JPH05344271A - Picture reader - Google Patents

Abstract

PURPOSE:To detect overlapped feeding and to identify an original which is overlap-fed by providing a read means reading the face/back of the identification code of the original and detecting the identification codes at the face and the back. CONSTITUTION:Optical readers 3 and 4 irradiate the face of the original by light from a light source 31. A lens 32 converges reflected light and it is converted into an electric signal by a CCD line sensor 33 consisting of electric charge connection elements. An amplifier 5 amplifies signal and it is converted into a digital signal by an A/D converter 6, is transmitted to a pciture storage device 7 and is stored. The signal transmitted by the A/D covnerter 6 is transmitted to a picture storage device 7, is transmitted to an OCR device 8 and a numeral on the original is recognized. The operation is executed on the surface and the back, and the identification numbers at the surface and the back are read. They are transmitted to an overlap feeding discrimination part 9. It compares the identification numbers. When they do not coincide, it is considered that overlap feeding occurs and an overlap feeding detection signal is transmitted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image reading apparatus for reading sequentially conveyed originals, and more particularly to an image reading apparatus capable of detecting that originals are overlapped and conveyed.

[0002]

2. Description of the Related Art In recent years, when a document is stored, a storage device has been developed for writing and storing the original on the optical disk or the magnetic disk instead of storing the original itself. Such a storage device has advantages that space can be saved and efficiency of retrieval work can be improved as compared with the case of storing the original document itself. Such a storage device is provided with an image reading device for reading image information to be saved.

The image reading device sequentially optically reads the originals sent one by one, encodes them, and stores them in a storage device. This processing speed is such that at present 1000 sheets can be processed in about 10 minutes.

[0004]

In such an image reading apparatus, when the originals are overlapped and sent at the time of conveyance, the originals are skipped and input. When skipping a large number of originals at one time, it is extremely troublesome to find out which original has been skipped. That is, at the end of reading, the number of originals is compared with the number of originals read, and if the number of originals read is smaller, it is judged that skipped scanning has occurred somewhere. It is necessary to find the skipped original and re-enter it. Retrieving and re-inputting such skipped originals puts a great burden on the operator, and no matter how fast the reading device is, if this work takes time, the There was a problem that efficiency could not be achieved.

Further, in order to solve this, double feeding is detected by detecting that the paper becomes thicker in the case of double feeding or by detecting a change in the amount of light passing through the paper. However, there is a problem in that it cannot be detected when the thickness of the original paper varies.

The present invention has been made in order to solve the above-mentioned problems, and provides an image reading apparatus having a detection device capable of surely detecting a double feed and capable of identifying a document in which a double feed has occurred. The purpose is to provide.

[0007]

In order to achieve the above-mentioned object, an image reading apparatus according to the present invention comprises a manuscript whose front and back surfaces are provided with identification codes, and a reading means which reads out the front and back identification codes of the original. , And a double feed determining means for comparing the codes read on the front and back sides and determining that they have been double fed if they do not match.

[0008]

The present invention has the above-described structure, and when a document is double-fed, the identification codes on the front and back sides will be different. By detecting this, double-fed will be detected and double-fed Identify the original in which the error occurred.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing the configuration of this embodiment. As shown in FIG. 2, the manuscript 1 is provided with identification numbers at predetermined positions on the front and back sides as OCR code 10a on the front side and OCR code 10b on the back side. This identification code is the original 1
Different numbers are given to the respective sheets, and the numbers on the front and back sides are associated with each other, and the numbers on the front and back sides correspond to each other on a one-to-one basis. In this case, it is desirable that the originals are numbered in the order of reading, and that the same number is attached to the front and back of one original, but the present invention is not limited to this.

The original 1 is conveyed on the conveying path 2 shown in FIG. 1 and is sent to the image reading section in which the optical reading devices 3 and 4 are arranged. The optical reading devices 3 and 4 have the same configuration. To explain the device 3, the light from the light source 31 illuminates the surface of the document, and the reflected light is condensed by the lens 32.
CCD line sensor 3 consisting of a charge coupled device (CCD)
3 converts into an electric signal. This is amplified by the amplifier 5 and further converted into a digital signal by the A / D converter 6. This signal is sent to the image storage device 7 to store the information on the document. This storage device may be a magnetic disk or an optical disk, and other storage devices may be used.

The signal sent from the A / D converter 6 is sent to the image storage device 7 and also sent to the OCR device 8 to recognize the number on the original. This operation is performed with the front and back sides, and the front and back identification numbers are read. The identification numbers on the front and back of these are the multi-feed discrimination section 9
Sent to.

The multi-feed discriminating unit 9 compares the above-mentioned identification numbers, and if they do not match, it is determined that a multi-feed has occurred.
Sends a double feed detection signal. When the double feed detection is detected, the double fed document is held separately from the normally fed document, and the operator performs the reading operation again. Alternatively, the apparatus may be stopped by detecting double feeding.

Next, the principle of the multifeed discrimination of this apparatus will be described with reference to FIG. FIG. 3 shows a state in which double feeding has occurred. FIG. 3 (A) shows the front state, and FIG. 3 (B) shows the back state. Since the original 1a and the original 1b are overlappedly fed and have no breaks, they can be read as one original as they are. However, the OCR code read on the front side is "123" of the original 1a, and the OCR code read on the back side is "124" of the original 1b. Therefore, the codes read on the front and back sides are different, and it is determined that double feeding has occurred.

As for the position to which the reference numeral is given, when the preceding document is on the top as shown in FIG. 3 when the multi-feed occurs, the reference numeral may be attached to the front of the table and the rear end of the back. desirable. However, the same position may be attached to the front and back sides. In this case, for example, as shown in FIG. 4, the code "124" cannot be read on the front side. Here, the codes on the front and back sides do not match, so that the double feed is detected.

Further, in the state of the back side shown in FIG. 4 (B), one document is marked with two symbols, and the double feeding may be detected by detecting this.

Further, if the identification codes attached to the same position on the front and back sides are not read at the same time, it may be judged that the multifeed is performed.

In the present embodiment, the identification code has been described as an OCR code, but the identification code is not limited to this, and a bar code or magnetic ink may be used. The magnetic ink makes it possible to read even when the surface of the original is dirty and cannot be read optically. When such an identification code is used, it is necessary to provide a reader corresponding to it.

Further, the identification codes on the front and back sides do not have to be the same code, and any identification code can be used as long as the correlation between the front and back sides can be taken.
For example, if the total of the numbers in the table is written on the back as a check digit, the number of digits of the identification code on the back can be reduced and the reader can be simplified.

[0020]

As described above, according to the present invention, it is detected that the identification codes on the back or front side are hidden by the double feeding and the identification codes on the front and back sides do not match. Can be detected. Further, since it is possible to discriminate the document in which the double feeding has occurred, it is sufficient to read only this document again, and the burden on the operator can be reduced.

[Brief description of drawings]

FIG. 1 is a diagram showing an overall configuration of an embodiment according to the present invention.

FIG. 2 is a diagram showing an example of a document used in the apparatus of this embodiment.

FIG. 3 is a diagram for explaining double feed detection of documents.

FIG. 4 is a diagram for explaining double feed detection of documents.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Original 2 Conveyance path 3 Optical reading device 4 Optical reading device 8 OCR device 9 Double-feed discrimination unit 10 Identification code (OCR character)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical indication H04N 1/04 106 Z 7251-5C 1/12 Z 7205-5C

Claims (1)

[Claims] 1. A manuscript having an identification code on the front and back, a reading unit for reading the identification code of the manuscript on the front and the back, and a code read on the front and the back are compared. An image reading apparatus comprising: a multi-feed determining unit that determines that the