JPS603264A - Image reading device - Google Patents
Image reading deviceInfo
- Publication number
- JPS603264A JPS603264A JP11008083A JP11008083A JPS603264A JP S603264 A JPS603264 A JP S603264A JP 11008083 A JP11008083 A JP 11008083A JP 11008083 A JP11008083 A JP 11008083A JP S603264 A JPS603264 A JP S603264A
- Authority
- JP
- Japan
- Prior art keywords
- reading
- speed
- scanning
- read
- carriage
- 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
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
- H04N1/04—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa
- H04N1/17—Scanning arrangements, i.e. arrangements for the displacement of active reading or reproducing elements relative to the original or reproducing medium, or vice versa the scanning speed being dependent on content of picture
Landscapes
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Facsimile Scanning Arrangements (AREA)
Abstract
Description
【発明の詳細な説明】
（技術分野）
本発明は、一定方向に並べた複数個の読取素子または１
の読取素子を有するセンサを用いて、読取対象を走査し
ながら文字、絵、記号等を読取る画像読取装置に関する
。 ゛
（従来技術）
従来、画像読取装置においては、読取部を一定方向に動
かして読取対象を走査する際に、−行あるいは複数行に
わたって空白行が存在する場合にも、通常と同じ様に読
取動作を行っているので、時間の無駄になっていた。Detailed Description of the Invention (Technical Field) The present invention relates to a plurality of reading elements arranged in a certain direction or one
The present invention relates to an image reading device that reads characters, pictures, symbols, etc. while scanning an object to be read using a sensor having a reading element. (Prior Art) Conventionally, in an image reading device, when scanning an object to be read by moving the reading unit in a certain direction, even if there is a blank line or a blank line over multiple lines, the image reading device continues to read the image in the same way as usual. It was a waste of time because I was going through the motions.
（目的）
本発明の目的は、」二連の点に鑑み、空白８１（におけ
る走査を速めて読取時間の短縮を図った画像読取装置を
提供することにある。(Objective) In view of two points, it is an object of the present invention to provide an image reading device that speeds up scanning in the blank space 81() and shortens the reading time.
かかる目的を達成するために、本発明では、読取対象を
鮮明に読取り得る程度の走査速度と、それよりも高速で
あるが背景とｄ２を取対象に書かれているもの（例えば
文字と空白部）を区別し得る程度の走査速度とを有し、
まず高速走査にて読取対象の有無を検出し、読取対象が
存在する場合には低速走査に落として正確に読み取り、
もって短時間にて走査を終了させるようにする。In order to achieve such an object, the present invention has a scanning speed that is high enough to clearly read the object to be read, and a scanning speed that is faster than that to clearly read objects that are written on the background and d2 (for example, characters and blank areas). ), and
First, high-speed scanning is used to detect the presence or absence of a target to be read, and if the target is present, it is switched to low-speed scanning to accurately read the target.
This allows scanning to be completed in a short time.
（実施例） 以下、図面を参照して本発明の詳細な説明する。(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.
第１Ａ図お・より＝”第１巳口は、本発明を適用した画
像読取装置の一実施例を示す構成図である。図示した読
取センサ１は、軸５を中心に回転するよう取イリけであ
る。そして高速走査中は、第１８図文賎゛に示す如く、
光源３と共に走査方向に回転する。FIG. 1A is a block diagram showing an embodiment of an image reading device to which the present invention is applied. During high-speed scanning, as shown in Figure 18,
It rotates together with the light source 3 in the scanning direction.
また、レンズ２を用いて、読取センサｌの焦点を読取対
象４に合わせる。なお、読取対象４が充分な明るさをイ
イするときは、光源３を必要としない。読取対象４の光
度が不足する揚台、走査速度に拘りなく、読取センサ１
と同様に一軸中心に回転して読Ｊｒｙ対象４を充分に明
るく照らす。Further, the lens 2 is used to focus the reading sensor 1 on the object 4 to be read. Note that when the object to be read 4 has sufficient brightness, the light source 3 is not required. When the light intensity of the reading target 4 is insufficient, regardless of the scanning speed, the reading sensor 1
Similarly, it rotates around one axis and illuminates the object 4 to be read sufficiently brightly.
’）′Ｓ ２図は、第１１／１に示した読取部の電気的
ブロック図を示す。ここで、ＣＰＵ１５は読取機構全体
の制御を行うために、制御信号を制御回路６．スレンシ
ョルド制ｆａ１１回路７に送る。')'S Figure 2 shows an electrical block diagram of the reading section shown in No. 11/1. Here, in order to control the entire reading mechanism, the CPU 15 sends a control signal to the control circuit 6. It is sent to Threnskjöld system fa11 circuit 7.
制御回路８は読取センサ駆動回路８と、読取部（？Ｊ１
図参照）を搭載したキャリッジ（図示せず）の駆動回路
８と、読取センサ１および光源３の回転駆動回路ｌＯと
、次の走査のために読取対象４を走査方向と直交する方
向に移動させる駆動回路１１とに信号を送る。The control circuit 8 includes a reading sensor drive circuit 8 and a reading section (?J1
A drive circuit 8 for a carriage (not shown) equipped with a carriage (see figure), a rotation drive circuit IO for the reading sensor 1 and the light source 3, and a rotation drive circuit 10 for moving the object to be read 4 in a direction perpendicular to the scanning direction for the next scan. A signal is sent to the drive circuit 11.
ここで、読取センサ駆動回路８は、読取センサ１を付勢
する。また、キャリ・ンジ駆動回路９は、キャリッジの
走査方向への移動を制御する。回転駆動回路１０は、高
速サーチ時および通常速度読取時において、読取センサ
ｌおよび光源３の回転角制御を行う。Here, the reading sensor drive circuit 8 energizes the reading sensor 1. Further, the carriage drive circuit 9 controls movement of the carriage in the scanning direction. The rotation drive circuit 10 controls the rotation angle of the reading sensor 1 and the light source 3 during high-speed search and normal speed reading.
スレッシミルドｆｌｉ制御回路７は、高速サーチＭおよ
び通常速度読取時におけるスレッショルドレベルを設定
１−１その信号を比較回路１３に送る。一方、読取セン
サ１の出力は増幅回路１２を介して比較回路１３に送ら
れ、スレッショルド制ｉ１１回路７の出力と比較される
。比較回路１３の出力は、信号処理回路１４に送られる
。The threshold fli control circuit 7 sets the threshold level 1-1 during high-speed search M and normal speed reading and sends the signal to the comparison circuit 13. On the other hand, the output of the reading sensor 1 is sent to the comparison circuit 13 via the amplifier circuit 12 and compared with the output of the threshold control i11 circuit 7. The output of the comparison circuit 13 is sent to the signal processing circuit 14.
走査開始時においては、高速サーチ動作を行うために、
読取センサト光源３を回転動作させるべく ＣＰＵ１５
が制御回路８に信号を送る。そして、信号処理回路１４
から読取対象の存在を示す信号が送出された場合には、
読取センサ１ ・光源３の回転角を通常読取速度の回転
角に戻すと共に、キャリッジの移動速度を通常にして読
取を開始する。At the start of scanning, in order to perform a high-speed search operation,
In order to rotate the reading sensor light source 3, the CPU 15
sends a signal to the control circuit 8. And the signal processing circuit 14
When a signal indicating the existence of a reading target is sent from
Reading sensor 1 - Return the rotation angle of the light source 3 to the rotation angle of the normal reading speed, and set the carriage moving speed to the normal speed and start reading.
もし、読取対象の存在を示す信号が信号処理回路１４に
送出されない場合には、そのままキャリッジの速度を高
速にして高速サーチを続ける。高速サーチ中に読取対象
の存在を示す信号が送出されたときには、上述の如く読
取センサｌ ・光源３の回転角を通常読取の状態に戻し
、かつキャリッジの速度も通常速度に戻して読取を行う
。If a signal indicating the existence of a reading target is not sent to the signal processing circuit 14, the carriage speed is increased to continue the high-speed search. When a signal indicating the existence of a reading target is sent out during the high-speed search, as described above, the rotation angle of the reading sensor l and light source 3 is returned to the normal reading state, and the speed of the carriage is also returned to the normal speed, and reading is performed. .
また、通常速度に戻して読取を行っている場合に、読取
対象が存在しない状態が所定時間だけ継続したときには
、再び高速サーチの状態に復帰される。なお、既述の「
通常」という語は、「正確に読取対象を読み取ることの
できる速度で読取センサ１を移動して、読取センサｌが
第１Ａ図天姑に示す如く読取対象４と平行になっている
状態」を示す。Furthermore, when reading is performed after returning to the normal speed, if the state in which there is no object to be read continues for a predetermined period of time, the state is returned to the high-speed search state. In addition, the above-mentioned “
The term "normal" refers to a state in which the reading sensor 1 is moved at a speed that allows it to accurately read the object, and the reading sensor 1 is parallel to the object 4 as shown in Figure 1A. show.
以上のようにして読取対象４の一走査が終了すると、従
来通り読取対象およ゛びキャリッジを移動１７て再び次
の走査を行う。When one scan of the object to be read 4 is completed as described above, the object to be read and the carriage are moved 17 as in the conventional manner and the next scan is performed again.
上述した実施例では、読取対象を移動させるよう構成し
たが読取対象を固定してキャリッジを２次元的に移動し
得るよう構成することも本発明の要旨を逸脱するもので
はない。また、スレッショルドレベルを変化させて複数
の段階で画像９文字を読取る装置、あるいは特定の色の
みを読取らないように構成した装置、特定の色のみｔ読
み取るように構成した装置についても１本発明の要旨を
逸脱するものではない。In the embodiments described above, the object to be read is configured to be moved, but it does not depart from the gist of the present invention to configure the object to be read to be fixed and the carriage to be moved two-dimensionally. The present invention also relates to a device that reads nine characters in an image in multiple stages by changing the threshold level, a device configured not to read only a specific color, and a device configured to read only a specific color. This does not deviate from the gist of the matter.
（効果）
以上説明したとおり、本発明によれば、読取対象に読取
るべきものが存在しないときには、高速にて読取センサ
を走査することができるので、従来に比べて短時間で読
取を完了することができる。(Effects) As explained above, according to the present invention, when there is nothing to be read in the reading target, the reading sensor can be scanned at high speed, so reading can be completed in a shorter time than in the past. Can be done.
第１Ａ図かよか’ｔＩＢ記は本発明の一実施例を示す構
成図、第２図は第１図に示した読取部の電気的ブロック
図である。
１・・・読取センサ、
２・・・レンズ、
３・・・光源、
４・・・読取対象、
５・・・回転中心軸、
６・・・制御！１回路、
７・・・スレッショルド制御回路、
８・・・読取センサ駆動回路、
９・・・キャリッジ駆動回路、。
１０・・・読取センサ、光源の回転駆動回路、１１・・
・読取対象移動駆動回路、
１２・・・増幅回路、
１３・・・比較回路、
１４・・・信号処理回路、
１５・・・ＣＰＵ、
１６・・・記憶装置。
特許出願人 キャノン株式会社1A and 1B are block diagrams showing one embodiment of the present invention, and FIG. 2 is an electrical block diagram of the reading section shown in FIG. 1. 1...Reading sensor, 2...Lens, 3...Light source, 4...Reading target, 5...Rotation center axis, 6...Control! 1 circuit, 7... Threshold control circuit, 8... Reading sensor drive circuit, 9... Carriage drive circuit. 10...Reading sensor, light source rotation drive circuit, 11...
- Reading target movement drive circuit, 12... Amplification circuit, 13... Comparison circuit, 14... Signal processing circuit, 15... CPU, 16... Storage device. Patent applicant Canon Co., Ltd.
Claims (1)
しない場合には前記手段の走査速度を増すようにしたこ
とを特徴とする画像読取装置。An image reading device comprising means for detecting a reading object, and increasing the scanning speed of the means when a predetermined reading object does not exist.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11008083A JPS603264A (en) | 1983-06-21 | 1983-06-21 | Image reading device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11008083A JPS603264A (en) | 1983-06-21 | 1983-06-21 | Image reading device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS603264A true JPS603264A (en) | 1985-01-09 |
Family
ID=14526523
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11008083A Pending JPS603264A (en) | 1983-06-21 | 1983-06-21 | Image reading device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS603264A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6295093A (en) * | 1985-10-22 | 1987-05-01 | Rohm Co Ltd | Chroma signal processing circuit for vtr |
| US4839740A (en) * | 1985-04-04 | 1989-06-13 | Canon Kabushiki Kaisha | Image processing apparatus for determining the presence or absence of an image on each side of a plurality of originals prior to producing two-sided copies of the originals to avoid producing any copies with blank sides |
-
1983
- 1983-06-21 JP JP11008083A patent/JPS603264A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4839740A (en) * | 1985-04-04 | 1989-06-13 | Canon Kabushiki Kaisha | Image processing apparatus for determining the presence or absence of an image on each side of a plurality of originals prior to producing two-sided copies of the originals to avoid producing any copies with blank sides |
| JPS6295093A (en) * | 1985-10-22 | 1987-05-01 | Rohm Co Ltd | Chroma signal processing circuit for vtr |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6270013B1 (en) | Hand-holdable optical scanner particularly useful as electronic translator | |
| US4500776A (en) | Method and apparatus for remotely reading and decoding bar codes | |
| JPS6170407A (en) | distance measuring device | |
| US4316199A (en) | Graphic forms overlay apparatus | |
| JPS603264A (en) | Image reading device | |
| JPH01299443A (en) | Optical axis shifting type inspecting apparatus for bottle | |
| US3835998A (en) | Edge locating apparatus | |
| JPS61277248A (en) | Image quality determination method and device for image reading device | |
| JPS6161695B2 (en) | ||
| JPS6152518B2 (en) | ||
| JPS61164369A (en) | Manual image scanner | |
| JPS63193663A (en) | Image processor | |
| JPH01250820A (en) | encoder | |
| JP2604358B2 (en) | Barcode demodulator | |
| JPS5942355B2 (en) | optical reader | |
| JPS61166265A (en) | Optical reader | |
| JPS6067833A (en) | Optical fiber inspector | |
| JPH0660378A (en) | Optical data file reader | |
| JP2762781B2 (en) | Solid-state imaging device inspection device | |
| JP3102252B2 (en) | Image reading device | |
| JPS58196757A (en) | Original reading device | |
| JPH04240960A (en) | optical writing device | |
| JPH0230625B2 (en) | ||
| JPS63285063A (en) | Photometric method | |
| JPS6023538B2 (en) | Operating status detection device |