JPH0226832B2 - - Google Patents
Info
- Publication number
- JPH0226832B2 JPH0226832B2 JP56084714A JP8471481A JPH0226832B2 JP H0226832 B2 JPH0226832 B2 JP H0226832B2 JP 56084714 A JP56084714 A JP 56084714A JP 8471481 A JP8471481 A JP 8471481A JP H0226832 B2 JPH0226832 B2 JP H0226832B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- light
- photoelectric conversion
- output
- color signal
- 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.)
- Expired - Lifetime
Links
- 238000006243 chemical reaction Methods 0.000 claims description 17
- 230000003111 delayed effect Effects 0.000 claims description 9
- 230000000903 blocking effect Effects 0.000 claims description 2
- 230000015572 biosynthetic process Effects 0.000 claims 2
- 238000010586 diagram Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/46—Colour picture communication systems
- H04N1/48—Picture signal generators
- H04N1/486—Picture signal generators with separate detectors, each detector being used for one specific colour component
- H04N1/488—Picture signal generators with separate detectors, each detector being used for one specific colour component using beam-splitters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/46—Colour picture communication systems
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
- Color Image Communication Systems (AREA)
Description
【発明の詳細な説明】
本発明はフアクシミリ装置、デジタルコピー装
置等において、多色原稿読み取りを行なう色判別
機能を有する画像入力装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image input device for use in facsimile machines, digital copying machines, etc., having a color discrimination function for reading multicolor originals.
多色判別機能を有する画像入力装置の例として
黒赤２色画像入力装置をとつて説明すると、第１
図で示す様に原稿１で反射した光源２からの光
ミラー３を介し、レンズ４で集束させ色分解系５
により長波長光、短波長光に分光しそれぞれ長波
長用自己走査型光電変換素子６、短波長用自己走
査型光電変換素子７に結像させる。 Taking a black and red two-color image input device as an example of an image input device having a multicolor discrimination function, the first
As shown in the figure, the light from the light source 2 reflected by the original 1 is focused by the lens 4 through the mirror 3, and the color separation system 5
The light is separated into long wavelength light and short wavelength light, and images are formed on a self-scanning photoelectric conversion element 6 for long wavelengths and a self-scanning photoelectric conversion element 7 for short wavelengths, respectively.
そして、２つの自己走査型光電変換素子からの
電気信号をそれぞれ増幅器８，９により増幅した
長波長アナログ信号Ａ１、短波長アナログ信号Ａ
２を２値化回路１０，１１によりそれぞれ特定の
スライスレベルＳ１，Ｓ２で２値化し長波長デジ
タル信号Ｂ１、短波長デジタル信号Ｂ２を得てこ
れを多色判別回路１２でデコードすることで黒信
号Ｃ１、赤信号Ｃ２を取り出す方法が考えられ
る。第１図は上記の方法において黒原稿部１
３、赤原稿部１４を持つ原稿を主走査方向にＸ位
置を走査した時の理想的な各信号の波形を示した
ものである。 A long wavelength analog signal A1 and a short wavelength analog signal A are obtained by amplifying electric signals from two self-scanning photoelectric conversion elements by amplifiers 8 and 9, respectively.
2 is binarized at specific slice levels S1 and S2 by binarization circuits 10 and 11, respectively, to obtain a long wavelength digital signal B1 and a short wavelength digital signal B2, which are decoded by a multicolor discrimination circuit 12 to produce a black signal. One possible method is to take out C1 and red light C2. Figure 1 shows the black original portion 1 in the above method.
3. Ideal waveforms of each signal are shown when the document having the red document portion 14 is scanned at the X position in the main scanning direction.
しかし、現実には２つの光電変換素子の位置調
整、ミラーのペント調整等の狂いにより第２図の
またはで示す様にある特定の色（この場合は
黒）のエツジ部１５において他色（この場合は
赤）の色信号に主走査方向で数画素分の誤信号１
６が出力されてしまう問題点がある。また、副走
査方向においても同様である。上記の問題点が生
じない様に機械的に調整を行なう事は非常に困難
な作業で大変な労力を要し、また頻繁に調整を行
なわなければならない欠点があつた。 However, in reality, due to errors in the position adjustment of the two photoelectric conversion elements, the mirror pent adjustment, etc., as shown by or in FIG. In the case of red), there is an error signal of several pixels in the main scanning direction in the color signal1.
There is a problem that 6 is output. The same applies to the sub-scanning direction. Mechanically making adjustments to prevent the above problems from occurring is extremely difficult and requires a great deal of effort, and there is also the disadvantage that adjustments must be made frequently.
本発明の目的はこれらの問題点を電気的な色信
号の補正制御回路を付加することにより除去し、
原稿に忠実な画信号を得ることにあり、詳しく
は、原稿画像からの反射光を互いに異なる波長の
光に分光する分光手段と、前記分光手段により分
光された異なる波長の光を光電変換することによ
り異なる波長の光の夫々に対応する複数の波長信
号を出力する複数の自己走査型光電変換素子と、
前記複数の光電変換素子から出力された前記複数
の波長信号をデコードすることにより複数の色信
号を形成する形成手段と、前記形成手段により形
成された特定の色信号を複数ライン分遅延する遅
延手段と、前記形成手段により手段された他の色
信号の出力をゲート信号の入力期間に渡つて遮断
するゲート手段とを有し、前記遅延手段により遅
延された特定の色信号を前記ゲート手段にゲート
信号として入力することにより、前記複数の光電
変換素子の副走査方向に関する位置ずれに起因し
て前記形成手段により前記特定の色信号の端部に
形成される前記他の色信号を除去する画像入力装
置を提供するものである。 The purpose of the present invention is to eliminate these problems by adding an electrical color signal correction control circuit.
The objective is to obtain an image signal that is faithful to the original, and more specifically, it includes a spectroscopic means for separating light reflected from the original image into light of different wavelengths, and photoelectric conversion of the light of different wavelengths separated by the spectroscopic means. a plurality of self-scanning photoelectric conversion elements that output a plurality of wavelength signals respectively corresponding to light of different wavelengths;
A forming means for forming a plurality of color signals by decoding the plurality of wavelength signals output from the plurality of photoelectric conversion elements, and a delay means for delaying a specific color signal formed by the forming means by a plurality of lines. and gate means for blocking the output of other color signals produced by the forming means over an input period of the gate signal, and gate means for gating the specific color signal delayed by the delay means to the gate means. Image input that removes the other color signal formed at the end of the specific color signal by the forming means due to positional deviation of the plurality of photoelectric conversion elements in the sub-scanning direction by inputting it as a signal. It provides equipment.
以下、本発明の一実施例を図面に従い説明す
る。 An embodiment of the present invention will be described below with reference to the drawings.
まず、本発明の実施例の説明に先立つて、第３
図を用いて本発明の原理を説明する。即ち、第３
図は、主走査方向の色信号を補正する補正回路図
である。図において、ａは黒色信号、ｂは赤色信
号、１７はｎ画素分の黒色信号遅延回路、１８は
ｎ画素分の赤色信号遅延回路、１９はｍ画素分の
黒色信号遅延回路、２０はオア回路、２１はゲー
ト回路である。尚、本実施例においてはｎ＝３、
ｍ＝２としている。第３図の各部の信号波形図を
第４図に示す。 First, prior to explaining the embodiments of the present invention, the third
The principle of the present invention will be explained using figures. That is, the third
The figure is a correction circuit diagram for correcting color signals in the main scanning direction. In the figure, a is a black signal, b is a red signal, 17 is a black signal delay circuit for n pixels, 18 is a red signal delay circuit for n pixels, 19 is a black signal delay circuit for m pixels, 20 is an OR circuit , 21 is a gate circuit. Note that in this example, n=3,
It is assumed that m=2. FIG. 4 shows a signal waveform diagram of each part in FIG. 3.
黒色信号ａは遅延回路１７，１９で遅延され、
１画素遅延信号a1、２画素遅延信号a2，…，５画
素遅延信号a5が得られる。 The black signal a is delayed by delay circuits 17 and 19,
A 1-pixel delayed signal a 1 , a 2-pixel delayed signal a 2 , . . . , a 5-pixel delayed signal a 5 are obtained.
信号a1〜a5はオア回路２０に入力され、信号ｃ
が得られる。また赤色信号ｂは遅延回路１８で遅
延され、信号b′が得られる。ゲート回路２１は信
号ｃがＨレベルの間は信号b′がＨレベルなるのを
阻止する。従つて誤信号ｄ，ｅを含む赤色信号ｂ
は誤信号ｄ，ｅを含まない赤色信号b″に補正変換
される。つまり、黒色信号ａの出力レベルがＨレ
ベルの前後２画素以内の赤色信号ｂはすべてＬレ
ベルとなる。 The signals a1 to a5 are input to the OR circuit 20, and the signal c
is obtained. Further, the red signal b is delayed by a delay circuit 18 to obtain a signal b'. The gate circuit 21 prevents the signal b' from reaching the H level while the signal c is at the H level. Therefore, the red signal b including the erroneous signals d and e
is corrected and converted into a red signal b'' that does not include the erroneous signals d and e. That is, the red signal b within two pixels before and after the output level of the black signal a becomes the H level, all become the L level.
上記の説明では色信号の遅延画素数をｎ＞０、
ｍ＞０と設定したが、ｎもしくはｍの一方が０の
場合はそれに対応する側のデータ保持回路を取り
除いて黒色信号の出力レベルの変化点の前または
後のみ赤色画素の補正をしてもよい。 In the above explanation, the number of delayed pixels of the color signal is n>0,
Although m>0 is set, if either n or m is 0, the data holding circuit on the corresponding side can be removed and the red pixel can be corrected only before or after the point of change in the output level of the black signal. good.
以上の原理を適用した本発明の実施例を以下に
説明する。即ち、第５図は、副走査方向において
色信号ａにより色信号ｂを補正制御する場合の副
走査方向補正制御回路の構成を示したものであ
る。副走査方向の補正制御に関しては、同一副走
査線上の各画素に対してデータ保持をし主走査方
向の時と同様に処理を行なう為に主走査方向の１
ライン分のデータ保持回路を（２×ｎ＋ｍ）個使
用すること以外は主走査方向補正制御回路と全て
同じである。 Examples of the present invention to which the above principle is applied will be described below. That is, FIG. 5 shows the configuration of a sub-scanning direction correction control circuit in the case where color signal b is corrected and controlled by color signal a in the sub-scanning direction. Regarding correction control in the sub-scanning direction, data is held for each pixel on the same sub-scanning line and processing is performed in the same way as in the main scanning direction.
Everything is the same as the main scanning direction correction control circuit except that (2×n+m) data holding circuits for lines are used.
また上記の主走査方向補正制御回路と副走査方
向補正制御回路の２つを組み合わせることによ
り、主走査方向・副走査方向ともに補正制御を行
なうことができる。 Further, by combining the above-mentioned main scanning direction correction control circuit and sub-scanning direction correction control circuit, correction control can be performed in both the main scanning direction and the sub-scanning direction.
以上説明した様に、本発明によると、原稿画像
からの反射光を互いに異なる波長の光に分光した
異なる波長の光を、複数の自己走査型光電変換素
子により光電変換することにより得た複数の波長
信号をデコードして、複数の色信号を形成する構
成において、特定の色信号を複数ライン分遅延し
たものをゲート信号として用い、このゲート信号
の入力期間に渡つて他の色信号の出力を遮断する
ので、複数の光電変換素子の副走査方向に関する
位置ずれに起因して特定の色信号の端部に誤つて
形成される他の色信号を確実に除去することがで
き、また、誤つて形成される色信号を除去するこ
とによる信頼性の向上ばかりでなく、複数の自己
走査型光電変換素子等の配置に関わる機械的な調
整も極めて容易となり作業労力も軽減することが
できる。 As described above, according to the present invention, a plurality of light beams obtained by photoelectrically converting light of different wavelengths, which are obtained by splitting light reflected from an original image into light of different wavelengths, using a plurality of self-scanning photoelectric conversion elements, is provided. In a configuration that decodes a wavelength signal to form multiple color signals, a specific color signal delayed by multiple lines is used as a gate signal, and other color signals are output during the input period of this gate signal. Since the signal is blocked, it is possible to reliably remove other color signals that are erroneously formed at the end of a specific color signal due to positional deviations in the sub-scanning direction of multiple photoelectric conversion elements. Not only is reliability improved by removing the formed color signal, but also mechanical adjustment related to the arrangement of a plurality of self-scanning photoelectric conversion elements etc. is extremely easy, and work effort can be reduced.
第１図は黒赤２色画像入力装置の概略図とその
波形図、第２図は光電変換素子の位置ズレ・レン
ズのピント狂い等による誤信号の出力された波形
図、第３図は本発明の一実施例を説明するための
主走査方向補正制御回路図、第４図は第３図の動
作を示すための波形図、第５図は副走査方向補正
制御回路図である。
図中、１…原稿、２…光源、３…ミラー、４…
レンズ、５…色分解系、６…長波長用自己走査型
光電変換素子、７…短波長用自己走査型光電変換
素子。
Figure 1 is a schematic diagram of a black-red two-color image input device and its waveform diagram, Figure 2 is a waveform diagram of an erroneous signal output due to misalignment of the photoelectric conversion element, out-of-focus of the lens, etc., and Figure 3 is a diagram of the output of the main image. FIG. 4 is a waveform diagram showing the operation of FIG. 3, and FIG. 5 is a sub-scanning direction correction control circuit diagram for explaining an embodiment of the invention. In the figure, 1... original, 2... light source, 3... mirror, 4...
Lens, 5... Color separation system, 6... Self-scanning photoelectric conversion element for long wavelengths, 7... Self-scanning photoelectric conversion element for short wavelengths.
Claims (1)
光に分光する分光手段と、 前記分光手段により分光された異なる波長の光
を光電変換することにより異なる波長の光の夫々
に対応する複数の波長信号を出力する複数の自己
走査型光電変換素子と、 前記複数の光電変換素子から出力された前記複
数の波長信号をデコードすることにより複数の色
信号を形成する形成手段と、 前記形成手段により形成された特定の色信号を
複数ライン分遅延する遅延手段と、 前記形成手段により形成された他の色信号の出
力をゲート信号の入力期間に渡つて遮断するゲー
ト手段とを有し、 前記遅延手段により遅延された特定の色信号を
前記ゲート手段にゲート信号として入力すること
により、前記複数の光電変換素子の副走査方向に
関する位置ずれに起因して前記形成手段により前
記特定の色信号の端部に形成される前記他の色信
号を除去することを特徴とする画像入力装置。[Scope of Claims] 1. A spectroscopic device that separates reflected light from an original image into light of different wavelengths, and photoelectrically converts the light of different wavelengths separated by the spectroscopic device into light of different wavelengths, respectively. a plurality of self-scanning photoelectric conversion elements that output a plurality of corresponding wavelength signals; a forming means that forms a plurality of color signals by decoding the plurality of wavelength signals output from the plurality of photoelectric conversion elements; A delay means for delaying a specific color signal formed by the forming means by a plurality of lines, and a gate means for blocking output of other color signals formed by the forming means over an input period of the gate signal. By inputting the specific color signal delayed by the delay means to the gate means as a gate signal, the formation means causes the formation means to output the specific color signal due to the positional deviation in the sub-scanning direction of the plurality of photoelectric conversion elements. An image input device characterized in that the other color signal formed at the end of the color signal is removed.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56084714A JPS57199367A (en) | 1981-06-01 | 1981-06-01 | Picture input device |
| FR8209360A FR2507037B1 (en) | 1981-06-01 | 1982-05-28 | COLOR IMAGE READING APPARATUS |
| DE19823220298 DE3220298A1 (en) | 1981-06-01 | 1982-05-28 | COLOR IMAGE READER |
| GB08215834A GB2102239B (en) | 1981-06-01 | 1982-06-01 | Facsimile method |
| US06/842,763 US4694502A (en) | 1981-06-01 | 1986-03-21 | Color image reading apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56084714A JPS57199367A (en) | 1981-06-01 | 1981-06-01 | Picture input device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57199367A JPS57199367A (en) | 1982-12-07 |
| JPH0226832B2 true JPH0226832B2 (en) | 1990-06-13 |
Family
ID=13838331
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56084714A Granted JPS57199367A (en) | 1981-06-01 | 1981-06-01 | Picture input device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57199367A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58186254A (en) * | 1982-04-23 | 1983-10-31 | Fuji Xerox Co Ltd | Picture information reader |
-
1981
- 1981-06-01 JP JP56084714A patent/JPS57199367A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57199367A (en) | 1982-12-07 |
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