JP2504037B2 - Facsimile machine - Google Patents
Facsimile machineInfo
- Publication number
- JP2504037B2 JP2504037B2 JP62064633A JP6463387A JP2504037B2 JP 2504037 B2 JP2504037 B2 JP 2504037B2 JP 62064633 A JP62064633 A JP 62064633A JP 6463387 A JP6463387 A JP 6463387A JP 2504037 B2 JP2504037 B2 JP 2504037B2
- Authority
- JP
- Japan
- Prior art keywords
- image
- binarized
- signals
- signal
- image 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
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
- H04N1/409—Edge or detail enhancement; Noise or error suppression
- H04N1/4095—Correction of errors due to scanning a two-sided document, i.e. show-through correction
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimiles In General (AREA)
- Storing Facsimile Image Data (AREA)
- Facsimile Image Signal Circuits (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、ファクシミリ装置に関し、特に原稿の両面
に書かれた画像情報を同時に読み取るファクシミリ装置
に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facsimile machine, and more particularly to a facsimile machine that simultaneously reads image information written on both sides of a document.
従来のファクシミリ装置は、両面に書画情報を有する
原稿を送信するとき、まず、装置にセットした原稿の一
面に光を照射し、この反射光を光電変換した画像信号を
符号化および変調して回線を介して、相手方装置に送信
する。次に、装置に再セットした先の原稿の他面を上記
と同様に送信して原稿の送信を終了する。When transmitting a document having writing information on both sides, a conventional facsimile machine first irradiates one side of the document set on the machine with light, and encodes and modulates an image signal obtained by photoelectrically converting the reflected light into a line. To the other party's device. Next, the other side of the original document that has been reset in the apparatus is transmitted in the same manner as above, and the transmission of the original document is completed.
〔発明が解決しようとする問題点〕 上述した従来のファクシミリ装置は、原稿片面分の読
取部しかないため、両面原稿を送信するときは、まず、
原稿の表面を送信してから、再度、原稿の裏面を送信す
るという煩わしい２回の送信操作を必要とする。また、
両面に印刷された原稿を読取ると、原稿の裏面の画像信
号が混入するという問題がある。[Problems to be Solved by the Invention] Since the conventional facsimile apparatus described above has only a reading unit for one side of an original, when transmitting a double-sided original, first,
This requires two troublesome transmission operations of transmitting the front side of the document and then transmitting the back side of the document again. Also,
When a document printed on both sides is read, there is a problem that image signals on the back side of the document are mixed.
本発明の目的は原稿の両面を同時に読取る際に読取面
の裏面からの不要な画像情報の影響を除去し、また、１
回の送信操作で原稿の両面を送信することができるファ
クシミリ装置を提供することにある。An object of the present invention is to eliminate the influence of unnecessary image information from the back side of the reading surface when reading both sides of a document at the same time.
It is an object of the present invention to provide a facsimile device capable of transmitting both sides of a document by one transmission operation.
本発明のファクシミリ装置は、原稿の両面を同時に読
取り第１および第２の画信号を出力する第１および第２
の光電変換部と、前記第１および第２の画信号をそれぞ
れ波形整形して第１および第２の２値化画信号を出力す
る第１および第２の波形整形回路と、 前記第１と第２の画信号とを比較した差分信号を出力
する比較器と、前記差分信号をそれぞれ異なるしきい値
で２値化した第１および第２の２値化信号を出力する第
１および第２の２値化回路と、前記第１および第２の２
値化画信号と前記第１および第２の値化信号との論理和
を求めてそれぞれ第１および第２の画像信号を出力する
第１および第２のOR回路と、前記第２の画像信号を１ペ
ージごとに順次記憶する記憶部と、前記第１の画像信号
を送信したのち、前記記憶部に記憶している第２の画像
信号を読出して送信する切換器とを有して構成される。The facsimile apparatus of the present invention is capable of simultaneously reading both sides of a document and outputting first and second image signals.
Photoelectric conversion units, first and second waveform shaping circuits for shaping the waveforms of the first and second image signals and outputting first and second binarized image signals, respectively. A comparator that outputs a difference signal that compares the second image signal, and first and second output that outputs first and second binarized signals obtained by binarizing the difference signal with different threshold values. Binarizing circuit, and the first and second two
First and second OR circuits for obtaining a logical sum of the binarized image signal and the first and second binarized signals and outputting the first and second image signals, respectively, and the second image signal And a switching unit for transmitting the first image signal and then reading and transmitting the second image signal stored in the storage unit. It
次に、本発明の実施例について図面を参照して説明す
る。Next, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例のブロック図、第２図は本
実施例の動作を説明するための信号波形図である。FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a signal waveform diagram for explaining the operation of this embodiment.
第１図および第２図を参照して説明する。 This will be described with reference to FIGS. 1 and 2.
原稿１は両面に画像情報を有する。第１の光源２は原
稿１の表面を照射し、第２の光原３は原稿１の裏面を照
射する。第１の光電変換部４および第２の光電変換部５
は原稿１の表面および裏面からの反射光を光電変換し、
アナログの第１および第２の画信号21a,21bをそれぞれ
出力する。第１および第２の波形整形回路6,7はそれぞ
れに雑音を除去するためのしきい値電圧Va1,Vb1を有
し、入力の第１および第２の画信号21a,21bの波形を整
形して２値化した第１および第２の２値化画信号22a,22
bをそれぞれ出力する。比較器８は第１と第２の画信号2
1a,21bを比較した差分信号23を出力する。The original 1 has image information on both sides. The first light source 2 illuminates the front surface of the original 1, and the second light source 3 illuminates the back surface of the original 1. First photoelectric conversion unit 4 and second photoelectric conversion unit 5
Photoelectrically converts the light reflected from the front and back of the original 1,
The analog first and second image signals 21a and 21b are output, respectively. The first and second waveform shaping circuits 6 and 7 respectively have threshold voltages Va 1 and Vb 1 for removing noise, and change the waveforms of the input first and second image signals 21a and 21b. Shaped and binarized first and second binarized image signals 22a, 22
Output b respectively. The comparator 8 outputs the first and second image signals 2
A difference signal 23 obtained by comparing 1a and 21b is output.
第１および第２の２値化回路9,10は、それぞれ正負の
異なるしきい値Va2,Va3を有し、それぞれ入力された差
分信号23をしきい値を用いて２値化し、第１および第２
の値化信号24a,24bを出力する。第１および第２のOR回
路11,12は第１および第２の２値化画信号22a,22bと第１
および第２の値化信号24a,24bとの論理和を求め、それ
ぞれ表面の第１の画像信号25aと裏面の第２の画像信号2
5bとを出力する。記憶部13は第２の画像信号25bを１ペ
ージごとに順次記憶する。切換器14は、まず、表面の第
１の画像信号25aを符号器15で符号化し、変調器16で変
調して、網制御部17を介して回線18に送出する。次に、
記憶部13から裏面の第２の画像信号25bを読出して、上
記と同様に回線18に送出して原稿１の両面の送信を終了
する。The first and second binarization circuits 9 and 10 respectively have positive and negative thresholds Va 2 and Va 3 different from each other, and binarize the input difference signal 23 by using the thresholds. 1 and 2
And outputs the binarized signals 24a and 24b. The first and second OR circuits 11 and 12 are connected to the first and second binarized image signals 22a and 22b, respectively.
And the second digitized signals 24a and 24b are ORed to obtain the first image signal 25a on the front surface and the second image signal 2 on the rear surface, respectively.
It outputs 5b and. The storage unit 13 sequentially stores the second image signal 25b page by page. The switching device 14 first encodes the first image signal 25a on the surface by the encoder 15, modulates it by the modulator 16, and sends it to the line 18 via the network control unit 17. next,
The second image signal 25b on the back side is read from the storage section 13 and sent to the line 18 in the same manner as above, and the transmission of both sides of the original 1 is completed.
このようにすると、読み取った画像信号中の裏側から
の不要な信号が、低レベルのときは波形整形回路で除去
し、高レベルのときはOR回路において２値化信号を用い
て除去することができる。In this way, the unnecessary signal from the back side of the read image signal can be removed by the waveform shaping circuit when it is low level, and can be removed by using the binary signal in the OR circuit when it is high level. it can.
以上説明したように本発明は、原稿の表裏両面を同時
に読取った各々の光電変換出力を比較した各差分信号に
より、各々が読取った画像情報中の裏側に書かれた不要
情報の信号を除去するようにしたので画像品質を向上さ
せる効果を有し、また、表面の画像情報を送信しながら
裏面の画像情報を記憶部に記憶しておくことで、原稿の
表裏を連続して送信できる効果も有する。As described above, according to the present invention, the unnecessary information signal written on the back side of the image information read by each is removed by each difference signal obtained by comparing the photoelectric conversion outputs obtained by simultaneously reading both the front and back sides of the document. As a result, it has the effect of improving the image quality, and by storing the image information of the back side in the storage unit while transmitting the image information of the front side, the effect that the front and back sides of the document can be transmitted continuously is also obtained. Have.
第１図は本発明の一実施例のブロック図、第２図は本実
施例の動作を説明するための信号波形図である。 １……原稿、2,3……第1,第２の光源、4,5……第1,第２
の光電変換部、6,7……第1,第２の波形整形回路、８…
…比較器、9,10……第1,第２の２値化回路、11,12……
第1,第２のOR回路、13……記憶部、14……切換器、15…
…符号器、16……変調器、17……網制御部、18……回
線、21a,21b……第1,第２の画信号、22a,22b……第1,第
２の２値化画信号、23……差分信号、24a,24b……第1,
第２の２値化信号、25a……表面の第１の画像信号、25b
……裏面の第２の画像信号。FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a signal waveform diagram for explaining the operation of this embodiment. 1 ... manuscript, 2, 3 ... first and second light sources, 4,5 ... first and second
Photoelectric conversion units, 6, 7 ... First and second waveform shaping circuits, 8 ...
… Comparators, 9,10 …… First and second binarization circuits, 11,12 ……
First and second OR circuits, 13 ... storage unit, 14 ... switching device, 15 ...
... Encoder, 16 ... Modulator, 17 ... Network control unit, 18 ... Line, 21a, 21b ... First and second image signals, 22a, 22b ... First and second binarization Image signal, 23 ... Difference signal, 24a, 24b ... First,
Second binary signal, 25a ... First image signal on the surface, 25b
The second image signal on the back side.
Claims (1)
の画信号を出力する第１および第２の光電変換部と、前
記第１および第２の画信号をそれぞれ波形整形して第１
および第２の２値化画信号を出力する第１および第２の
波形整形回路と、 前記第１と第２の画信号とを比較した差分信号を出力す
る比較器と、前記差分信号をそれぞれ異なるしきい値で
２値化した第１および第２の２値化信号を出力する第１
および第２の２値化回路と、前記第１および第２の２値
化画信号と前記第１および第２の２値化信号との論理和
を求めてそれぞれ第１および第２の画像信号を出力する
第１および第２のOR回路と、 前記第２の画像信号を１ページごとに順次記憶する記憶
部と、前記第１の画像信号を送信したのち、前記記憶部
に記憶している第２の画像信号を読出して送信する切換
器とを有することを特徴とするファクシミリ装置。1. A first and a second reading of both sides of an original at the same time.
First and second photoelectric conversion units for outputting image signals of the first and second image signals, and waveform shaping of the first and second image signals respectively.
And first and second waveform shaping circuits that output a second binarized image signal, a comparator that outputs a difference signal obtained by comparing the first and second image signals, and the difference signal. First output of first and second binarized signals binarized with different thresholds
And a second binarization circuit, and obtains a logical sum of the first and second binarized image signals and the first and second binarized signals to respectively generate the first and second image signals. And a first OR circuit for outputting the second image signal, a storage unit that sequentially stores the second image signal page by page, and a first image signal that is stored in the storage unit after being transmitted. And a switching device for reading and transmitting a second image signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62064633A JP2504037B2 (en) | 1987-03-18 | 1987-03-18 | Facsimile machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62064633A JP2504037B2 (en) | 1987-03-18 | 1987-03-18 | Facsimile machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63229961A JPS63229961A (en) | 1988-09-26 |
| JP2504037B2 true JP2504037B2 (en) | 1996-06-05 |
Family
ID=13263867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62064633A Expired - Lifetime JP2504037B2 (en) | 1987-03-18 | 1987-03-18 | Facsimile machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2504037B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5392135A (en) * | 1990-10-05 | 1995-02-21 | Canon Kabushiki Kaisha | Image reading apparatus having different reading speeds |
| GB2265785B (en) * | 1990-10-05 | 1995-02-01 | Canon Kk | Image reading apparatus |
| JP2878432B2 (en) * | 1990-10-18 | 1999-04-05 | 株式会社日立製作所 | Image information capturing method and image scanner |
| US5646744A (en) * | 1996-01-11 | 1997-07-08 | Xerox Corporation | Show-through correction for two-sided documents |
| US6288798B1 (en) * | 1998-11-30 | 2001-09-11 | Xerox Corporation | Show-through compensation apparatus and method |
-
1987
- 1987-03-18 JP JP62064633A patent/JP2504037B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63229961A (en) | 1988-09-26 |
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