JPS61148959A - Reading method of picture information - Google Patents

Reading method of picture information

Info

Publication number
JPS61148959A
JPS61148959A JP59271217A JP27121784A JPS61148959A JP S61148959 A JPS61148959 A JP S61148959A JP 59271217 A JP59271217 A JP 59271217A JP 27121784 A JP27121784 A JP 27121784A JP S61148959 A JPS61148959 A JP S61148959A
Authority
JP
Japan
Prior art keywords
image
light sources
light
time
light receiving
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
JP59271217A
Other languages
Japanese (ja)
Inventor
Noriyuki Shimano
嶋野　法之
Shigeo Murakami
繁男 村上
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.)
Dainippon Screen Manufacturing Co Ltd
Original Assignee
Dainippon Screen Manufacturing 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 Dainippon Screen Manufacturing Co Ltd filed Critical Dainippon Screen Manufacturing Co Ltd
Priority to JP59271217A priority Critical patent/JPS61148959A/en
Priority to GB08520720A priority patent/GB2169167B/en
Priority to DE19853531339 priority patent/DE3531339A1/en
Publication of JPS61148959A publication Critical patent/JPS61148959A/en
Pending legal-status Critical Current

Links

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
    • H04N1/40—Picture signal circuits
    • H04N1/40056—Circuits for driving or energising particular reading heads or original illumination means
    • 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
    • H04N1/024—Details of scanning heads ; Means for illuminating the original
    • H04N1/028—Details of scanning heads ; Means for illuminating the original for picture information pick-up

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Facsimile Scanning Arrangements (AREA)
  • Image Input (AREA)

Abstract

PURPOSE:To eliminate the need for a color compensation filter and to simplify an operation by controlling individually the light time of plural light sources within the accumulation time of an accumulating type photodetector. CONSTITUTION:A color original picture 1 is formed and projected on a linear array sensor 5, scanned in a main scanning direction by the linear array sensor 5, subscanning is executed and the entire face of an original 1 is subject to photoelectric scanning sequentially. The light image at each moment subjects to the main scanning by each accumulating type photodetector constituted of the linear array sensor 5 is subjected to photoelectric conversion and a picture signal at every one column is read. A signal to copy a required monochroic picture image is obtained by allowing a control circuit 2 to control individually each light time of three color light sources 3R, 3G, 3B within the accumulation time of the accumulating type photodetector.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、カラー原画から白黒などの単色複製画像を作
成するのに用いられるファクシミリや単色スキャナのよ
うな画像走査記録装置に適用することができる画像情報
の読取り装置に関し、さらに詳しくは主波長の異なる複
数の光源でカラー原画を照明し、結像光学系によりカラ
ー原画の光像を蓄積型受光素子で構成したアレイセンサ
上に結像し、この光像を充電変換して単色画像用信号を
得るようにした画像情報の読取り方法に関する。[Detailed Description of the Invention] <Industrial Application Field> The present invention can be applied to image scanning and recording devices such as facsimiles and monochrome scanners used to create monochrome reproduction images such as black and white from color originals. More specifically, the image information reading device illuminates a color original image with a plurality of light sources with different dominant wavelengths, and uses an imaging optical system to form a light image of the color original onto an array sensor composed of storage type light receiving elements. , relates to a method for reading image information in which a monochromatic image signal is obtained by charge-converting this optical image.

、　　　　〈発明の技術背景〉　　。, <Technical background of the invention>.

近年、カラー写真の普及によりデザイン、複写、印刷等
に用いられる原画としてカラー原画が多用されている。2. Description of the Related Art In recent years, with the spread of color photography, color original images are often used as original images for use in designs, copying, printing, and the like.

これらの中で、カラー原画から単色の複製画像を作成す
ることがよく行なわれる。例えば暖色系−色による単色
写真画像を形成しデザイン上の効果をねらったり、また
白黒による写真画像を形成しフントラストの変化による
効果をねらう等、趣向を凝らした複製画像を作成したり
、あるいは原画として白黒写真で足りる場合であっても
当該原画がカラー写真であるため、それを白黒による複
製画像に変換することが行われる。Among these, it is often done to create a monochromatic duplicate image from a color original image. For example, creating a monochromatic photographic image using warm colors to achieve a design effect, or creating a black and white photographic image and aiming for an effect due to a change in the contrast, or creating an elaborate reproduction image. Even if a black and white photograph is sufficient as the original image, since the original image is a color photograph, it is converted into a black and white reproduction image.

〈従来技術〉 カラー原画から単色複製画像を得る場合に、例えばカラ
ー原画を目で見て感じるのと同様の調子再現特性を得る
ためには、原画を照明する光源と原画を結像投影する受
光素子又は感光材料と組合せたときに、人間の分光視感
度特性に合致する総合分光感度特性を与えるような、色
補償フィルタを用いることが一般に行われている。<Prior art> When obtaining a monochromatic reproduction image from a color original, for example, in order to obtain tone reproduction characteristics similar to those felt when looking at the color original, a light source that illuminates the original and a light receiver that forms an image and projects the original are required. It is common practice to use a color compensation filter that, when combined with a device or photosensitive material, provides an overall spectral sensitivity characteristic that matches the spectral visibility characteristic of humans.

また、発色の異なる２種のレーザ光を用いてカラー原画
を走査し、所望に応じてそれらの光の強さの比率を制御
して単色複製画像を得ることも行われている。It is also practiced to scan a color original image using two types of laser beams with different colors, and to obtain a monochrome duplicate image by controlling the ratio of the intensities of these beams as desired.

〈発明が解決しようとしている問題点〉上記従来技術に
おいて説明した色補償フィルタを用いる方法においては
、原画の色調が正常な場合には問題はないが、カラー原
画の発色の偏りがある場合や、複製画像の階調について
特殊な要求がある場合に備えて色調の異なる種々の色補
償フィルタを用意する必要があり、また、それらのフィ
ルタの交換に手間を要するとともに、当該色補償フィル
タの退色をも常に考慮しなければならない。<Problems to be Solved by the Invention> In the method using the color compensation filter described in the above-mentioned prior art, there is no problem when the color tone of the original image is normal, but when the color tone of the color original image is biased, It is necessary to prepare various color compensation filters with different tones in case there are special requirements regarding the gradation of the reproduced image, and it is also time-consuming to replace these filters, and it is difficult to prevent the color compensation filter from fading. must always be considered.

また、２種のレーザ光を用いる方法においては、装置の
コストが高価につく上に、人間の視感度特性に正しく合
致させることは困難である６また、赤、緑、青の３色の
レーザ光を用いれば、より精度の良い階調制御が可能で
あるが、回路構成及び照明機構が複雑になりいっそうコ
スト高につくこととなる。In addition, in the method of using two types of laser beams, the cost of the device is high and it is difficult to match the visibility characteristics of humans correctly6. If light is used, more accurate gradation control is possible, but the circuit configuration and illumination mechanism become complicated, resulting in higher costs.

本発明はこのような事情に鑑みてなされたもので、その
目的は色調の異なる多数の色補償フィルタを用意するこ
とを要せず、しかも、・回路構成及び照明機構が簡単で
、ｍｌｌココスト低減を図ることができる画像情報の読
取り方法を提供することである。The present invention has been made in view of the above circumstances, and its purpose is to eliminate the need for preparing a large number of color compensation filters with different color tones, and furthermore, ・The circuit configuration and lighting mechanism are simple, and the cost of ml is reduced. An object of the present invention is to provide a method for reading image information that can achieve the following.

く問題点を解決するための手段〉 本発明は上記目的を達するために、冒述の画像情報の読
取り方法において、蓄積型受光素子の蓄積時間内で複数
の光源の点灯時間を各別に制御することに基づき所要の
単色画像を複製するだめの信号を得るようにしたことを
特徴とするものである。Means for Solving the Problems> In order to achieve the above object, the present invention, in the above-mentioned image information reading method, separately controls the lighting time of a plurality of light sources within the storage time of the storage type light receiving element. The invention is characterized in that a signal for duplicating a desired monochromatic image is obtained based on this.

〈実施例〉 以下本発明による実施例を図面に基づいて説明する。<Example> Embodiments according to the present invention will be described below based on the drawings.

第１図は本発明の１実施例を示す概要図で、符号１はカ
ラー原画、２はカラー原画１を照明するそれぞれ赤（Ｒ
）色光源３Ｒ１緑（Ｇ）色光源３Ｇ及び青（Ｂ）色光源
３Ｂ（７）各点灯時間Ｔ、、Ｔ＋３、ｒＢを各別に制御
するための制御回路、４は結像レンズ、５はＣＣＤ（Ｃ
ｈａｒｇｅ　　Ｃｏｕｐｌｅｄ　　Ｄｅｖｉｃｅ）ある
いはＭＯＳ（Ｍｅｔａｌ　０ｘｉｄｅ　Ｓｅｍ１ｃｏｎ
ｄｕｃｔｏｒ）型等のＩＦＩ型受光受光素子５ａいて構
成された１次元アレイセンサ、６は増幅器である。FIG. 1 is a schematic diagram showing one embodiment of the present invention, in which reference numeral 1 is a color original image, and 2 is a red (R) illuminating color original image 1.
) Color light source 3R1 Green (G) color light source 3G and blue (B) color light source 3B (7) Control circuit for controlling each lighting time T, , T+3, rB separately, 4 is an imaging lens, 5 is a CCD (C
Hardge Coupled Device) or MOS (Metal Oxide Sem1con)
6 is an amplifier.

以下上記構成に係る作用及び必要に応じてその原理を説
明する。カラー原画１は結像レンズ４によって１次元７
レイセンサ５上に結像投影され、１次元７レイセンサ５
により主走査方向（１次元７レイセンサ５の配列方向二
面で紙面に垂直方向）に走査され、原画１、レンズ４、
および１次元アレイセンサ５の中のいずれかが矢印へ方
向に移動することによって副走査が行なわれて、原画１
の全面が順次に光電走査される。１次元アレイセンサ５
を構成する各々のＭ積型受光素子５ａによって、主走査
される各瞬間ごとの光像が充電変換され一列分つづの画
像信号を読取るように構成されている。The operation of the above configuration and its principle will be explained below as necessary. The color original image 1 is converted into one-dimensional image 7 by the imaging lens 4.
The image is projected onto the ray sensor 5, and the one-dimensional 7 ray sensor 5
The original image 1, lens 4,
By moving one of the one-dimensional array sensors 5 in the direction of the arrow, sub-scanning is performed, and the original image 1
The entire surface is sequentially photoelectrically scanned. One-dimensional array sensor 5
The optical image at each instant of main scanning is charged and converted by each of the M-product type light receiving elements 5a constituting the image sensor, and image signals corresponding to one row are read out.

前記制御回路２は主走査中の各瞬間に同期すべく、第２
図に示すように受光素子５ａの蓄積時間Ｔｉｎｔ内で青
（Ｂ）、縁（Ｇ）、赤（Ｒ）の３種の光源３Ｒ・３Ｇ・
３Ｂのそ枕ぞれの点灯時間Ｔ、−Ｔ、５・Ｔ５を所要の
単色画像用信号が得られるように各列に制御するように
構成されている。The control circuit 2 has a second
As shown in the figure, three types of light sources 3R, 3G, blue (B), edge (G), and red (R) are used within the accumulation time Tint of the light receiving element 5a.
The lighting time T, -T, 5.times.T5 of each of the 3B columns is controlled for each column so that a required monochromatic image signal is obtained.

この蓄積型受光素子５ａによって検出される受光量の合
計に相当する信号Ｅは次式で示される。A signal E corresponding to the total amount of light received by the storage type light receiving element 5a is expressed by the following equation.

Ｅ＝げＳ（λ）・ＬＲ（λ）ｄλ）・ＴＱ＋＋ｆｓ（λ
）・Ｌａ（λ）ｄλｉＴａ＋１　ｆｓ＜λ）・Ｌ＋ａ（
λ）−λ１・ＴＲ・・・（１）ここで各々の記号は第３
図ないし第５図に示すように、′Ｓ（λ）は当該センサ
の分光感度Ｌａ（λ）は、赤色光源による光像のエネル
ギー分布 り、３（λ）は緑色・光源による光像の分光エネルギー
分布 Ｌｓ（λ）は青色光源による光像の分光エネルギー分布 である。E=geS(λ)・LR(λ)dλ)・TQ++fs(λ
)・La(λ)dλiTa+1 fs<λ)・L+a(
λ) - λ1・TR...(1) Here, each symbol is the third
As shown in Figure 5, 'S (λ) is the spectral sensitivity of the sensor La (λ) is the energy distribution of the light image from the red light source, and 3 (λ) is the spectral sensitivity of the light image from the green light source. The energy distribution Ls(λ) is the spectral energy distribution of the light image produced by the blue light source.

すなわち、この蓄積型受光素子５ａによって検出される
応答信号Ｅは波長λの関数であるから、ＴＱ−Ｔ、−Ｔ
Ｂの値を適宜選択し、又は変更することによって、応答
感度特性Ｅ（λ）を自在に変更することができ、例えば
第５図の実線で示す視感度特性ｅに近似させたり、ある
いは、冒述の暖色系の複製画像用に適した感度特性（赤
色光に対してよりも青色光に対してより高い感度をもた
せる）を得ることもできる。That is, since the response signal E detected by the storage type photodetector 5a is a function of the wavelength λ, TQ-T, -T
By appropriately selecting or changing the value of B, the response sensitivity characteristic E(λ) can be freely changed. For example, the response sensitivity characteristic E(λ) can be approximated to the visibility characteristic e shown by the solid line in FIG. It is also possible to obtain sensitivity characteristics (higher sensitivity to blue light than to red light) that are suitable for the aforementioned warm color reproduction images.

上記のように応答感度特性Ｅ（λ）を視感度特性ｅに近
似させた場合には、肉眼でカラー写真を観察した場合の
濃度の階調と本発明を適用して得られた複製画像の濃度
の階調とが合致するか呟滑らかで自然な階調の単色写真
の複製画像が得られ、異和感を生ずることもない。When the response sensitivity characteristic E(λ) is approximated to the visibility characteristic e as described above, the density gradation when observing a color photograph with the naked eye and the reproduction image obtained by applying the present invention are A reproduction image of a monochromatic photograph with smooth and natural gradation that matches the density gradation is obtained, and does not cause any strange feeling.

また、前記制御回路２により３種の光源３Ｑ・３Ｇ・３
Ｂの各点灯時間と蓄積時間との比（以下デエーティ比と
称する）ＴＲ／Ｔｉｎｔ、　Ｔ、；　／Ｔｉｎｔ、ＴＢ
／Ｔｉｎｔを適宜変更することにより、例えばカラー写
真原画中に表われた色カブリを補正することもできる。In addition, the control circuit 2 controls three types of light sources 3Q, 3G, and 3.
Ratio between each lighting time and accumulation time of B (hereinafter referred to as DA ratio) TR/Tint, T; /Tint, TB
By appropriately changing /Tint, it is also possible to correct color fog appearing in the original color photograph, for example.

ちなみに、カラー原画が全体に赤味を帯びて偏色（赤カ
プリ）している場合には赤色光源３５の点灯時間ＴｆＬ
を減少させ−という如くである。By the way, if the entire color original image is reddish and polarized (red capri), the lighting time TfL of the red light source 35
and so on.

もつとも、各光源３ｑ・３．３　・３日の点一時間ＴＲ
”Ｔａ　”ＴＢを変化させた場合においても、この受光
素子５ａが受ける全露光量の最大値ＥＭＡＸが当該受光
素子５ａの飽和露光量内におさまるようにすることが望
ましい、そうでない場合にはブルーミングにより、解像
力の低下を招ねく。However, each light source 3q, 3.3, 3 days point 1 hour TR
Even when changing "Ta" TB, it is desirable that the maximum value EMAX of the total exposure amount received by this light receiving element 5a falls within the saturation exposure amount of the light receiving element 5a.If not, blooming may occur. This results in a decrease in resolution.

なお、上記のように色カプリを補正するべく各光源３５
・３６・３Ｂの減灯時１１１１ｒａ・Ｔ、コ・ＴＢを変
化させた場合には、これに対応して蓄積時間Ｔ　ｉｎＬ
内における受光量の合計もΔＥだけ変化し、同一サンプ
リングポイントに対する出力レベルが変化する。Note that each light source 35 is used to correct color capri as described above.
・If 1111ra・T and ko・TB are changed during dimming of 36.3B, the accumulation time T inL corresponds to this.
The total amount of light received within the range also changes by ΔE, and the output level for the same sampling point changes.

この出力レベルの変化を補償するには、前記増幅器６の
利得Ｇを一定とし、増幅率Ｋを次式％式％（２） で示すように、制御することにより達成することができ
る。Compensation for this change in output level can be achieved by keeping the gain G of the amplifier 6 constant and controlling the amplification factor K as shown in the following equation (2).

また、前述のように、受光素子５ａが受ける全露光量の
最大値ＥＭＡＸを当該受光素子５＆の飽和露光量内にお
さめ、かつ、飽和露光量近傍に設　′定することが、当
該読取り装置のダイナミックレンジを大軽くすることか
らも望ましい、この点に鑑み、所要の光源の点灯時間を
変更したとき、これに対応させて他の光源の点灯時間を
変化させて、受光素子５ａが受ける全露光量の最大値Ｅ
ＭＡＸを一定にすることが望ましい。Furthermore, as described above, it is important for the reading device to keep the maximum value EMAX of the total exposure amount received by the light receiving element 5a within the saturated exposure amount of the light receiving element 5&, and to set it near the saturated exposure amount. In view of this, when the lighting time of a required light source is changed, the lighting time of other light sources is changed correspondingly to reduce the total exposure received by the light receiving element 5a. Maximum amount E
It is desirable to keep MAX constant.

上記実施例においては、３原色光源を用いて蓄積型受光
素子の蓄積時周内で各別に点灯時間を制御することによ
り、波長に対する受光量＆Ｅ（λ）を適宜変更・選択す
るようにしたが、これに限るものではなく、例えば、緑
色光源と赤色光源との２色の組合せ、あるいは主波長の
異なる池の光源との組み合せ等により、冒述のように特
定の効果をねらった単色写真用画像信号を得ることらで
きなお、上記光源としては、高周波制御による蛍光灯を
用いることや青、緑、赤色ＬＥＤ光源等を用いることが
できる。In the above embodiment, by controlling the lighting time of each of the three primary color light sources within the accumulation time period of the accumulation type light receiving element, the amount of received light &E(λ) with respect to the wavelength is changed and selected as appropriate. , but is not limited to this, for example, monochromatic photography aiming at a specific effect as mentioned above by combining two colors of a green light source and a red light source, or a combination with a pond light source with a different dominant wavelength, etc. It is possible to obtain an image signal.As the light source, a fluorescent lamp under high frequency control or a blue, green, or red LED light source can be used.

また、主走査２本分以上の２次元の７レイセンサを用い
ることもでき、この場合の副走査移動は２次元の７レイ
センサの１回の走査毎に行えばよい。もちろん、２次元
アレイセンサがＴＶカメラ用などの１画面を一度に撮像
するものである場合にもこの発明の方法は適用すること
ができる。Further, a two-dimensional 7-ray sensor with two or more main scans can be used, and in this case, the sub-scanning movement may be performed for each scan of the two-dimensional seven-ray sensor. Of course, the method of the present invention can also be applied when the two-dimensional array sensor is used for a TV camera or the like that images one screen at a time.

〈発明の効果〉 本発明によれば、前記のように構成され作用するから、
次のような優れた効果を奏する。<Effects of the Invention> According to the present invention, since it is configured and operates as described above,
It has the following excellent effects:

仁　数多くの種類の色補償フィルタを用意することなく
、光源の点灯比を設定するだけという簡単な作業で所期
の目的が達せられる。Jin: The desired purpose can be achieved by simply setting the lighting ratio of the light source, without having to prepare numerous types of color compensation filters.

口、　　ＣＯＤのようなアレイセンサを用いることによ
って、レーザ光のような複雑な光学的走査が不要となり
、照明機構が簡単となる。By using an array sensor such as COD, complex optical scanning such as laser light is not required, and the illumination mechanism is simplified.

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

第１図は本発明の１実施例を示す概要図、第２図は蓄積
型受光素子の蓄積時間内での各色光源の点灯時間の制御
の一例を示す説明図、第３図は３原色光源の一例による
分光エネルギー分布図、第４図は受光素子の一例による
分光感度特性図、第５図は第１図による画像情報読取り
方法により得られその一例を示す応答感度図である。 １・・・カラー原画、　　２・・・制御回路、３８・・
・赤色光源、　３６・・・緑色光源、３Ｂ・・・青色光
源、　　４・・・結像レンズ、５・・・１次元アレイセ
ンサ、　　５ａ・・・蓄積型受光素子、　６・・・増幅
器、　Ｔ　ｉｎｔ・・・蓄積時間、ＴＩ２・・・赤色光
源の点灯時間、　ＴＱ・・・緑色光源の点灯時間、　Ｔ
Ｂ・・・青色光源の点灯時間。 第１図 第２図 手続補正書（自発） 昭和６０年　２月ｔ１日 昭和５９年特許願第　２７１２１７　　号２、発明の名
称 画像情報の読取り方法 ３、補正をする者 事件との関係特許出願人 ４、代　理　人 ５、補正命令の日付　　昭和　　年　　月　　日発送６
、補正の対象特許請求の範囲１発明の詳細な説明７、補
正の内容 （１）特許請求の範囲の記載を下記の通り補正する。 記 １、主波長の異なる複数の光源でカラー原画を照明し、
結像光学系でカラー原画の光像を蓄積型受光素子で構成
したアレイセンサ上に結像し、蓄積型受光素子の蓄積時
間内で前記複数の光源の点灯時間を１別に制御するよう
にして前記光像を光電変換して単色画像用信号を得るよ
うにした画像情報の読取り方法２、複数の光源の点灯周
期を、蓄積型受光素子の蓄積周期と同期させるとともに
、蓄積型受光素子が受ける全露光量の最大値が当該素子
の飽和露光量内におさまる範囲で、蓄積時間に対する各
光源の点灯時間の比を自在に変更するようにした特許請
求の範囲第１項に記載した画像情報の読取り方法 ３、各光源の点灯時間の変更に伴なう蓄積時間内におけ
る当該受光素子が受ける全露光量の変動量を、増巾器で
補償するようにした特許請求の範囲第２項に記載した画
像情報の読取り方法 ４、複数の光源のうち、所要の光源の点灯時間の変更に
対応させて他の光源の点灯時間を変化させることにより
、蓄積時間内における当該受光素子が受ける全露光量を
一定にするようにした特許請求の範囲第１項又は第２項
に記載した画像情報の読取り方法 ５、複数の光源を赤、緑、及び青の三種の光源とする特
許請求の範囲第１項ないし第４項のいずれかに記載した
画像情報の読取り方法（°ｉ）明細書第５頁１４行目に
「各別」とあるを「個別」と補正する。Fig. 1 is a schematic diagram showing one embodiment of the present invention, Fig. 2 is an explanatory diagram showing an example of controlling the lighting time of each color light source within the storage time of the storage type light receiving element, and Fig. 3 is a three primary color light source. FIG. 4 is a spectral energy distribution diagram according to an example, FIG. 4 is a spectral sensitivity characteristic diagram according to an example of a light receiving element, and FIG. 5 is a response sensitivity diagram obtained by the image information reading method shown in FIG. 1 and showing an example thereof. 1...Color original picture, 2...Control circuit, 38...
・Red light source, 36...Green light source, 3B...Blue light source, 4...Imaging lens, 5...One-dimensional array sensor, 5a...Storage type light receiving element, 6...Amplifier, T int...accumulation time, TI2...red light source lighting time, TQ...green light source lighting time, T
B...Lighting time of the blue light source. Figure 1 Figure 2 Procedural amendment (voluntary) February t1, 1985 Patent application No. 271217 of 1988 2. Title of invention Method for reading image information 3. Person making the amendment Patent applicant related to the case 4. Agent 5. Date of amendment order Sent on Month, Day, Showa 6.
, Claims subject to amendment 1 Detailed description of the invention 7 Contents of amendment (1) The description of the claims is amended as follows. Note 1. Illuminating the color original with multiple light sources with different dominant wavelengths,
A light image of the color original image is formed by an imaging optical system on an array sensor composed of storage type light receiving elements, and lighting times of the plurality of light sources are individually controlled within the storage time of the storage type light receiving elements. Image information reading method 2 in which a monochromatic image signal is obtained by photoelectrically converting the optical image, the lighting cycle of the plurality of light sources is synchronized with the accumulation cycle of the storage type light receiving element, and the storage type light receiving element receives the signal. Image information according to claim 1, wherein the ratio of the lighting time of each light source to the storage time is freely changed within the range where the maximum value of the total exposure falls within the saturation exposure of the element. Reading method 3, as set forth in claim 2, wherein a variation in the total exposure amount received by the light receiving element within the accumulation time due to a change in the lighting time of each light source is compensated by an amplifier. Method 4 for reading image information: By changing the lighting time of a desired light source among multiple light sources in accordance with the change in lighting time of other light sources, the total amount of exposure received by the relevant light receiving element within the storage time is determined. A method 5 for reading image information according to claim 1 or 2, in which the image information is kept constant, and claim 1, in which the plurality of light sources are three types of light sources: red, green, and blue. Method for reading image information described in any of Items 4 through 4 (°i) In page 5, line 14 of the specification, the words ``separately'' are corrected to ``individual''.

Claims (1)

【特許請求の範囲】 １、主波長の異なる複数の光源でカラー原画を照明し、
結像光学系でカラー原画の光像を蓄積型受光素子で構成
したアレイセンサ上に結像し、蓄積型受光素子の蓄積時
間内で前記複数の光源の点灯時間を各別に制御するよう
にして前記光像を光電変換して単色画像用信号を得るよ
うにした画像情報の読取り方法 ２、複数の光源の点灯周期を、蓄積型受光素子の蓄積周
期と同期させるとともに、蓄積型受光素子が受ける全露
光量の最大値が当該素子の飽和露光量内におさまる範囲
で、蓄積時間に対する各光源の点灯時間の比を自在に変
更するようにした特許請求の範囲第１項に記載した画像
情報の読取り方法 ３、各光源の点灯時間の変更に伴なう蓄積時間内におけ
る当該受光素子が受ける全露光量の変動量を、増巾器で
補償するようにした特許請求の範囲第２項に記載した画
像情報の読取り方法 ４、複数の光源のうち、所要の光源の点灯時間の変更に
対応させて他の光源の点灯時間を変化させることにより
、蓄積時間内における当該受光素子が受ける全露光量を
一定にするようにした特許請求の範囲第１項又は第２項
に記載した画像情報の読取り方法 ５、複数の光源を赤、緑、及び青の三種の光源とする特
許請求の範囲第１項ないし第４項のいずれかに記載した
画像情報の読取り方法[Claims] 1. Illuminating a color original image with a plurality of light sources having different dominant wavelengths,
A light image of the color original image is formed by an imaging optical system on an array sensor composed of storage type light receiving elements, and lighting times of the plurality of light sources are individually controlled within the storage time of the storage type light receiving elements. Image information reading method 2 in which a monochromatic image signal is obtained by photoelectrically converting the optical image, the lighting cycle of the plurality of light sources is synchronized with the accumulation cycle of the storage type light receiving element, and the storage type light receiving element receives the signal. Image information according to claim 1, wherein the ratio of the lighting time of each light source to the storage time is freely changed within the range where the maximum value of the total exposure falls within the saturation exposure of the element. Reading method 3, as set forth in claim 2, wherein a variation in the total exposure amount received by the light receiving element within the accumulation time due to a change in the lighting time of each light source is compensated by an amplifier. Method 4 for reading image information: By changing the lighting time of a desired light source among multiple light sources in accordance with the change in lighting time of other light sources, the total amount of exposure received by the relevant light receiving element within the storage time is determined. A method 5 for reading image information according to claim 1 or 2, in which the image information is kept constant, and claim 1, in which the plurality of light sources are three types of light sources: red, green, and blue. How to read image information described in any of Sections 1 to 4
JP59271217A 1984-12-21 1984-12-21 Reading method of picture information Pending JPS61148959A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP59271217A JPS61148959A (en) 1984-12-21 1984-12-21 Reading method of picture information
GB08520720A GB2169167B (en) 1984-12-21 1985-08-19 Obtaining monochromatic images from colour originals
DE19853531339 DE3531339A1 (en) 1984-12-21 1985-09-03 METHOD AND DEVICE FOR OBTAINING IMAGE INFORMATION

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59271217A JPS61148959A (en) 1984-12-21 1984-12-21 Reading method of picture information

Publications (1)

Publication Number Publication Date
JPS61148959A true JPS61148959A (en) 1986-07-07

Family

ID=17496977

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59271217A Pending JPS61148959A (en) 1984-12-21 1984-12-21 Reading method of picture information

Country Status (3)

Country Link
JP (1) JPS61148959A (en)
DE (1) DE3531339A1 (en)
GB (1) GB2169167B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0265366A (en) * 1988-08-31 1990-03-06 Fuji Electric Co Ltd Color picture reader
US6456748B1 (en) 1996-06-06 2002-09-24 Canon Kabushiki Kaisha Image reading system
US7476847B2 (en) 2004-07-29 2009-01-13 Canon Components, Inc. Adaptive image reading apparatus and control method of the apparatus

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR920005856B1 (en) * 1988-04-25 1992-07-23 소니 가부시기가이샤 Color picture reading device
DE4136646A1 (en) * 1991-11-07 1993-05-13 Hell Ag Linotype METHOD FOR SCRATING COLOR DOCUMENTS AND DEVICE FOR CARRYING OUT THE METHOD
DE4331873A1 (en) * 1993-09-21 1995-03-30 Aeg Multi-image camera

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5666974A (en) * 1979-11-02 1981-06-05 Canon Inc Picture forming method
US4318122A (en) * 1980-10-06 1982-03-02 International Business Machines Corporation Electronic color separation
JPS57121367A (en) * 1981-01-20 1982-07-28 Canon Inc Method for reading color original
JPS57191638A (en) * 1981-05-22 1982-11-25 Fuji Photo Film Co Ltd Scanning and reading method of plane colored picture
JPS5995769A (en) * 1982-11-25 1984-06-01 Hitachi Ltd Ccd sensor driver
GB2138244B (en) * 1983-04-11 1987-03-11 Fuji Xerox Co Ltd Method and apparatus for reading color image

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0265366A (en) * 1988-08-31 1990-03-06 Fuji Electric Co Ltd Color picture reader
US6456748B1 (en) 1996-06-06 2002-09-24 Canon Kabushiki Kaisha Image reading system
US6631219B2 (en) 1996-06-06 2003-10-07 Canon Kabushiki Kaisha Image reading system
US7050657B2 (en) 1996-06-06 2006-05-23 Canon Kabushiki Kaisha Image reading system
US7476847B2 (en) 2004-07-29 2009-01-13 Canon Components, Inc. Adaptive image reading apparatus and control method of the apparatus

Also Published As

Publication number Publication date
GB2169167B (en) 1988-05-18
GB8520720D0 (en) 1985-09-25
DE3531339C2 (en) 1989-07-06
DE3531339A1 (en) 1986-07-10
GB2169167A (en) 1986-07-02

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