JPS63151268A - Color edge processor - Google Patents
Color edge processorInfo
- Publication number
- JPS63151268A JPS63151268A JP61299494A JP29949486A JPS63151268A JP S63151268 A JPS63151268 A JP S63151268A JP 61299494 A JP61299494 A JP 61299494A JP 29949486 A JP29949486 A JP 29949486A JP S63151268 A JPS63151268 A JP S63151268A
- Authority
- JP
- Japan
- Prior art keywords
- color
- information
- edge
- hue
- color information
- 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
- 238000006243 chemical reaction Methods 0.000 claims abstract description 16
- 239000003086 colorant Substances 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims description 17
- 238000003708 edge detection Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000000354 decomposition reaction Methods 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 239000000284 extract Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 230000000873 masking effect Effects 0.000 description 1
- 230000033458 reproduction Effects 0.000 description 1
Landscapes
- Dot-Matrix Printers And Others (AREA)
- Color, Gradation (AREA)
- Image Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は多色の文字・図形原稿の鮮明な複製を行なうた
めのカラーエツジ処理装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a color edge processing device for making clear reproductions of multicolor text and graphic originals.
従来の技術
多色の文字や図形ドキーメンテーションを対象として画
像入力を行なう場合、第4図に示すよう3 ・−・−・
に多色原稿401をTVカメラやスキャナー等で読み取
り、3色分解装置402で(R(レッド)、G(グリー
ン)、B (ブルー))、又はto(シアン)、M(マ
ゼンタ)、Y(イエロー))の3次元情報に分解する。Conventional technology When performing image input for multicolor text and figure dokeymentation, as shown in Fig. 4, a multicolor original 401 is read with a TV camera, scanner, etc., and separated into three colors. The device 402 decomposes it into three-dimensional information (R (red), G (green), B (blue)), or to (cyan), M (magenta), Y (yellow)).
そして、多色原稿401をN色とすると、色分離手段4
03ではN色の統計的性質に基づき、N色の特徴パラメ
ータによりN色に色分離(カラーマスキング演算処理)
することが一般に行なわれている。次に、色分離された
情報はカラーの記録装置404に供給され、(C!、
M、 Y、 B)のインクによシ複写物405を
得る。If the multicolor original 401 has N colors, the color separation means 4
In 03, based on the statistical properties of N colors, color separation into N colors using characteristic parameters of N colors (color masking calculation processing)
It is commonly done. Next, the color-separated information is supplied to a color recording device 404 (C!,
A copy 405 is obtained using ink of M, Y, B).
発明が解決しようとする問題点
さて、多色の文字や図形ドキュメンテーションを対象と
して画像入力する場合には、解像度が充分ならば原画の
情報は失われないが、第4図に示すような3色分解装置
402によシ多色原稿401を読み取シ複製するシステ
ムでは、読み塩シロ径(ア、パーチャ)により色文字等
におけるエツジ部分において中間調を含む色情報となる
だめ、色ずれや色の判別誤りが発生しやすい。Problems to be Solved by the Invention When inputting an image for multicolored text or graphic documentation, if the resolution is sufficient, the information of the original image will not be lost, but if the image is input in three colors as shown in Figure 4, the information in the original image will not be lost. In a system that reads and duplicates a multicolor original 401 using the decomposition device 402, color information including halftones is produced at the edges of colored characters due to the perforation diameter (aperture), resulting in color shift and color distortion. Discrimination errors are likely to occur.
本発明は上記従来技術に鑑み、上記の色文字や図形にお
けるエツジ部分において読み取り口径(アパーチャー)
による色ずれや色の判別誤シを少なくするものである。In view of the above-mentioned prior art, the present invention has been developed by adjusting the reading aperture (aperture) at the edge portion of the above-mentioned colored characters and figures.
This reduces color shift and misjudgment of colors.
問題点を解決するための手段
本発明は色文字や図形のエツジ部分における色情報を読
み取って3原色に分解する3色分解系と前記3色分解系
の出力信号を色相と明度情報に変換する色変換手段と、
前記色変換手段の出力情報からエツジの検出及び方向を
求める処理部と、エツジ部を中心に近接するN×M個(
N、 Mは整数値)の画素の色情報を蓄積する記憶手
段と、前記エツジ部分の色判別を行なう色判別手段とを
設けたものである。Means for Solving the Problems The present invention includes a three-color separation system that reads color information in the edge portions of colored characters and figures and separates them into three primary colors, and converts the output signals of the three-color separation system into hue and brightness information. color conversion means;
a processing section that detects edges and determines their directions from the output information of the color conversion means;
The image forming apparatus is provided with a storage means for accumulating color information of pixels (N and M are integer values) and a color discrimination means for discriminating the color of the edge portion.
作用
本発明は上記構成により、色変換を行ない色相、明度情
報を用いることによシ、エツジ方向成分抽出や色情報の
蓄積が容易に、かつ簡単にでき、また多色の色文字や図
形におけるエツジ部分における色ずれや色の判別誤りを
少なくできる。Effects of the present invention With the above configuration, by performing color conversion and using hue and brightness information, it is possible to extract edge direction components and accumulate color information easily and easily, and it is also possible to easily and easily extract edge direction components and store color information in multicolor characters and figures. Color shift and color discrimination errors at edge portions can be reduced.
51・−/
実施例
以下、図面を参照しながら本発明の一実施例について説
明する。51.-/ Example An example of the present invention will be described below with reference to the drawings.
第1図は本発明の一実施例におけるカラーエツジ処理装
置のブロック結線図である。FIG. 1 is a block diagram of a color edge processing apparatus according to an embodiment of the present invention.
第1図において、101は多色原稿102をTVカメラ
やスキャナ等より読み込んで(R,G、 B)や(0
,M、 Y)等の3W色に分解する3色分解系、10
3は3色分解系102から送出される3原色(R,G、
B)や(0,M、 Y)等から色変換を行なって
色相、明度、彩度の情報に変換する色変換手段、104
は色変換手段103から送出される色相と明度情報を一
時記憶する色情報メモリ、105は色情報メモリ104
から色相あるいは明度情報を入力してエツジの検出及び
方向抽出を行なう処理部、106は処理部105のエツ
ジ検出信号及びエツジ方向情報信号により色情報メモリ
104の適切な画素の色情報を引き出してエツジ部分の
色情報の置き換えを行なう色判別手段である。In FIG. 1, 101 reads a multicolor original 102 using a TV camera, scanner, etc.
, M, Y), etc., 3-color separation system, 10
3 is the three primary colors (R, G,
A color conversion means 104 that performs color conversion from B), (0, M, Y), etc. to information on hue, brightness, and saturation;
105 is a color information memory that temporarily stores the hue and brightness information sent from the color conversion means 103; 105 is a color information memory 104;
A processing section 106 inputs hue or brightness information from the processing section 105 to perform edge detection and direction extraction. This is a color discrimination means that replaces the color information of a portion.
上記構成において、以下その動作を説明する。The operation of the above configuration will be explained below.
6 ・・−7
まず、一般的に彩度の高い多色原稿102を用いると、
3色分解系101で読み取っだ3刺激値色情報(R,G
、 B)をそのまま使用しないで、色変換手段103
により色変換を行ない色相、明度、彩度の情報に変換す
る。この3つの情報のうち彩度の情報を使わず、明度信
号又は、色相信号を処理部105に送出して色情報メモ
IJ 104を介してエツジ検出及びエツジの方向を抽
出する。また、エツジ部を中心に近接するN×M個の画
素の色情報メモリ104には、次々に色相と明度情報が
貯わえられている。この色情報メモIJ 104は、第
2図に示すように3色分解系102の入力装置(TVカ
メラやスキャナ)の読み取り口(アパーチャ)がエツジ
部の両側の色情報を蓄積するように設定する。6...-7 First, when using a multicolor original 102 with generally high saturation,
Tristimulus value color information (R, G) read by the 3-color separation system 101
, B) without using it as is, the color conversion means 103
The color is converted into hue, brightness, and saturation information. Among these three pieces of information, the saturation information is not used, and the brightness signal or the hue signal is sent to the processing unit 105 to detect edges and extract the edge direction via the color information memo IJ 104. Further, hue and brightness information are stored one after another in the color information memory 104 of N×M pixels adjacent to the edge portion. This color information memo IJ 104 is set so that the reading port (aperture) of the input device (TV camera or scanner) of the three-color separation system 102 accumulates color information on both sides of the edge portion, as shown in FIG. .
処理部104がエツジを検出し、エツジの方向を抽出す
る情報を色判別手段106に送出されると、色判別手段
106は、エツジ方向の情報に基づき色情報メモリ10
4の適切な画素の色情報を色情報検出信号として検索し
、置き換えてエツジ部分の色情報とする。When the processing unit 104 detects an edge and sends information for extracting the edge direction to the color discrimination means 106, the color discrimination means 106 extracts the edge direction from the color information memory 10 based on the edge direction information.
The color information of the appropriate pixel No. 4 is searched as the color information detection signal and replaced with the color information of the edge portion.
7 l−7 次に本発明のさらに具体的実施例について説明する。7 l-7 Next, more specific embodiments of the present invention will be described.
第3図に示すように、多色の文字や図形を読み取った第
1図に示すように3色分解系101より送出された3色
分解信号100を、色相、彩度、明度を事前に色変換し
算出したものをROM (読出しオンリーメモIJ)2
00に入れておき、3色分解信号100に応じた色変換
信号(色相信号101、明度信号102)を出力させ色
情報をマルチプレクサ210により分配しエツジ部を中
心に5×5の近傍画素を蓄積する1%AM (書き込み
読み出し自由なメモリ)201に入れる。本実施例では
、近傍5×5の画素で読み取りアパチャーが完全にエツ
ジを横切るものとする。R,A M 201の明度情報
を、読み取り画素と隣接する8つの画素の部分をエツジ
の検出と方向抽出を行なう処理部203に入れて、エツ
ジ部分の検出信号103とエツジ方向情報104を算出
する。エツジ部分に読取り画素があたると工・ノジ検出
信号103でエツジの検出を色判別装置202に伝達し
、エツジ方向情報104によりRA M 201より適
切な色情報を引き出し、エツジ部分の色情報105を置
き換える。As shown in FIG. 3, the three-color separation signal 100 sent from the three-color separation system 101 as shown in FIG. The converted and calculated data is stored in ROM (read-only memory IJ) 2
00, the color conversion signal (hue signal 101, brightness signal 102) corresponding to the three color separation signal 100 is output, the color information is distributed by the multiplexer 210, and 5 x 5 neighboring pixels are accumulated around the edge part. 1% AM (read/write free memory) 201. In this embodiment, it is assumed that the reading aperture completely crosses the edge with 5×5 pixels in the vicinity. The brightness information of R, A M 201 is input into a processing unit 203 that performs edge detection and direction extraction for a portion of eight pixels adjacent to the read pixel, and a detection signal 103 and edge direction information 104 for the edge portion are calculated. . When a reading pixel hits an edge portion, the detection of the edge is transmitted to the color discrimination device 202 using the edge detection signal 103. Appropriate color information is extracted from the RAM 201 using the edge direction information 104, and the color information 105 of the edge portion is transmitted to the color discrimination device 202. replace.
発明の効果
本発明は以上のように色文字や図形のエツジ部分におけ
る色情報を読み取って3原色に分解する3色分解系と前
記3色分解系の出力信号を色相と明度情報に変換する色
変換手段と、前記色変換手段の出力情報からエツジの検
出及び方向を求める処理部と、エツジ部を中心に近接す
るN×M個(N。Effects of the Invention As described above, the present invention provides a three-color separation system that reads color information at the edge of a color character or figure and separates it into three primary colors, and a color separation system that converts the output signal of the three-color separation system into hue and brightness information. A conversion means, a processing section that detects edges and determines the direction from the output information of the color conversion means, and N×M (N.
Mは整数値)の画素の色情報を蓄積する記憶手段と、前
記エツジ部分の色判別を行なう色判別手段とを設けるこ
とにより、多色の色文字や図形におけるエツジ部分の色
ずれや色の判別誤りを大巾に少なくできる。By providing a storage means for accumulating color information of pixels (M is an integer value) and a color discrimination means for discriminating the color of the edge portion, it is possible to prevent color shift and color misalignment at the edge portions of multicolored characters and figures. Discrimination errors can be greatly reduced.
第1図は本発明の一実施例におけるカラーエツジ処理装
置のブロック結線図、第2図は同装置の多色原稿読み取
り状態を示す概念図、第3図は同装置のさらに具体的構
成を示すブロック結線図、第4図は従来の画像処理装置
のブロック結線図で9 ・\−7
ある。
101・・・3色分解系、103・・・色変換手段、1
04・・・色情報メモリ、105・・・処理部、106
・・・色判別手段。FIG. 1 is a block wiring diagram of a color edge processing device according to an embodiment of the present invention, FIG. 2 is a conceptual diagram showing the multicolor document reading state of the device, and FIG. 3 is a block diagram showing a more specific configuration of the device. Wiring diagram: Fig. 4 is a block wiring diagram of a conventional image processing device. 101...Three color separation system, 103...Color conversion means, 1
04... Color information memory, 105... Processing unit, 106
... Color discrimination means.
Claims (5)
取って3原色に分解する3色分解系と、前記3色分解系
の出力信号を色相と明度情報に変換する色変換手段と、
前記色変換手段の出力情報からエッジの検出及び方向を
求める処理部と、エッジ部を中心に近接するN×M個(
N、Mは整数値)の画素の色情報を蓄積する記憶手段と
、前記エッジ部分の色判別を行なう色判別手段により構
成することを特徴とするカラーエッジ処理装置。(1) a three-color separation system that reads color information in edge portions of color characters and figures and separates it into three primary colors; and a color conversion means that converts the output signal of the three-color separation system into hue and brightness information;
a processing unit that detects edges and determines their directions from the output information of the color conversion means;
1. A color edge processing device comprising: storage means for accumulating color information of pixels (N, M are integer values); and color discrimination means for discriminating the color of the edge portion.
段の出力である色相情報か明度情報のどちらか一方で行
なうことを特徴とする特許請求の範囲第1項記載のカラ
ーエッジ処理装置。(2) The color edge processing device according to claim 1, wherein the processing section performs edge detection and edge direction using either hue information or brightness information output from the color conversion means.
報の蓄積する記憶手段は、色情報を色相情報と明度情報
に分けて貯わえることを特徴とする特許請求の範囲第1
項記載のカラーエッジ処理装置。(3) The storage means for accumulating color information of N×M pixels adjacent to the edge portion stores the color information separately into hue information and brightness information. 1
The color edge processing device described in Section 1.
報は、3色分解系の読み取口が、エッジ部を中心とした
両側の色情報が含まれるようにNとMを設定することを
特徴とする特許請求の範囲第1項記載のカラーエッジ処
理装置。(4) For the color information of N×M pixels adjacent to the edge area, N and M are set so that the reading port of the three-color separation system includes color information on both sides of the edge area. A color edge processing device according to claim 1, characterized in that:
れるエッジの検出信号と方向信号により、エッジ部を中
心に近接するN×M個の画素の色情報の中から、色情報
を検索し、エッジ部の色情報とすることを特徴とする特
許請求の範囲第1項記載のカラーエッジ処理装置。(5) Using the edge detection signal and direction signal output from the edge detection and direction processing unit, search for color information from among the color information of N×M pixels adjacent to the edge portion. The color edge processing device according to claim 1, wherein the color information is the color information of the edge portion.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61299494A JPS63151268A (en) | 1986-12-16 | 1986-12-16 | Color edge processor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61299494A JPS63151268A (en) | 1986-12-16 | 1986-12-16 | Color edge processor |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63151268A true JPS63151268A (en) | 1988-06-23 |
Family
ID=17873297
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP61299494A Pending JPS63151268A (en) | 1986-12-16 | 1986-12-16 | Color edge processor |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63151268A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0382565A2 (en) * | 1989-02-09 | 1990-08-16 | Fujitsu Limited | Color picture image processing system |
US5742410A (en) * | 1993-06-20 | 1998-04-21 | Fuji Xerox Co., Ltd. | Color image processing apparatus capable of correcting a color deviation by converting only chroma signals |
-
1986
- 1986-12-16 JP JP61299494A patent/JPS63151268A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0382565A2 (en) * | 1989-02-09 | 1990-08-16 | Fujitsu Limited | Color picture image processing system |
US5126834A (en) * | 1989-02-09 | 1992-06-30 | Fujitsu Limited | Color image processing system with hue processing and modification |
US5742410A (en) * | 1993-06-20 | 1998-04-21 | Fuji Xerox Co., Ltd. | Color image processing apparatus capable of correcting a color deviation by converting only chroma signals |
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