JPH02242390A - Optical device for ocr - Google Patents
Optical device for ocrInfo
- Publication number
- JPH02242390A JPH02242390A JP1062910A JP6291089A JPH02242390A JP H02242390 A JPH02242390 A JP H02242390A JP 1062910 A JP1062910 A JP 1062910A JP 6291089 A JP6291089 A JP 6291089A JP H02242390 A JPH02242390 A JP H02242390A
- Authority
- JP
- Japan
- Prior art keywords
- medium
- light
- light source
- image
- image 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims description 9
- 238000003708 edge detection Methods 0.000 claims abstract description 5
- 230000001678 irradiating effect Effects 0.000 abstract description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明はＯＣＲに関し、特に用紙等の媒体のエツジを光
の反射により検出すると共に、媒体のイメージを読取る
光学装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to OCR, and more particularly to an optical device that detects edges of a medium such as paper by reflecting light and reads an image of the medium.
［従来の技術］
従来、この種のＯＣＲの光学装置は用紙等の媒体の裏側
に、ステンレス又はブラックコーティングした裏当を配
して光学的に媒体のサイドのエツジ検出及び媒体のイメ
ージ読取りを行なっていた。[Prior Art] Conventionally, this type of OCR optical device optically detects edges on the side of the medium and reads images of the medium by placing a stainless steel or black coated backing on the back side of a medium such as paper. was.
［発明が解決しようとする課題］
上述した従来のＯＣＲの光学装置は、媒体の裏側にステ
ンレス又はブラックコーティングした裏当を配している
ので、媒体の厚さがある程度薄い場合、媒体のエツジは
検出できても裏当の色が透けてしまうため、イメージを
正確に読取ることができなくなる欠点がある。[Problems to be Solved by the Invention] The conventional OCR optical device described above has a stainless steel or black-coated backing on the back side of the medium, so if the medium is thin to a certain extent, the edges of the medium are Even if it can be detected, the color of the backing will show through, making it impossible to read the image accurately.
［課題を解決するための手段］
本発明のＯＣＲの光学装置は、上述した従来の課題を解
決するためになされたものであり、用紙等の媒体のエツ
ジ検出及びイメージ読取りを光学的に行なうＯＣＲにお
いて、上記媒体の裏面に配置された板状の表面鏡と、上
記表面鏡上の媒体のイメージ読取り位置に対して斜め方
向に配され、上記イメージ読取り位置に光を照射する光
源とを設けた構成としている。[Means for Solving the Problems] The OCR optical device of the present invention has been made to solve the above-mentioned conventional problems, and is an OCR optical device that optically performs edge detection and image reading of media such as paper. , a plate-shaped front mirror placed on the back surface of the medium, and a light source arranged diagonally with respect to the image reading position of the medium on the front mirror and irradiating light to the image reading position are provided. It is structured as follows.
［実施例コ
次に、本発明の一実施例について図面を参照して説明す
る。[Embodiment] Next, an embodiment 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斜視図、第２図は裏当に用
いる表面鏡の断面図、第３図は媒体検出前の状態を示す
側面図、第４図は媒体検出時の状態を示す側面図、第５
図は読取った媒体のイメージの一例を示す平面図である
。Figure 1 is a perspective view of an embodiment of the present invention, Figure 2 is a sectional view of a front mirror used as a backing, Figure 3 is a side view showing the state before medium detection, and Figure 4 is during medium detection. Side view showing the condition, No. 5
The figure is a plan view showing an example of an image of a read medium.
本実施例のＯＣＲの光学装置は、用紙等の媒体１１のエ
ツジ検出及びイメージ読取りを光学的に行なうものであ
る。このＯＣＲの光学装置は、基本的に、表面鏡１と、
光源２，３と、ロッドレンズ４と、エレメントホルダ５
と、ＣＣＤ−次元イメージセンサ６とからなる。The OCR optical device of this embodiment optically performs edge detection and image reading of a medium 11 such as paper. This OCR optical device basically includes a front mirror 1,
Light sources 2 and 3, rod lens 4, and element holder 5
and a CCD-dimensional image sensor 6.
上記表面ｌ！１は、長板状の反射鏡からなり、媒体１１
の裏面に配置され裏当てとして使用される。表面鏡１は
、第２図に示すように、ガラス板９上に、ＡｆＬ蒸着膜
８を被覆し、ＡＬＬ蒸着膜８上にＳ、０層蒸着膜７を被
覆した３層により構成されている。この表面鏡１は、そ
の表面に媒体１１を置いた場合には、媒体１１の裏側の
イメージをそのまま反射する。Above surface l! 1 consists of a long plate-shaped reflecting mirror, and the medium 11
It is placed on the back side of the paper and used as a backing. As shown in FIG. 2, the front mirror 1 is composed of three layers: a glass plate 9 is coated with an AfL vapor deposited film 8, and an ALL vapor deposited film 8 is covered with an S, 0 layer vapor deposited film 7. . When the medium 11 is placed on the surface of the front mirror 1, the image of the back side of the medium 11 is directly reflected.
上記光源２．３は、上記表面！ｉｌ上の媒体１１のイメ
ージ読取り位置１２に対して斜め上方に配されている。The light source 2.3 is the surface! It is arranged diagonally above the image reading position 12 of the medium 11 on the il.
なお、各光源２．３は、表面鏡１のイメージ読取り位置
１２の法線に対して、対照的に配置されている。このた
め、光源２からの光は、表面鏡１のイメージ読取り位置
１２に照射すると、光源３の方向に反射し、光源３から
の光は表面鏡ｌを介して光源２の方向に反射する。なお
、表面′ＩＸ１上のイメージ読取り位置１２に媒体１１
がある場合には、光源２，３からの光は媒体上に照射す
るため、乱反射し、表面鏡１に対して垂直方向にも光が
反射する。Note that each light source 2.3 is arranged symmetrically with respect to the normal to the image reading position 12 of the front mirror 1. Therefore, when the light from the light source 2 is irradiated onto the image reading position 12 of the front mirror 1, it is reflected in the direction of the light source 3, and the light from the light source 3 is reflected in the direction of the light source 2 via the front mirror 1. Note that the medium 11 is located at the image reading position 12 on the surface 'IX1.
In this case, since the light from the light sources 2 and 3 is irradiated onto the medium, it is diffusely reflected, and the light is also reflected in a direction perpendicular to the front mirror 1.
上記ロッドレンズ４は、表面鏡１のイメージ読取り位置
１２に対して垂直上方に配されており、表面鏡１からの
反射光を入射するようになっている。The rod lens 4 is disposed perpendicularly above the image reading position 12 of the front mirror 1, and is configured to receive reflected light from the front mirror 1.
上記Ｃ０Ｄ−次元イメージセンサ６は、ロッドレンズ４
の上端側に配され、ロッドレンズ４を介して媒体１１の
エツジ検出及びイメージの読取りを行なう。The C0D-dimensional image sensor 6 includes a rod lens 4
It is arranged on the upper end side of the medium 11 and performs edge detection and image reading of the medium 11 via the rod lens 4.
上記エレメントホルダ５は、上記光源２゜３と、ロッド
レンズ４及びＣＣＤ−次元イメージセンサ６とを各々所
定の位置に配するように保持するためのものである。The element holder 5 is for holding the light source 2.degree. 3, the rod lens 4, and the CCD-dimensional image sensor 6 so that they are respectively arranged at predetermined positions.
次に本実施例の動作を説明する。Next, the operation of this embodiment will be explained.
第３図に示すようにフィードローラ１０の回転によって
媒体１１の先端がイメージ読取り位置１２まで搬送され
る前は、光源２からの照射光は表面鏡１により反射し、
その光のほとんどは光源３の方向に反射するため、ロッ
ドレンズ４に入射しない。このため、ＣＣＤ−次元イメ
ージセンサ６が検出するイメージとしては黒く映る。As shown in FIG. 3, before the leading edge of the medium 11 is conveyed to the image reading position 12 by the rotation of the feed roller 10, the irradiation light from the light source 2 is reflected by the front mirror 1.
Most of the light is reflected in the direction of the light source 3 and therefore does not enter the rod lens 4. Therefore, the image detected by the CCD-dimensional image sensor 6 appears black.
また、第４図のように媒体１１がイメージ読取り位置１
２までフィードローラ１０により搬送されると、光源２
からの照射光は、媒体１１によって乱反射し、反射光の
一部がロッドレンズ４に入射するために媒体１１のエツ
ジ検出及び媒体のイメージの読取りを行なうことができ
る。このため、第５図に示すように、Ｃ０Ｄ−次元イメ
ージセンサ６には、イメージ１４として媒体１１が映る
。Also, as shown in FIG. 4, the medium 11 is at the image reading position 1.
2, the light source 2 is transported by the feed roller 10.
The irradiated light is diffusely reflected by the medium 11, and a part of the reflected light enters the rod lens 4, so that edges of the medium 11 can be detected and images of the medium can be read. Therefore, as shown in FIG. 5, the medium 11 is reflected on the C0D-dimensional image sensor 6 as an image 14.
なお、第５図において、イメージ１４の周りの斜線部１
３が黒く映るが、これは媒体１１がイメージ読取り位置
１２まで搬送されてもイメージ読取り位置１２の幅が媒
体１１の厚みより広いため媒体１工のサイドのエツジも
検出していることを示している。In addition, in FIG. 5, the shaded area 1 around the image 14
3 appears black, which means that even when the medium 11 is conveyed to the image reading position 12, the width of the image reading position 12 is wider than the thickness of the medium 11, so the edge on the side of the medium 1 is also detected. There is.
［発明の効果］
以上説明したように本発明は、媒体の裏面に配置された
板状の表面鏡に対して、媒体のイメージ読取り位置の斜
め方向に配された光源より光を照射することにより、表
面鏡からの反射光により媒体のエツジが検出でき、特に
媒体の厚さが薄い場合、従来のように裏当ての色が透け
てしまうことがないため、媒体の厚さに関係なく鮮明な
イメージを読取ることができる効果がある。[Effects of the Invention] As explained above, the present invention enables light to be irradiated onto a plate-shaped front mirror placed on the back side of the medium from a light source placed diagonally to the image reading position of the medium. , the edges of the media can be detected by the light reflected from the surface mirror, and the color of the backing does not show through, especially when the thickness of the media is thin. It has the effect of being able to read images.
【図面の簡単な説明】
第１図は本発明の一実施例を示す斜視図、第２図は第１
図の表面鏡の断面図、第３図は媒体検出前の状態を示す
側面図、第４図は媒体検出時の状態を示す側面図、第５
図は読取りた媒体のイメージの一例を示す平面図である
。
１：表面鏡
２．３：光源
４：ロッドレンズ
５：エレメントホルダ
６ ： ＣＣＤ−次元イメージセンサ
７：Ｓ、０２蒸着膜
８：ＡＪ２蒸着膜
９ニガラス板
１０：フィードローラ
１１：媒体
１２：イメージ読取り位置[Brief Description of the Drawings] Fig. 1 is a perspective view showing one embodiment of the present invention, and Fig. 2 is a perspective view showing an embodiment of the present invention.
3 is a side view showing the state before detecting the medium, FIG. 4 is a side view showing the state when detecting the medium, and FIG.
The figure is a plan view showing an example of an image of a read medium. 1: Surface mirror 2.3: Light source 4: Rod lens 5: Element holder 6: CCD-dimensional image sensor 7: S, 02 vapor deposited film 8: AJ2 vapor deposited film 9 Glass plate 10: Feed roller 11: Medium 12: Image reading position
Claims (1)
に行なうＯＣＲにおいて、 上記媒体の裏面に配置された板状の表面鏡と、上記表面
鏡上の媒体のイメージ読取り位置に対して斜め方向に配
され、上記イメージ読取り位置に光を照射する光源とを
設けたことを特徴とするＯＣＲの光学装置。[Claims] In OCR, which optically performs edge detection and image reading of a medium such as paper, a plate-shaped front mirror placed on the back surface of the medium and an image reading position of the medium on the front mirror are provided. An optical device for OCR, characterized in that it is provided with a light source that is arranged obliquely to the image reading position and irradiates light to the image reading position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1062910A JPH02242390A (en) | 1989-03-15 | 1989-03-15 | Optical device for ocr |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1062910A JPH02242390A (en) | 1989-03-15 | 1989-03-15 | Optical device for ocr |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02242390A true JPH02242390A (en) | 1990-09-26 |
Family
ID=13213884
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1062910A Pending JPH02242390A (en) | 1989-03-15 | 1989-03-15 | Optical device for ocr |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02242390A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011229000A (en) * | 2010-04-21 | 2011-11-10 | Pfu Ltd | Image reader |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59136877A (en) * | 1983-01-27 | 1984-08-06 | Mitsubishi Electric Corp | Character reader |
-
1989
- 1989-03-15 JP JP1062910A patent/JPH02242390A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59136877A (en) * | 1983-01-27 | 1984-08-06 | Mitsubishi Electric Corp | Character reader |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011229000A (en) * | 2010-04-21 | 2011-11-10 | Pfu Ltd | Image reader |
| US8508812B2 (en) | 2010-04-21 | 2013-08-13 | Pfu Limited | Image reading apparatus |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0467763A2 (en) | Sensor for water film on a plate in printing machine | |
| JPH02242390A (en) | Optical device for ocr | |
| US4779988A (en) | Method of distinguishing between the front and back surfaces of processed film | |
| US6018161A (en) | Adjustable adapter for scanning transparencies with a reflective document scanner | |
| JP2003012190A (en) | Method and device for detecting transparent sheet | |
| JP4362745B2 (en) | Paper identification sensor | |
| JP4033781B2 (en) | Optical object identification device, processing system, and conveyance processing system | |
| JPH09105724A (en) | Surface inspection device | |
| JPH02189408A (en) | Adhesive tape detector | |
| JPS58206908A (en) | Detection of ruggedness on finished surface | |
| US6952293B2 (en) | Document backing surface for show-through and artifact reduction | |
| JPS61140440A (en) | Document detecting mechanism | |
| JPS59220636A (en) | Detector for defect of sheet-shaped product | |
| JPS59211830A (en) | Apparatus for measuring dampening water of printer | |
| JPH02208789A (en) | Optical system for optical character reader | |
| WO2022195034A1 (en) | Method for acquiring a code marked on a sheet of glass or of glass-ceramic, and corresponding system | |
| JPH02168767A (en) | Picture reader | |
| JPH0726767Y2 (en) | Information reader | |
| JPH0220958A (en) | Double-sided read type image input device | |
| JP2594969B2 (en) | Defect detection device | |
| JPS6322524B2 (en) | ||
| JP2518643Y2 (en) | Document holding device | |
| JPS62222769A (en) | Original reducing reader | |
| JPS61145957A (en) | Original detecting mechanism | |
| JPH05312732A (en) | Method and apparatus for detecting defect of transparent sheet |