A JP 22276382 A JP22276382 A JP 22276382A JP S59111472 A JPS59111472 A JP S59111472A
Authority
JP
Japan
Prior art keywords
color
data
memory
image information
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
JP22276382A
Other languages
Japanese (ja)
Inventor
Yoshinori Yamada
義憲 山田
Osamu Suzuki
治 鈴木
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.)
Sanyo Electric Co Ltd
Sanyo Denki Co Ltd
Original Assignee
Sanyo Electric Co Ltd
Sanyo Denki 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 Sanyo Electric Co Ltd, Sanyo Denki Co Ltd filed Critical Sanyo Electric Co Ltd
Priority to JP22276382A priority Critical patent/JPS59111472A/en
Publication of JPS59111472A publication Critical patent/JPS59111472A/en
Pending legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N1/00Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
    • H04N1/46Colour picture communication systems
    • H04N1/64Systems for the transmission or the storage of the colour picture signal; Details therefor, e.g. coding or decoding means therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Color Image Communication Systems (AREA)

Abstract

PURPOSE:To suppress the redundancy lower by coding color picture information and transmitting the result. CONSTITUTION:The transmission side has a memory 8 for color table having the three primary color data corresponding to the code. The memory 8 consists of an ROM, in whch the amount of the three primary color component of a color is numerized and stored. A color video signal is digitized and inputted to a comparison selecting circuit 7. The comparison selecting circuit 7 selects the content of the memory 8 closest to the inputted color data and generates the corresponding code. A coding circuit 9 compresses this code further. The receiving side also has the color table and obtains the video data in opposite procedure as the transmission side.

Description

【発明の詳細な説明】 (イ)産業上の利用分野 本発明はカラーファクシミリ装置やその池のカラー画像
装置に適用され、カラー画情報をデジタル信号な1式で
伝送し、汁つ、その伝送された画情報を再現するだめの
方式に関する。
Detailed Description of the Invention (a) Industrial Application Field The present invention is applied to color facsimile machines and other color image devices, and is used to transmit color image information as a set of digital signals. This invention relates to a method for reproducing image information that has been captured.

(ロ)従来技術 例えはカラーファクシミリ装置に於て、カラー原稿から
得る三原色情報をデジタル信号型式で伝送する場合に、
その三原色の各々に1ビツトずつ割り当てるようにした
のでは、三原色とその補色及び白、黒の8色しか扱えな
い。このため、三原色の各々に2ビツトずつ割り当てる
(即ち、三原色それぞれの大きさが4段階に切り換わる
)ようにすると、4X4X4=64であるから、種々の
中間色を含む64色を伝送できることになる。17かし
、この場合には1画素当り2X3=6ビツト必要である
から、中間調を含まない白黒原稿の場合の6倍の情報量
となり、伝送時間が大幅に増大することになる。しかも
、カラーファクシミリ装置等が対象とするカラー原稿は
16色もあれは充分再現できるので、情報の冗長度が増
すことにもなる。
(b) Prior Art For example, in a color facsimile machine, when transmitting the three primary color information obtained from a color document in digital signal format,
If one bit is assigned to each of the three primary colors, only eight colors can be handled: the three primary colors, their complementary colors, white, and black. Therefore, if two bits are assigned to each of the three primary colors (that is, the size of each of the three primary colors is switched in four steps), 4X4X4=64, so 64 colors including various intermediate colors can be transmitted. However, in this case, since 2×3=6 bits are required per pixel, the amount of information is six times that of a monochrome original that does not include halftones, and the transmission time will be significantly increased. Furthermore, since color originals that are used by color facsimile machines and the like can be sufficiently reproduced in 16 colors, the redundancy of information increases.

このように、カラー画情報の三原色成分の大きさく又は
それらの比率を示す係数〉を直接デジタル信号に変換し
て伝送する従来の方法では、1画素当りの情報量が増大
すると共に冗長度−が増し、徒らに伝送時間が増大する
と言う欠点があった。
In this way, in the conventional method of directly converting the size of the three primary color components of color image information or the coefficients indicating their ratio into digital signals and transmitting them, the amount of information per pixel increases and the degree of redundancy increases. This has the disadvantage that the transmission time increases unnecessarily.

(ハ)目的 本発明は上述の点を考慮してなされたものであり、中間
色を含む多数の色を表わすカラー画情報を、冗長度を低
く抑え、できるたけ少ないビット数で、テシタル伝送し
且つ再現できる伝送処理方式を提案することを目的とす
る。
(c) Purpose The present invention has been made in consideration of the above-mentioned points, and it is an object of the present invention to digitally transmit color image information representing a large number of colors including intermediate colors using as few bits as possible while suppressing redundancy. The purpose is to propose a transmission processing method that can be reproduced.

(ニ)構成 本発明の伝送処理方式は、端的に1えは、伝送側及び受
信側に予め数種の色を設定したカラーテーブル用メモリ
をそれぞれ備え、送信側では上記ノー[りを参照して伝
送すべきカラー画情報の各画素毎の三原色f〜夕を前記
数種の色の一一一つを示すシード信号に変換しで受信側
に伝送し、受信側では上記メモリを参照して受信したコ
ード信号に対応畦る各画素毎の三原色データを再現する
ようにしたものであるう更に詳述憚ると、上記各メモリ
は任意の色の三原色成分の比率(又は大きき)を示すデ
ータを1組として、このデータを予め設定された数種の
色に対応しで複数組格納しておし)、送信側では伝送す
べきカラー画情報の三原色データを各画素毎に上記メモ
リ内の各組のデータと比較し、この比較により上記カラ
ー画情報が上記メモリ内の何れの組のデータに対応する
かを示すコード信号を5受信側に伝送し、受信側では前
記コード信号を受信して該コード信号に対応する1組の
データを上記メモリから読出し各画素毎の三原色データ
とするようにしている。
(D) Configuration The transmission processing method of the present invention is, simply put, 1. The transmission side and the reception side are each equipped with a color table memory in which several colors are set in advance, and the transmission side The three primary colors of each pixel of the color image information to be transmitted are converted into seed signals indicating each of the several colors and transmitted to the receiving side, and the receiving side refers to the memory mentioned above. It is designed to reproduce the three primary color data for each pixel corresponding to the received code signal.To elaborate further, each of the above memories indicates the ratio (or size) of the three primary color components of an arbitrary color. This data is stored in multiple sets corresponding to several preset colors), and on the transmitting side, the three primary color data of the color image information to be transmitted are stored in the above memory for each pixel. A code signal indicating which set of data in the memory the color image information corresponds to is transmitted to the receiving side based on this comparison, and the receiving side receives the code signal. Then, a set of data corresponding to the code signal is read out from the memory and used as three primary color data for each pixel.

(ホ)実施例 図面は本発明を採用した装置の一実施例を示し、第1図
は送信側装置の概略ブロック図であり、第2図は受信側
装置の概略ブロック図である。
(E) Embodiment The drawings show an embodiment of a device employing the present invention; FIG. 1 is a schematic block diagram of a transmitting device, and FIG. 2 is a schematic block diagram of a receiving device.

先ず第1図に於いて、(1)(2)(3)はカラーファ
クシミリ装置等の読取りヘッドに設けられた1組のカシ
−センサーであり、それぞれ減色混合の場合の三原色即
ちシアン(C)、マゼンダ<M )、イIC+−(Y)
を読取るようになっている。(4>(5)(6)はその
各センサーの1画素毎の出力をそれぞれ8段階のレベル
で量子化して並列3ビツトのデータに変換するためのA
/D変換回路であり、その各データは次のマイクロプロ
セッサからなるデータ比較兼アドレス選択回路(7)に
それぞれ導入される。
First, in Fig. 1, (1), (2), and (3) are a pair of color sensors installed in the reading head of a color facsimile machine, etc., and each detects the three primary colors, cyan (C), in the case of subtractive color mixing. , Magenta<M), IC+-(Y)
It is designed to read. (4>(5)(6) is A for quantizing the output of each pixel of each sensor at 8 levels and converting it into parallel 3-bit data.
/D conversion circuit, and each data is introduced into a data comparison and address selection circuit (7) consisting of the next microprocessor.

一方、(8)は前記三原色で表わされる16色を設定(
、ておくための書込み可能なROMからなるカラーテー
ブル用メモリであり、このメモリには一つの色の三原色
成分<C)<M)(Y)の比率(又は太ささンを示す数
値を2進数化したデータを1 aIとして3、これを次
の表の如く先の16色即ち16組格納している。その際
、この16色は上記三原色及びその補色、即ち、シアン
、マゼンダ、イエロー、青、赤、緑及び白、黒の8色他
に、例えは黄緑、オレンノ、クラウン等の8種類の中間
色か設定きれる力釈 これらの色は種々のカラー原稿を
考慮して決めればよい。
On the other hand, (8) sets 16 colors represented by the three primary colors (
This memory is a color table memory consisting of a writable ROM for storing the ratio of the three primary color components <C) <M) (Y) of one color (or the numerical value indicating the thickness as a binary number). The converted data is referred to as 1aI3, and this is stored in the previous 16 colors, or 16 sets, as shown in the table below.In this case, these 16 colors are the above three primary colors and their complementary colors, namely cyan, magenta, yellow, and blue. In addition to the eight colors red, green, white, and black, eight intermediate colors such as yellow-green, orange, and crown can be set. These colors can be determined by considering various color originals.

なお、下表では各データは便宜上10進数値で表わし又
いる。
In the table below, each data is expressed as a decimal value for convenience.

1iii記比較選択回路(7)は前記A/D変換回路(
4)(5)(6)からの入力デー、夕とメモリ(8)内
の各組のC,IvI、Yそれぞれのデータとを1画素毎
に比較し、その時の人力データに最も近い1組のデータ
が格納された上記メモリの番地2検知し、その番地を示
ず4桁のアドレスフードを出力する。従って、今、例え
は上記人力データとしてC=0.875、M=0、Y 
= 0.125(これらは本来2進数値であるが、ここ
では便宜上10進数値で表わす)が入力された時は、シ
アンを示す上記メモリ(8〉の1番地のアドレス−1−
ド〔0001)を出力する訳である。
The comparison selection circuit (1iii) (7) is the A/D conversion circuit (
4) Compare the input data from (5) and (6) with each set of C, IvI, and Y data in memory (8) pixel by pixel, and select the set that is closest to the manual data at that time. Detects address 2 of the memory where the data of is stored, and outputs a 4-digit address hood without indicating that address. Therefore, for example, as the above human data, C=0.875, M=0, Y
= 0.125 (these are originally binary values, but here they are expressed as decimal values for convenience), the address -1- of address 1 of the memory (8>) indicating cyan is input.
This means that the code [0001] is output.

従って、二の比較選択回路(7〉からは1画素当り3X
3=9ビツトの三原色情報が4ビットに変換されて出力
されることになる。
Therefore, from the second comparison and selection circuit (7), 3X per pixel
3=9 bits of three primary color information will be converted to 4 bits and output.

次の符号化回路(9)は適当なランレングス符号等を使
J、131..1111記比較選択回路(7)から1画
素毎に出力された並列4ピントの231コードくアドレ
ス二ノ一ド)を各桁・毎に帯域圧縮符号化し、その符号
化後の各桁の圧縮ロード佑号を次々に変調回路(10)
に送る。そして、この変調回路(10)はその各桁の圧
縮コード信号を適当なりロックによって順次1桁ずつ回
線に送り出す。
The next encoding circuit (9) uses an appropriate run-length code, J, 131. .. The parallel 4-pin 231 code (address 2-no-1) output from the comparison and selection circuit (7) of No. 1111 for each pixel is band-compressed encoded for each digit, and the compressed load of each digit after the encoding is performed. A circuit that modulates signals one after another (10)
send to Then, this modulation circuit (10) sequentially sends out the compressed code signal of each digit to the line one digit at a time with appropriate locking.

次に第2図に於いて、(10)は回線を介して伝送きれ
た受信信号を復調する復調回路であり、その復調後の各
桁の圧縮コード信号が次の復号化回路(12)でデコー
ドされる。従って、このデコード回路(12)からは各
画素毎の前述した並列4ビツトのアドレスコードが次々
に再現され次のデータ選択回路(13)に送られる。
Next, in Fig. 2, (10) is a demodulation circuit that demodulates the received signal that has been transmitted through the line, and the compressed code signal of each digit after demodulation is sent to the next decoding circuit (12). decoded. Therefore, the aforementioned parallel 4-bit address code for each pixel is successively reproduced from this decoding circuit (12) and sent to the next data selection circuit (13).

前記データ選択回路<13)はマイクロプロセッサから
なり、次々と入力されたアドレスコードに対応するデー
タをカラーテーブル用メモリ(14)から読出す。その
際、このメモリ(14)には送信側と全く同し前表のデ
ータが格納されており、従って、このメモリ内の1組の
C%MXYそれぞれのデータが次々と読出される。従っ
て、例えば前述の如く送信側でファンを示すコード(0
001〕に変換きれ社つ符号化伝送された成る画素のカ
ラー情報が、受信側でシアンに相当する三原色データと
して再現される訳である。
The data selection circuit <13) is composed of a microprocessor, and reads out data corresponding to successively input address codes from the color table memory (14). At this time, this memory (14) stores exactly the same data in the previous table as that on the transmitting side, and therefore, each set of C%MXY data in this memory is read out one after another. Therefore, for example, as mentioned above, the code (0
001], the color information of the pixel encoded and transmitted is reproduced on the receiving side as three primary color data corresponding to cyan.

前記データ選択回路り13〉からの三原色データはD/
A変換回路(14)(15)(16)でアナログ信号に
変換され、その各信号が図示しない増幅回路等を通って
カラーファクシミリ装置等の3個1組のカラー記録ヘッ
ド(17)(18>(19)に印加きれ、インク等の減
色混合によってカラー記録が行なわれる訳である。
The three primary color data from the data selection circuit 13> are D/
The A conversion circuits (14), (15), and (16) convert the signals into analog signals, and each signal passes through an amplifier circuit (not shown) to a set of three color recording heads (17) (18) of a color facsimile machine, etc. (19) is applied completely, and color recording is performed by subtractive color mixing of inks and the like.

なお、上記実施例ではメモリ(8)(14>内の番地を
示す4桁のアトし・スコードを各桁毎に圧縮符号化して
伝送するものとしたが、各画素毎の上記アドレスコード
を圧縮符号化せず1桁ず−〕、或いは、1画素分ずつシ
リアルに伝送するようにすることもできる。そして、そ
の何れの方法を採用するにしても、伝送すべきカラー画
情報が1画素当たり4ビツトになっているから、16色
を含むカラー画情報を送受信する際に、三原色データ自
体を直接伝送する場合く1画素当り6ビ・/)・になる
)に比較して伝送ビット数を減少できることになる。
In the above embodiment, the four-digit address code indicating the address in the memory (8) (14>) is compressed and encoded for each digit and transmitted. It is also possible to serially transmit one digit at a time without encoding, or to serially transmit one pixel at a time.Whichever method is adopted, the color image information to be transmitted is Since it is 4 bits, when transmitting and receiving color image information including 16 colors, the number of bits to be transmitted is reduced compared to 6 bits per pixel when the three primary color data themselves are directly transmitted. This means that it can be reduced.

(へ)効果 以上の如く本発明の伝送処理方式に依れば、中間色を含
む多数の色を有するカラー画情報を伝送する際に、その
カラー情報の冗長度を抑え、できるだけ少ない情報量で
伝送し再現するようにしているので、伝送時間の短縮が
画れ、しかも、簡単なデータ処理を行なうだけで実現で
き、カラーファクシミリ装置等に好適である。
(f) Effects As described above, according to the transmission processing method of the present invention, when transmitting color image information having a large number of colors including intermediate colors, the redundancy of the color information is suppressed and the amount of information is transmitted as small as possible. Since the image data is reproduced in the same way, the transmission time can be reduced, and it can be realized by simple data processing, making it suitable for color facsimile machines and the like.

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

図面は本発明の伝送処理方式を採用した装置の一実施例
を示し、第1図は送信側装置のブロック図であり、第2
図は受信側装置のブロック図である。 (4)(5)(6ン:A/D変換回路、(7):デ°−
タ比較兼アドレス選択回路、(8)(14) 、カラー
テーブル用メモリ、〈9):圧縮符号化回路、(10>
 :変調回路、(11) :復調回路、(13):デー
タ選択回路、(14)(15)(16)二り/A変換回
路。
The drawings show an embodiment of a device that employs the transmission processing method of the present invention, and FIG. 1 is a block diagram of the transmitting device, and FIG.
The figure is a block diagram of the receiving side device. (4) (5) (6: A/D conversion circuit, (7): De-
data comparison and address selection circuit, (8) (14), color table memory, <9): compression encoding circuit, (10>
: Modulation circuit, (11) : Demodulation circuit, (13) : Data selection circuit, (14) (15) (16) 2/A conversion circuit.

Claims (2)

【特許請求の範囲】[Claims] (1)送信側からカラー画情報をデジタル信号型式C伝
送し、受信側で再現するための方式であって、 送IRIRII及び受信側に予め数種の色を設定したカ
ラーテーブル用メモリをそれぞれ備え、送信側では上記
メモリを参照して伝送ずへき力9−画情報の各画素毎の
正原色データを前記数種の色一つを示すツー148号に
変換して受信側に伝送し、 受イ8側では上記メモリを参照して受信したツー1′信
号に対応する各画素毎の三原色データを再現リーるよう
にしたカラー画情報の伝送処理方式。
(1) A method for transmitting color image information from the transmitting side in digital signal format C and reproducing it on the receiving side, in which the transmitting side and the receiving side are each equipped with a color table memory in which several types of colors are set in advance. The transmitting side refers to the memory and converts the true primary color data for each pixel of the transmitted image information into 2 No. 148 indicating one of the above several colors, and transmits it to the receiving side. On the A8 side, the color image information transmission processing system refers to the memory and reproduces and reads the three primary color data for each pixel corresponding to the received two-1' signal.
(2)11Q記各メモリには、任意の色の三原色成分の
比率(又は大きさ)を示すデータを1組として、このシ
ータが予め設定された数種の色に対応して複数組格納さ
れ−〔おり、 送信側では伝送ず・\きカラー画情報の三原色データを
各画素毎に上記メモリ内の各組のデータと比較し、この
比較により上記カラー画情報が上記メモリ内の何れの組
のデータに対応するかを示す一コード信号を受信側に伝
送し、 受信側では前記コード信号を受信して該コード信号に対
応する一組のデータを上記メモリから読出し各画素毎の
三原色データとするようにした特許請求の範囲第1項記
載のカラー画情報の伝送処理方式。 <3)i+ii記コード信号は各組のデータが格納され
た前記メモリの番地を示すアドレスコードであることを
特徴とする特許請求の範囲第2項記載のカラー画情報の
伝送処理方式。
(2) Section 11Q In each memory, multiple sets of theta are stored corresponding to several preset colors, with one set of data indicating the ratio (or size) of the three primary color components of an arbitrary color. - [The transmitting side does not transmit the three primary color data of the color image information for each pixel, and compares it with each set of data in the memory above, and by this comparison, it is determined whether the color image information is in any set in the memory. A code signal indicating whether the data corresponds to the data of A method for transmitting color image information according to claim 1, wherein <3) The color image information transmission processing system according to claim 2, wherein the i+ii code signal is an address code indicating an address of the memory where each set of data is stored.
JP22276382A 1982-12-17 1982-12-17 Transmission processing system of color picture information Pending JPS59111472A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22276382A JPS59111472A (en) 1982-12-17 1982-12-17 Transmission processing system of color picture information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22276382A JPS59111472A (en) 1982-12-17 1982-12-17 Transmission processing system of color picture information

Publications (1)

Publication Number Publication Date
JPS59111472A true JPS59111472A (en) 1984-06-27

Family

ID=16787512

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22276382A Pending JPS59111472A (en) 1982-12-17 1982-12-17 Transmission processing system of color picture information

Country Status (1)

Country Link
JP (1) JPS59111472A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0480742A2 (en) * 1990-10-12 1992-04-15 Canon Kabushiki Kaisha Image processing apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0480742A2 (en) * 1990-10-12 1992-04-15 Canon Kabushiki Kaisha Image processing apparatus

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