JPH0119311B2 - - Google Patents
Info
- Publication number
- JPH0119311B2 JPH0119311B2 JP55098304A JP9830480A JPH0119311B2 JP H0119311 B2 JPH0119311 B2 JP H0119311B2 JP 55098304 A JP55098304 A JP 55098304A JP 9830480 A JP9830480 A JP 9830480A JP H0119311 B2 JPH0119311 B2 JP H0119311B2
- Authority
- JP
- Japan
- Prior art keywords
- sub
- main scanning
- illumination
- original
- reading
- 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
Links
- 238000005286 illumination Methods 0.000 claims description 41
- 238000012937 correction Methods 0.000 claims description 10
- 230000010365 information processing Effects 0.000 claims description 9
- 238000003860 storage Methods 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 description 13
- 238000010586 diagram Methods 0.000 description 9
- 238000003384 imaging method Methods 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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
- H04N1/401—Compensating positionally unequal response of the pick-up or reproducing head
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Image Signal Circuits (AREA)
- Exposure Or Original Feeding In Electrophotography (AREA)
- Image Input (AREA)
Description
【発明の詳細な説明】
本発明は照明された原稿を撮像して得た画像情
報の中から該照明の明るさの変化に伴つた変化分
を除去して成る画像情報処理装置に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an image information processing device that removes changes caused by changes in the brightness of illumination from image information obtained by imaging an illuminated document. .
従来の画像情報処理装置の実施例（斜視図）を
第１図と第２図に示す。第１図は原稿１を照明す
るための光源として点光源である電球２ａを用
い、撮像手段として受光部を副走査方向（図の上
下方向）に複数個配列したセミマルチ受光素子４
ａ（例えばCCD素子）を用いた例を示している。
第１図の構成においては、原稿１を電球２ａによ
つて部分的に照明し、該照明された原稿１上の画
像情報（文字、数字、記号、図形等を表わした光
学的情報）は光学系３を経て受光素子４ａの表面
に結像する。受光素子４ａは該結像した幅ｄと対
応する画像情報を前述した副走査方向に走査して
該光学的情報を電気信号に変換し不図示の信号線
に画像信号を出力する。そして、電球２ａ、光学
系３、受光素子４を連結した連結部材５を矢印６
の方向（主走査方向）に走査する。更に、該主走
査が終了すると原稿１を不図示の原稿搬送手段に
よつて受光素子４ａが撮像した情報の幅d0だけ移
動して副走査させる。これらの主走査と副走査を
繰返す事によつて原稿１に記録している全ての画
像情報を電気信号に変換する事ができる。しか
し、第１図の構成において、電球２ａは発熱量が
多いので他の電子部品を劣化させ、該電球自体の
寿命も短い。また、前述の如く主走査時には電球
２ａも光学系３、受光素子４ａと共に走査させる
必要があるので装置が複雑になり大形化する。こ
のような欠点を除去するために、光源として電球
２ａを用いないで螢光灯を用いた構成が考えられ
ている。第２図は原稿１を照明するための光源と
して線光源である螢光灯２ｂを用い、撮像手段と
して受光部を主走査方向（原稿１に平行で前記副
走査方向と略直角な方向）に複数個配列したフル
マルチ受光素子４ｂを用いた例を示している。第
２図の構成においては、原稿１を螢光灯２ｂによ
つて該主走査方向全体に亘つて照明し、照明され
た原稿１上の該主走査方向の画像情報は光学系３
を経て受光素子４ｂの表面に結像する。受光素子
４ｂは該結像した長さｌと対応する画像情報を前
述した主走査方向に走査して該光学的情報を電気
信号に変換して不図示の信号線に画像信号を出力
する。そして、該主走査方向の画像信号を出力し
終ると原稿１を不図示の原稿搬送手段によつて移
動して副走査させる。これらの主走査と副走査を
繰返す事によつて原稿１に記録している全ての情
報を電気信号に変換する事ができる。しかし、第
２図の構成において螢光灯２ｂは該主走査方向を
均一の明るさで照明してはおらず、実際は螢光灯
２ｂの中央部附近が明るく、該主走査方向の端部
に近くなるに従つて暗くなつている（第７図ｂの
グラフ図を参照のこと）。このような照明のムラ
を防止するために原稿１と光学系３との間に遮光
板７を設けて原稿１の中央部附近から入射する光
の一部分を遮光して受光素子４ｂに到達する画像
情報の明るさのムラを補正している。このような
補正は光学系３の集光力を低下させる。また、こ
のような補正は装置を製造した時点では適正に補
正が行われたとしても（実際には螢光灯の個々の
バラツキを考慮して補正すると複雑な作業にな
る）使用中に螢光灯２ｂが劣化した場合や、これ
を新しい螢光灯に交換した場合は遮光板７の補正
は適正ではなくなる。また、螢光灯２ｂの代りに
多点光源（例えば、豆電球や発光ダイオード等の
点光源を多数個用いて直線状に配列したもの）を
用いる場合は明るさの分布が複雑になるので遮光
板７を用いた補正は実現困難である。 An example (perspective view) of a conventional image information processing device is shown in FIGS. 1 and 2. In FIG. 1, a light bulb 2a, which is a point light source, is used as a light source for illuminating a document 1, and a semi-multiple light receiving element 4 is used as an imaging means, in which a plurality of light receiving sections are arranged in the sub-scanning direction (vertical direction in the figure).
An example using a (for example, a CCD element) is shown.
In the configuration shown in FIG. 1, the original 1 is partially illuminated by a light bulb 2a, and image information (optical information representing characters, numbers, symbols, figures, etc.) on the illuminated original 1 is optically illuminated. The image passes through the system 3 and is focused on the surface of the light receiving element 4a. The light receiving element 4a scans image information corresponding to the imaged width d in the sub-scanning direction mentioned above, converts the optical information into an electrical signal, and outputs the image signal to a signal line (not shown). Then, connect the connecting member 5 connecting the light bulb 2a, the optical system 3, and the light receiving element 4 with the arrow 6
scan in the direction (main scanning direction). Furthermore, when the main scanning is completed, the original 1 is moved by a width d 0 of the information imaged by the light receiving element 4a by an unillustrated original conveying means, and is sub-scanned. By repeating these main scans and sub-scans, all the image information recorded on the document 1 can be converted into electrical signals. However, in the configuration shown in FIG. 1, the light bulb 2a generates a large amount of heat, which deteriorates other electronic components, and the life of the light bulb itself is short. Furthermore, as described above, during main scanning, the light bulb 2a must also be scanned together with the optical system 3 and the light receiving element 4a, which increases the complexity and size of the apparatus. In order to eliminate such drawbacks, a configuration has been considered in which a fluorescent lamp is used as a light source instead of the electric bulb 2a. In FIG. 2, a fluorescent lamp 2b, which is a linear light source, is used as a light source for illuminating the original 1, and a light receiving section is used as an imaging means in the main scanning direction (a direction parallel to the original 1 and approximately perpendicular to the sub-scanning direction). An example using a plurality of arrayed full multi-light receiving elements 4b is shown. In the configuration shown in FIG. 2, the original 1 is illuminated over the entire main scanning direction by a fluorescent lamp 2b, and image information on the illuminated original 1 in the main scanning direction is transmitted to the optical system 3.
The image is then formed on the surface of the light receiving element 4b. The light receiving element 4b scans image information corresponding to the imaged length l in the above-described main scanning direction, converts the optical information into an electrical signal, and outputs the image signal to a signal line (not shown). After outputting the image signal in the main scanning direction, the original 1 is moved by an unillustrated original conveying means to perform sub-scanning. By repeating these main scans and sub-scans, all the information recorded on the document 1 can be converted into electrical signals. However, in the configuration shown in FIG. 2, the fluorescent lamp 2b does not illuminate the main scanning direction with uniform brightness; in fact, the central part of the fluorescent lamp 2b is bright, and the fluorescent lamp 2b is bright near the edge in the main scanning direction. (See the graph in Figure 7b). In order to prevent such unevenness in illumination, a light shielding plate 7 is provided between the original 1 and the optical system 3 to block part of the light that enters from around the center of the original 1, thereby preventing the image from reaching the light receiving element 4b. Corrects uneven brightness of information. Such correction reduces the light gathering power of the optical system 3. In addition, even if such corrections were made properly at the time of manufacturing the device (in reality, it would be a complicated task to take into account the individual variations in fluorescent lamps), it is important to note that the fluorescent If the lamp 2b deteriorates or is replaced with a new fluorescent lamp, the correction of the light shielding plate 7 will no longer be appropriate. In addition, when using a multi-point light source (for example, a linear arrangement using a large number of point light sources such as small light bulbs and light emitting diodes) instead of the fluorescent lamp 2b, the brightness distribution becomes complicated, so it is necessary to block the light. Correction using the plate 7 is difficult to implement.
本発明は以上の点に鑑みてなされたもので、副
走査方向に複数の受光部をもつたセミマルチの読
取センサを用いて、原稿の全てを読取る装置にお
いて、照明系の照明ムラやフリツカ等により原稿
上の空間的なムラの原稿全域における補正をする
ことを目的とし、詳しくは、原稿の近傍に設けた
基準濃度の基準部材と、上記原稿と上記基準部材
とを照明するための照明手段と、副走査方向に複
数の受光部を含み、副走査することによつてその
複数の受光部により、上記照明手段によつて照明
された上記原稿と上記基準部材とを読取るための
セミマルチの読取センサと、主走査方向の読取り
を行なうべく、上記読取センサを主走査方向に沿
つて移動させる主走査移動手段と、上記原稿の全
ての情報を読取るべく、上記主走査方向に対して
直角な副走査方向に上記原稿と上記読取センサと
の相対移動を行なわしめる副走査移動手段と、上
記主走査移動手段による上記読取センサの移動に
よる上記主走査方向の読取りのとき、上記セミマ
ルチの読取センサによりそのセンサ分の副走査を
繰り返し行ない、上記読取センサの一部の受光部
と他の受光部により上記原稿と上記基準部材とを
読取つて各々画像情報、照明情報として出力せし
める出力手段と、上記読取センサの繰り返し副走
査毎に上記出力手段から出力される上記基準部材
に対応の照明情報の出力レベルを記憶し、１つの
副走査毎にその記憶がリセツトされる記憶手段
と、上記記憶手段に記憶された照明情報により、
上記出力手段から引続き出力される上記画像情報
の出力レベルを補正する補正手段とを有し、上記
記憶手段の照明情報の記憶動作と上記補正手段の
画像情報の補正動作とを、上記主走査移動手段に
よる上記読取センサの移動による上記主走査方向
の読取り時の副走査毎に繰り返し行なわしめるこ
とを特徴とする画像情報処理装置を提供するもの
である。 The present invention has been made in view of the above points, and is intended to be used in an apparatus that reads all of a document using a semi-multiple reading sensor having a plurality of light receiving sections in the sub-scanning direction. The purpose is to correct spatial unevenness on the original over the entire area of the original, and more specifically, it includes a reference member with a reference density provided near the original, and an illumination means for illuminating the original and the reference member. , a semi-multi-reading sensor that includes a plurality of light receiving sections in the sub-scanning direction and reads the original document and the reference member illuminated by the illumination means by the plurality of light receiving sections by sub-scanning; a main scanning moving means for moving the reading sensor along the main scanning direction in order to perform reading in the main scanning direction; and a sub-scanning means perpendicular to the main scanning direction in order to read all information on the document. When reading in the main scanning direction by moving the reading sensor by the sub-scanning moving means for moving the original document and the reading sensor relative to each other in the direction, the semi-multiple reading sensor moves the sensor in the main scanning direction. an output means for repeatedly performing sub-scanning for minutes, and reading the original document and the reference member using a part of the light-receiving section and another light-receiving section of the reading sensor and outputting the results as image information and illumination information, respectively; storage means for storing an output level of illumination information corresponding to the reference member output from the output means for each repeated sub-scan, and for resetting the memory for each sub-scan; Depending on the lighting information,
and a correction means for correcting the output level of the image information that is continuously output from the output means, and the storage operation of the illumination information of the storage means and the correction operation of the image information of the correction means are performed by the main scanning movement. The present invention provides an image information processing apparatus characterized in that the image information processing apparatus repeatedly performs each sub-scanning during reading in the main scanning direction by moving the reading sensor by a means.
以下、図を用いて本発明の説明を行なう。 The present invention will be explained below using figures.
第３図は本発明第１実施例の画像情報処理装置
において画像情報を電気信号に変換する構成を示
した斜視図である。第３図の構成において、原稿
８を照明する光源として線光源である螢光灯９を
用い、撮像手段として受光部を図の副走査方向に
複数個（例えば42個）配列したセミマルチ受光素
子１１を用いた例を示している。第３図の構成に
おいては、原稿８及び板部材１４を螢光灯９によ
つて該主走査方向全体に亘つて照明し、該照明さ
れた原稿８及び板部材１４上の該主走査方向の情
報は光学系１０を経て受光素子１１の表面に結像
する。ここで、板部材１４は原稿８の近傍にあつ
て、例えば透明なガラス板の一部に基準となる光
学的濃度（白、黒、色の種類は任意）を定めた幅
Ｄの基準反射部１５を設ける。或いは幅Ｄの基準
反射部１５だけを設けたものであつても良い。そ
して、受光素子１１は結像した幅ｄの光学的な情
報（例えば32個の受光部が原稿８から幅d2の画像
情報を検知し、10個の受光部が基準反射部１５か
ら幅d1の照明情報を検知する）を電気信号に変換
して信号線１１ａに出力信号を送出する。そし
て、光学系１０、受光素子１１を連結した連結部
材１２を矢印１３の方向（主走査方向）に走査す
る。或いは、基準反射部１５の代りに小さな面積
の基準反射部を設け連結部材１２と連結して移動
させる事も出来る。 FIG. 3 is a perspective view showing a configuration for converting image information into electrical signals in the image information processing apparatus according to the first embodiment of the present invention. In the configuration shown in FIG. 3, a fluorescent lamp 9, which is a line light source, is used as a light source for illuminating the original 8, and a semi-multiple light receiving element 11 is used as an imaging means, in which a plurality of light receiving sections (for example, 42 light receiving sections) are arranged in the sub-scanning direction in the figure. An example using . In the configuration shown in FIG. 3, the original 8 and plate member 14 are illuminated by a fluorescent lamp 9 over the entire main scanning direction, and the illuminated original 8 and plate member 14 are illuminated in the main scanning direction. The information passes through the optical system 10 and forms an image on the surface of the light receiving element 11. Here, the plate member 14 is located near the original 8, and is a reference reflective portion having a width D and having a reference optical density (white, black, or any color) set on a part of a transparent glass plate, for example. 15 will be provided. Alternatively, only the reference reflection section 15 having the width D may be provided. The light-receiving element 11 then forms an image of optical information with a width d (for example, 32 light-receiving parts detect image information with a width d 2 from the original 8, and 10 light-receiving parts detect image information with a width d 2 from the reference reflecting part 15). 1 ) is converted into an electrical signal and an output signal is sent to the signal line 11a. Then, the connecting member 12 connecting the optical system 10 and the light receiving element 11 is scanned in the direction of the arrow 13 (main scanning direction). Alternatively, instead of the reference reflection section 15, a reference reflection section with a small area can be provided and moved while being connected to the connection member 12.
第４図は第３図に示した原稿８と基準反射部１
５を拡大して示した平面図である。第４図におい
て該主走査が終了すると、原稿８を読取つた画像
情報の幅d2だけ不図示の原稿搬送手段によつて図
の上方向に移動する。この結果、この手順では図
の下方向に画像情報を幅走査した事になる。これ
らの主走査と副走査を繰返す事によつて原稿８に
記録している全ての情報を電気信号に変換する事
ができる。このようにして受光素子１１から出力
した電気信号は、幅d1から読取つた例えば10ビツ
トの照明信号と幅d2から読取つた例えば32ビツト
の画像信号であり、前記主走査に伴つて該照明信
号と該画像信号が交互に現われる如き一連の時系
列的な信号となる。 Figure 4 shows the original 8 and the reference reflection section 1 shown in Figure 3.
5 is an enlarged plan view of FIG. When the main scanning is completed in FIG. 4, the document 8 is moved upward in the figure by a width d 2 of the image information read by a document conveying means (not shown). As a result, in this procedure, the width of the image information is scanned in the downward direction of the diagram. By repeating these main scans and sub-scans, all the information recorded on the original document 8 can be converted into electrical signals. The electrical signals outputted from the light receiving element 11 in this way are, for example, a 10-bit illumination signal read from the width d1 and a 32-bit image signal read from the width d2 , and the illumination signal is This results in a series of time-series signals in which the signal and the image signal appear alternately.
第５図は本発明第１実施例の画像情報処理装置
において受光素子１１から出力した電気信号を処
理するための電気回路を示した構成図である。 FIG. 5 is a configuration diagram showing an electric circuit for processing the electric signal output from the light receiving element 11 in the image information processing apparatus according to the first embodiment of the present invention.
第５図において、端子１６ａはクロツク信号を
入力し、端子１６ｂは毎回の主走査の初めに該ク
ロツク信号と同期した主セツト信号を入力し、端
子１６ｃは毎回の副走査の初めに該クロツク信号
と同期した副セツト信号を入力する。本実施例に
用いる受光素子１１は副走査方向に複数の受光部
を配列したセミマルチ型であるから、端子１６ｂ
に入力する主セツト信号の周期が端子１６ｃに入
力する副セツト信号の周期より長い（端子１６
ｂ，１６ｃの近傍にそれぞれのセツト信号を示し
た）。そして、端子１６ｂから入力した主セツト
信号はフリツプフロツプ１９をセツトし、端子１
６ａから入力したクロツク信号をカウンタ１７で
計数して該計数値が前記照明信号のビツト数に対
応したクロツク数Ｎ（例えばＮ＝10）を計数する
と比較器１８はフリツプフロツプ１９，２０をリ
セツトする。そして、フリツプフロツプ１９のイ
ネーブル信号はピークホールド回路２１を動作さ
せる。ピークホールド回路２１は主走査の初めに
存在する第１回目の照明信号のレベルに後続する
照明信号のレベルを揃えるようにAGC回路２３
を制御するので、これに対応する割合で画像信号
のレベルも制御される。第６図ａ〜ｅは第５図に
示した回路に流れる信号の波形図であり、フリツ
プフロツプ１９の出力信号は第６図ｂに示し、フ
リツプフロツプ２０の出力信号は第６図ｃに示し
ている。第５図の受光素子１１から出力する信号
は第６図ａに示す如く照明信号SL1，SL2，SL3…
…と画像信号SP1，SP2，SP3……が交互に存在し、
しかも第３図に示した螢光灯９の主走査方向の明
るさの変化（照明ムラ）に応じて該照明信号と該
画像信号の出力レベルが変化している。しかし、
第５図に示したAGC回路２３がピークホールド
回路２１によつて制御されるので、AGC回路２
３の出力信号は第６図ｄに示したような波形にな
り、照明信号のレベルが一定となる。第６図ｃに
示したフリツプフロツプ２０のイネーブル信号は
AGC回路２３とインバータ２２に入力し、イン
バータ２２はアナログスイツチ２４を制御するの
でアナログスイツチ２４の出力信号は第６図ｄに
示したAGC回路２３からの入力信号から第６図
ｃに示した照明信号の成分を除去し第６図ｅに示
した如き画像信号になる。そして、第６図ｅに示
した画像信号は螢光灯９による照明ムラの影響を
除去したものである。また、第５図のピークホー
ルド回路２１の代りに基準電圧発生器を用い、
時々刻々と変化する照明信号が所定のレベルで出
力するようにAGC回路２３を制御する事によつ
て螢光灯のフリツカによる影響も除去する事が出
来る。 In FIG. 5, the terminal 16a inputs the clock signal, the terminal 16b inputs the main set signal synchronized with the clock signal at the beginning of each main scan, and the terminal 16c inputs the clock signal at the beginning of each sub-scan. Input a subset signal synchronized with Since the light receiving element 11 used in this embodiment is a semi-multi type in which a plurality of light receiving parts are arranged in the sub-scanning direction, the terminal 16b
The cycle of the main set signal input to terminal 16c is longer than the cycle of the subset signal input to terminal 16c.
(The respective set signals are shown near 16c and 16b). The main set signal input from terminal 16b sets flip-flop 19, and
The comparator 18 resets the flip-flops 19 and 20 when the counter 17 counts the clock signal inputted from the illumination signal 6a and counts the number of clocks N (for example, N=10) corresponding to the number of bits of the illumination signal. The enable signal of the flip-flop 19 operates the peak hold circuit 21. The peak hold circuit 21 controls the AGC circuit 23 so that the level of the subsequent illumination signal is equal to the level of the first illumination signal present at the beginning of main scanning.
, the level of the image signal is also controlled at a rate corresponding to this. 6a to 6e are waveform diagrams of signals flowing through the circuit shown in FIG. 5, the output signal of flip-flop 19 is shown in FIG. 6b, and the output signal of flip-flop 20 is shown in FIG. 6c. . The signals output from the light receiving element 11 in FIG. 5 are illumination signals S L1 , S L2 , S L3 . . . as shown in FIG. 6 a.
...and image signals S P1 , S P2 , S P3 ... exist alternately,
Moreover, the output levels of the illumination signal and the image signal change in accordance with the change in brightness (illumination unevenness) in the main scanning direction of the fluorescent lamp 9 shown in FIG. but,
Since the AGC circuit 23 shown in FIG. 5 is controlled by the peak hold circuit 21, the AGC circuit 23 shown in FIG.
The output signal of No. 3 has a waveform as shown in FIG. 6d, and the level of the illumination signal becomes constant. The enable signal of the flip-flop 20 shown in FIG. 6c is
The input signal is input to the AGC circuit 23 and the inverter 22, and since the inverter 22 controls the analog switch 24, the output signal of the analog switch 24 is changed from the input signal from the AGC circuit 23 shown in FIG. 6d to the illumination signal shown in FIG. 6c. After removing the signal components, an image signal as shown in FIG. 6e is obtained. The image signal shown in FIG. 6e is obtained by removing the influence of uneven illumination caused by the fluorescent lamp 9. Also, a reference voltage generator is used instead of the peak hold circuit 21 in FIG.
By controlling the AGC circuit 23 so that the illumination signal, which changes from moment to moment, is output at a predetermined level, the influence of flickering of the fluorescent lamp can also be removed.
第７図ａ，ｂは光源の種類と原稿面の照度とを
対比して表わしたものであり、第７図ａは光源と
原稿側面図、第７図ｂは照度のグラフ図である。 7a and 7b show a comparison between the type of light source and the illuminance on the document surface, FIG. 7a is a side view of the light source and the document, and FIG. 7b is a graph of the illuminance.
第３図〜第６図の説明は第７図ａに示した螢光
灯９で原稿８を照明したものであり、第７図ｂで
は曲線２５ａの如き照明特性を持つものであつた
が、螢光灯９の代りに豆電球又は発光ダイオード
等の複数個の光源９ａ〜９ｅを列状に配列した多
点光源を用いると、原稿上の明るさは第６図ｂに
曲線２５ｂで表わしたような照明特性となる。こ
のような照明ムラの補正を行なう構成を以下に述
べる。 In the explanation of FIGS. 3 to 6, the document 8 is illuminated with the fluorescent lamp 9 shown in FIG. 7a, and in FIG. When a multi-point light source in which a plurality of light sources 9a to 9e such as miniature light bulbs or light emitting diodes are arranged in a row is used instead of the fluorescent lamp 9, the brightness on the manuscript is represented by a curve 25b in FIG. 6b. The lighting characteristics will be as follows. A configuration for correcting such illumination unevenness will be described below.
第８図は第３図の螢光灯９を第７図の光源９ａ
〜９ｅに置き換えた本発明第２実施例において、
受光素子１１から出力した電気信号を処理するた
めの電気回路を示した構成図である。 FIG. 8 shows the fluorescent lamp 9 in FIG. 3 as a light source 9a in FIG.
In the second embodiment of the present invention in which 9e is replaced with
3 is a configuration diagram showing an electric circuit for processing an electric signal output from a light receiving element 11. FIG.
第８図において、端子１６ａはクロツク信号を
入力し、端子１６ｃは毎回の副走査の初めに該ク
ロツク信号と同期したセツト信号を入力する。そ
して、端子１６ｃから入力したセツト信号はフリ
ツプフロツプ２０をセツトし、端子１６ａから入
力したクロツク信号をカウンタ１７で計数して該
計数値が前記照明信号のビツト数に対応してクロ
ツク数Ｎを計数すると比較器１８はフリツプフロ
ツプ２０をリセツトする。そして、フリツプフロ
ツプ２０のイネーブル信号はアナログスイツチ２
７の出力を照明信号が出力している期間だけピー
クホールド回路２１側に接続し画像信号が出力し
ている期間は比較器３０側に接続する。 In FIG. 8, a terminal 16a inputs a clock signal, and a terminal 16c inputs a set signal synchronized with the clock signal at the beginning of each sub-scan. Then, the set signal inputted from the terminal 16c sets the flip-flop 20, and the clock signal inputted from the terminal 16a is counted by the counter 17, and when the counted value corresponds to the number of bits of the illumination signal, the number N of clocks is counted. Comparator 18 resets flip-flop 20. The enable signal of the flip-flop 20 is sent to the analog switch 2.
The output of 7 is connected to the peak hold circuit 21 side only during the period when the illumination signal is being outputted, and connected to the comparator 30 side during the period when the image signal is being outputted.
第９図ａ〜ｅは第８図に示した回路に流れる信
号の波形図であり、フリツプフロツプ２０の出力
信号は第９図ｂに示している。第８図の受光素子
１１から出力する信号は第９図ａに示す如く照明
信号IL1，IL2，IL3……と画像信号IP1，IP2，IP3……
が交互に存在し、しかも第７図に示した光源９ａ
〜９ｅの主走査方向の明るさの変化に応じて該照
明信号と該画像信号の出力レベルが変化してい
る。そして受光素子１１から出力する信号は増幅
器２６で増幅されてアナログスイツチ２７に入力
する。アナログスイツチ２７はフリツプフロツプ
２０の制御によつて入力した信号の中から第９図
ｃに示した如き照明信号IL1，IL2，IL3……の成分
をピークホールド回路２１に入力する。ピークホ
ールド回路２１は１種の記憶回路であつて、アナ
ログスイツチ２７からの照明信号が中断する期間
だけ直前の照明信号レベルを保持する。ピークホ
ールド回路２１の出力信号は分圧器２８に入力
し、分圧器２８でレベル調整を行なつた後にリミ
ツタ２９に出力する。リミツタ２９は分圧器２８
から入力した信号のレベル、振幅に上限値及び下
限値を定めて出力するものである。フリツプフロ
ツプ２０の制御によつてアナログスイツチ２７が
第９図ｄに示した如き画像信号IP1，IP2，IP3……
の成分のみを比較器３０に出力すると、比較器３
０はアナログスイツチ２７から入力した画像信号
とリミツタ２９から入力した照明信号（情報処理
した後の照明信号）とを比較して照明ムラの影響
を除去した第９図ｅに示した如き画像信号を出力
する。そして、第８図に示した本発明第２実施例
も第１実施例の場合と同様に螢光灯のフリツカに
よる影響を除去する事が出来る。このように、本
発明の画像情報処理装置は画像情報の中から照明
の明るさの変化に伴つた変化分を除去するので照
明ムラやフリツカ等による照明の不安定要素を簡
単な構成で除去する事ができ、原稿上の空間的な
ムラの原稿全域における補正が可能となり、画像
信号の質を向上させるものである。 9a to 9e are waveform diagrams of signals flowing through the circuit shown in FIG. 8, and the output signal of flip-flop 20 is shown in FIG. 9b. The signals output from the light receiving element 11 in FIG. 8 are illumination signals I L1 , I L2 , I L3 . . . and image signals I P1 , I P2 , I P3 . . . as shown in FIG. 9 a.
exist alternately, and the light source 9a shown in FIG.
The output levels of the illumination signal and the image signal change in accordance with the change in brightness in the main scanning direction from 9e to 9e. The signal output from the light receiving element 11 is amplified by the amplifier 26 and input to the analog switch 27. The analog switch 27 inputs the components of the illumination signals I L1 , I L2 , I L3 . . . as shown in FIG. The peak hold circuit 21 is a type of memory circuit, and holds the previous illumination signal level only during the period when the illumination signal from the analog switch 27 is interrupted. The output signal of the peak hold circuit 21 is input to a voltage divider 28, and after level adjustment is performed by the voltage divider 28, it is output to a limiter 29. The limiter 29 is the voltage divider 28
The upper limit and lower limit are set for the level and amplitude of the signal input from the input signal and output. Under the control of the flip-flop 20, the analog switch 27 outputs image signals I P1 , I P2 , I P3 . . . as shown in FIG. 9d.
When only the component of is output to the comparator 30, the comparator 3
0 compares the image signal inputted from the analog switch 27 with the illumination signal inputted from the limiter 29 (illumination signal after information processing) to remove the influence of illumination unevenness, as shown in FIG. 9e. Output. Similarly to the first embodiment, the second embodiment of the present invention shown in FIG. 8 can also eliminate the influence of flicker from the fluorescent lamp. As described above, the image information processing device of the present invention removes the changes caused by changes in illumination brightness from image information, so unstable elements of illumination caused by uneven illumination, flicker, etc. can be removed with a simple configuration. This makes it possible to correct spatial unevenness on the document over the entire document, thereby improving the quality of the image signal.
第１図は光源に電球を用いた従来の装置の斜視
図、第２図は光源に螢光灯を用いた従来の装置の
斜視図、第３図は本発明第１実施例の装置に係る
情報変換部の斜視図、第４図は第３図の要部を拡
大して示した平面図、第５図は本発明第１実施例
の装置に係る信号処理部の電気回路の構成図、第
６図ａ〜ｅは第５図の電気回路に流れる信号の波
形図、第７図ａは光源を示した側面図、第７図ｂ
は第７図ａの光源に対応した照度のグラフ図、第
８図は本発明第２実施例の装置に係る信号処理部
の電気回路の構成図、第９図ａ〜ｅは第８図の電
気回路に流れる信号の波形図、
尚、図において、８…原稿、９…螢光灯、１０
…光学系、１１…受光素子、１５…基準反射部、
１６ａ，１６ｂ，１６ｃ…端子、１７…カウン
タ、１８，３０…比較器、１９，２０…フリツプ
フロツプ、２１…ピークホールド回路、２２…イ
ンバータ、２３…AGC回路、２４，２７…アナ
ログスイツチ、２６…増幅器、２８…分圧器、２
９…リミツタ。
FIG. 1 is a perspective view of a conventional device using a light bulb as a light source, FIG. 2 is a perspective view of a conventional device using a fluorescent lamp as a light source, and FIG. 3 is a perspective view of a device according to the first embodiment of the present invention. FIG. 4 is an enlarged plan view of the main part of FIG. 3; FIG. 5 is a configuration diagram of the electric circuit of the signal processing section of the device according to the first embodiment of the present invention; Figures 6 a to e are waveform diagrams of signals flowing through the electric circuit in Figure 5, Figure 7 a is a side view showing the light source, and Figure 7 b.
is a graph of the illuminance corresponding to the light source of FIG. 7a, FIG. 8 is a configuration diagram of the electric circuit of the signal processing section of the device according to the second embodiment of the present invention, and FIGS. Waveform diagram of signals flowing through an electric circuit. In the figure, 8...original, 9...fluorescent lamp, 10
...Optical system, 11... Light receiving element, 15... Reference reflection section,
16a, 16b, 16c... terminal, 17... counter, 18, 30... comparator, 19, 20... flip-flop, 21... peak hold circuit, 22... inverter, 23... AGC circuit, 24, 27... analog switch, 26... amplifier , 28...Voltage divider, 2
9...Limitsuta.
Claims (1)
明手段と、 副走査方向に複数の受光部を含み、副走査する
ことによつてその複数の受光部により、上記照明
手段によつて照明された上記原稿と上記基準部材
とを読取るためのセミマルチの読取センサと、 主走査方向の読取りを行なうべく、上記読取セ
ンサを主走査方向に沿つて移動させる主走査移動
手段と、 上記原稿の全ての情報を読取るべく、上記主走
査方向に対して直角な副走査方向に上記原稿と上
記読取センサとの相対移動を行なわしめる副走査
移動手段と、 上記主走査移動手段による上記読取センサの移
動による上記主走査方向の読取りのとき、上記セ
ミマルチの読取センサによりそのセンサ分の副走
査を繰り返し行ない、上記読取センサの一部の受
光部と他の受光部により上記原稿と上記基準部材
とを読取つて各々画像情報、照明情報として出力
せしめる出力手段と、 上記読取センサの繰り返し副走査毎に上記出力
手段から出力される上記基準部材に対応の照明情
報の出力レベルを記憶し、１つの副走査毎にその
記憶がリセツトされる記憶手段と、 上記記憶手段に記憶された照明情報により、上
記出力手段から引続き出力される上記画像情報の
出力レベルを補正する補正手段とを有し、 上記記憶手段の照明情報の記憶動作と上記補正
手段の画像情報の補正動作とを、上記主走査移動
手段による上記読取センサの移動による上記主走
査方向の読取り時の副走査毎に繰り返し行なわし
めることを特徴とする画像情報処理装置。[Scope of Claims] 1. A reference member having a reference density provided near the original; illumination means for illuminating the original and the reference member; and a plurality of light receiving sections in the sub-scanning direction, and performing sub-scanning Preferably, a semi-multi-reading sensor for reading the original and the reference member illuminated by the illumination means by the plurality of light receiving sections; and a semi-multiple reading sensor for reading in the main scanning direction. a main scanning moving means for moving along the main scanning direction; and a relative movement between the original and the reading sensor in a sub-scanning direction perpendicular to the main scanning direction in order to read all information on the original. When reading in the main scanning direction by moving the reading sensor by the sub-scanning moving means and the main scanning moving means, the semi-multiple reading sensor repeatedly performs sub-scanning for the sensor, and a part of the reading sensor output means for reading the original document and the reference member using a light receiving section and another light receiving section and outputting them as image information and illumination information, respectively; and the reference member outputting from the output means every time the reading sensor performs repeated sub-scanning a storage means for storing an output level of illumination information corresponding to the image data and resetting the memory for each sub-scan; and the image information that is continuously outputted from the output means based on the illumination information stored in the storage means. and a correction means for correcting the output level of the illumination information of the storage means, and the storage operation of the illumination information of the storage means and the correction operation of the image information of the correction means are performed by the main scanning movement of the reading sensor by the main scanning movement means. An image information processing device characterized in that the process is repeated for each sub-scan when reading a direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9830480A JPS5724167A (en) | 1980-07-18 | 1980-07-18 | Picture information processor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9830480A JPS5724167A (en) | 1980-07-18 | 1980-07-18 | Picture information processor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5724167A JPS5724167A (en) | 1982-02-08 |
| JPH0119311B2 true JPH0119311B2 (en) | 1989-04-11 |
Family
ID=14216178
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9830480A Granted JPS5724167A (en) | 1980-07-18 | 1980-07-18 | Picture information processor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5724167A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60127874A (en) * | 1983-12-14 | 1985-07-08 | Fuji Xerox Co Ltd | Original reader |
| JPS61125271A (en) * | 1984-11-21 | 1986-06-12 | Canon Inc | Original reading device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5334422A (en) * | 1976-09-11 | 1978-03-31 | Hitachi Ltd | Photo electric converter |
| JPS5453918A (en) * | 1977-10-07 | 1979-04-27 | Ricoh Co Ltd | Stablizing method of video signal |
| JPS54114919A (en) * | 1978-02-28 | 1979-09-07 | Ricoh Co Ltd | Reader for video information |
-
1980
- 1980-07-18 JP JP9830480A patent/JPS5724167A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5334422A (en) * | 1976-09-11 | 1978-03-31 | Hitachi Ltd | Photo electric converter |
| JPS5453918A (en) * | 1977-10-07 | 1979-04-27 | Ricoh Co Ltd | Stablizing method of video signal |
| JPS54114919A (en) * | 1978-02-28 | 1979-09-07 | Ricoh Co Ltd | Reader for video information |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5724167A (en) | 1982-02-08 |
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