JP7390866B2 - Image reading system - Google Patents

Description

The present technology relates to an image reading system, and particularly to a method for determining the type of a read document.

An image reading device equipped with an automatic document feeder (ADF) that automatically feeds originals set on a document table one by one to the reading position can efficiently read many types of originals. It has various functions. For example, some image reading devices are equipped with a transport path that is bent 180 degrees (U-turn path) so that the operator using the image reading device can work in front of him. Additionally, since some documents may not be suitable for conveyance using a U-turn path depending on their hardness or surface condition, a straight path is provided to convey these documents. Some have a function that allows you to switch between using the . In addition, there is a function that detects the phenomenon called double feed, where multiple sheets of originals are conveyed on top of each other (double feed detection function), and a function that allows even thin paper to be conveyed without folding, tearing, or other damage. Some products also have a function (thin paper conveyance function) for These functions are widely used to read business cards, postcards, plastic cards such as membership cards, receipts, photographs, and the like.

Furthermore, it is widely practiced to utilize images read by image reading devices in various ways. For example, optical character recognition (OCR) is applied to the image of a read business card to extract the company name, person's name, etc. and registered in a business card information database, and optical character recognition is applied to the image of a read postcard. Extracts address, person's name, etc. and registers it in the destination information database. Extracts person's name, membership code, etc. by applying optical character recognition to the image of the membership card and registers it in the personal information database. Receipt. Optical character recognition is applied to the scanned image to extract the product name, amount, etc. and registered in the household account book database, and the scanned image of the photo is registered in the photo database.

However, the use of these images assumes that the type of document being scanned is known. If you do not know the type of document, you cannot make use of the image because you cannot decide whether to perform optical character recognition, the type of information to be extracted by optical character recognition, the type of database to register, etc. .

Against this background, techniques have been proposed for determining the type of document from read image data. For example, in Patent Document 1, the type of document is determined based on image size, layout recognition, character recognition, and color recognition.

Patent No. 6050843

However, with the conventional technology for determining the type of document from image data, it may not be possible to accurately determine the type of document, especially for documents with similar image characteristics. For example, business cards and membership cards are similar in size, overall layout, and color, and the information obtained through optical character recognition is also the name of a person or company, so there was a possibility of false detection using conventional methods. Similarly, business cards and receipts are similar in size and color, and the information obtained by optical character recognition is also the company name, so conventional methods could cause false positives. Furthermore, because photographs and postcards are similar in size, and both have text, pictures, landscapes, etc. drawn in free layouts, there was a possibility of false detection using conventional methods.

In view of the above, the image reading system according to the present invention includes:
An image reading system comprising an image reading device and an image processing device,
a transport unit that transports the original along a transport path;
a reading unit that optically reads the document transported by the transport unit and generates an image;
an image transmitting unit that transmits the image read by the reading unit to the image processing device;
a conveyance control unit that controls processing related to document conveyance by the conveyance unit;
an image analysis unit that analyzes the image read by the reading unit;
a determination unit that determines the type of document read by the reading unit ,
The determination unit determines whether information regarding the one or more images analyzed by the image analysis unit satisfies conditions for each document that is a candidate for determination, and further determines whether the document transport method by the transport control unit is a candidate for determination. The type of document is determined by determining whether or not the condition of the document is satisfied .

According to the present invention, it is possible to improve the accuracy of determining the document type based on the processing related to document conveyance.

FIG. 1 is a configuration diagram of an image reading system according to the present invention. FIG. 3 is a block diagram of electrical hardware of an image reading device according to the present invention. FIG. 2 is a configuration diagram of hardware related to image reading of the image reading device in Embodiment 1. FIG. FIG. 2 is a block diagram of electrical hardware of the image processing device according to the present invention. A display example of a user interface screen in Embodiment 1. 5 is a flowchart showing image reading processing in the first embodiment. 5 is a flowchart of document type determination processing according to the present invention. An example of a determination table in the present invention. Examples of size conditions in the present invention. Examples of saturation conditions in the present invention. Examples of character conditions in the present invention. An example of conveyance conditions in Embodiment 1. FIG. 3 is a configuration diagram of hardware related to image reading of an image reading device in Embodiment 2; A display example of a user interface in Embodiment 2. 7 is a flowchart of image reading processing in Embodiment 2. FIG. 7 is a configuration diagram of hardware related to image reading of an image reading device in Embodiment 3; A display example of a user interface in Embodiment 3. 7 is a flowchart of image reading processing in Embodiment 3. An example of conveyance conditions in Embodiment 3. 10 is a flowchart of image reading processing in Embodiment 4. A display example of a confirmation screen in Embodiment 4. FIG. 7 is a configuration diagram of hardware related to image reading of an image reading device in Embodiment 5; A display example of a user interface in Embodiment 5. 10 is a flowchart of image reading processing in Embodiment 5. An example of conveyance conditions in Embodiment 5.

Examples of embodiments of the present invention will be described in detail below with reference to the drawings.
(Embodiment 1)

In this embodiment, a method for determining the type of a document will be explained in particular based on information regarding the conveyance path, that is, information on whether the document is conveyed by a straight path or a U-turn path.

FIG. 1 is a configuration diagram of an image reading system according to the present invention. The image reading system includes an image reading device 101 and an image processing device 102 that are connected via a USB cable. Further, an application 103 is preinstalled in the image processing device 102. Note that the method of connecting the image reading device 101 and the image processing device 102 in the present invention is not limited to a USB cable, and may be a wired connection other than USB such as SCSI, or may be a wired connection other than USB, such as WiFi, Bluetooth (registered trademark), etc. It may also be a wireless connection.

FIG. 2 is a block diagram showing the electrical hardware of the image reading device according to the present invention. The image reading device 101 includes a sensor group 202 consisting of a line image sensor that reads an image and a sensor that detects a document, a RAM 203 that temporarily stores image data read by the sensor group 202, and a RAM 203 that is used within the image reading device 101. and a ROM 204 that stores programs. Further, the CPU 201 controls the entire image reading apparatus according to a program stored in the ROM 204 and image reading settings transferred from an interface unit 205 (described later), and transfers image data in the RAM 203 sent from the CPU 201 to the image processing apparatus 102. It also includes an interface unit 205 that receives settings related to the reading method and commands for image reading from the image processing device 102 and transfers them to the CPU 201, and a motor (not shown) that drives a roller, which is a transport unit that transports the original. A drive unit 206 is provided. Further, an image generated by reading a document is transmitted from the interface unit 205 to the image processing apparatus 102. In this case, the interface section 205 functions as a transmitting section. In this way, the CPU 201 functions as a conveyance control section that controls the drive of the conveyance section that conveys the document, and a reading control section that controls the line image sensor.

FIG. 3 is a configuration diagram of hardware related to image reading of the image reading device in this embodiment. The image reading device 101 is a device that separates and feeds a plurality of originals one by one and reads images of the fed originals. A pickup roller 301 picks up a document bundle 302 stacked on a document stacking table at a paper feed port, and feeds it along a conveyance path 303 . The separation and feeding section 304 is composed of a pair of a feeding roller and a separating roller that separate and feed the picked-up document bundle 302 one by one. The plurality of transport rollers 305 transport the fed document to the paper ejection port. The line image sensor 306 optically reads image information of the original and generates an image of the original. The line image sensor 306 is an example of an image input device that inputs an image of a document, and reads one line made up of pixels arranged in the main scanning direction (direction perpendicular to the document conveyance direction). Sub-scanning is performed by conveying the document with the conveyance roller 305. Opposing surface 307 is a white reference plate placed opposite line image sensor 306 . A flapper 308 switches the discharge port for the transported document. When the flapper 308 is tilted down, the document advances to a conveyance path 309 and is ejected to the back of the image reading device. When the flapper 308 is in the upright position, the document advances to the conveyance path 310 and is ejected toward the front of the image reading device. The registration sensor 311 is a sensor that detects the document conveyed through the conveyance path, and the reading timing by the line image sensor 306 is set based on the timing at which the document reaches the registration sensor 311. The document detection sensor 312 is a sensor that detects a document set in the paper feed port.

Note that in this embodiment and subsequent embodiments, a so-called single-sided image reading device in which the line image sensor 306 is installed only on one side of the conveyance path is used to simplify the explanation. However, the present invention is not limited to this, and a so-called double-sided image reading device in which line image sensors are installed on both sides of the conveyance path may be used.

FIG. 4 is a block diagram showing the electrical hardware of the image processing apparatus 102 in this embodiment. The image processing device 102 is an information processing device such as a personal computer. The interface unit 401 is a communication unit that communicates with the image reading device 101. Since the interface unit 401 functions as a receiving unit that receives image data transferred from the image reading device 101, it functions as an image input unit that inputs an image of a document. In other words, the interface unit 401 functions as a receiving unit that receives images transferred from the image reading device 101 that separates and feeds a plurality of originals one by one and reads images of the fed originals. The CPU 402 is a control unit that centrally controls each unit included in the image processing apparatus 102. The storage device 403 is a storage device that stores application software, an operating system, etc., and is a hard disk drive, a solid state drive, or an external device such as an SD card. RAM 404 is a volatile memory that functions as a work area for CPU 402. The input device 405 is a keyboard, a pointing device, or the like, and is a device used by an operator such as a user to input information. The display device 406 is a device that outputs information to the operator.

FIG. 5 is a diagram showing a display example of the user interface displayed by the application 103 in this embodiment. In the user interface 501, a transport path for transporting a document can be specified using a radio button 502, and reading can be started using a scan button 503. The user operates a mouse, which is an input device 405 connected to the image processing apparatus 102, to operate buttons and radio buttons on the user interface 501. In this embodiment, a radio button is used to specify either a straight path or a U-turn path, but this is just an example, and any expression or expression can be used as long as it is a selection section that allows you to select a transport method. It may be a method. Specifically, it may be written that paper is ejected to the back instead of a straight path, or that paper is ejected to the front instead of a U-turn path, or check boxes or list boxes may be used instead of radio buttons. good. Further, in this embodiment, the description will be made assuming that reading conditions are specified using a mouse connected to the image processing apparatus 102, but the reading conditions may be specified using a keyboard or a touch panel.

FIG. 6 is a flowchart showing image reading processing in this embodiment. The left side of the figure shows the processing of the image processing device, and the right side shows the processing of the image reading device. Note that the processing executed by the image processing apparatus is performed by the application 103 in this embodiment, so the following description will be made assuming that the processing is performed by the application 103, but the process is not limited to this.

In S601, the user presses a button (not shown) on the application 103 to display the user interface 501 shown in FIG. 5, and selects a desired transport path on the user interface 501. In the normal case, the user selects the U-turn path. This is because in the case of the U-turn path, both the document loading position and paper ejection position are at the front of the image reading device, so the user does not have to move to the back of the image reading device after scanning the image, which increases convenience. This is because it increases. However, when reading plastic cards or photos, users choose the straight path. This is because plastic cards are hard and unbendable and cannot pass through the curved conveyance path 310, resulting in paper jams. Further, when the document passes through the conveyance path 310, which is a curved conveyance path, the surface of the document tends to rub against the conveyance path more easily than when it passes through the conveyance path 309, which is a straight conveyance path. Therefore, in cases such as photos that are easily scratched, users may choose the straight path. That is, when the straight path is selected, there is a higher possibility that the transported document is a plastic card or a photograph than when the U-turn path is selected.

If it is detected in S602 that the user has pressed the scan button 503, the process advances to S603. In S603, the application 103 determines whether a straight path or a U-turn path is selected as the transport path. If the straight path is selected, the process proceeds to S604, and if the U-turn path is selected, the process proceeds to S607.

In S604, the application 103 stores information indicating that the straight path has been selected at a predetermined address on the RAM 404. In S605, the application 103 transmits a straight path setting instruction to the image reading apparatus 101.

In S606, the image reading apparatus 101 receives a straight path setting instruction. Upon receiving the straight path setting instruction, in step S<b>607 , the image reading apparatus 101 folds down the flapper 308 so that the documents that have been transported thereafter proceed to the transport path 309 .

On the other hand, in S608, the application 103 stores information indicating that the U-turn path has been selected at a predetermined address on the RAM 404. In S609, the application 103 transmits a U-turn path setting instruction to the image reading device 101.

In S610, the image reading device 101 receives a U-turn path designation instruction. Upon receiving the U-turn path setting instruction, in step S<b>611 , the image reading apparatus 101 raises the flapper 308 so that the documents transported thereafter proceed to the transport path 310 .

In S612, the image reading apparatus 101 transmits a flapper change completion notification to the application 103 indicating that the state change of the flapper 308 has been completed.

When the application 103 receives the flapper change end notification in S613, the application 103 transmits an image reading start instruction to the image reading apparatus 101 in S614.

When the image reading apparatus 101 receives the image reading instruction in S615, the image reading apparatus 101 controls the sensor group 202 and the driving unit 206 to read the original in S616.

In S617, the image reading device 101 transmits the read image data to the application 103.

In S618, the application 103 receives the image data and stores the received image data in the RAM 404.

In S619, the application 103 performs document type determination processing on the stored image data.

Next, FIG. 7 shows the flow of document type determination processing performed by the application 103. In the present invention, the document type is determined by a method based on majority voting using a table. As shown in Figure 8, the table (hereinafter referred to as the judgment table) has as many rows as the number of candidate document types, and as many columns as the number of judgment criteria such as size and transportation method. . Each cell in the judgment table indicates whether or not the image data to be judged has a possibility of being of the corresponding document type when compared with the corresponding judgment criteria. 1 is input to .

The details are as described below, but for example, if the size of the target image data is 55 mm x 91 mm, which is the size of a standard business card, this image can be considered as a business card based on the standard of image size. Since there is a possibility, 1 is stored in the corresponding cell, indicating that there is a possibility. On the other hand, since the size of this image deviates from the standard postcard size of 100 mm x 148 mm, there is no possibility that this image is a postcard based on the standard of image size, so the corresponding cell is 0 indicating that there is no possibility is stored.

The determination is made for all cells in the same way, and the sum of the cell values for each row is used as the likelihood for each document type, and the document type with the largest likelihood is determined as the document type of the target image.

The process will be specifically explained below using a flowchart. In step S701, the application 103 sets 0 to all cells of the determination table prepared at a predetermined address in the RAM 404.

In S702, the application 103 makes a determination based on the size of the image. Here, the determination is made based on whether the size of the determination target image satisfies the size conditions stored in advance in the storage device 403.

FIG. 9 shows an example of size conditions stored in the storage device 403 in advance. The standard size of a business card is 55 mm x 91 mm, but since there is a large variation in size depending on the creator, conditions have been set to allow a variation of 1 cm from front to back in both width and height. On the other hand, the sizes of postcards, photographs, and plastic cards are regulated by industry standards and international standards, and the sizes do not vary, so the conditions for each are determined based on standard sizes. Furthermore, although there is little variation in the width of receipts, the height can be expanded or contracted freely depending on the number of items purchased, so a condition is imposed only on the width.

As a result of the determination, the application 103 sets 1 in the size condition cell of the determination table for the document type that satisfies the condition.

Note that the size conditions in the present invention are merely examples, and the center value and variation of the conditions for each document type, and whether the conditions are imposed on only one of the width and height or on both, may be arbitrary. Further, in the present invention, the size of the image data itself is used as the image size, but when the image reading device 101 outputs an image with a margin, it detects the area where the document is captured in the image. , the size of the detected area may be used as the image size. However, the document area detection method in this case may be a general method. Furthermore, when an image in which the front and back sides of a document are combined is output by an image reading device that supports double-sided scanning, half the size of the output image may be used. Furthermore, when the image reading device outputs an image made up of multiple document surfaces, the size of one of the document surfaces may be used as the image size.

Next, in S703, the application 103 makes a determination based on the color of the image. Here, the ratio of pixels whose saturation exceeds a predetermined value to the total number of pixels included in the judgment target image is calculated, and it is determined whether the calculated value satisfies the saturation condition stored in advance in the storage device 403. Make a judgment.

FIG. 10 shows saturation conditions stored in advance in the storage device 403. Business cards and receipts generally have a lot of black and white text, so a low percentage is required. Photographs generally contain many colors, so a high ratio is required. Because postcards and plastic cards vary widely in color, a wide range of conditions has been established.

As a result of the determination, the application 103 sets 1 in the saturation condition cell of the determination table for the document type that satisfies the condition.

Note that the saturation conditions in the present invention are merely examples, and the center value and variation of the conditions for each document type may be of any value. Further, in the present invention, the determination is made based on the proportion of pixels whose saturation exceeds a predetermined value, but this is just an example, and any determination based on the color of the image may be used. For example, instead of using a percentage of the entire image, the image is divided into small regions, and for each region it is determined whether there are a predetermined percentage or more of pixels whose saturation exceeds a predetermined value. Then, the determination may be made using the number of determined small areas. Judgment based on this small area has the effect of, for example, being able to distinguish between a postcard whose paper itself is lightly colored and a photograph that shows a white sandy beach and a blue sky in half.

In S704, the application 103 makes a determination based on the characters in the image. Here, OCR is applied to the entire determination target image, and determination is made based on whether or not the obtained character string satisfies character conditions stored in advance in the storage device 403.

FIG. 11 shows character conditions stored in advance in the storage device 403. Business cards usually include your name, company name, location, etc., so make sure to include kanji that are often used in names, expressions that are often used in company names such as corporations, and addresses such as prefectures. is set as a condition. Receipts usually include the name and location of the store, the names and prices of the items purchased, etc., so there are some expressions that are often used in store names, addresses such as prefectures, and expressions that are often used in amounts. The condition is that it is included. Since postcards usually include a name and address, it is stipulated that the name must include commonly used kanji characters and address notation such as prefecture. There are a wide variety of characters that can be written on plastic cards, but for example, if it is a membership card, the name, company name, location, etc. are usually written on it, so there are kanji that are often used in names, and kanji that are often used in company names such as corporations. Conditions are stipulated to include expressions such as those used in Japanese language, and address notations such as prefectures. Since photographs usually do not contain text, the condition is that they do not contain text.

As a result of the determination, the application 103 sets 1 in the character condition cell of the determination table for the document type that satisfies the condition.

Note that the character conditions in the present invention are merely examples, and any type or number of characters may be included. Further, in the present invention, OCR is performed on the entire image, but the layout of the image may be analyzed and the position where OCR processing is performed may be changed depending on the analyzed layout.

In S705, the application 103 makes a determination based on the transport method. Here, the transport path settings stored at a predetermined address in the RAM 404 are read out, and a determination is made based on whether the read settings satisfy the transport conditions stored in advance in the storage device 403.

FIG. 12 shows transport conditions stored in the storage device 403 in advance. Since business cards, receipts, and postcards are usually transported using a highly convenient U-turn path, a U-turn path is required. For photographs and plastic cards, it is necessary to use a straight path due to constraints such as their surfaces being easily scratched or being too hard to pass through the conveyance path 310 of the U-turn path, so the straight path is specified as a condition. ing. As a result of the determination, the application 103 sets 1 in the transport condition cell of the determination table for the document type that satisfies the conditions.

Note that the conveyance conditions in this embodiment are merely an example, and any conditions may be used as long as they correspond to the characteristics of the document and the image reading device. For example, if the conveyance path is equipped with a mechanism that prevents the photograph from being scratched even if it is conveyed in a U-turn path, or if the conveyance path is equipped with a mechanism that makes the surface more likely to be scratched if it is conveyed in a straight path, then there are conditions for the photograph. You may also make a U-turn pass. Further, for a document type such as a business card that is less convenient but can be transported in a straight path, the transport conditions may be set so that both the straight path and the U-turn path apply.

In step S706, the application 103 calculates the sum of the values set in the determination table for each document type, and determines the one with the largest value as the document type of the target image data.

With the method described in this embodiment, even for documents that are difficult to determine based on image data alone, appropriate document type determination can be performed depending on whether the conveyance method is a straight path or a U-turn path.

(Embodiment 2)
In this embodiment, switching between a straight path and a U-turn path is set on the image reading device.

FIG. 13 is a configuration diagram of hardware related to image reading of the image reading device in this embodiment. The image reading device 1301 in this embodiment has a configuration in which a conveyance method changeover switch 1302 and a flapper state detection sensor 1303 are added to the image reading device 101 in the first embodiment. The conveyance method changeover switch 1302 is a switch for operating the flapper 308, and can switch the flapper 308 between a standing state and a fallen state. The flapper state detection sensor 1303 is a sensor that detects whether the flapper 308 is in a standing state or a fallen state, and can acquire the state of the flapper 308 from the image processing device 102 via the interface unit 205. It is.

Note that the configuration of the image reading system in this embodiment is the same as that in Embodiment 1, and the image reading device 1301 is connected to the image processing device 102 via a USB cable. Further, the electrical hardware of the image reading device 1301 is the same as that in Embodiment 1, and the electrical hardware configuration of the image processing device 102 is the same as that of Embodiment 1, so a description of the same structure will be omitted. The same reference numerals will be used in the explanation.

FIG. 14 is a diagram showing a display example of the user interface displayed by the application 103 in this embodiment. In the user interface 1401, reading can be started using a scan button 1402. Note that the operation of the user interface is the same as in the first embodiment.

FIG. 15 is a flowchart showing image reading processing in this embodiment. First, in step S1501, the user operates the transport method switching switch 1302 of the image reading device 1301 to select a desired transport path.

Next, in step S1502, the user presses a button (not shown) on the application 103 to display the user interface 501, and presses the scan button 1402. When the scan button 1402 is pressed, the application 103 transmits an image reading start instruction to the image reading apparatus 1301 in step S1503.

In S1504, the image reading device 1301 receives an image reading instruction. Upon receiving the image reading instruction, in step S1505, the image reading apparatus 1301 controls the sensor group 202 and the drive unit 206 to read the original, as in the first embodiment.

In S1506, the image reading device 1301 sends the read image data to the application 103.

In S1507, the application 103 receives image data and stores the received image data in the RAM 404.

In S1508, the application 103 sends a flapper state request notification.

When the image reading apparatus 1301 receives the flapper state request notification in S1509, the image reading apparatus 1301 detects the state of the flapper 308 using the flapper state detection sensor 1303 in S1510.

In step S1511, the image reading device 1301 transmits flapper state data indicating the detected state of the flapper 308 to the image processing device 102.

When the image processing apparatus 102 receives the flapper state data in S1512, the application 103 determines whether the received flapper state data indicates a straight path or a U-turn path in S1513. If the result of the determination is that it indicates a straight path, the process advances to S1514. If the result of the determination indicates a U-turn path, the process advances to S1515.

In S1514, the application 103 stores information indicating that the straight path has been selected at a predetermined address on the RAM 404.

In S1515, the application 103 stores information indicating that the U-turn path has been selected at a predetermined address on the RAM 404.

In S1516, as in the first embodiment, the application 103 performs document type determination processing on the stored image data.

With the method described in this embodiment, even for documents that are difficult to determine based on image data alone, appropriate document type determination can be performed depending on whether the conveyance method is a straight path or a U-turn path.

Note that the transport path setting method described in this embodiment is just an example, and any method may be used as long as the transport path is set by operating the main body of the image reading apparatus 1301. For example, the conveyance path may be switched after the scan button 1402 on the user interface 1401 is pressed and before the document is conveyed.

Further, the method of acquiring the conveyance path settings by the image processing apparatus 102 described in this embodiment is merely an example, and any method may be used as long as the conveyance path settings are acquired from the main body after the user sets the conveyance. For example, a method of acquiring the conveyance path settings after pressing the scan button 1402 on the user interface 1401 may be used.

Furthermore, the timing of transmitting the flapper state data is just one example, and as long as the image reading device 1301 transmits the result of detecting the state of the flapper 308 using the flapper state detection sensor 1303, the timing does not matter. It may also be transmitted at the same time as transmitting the image data to the application 103.

(Embodiment 3)
This embodiment uses ultrasonic double feed detection (hereinafter referred to as ultrasonic double feed detection) as a transport method used to determine the document type.

Ultrasonic double feed detection is widely used in image reading devices equipped with an ADF. The mechanism of ultrasonic double feed detection uses the amount by which ultrasonic waves are attenuated when they pass through a document. Specifically, an ultrasonic transmitting device installed in an image reading device emits ultrasonic waves to a document, an ultrasonic receiving device also installed in the image reading device receives the ultrasonic waves transmitted through the document, and This is done by measuring the amount of attenuation of ultrasonic waves caused by the original. Since there is a difference in the amount of attenuation when only one document is being conveyed and when two or more documents are being conveyed, it is possible to determine double feeding where two or more documents are being conveyed.

FIG. 16 is a configuration diagram of hardware related to image reading of the image reading device in this embodiment. The image reading device 1601 in this embodiment has a configuration in which the U-turn path related components are removed from the image reading device 101 in the first embodiment, and an ultrasound transmitting device 1602 and an ultrasound receiving device 1603 are added. . The ultrasonic transmitting device 1602 and the ultrasonic receiving device 1603 are installed at opposing positions across the conveyance path, and detect double feeding of documents being conveyed.

Note that the configuration of the image reading system in this embodiment is the same as that in Embodiment 1, and the image reading device 1601 is connected to the image processing device 102 via a USB cable. Further, the electrical hardware of the image reading device 1601 is the same as that in Embodiment 1, and the electrical hardware configuration of the image processing device 102 is the same as that of Embodiment 1, so a description of the same structure will be omitted. The same reference numerals will be used in the explanation.

FIG. 17 is a diagram of a user interface displayed by the application 103 in this embodiment. In the user interface 1701, the ultrasonic double feed detection function can be enabled or disabled using a radio button 1702, and reading can be started using a scan button 1703.

In this embodiment, radio buttons are used to specify whether to enable or disable ultrasonic double feed detection, but this is just an example. It may be an expression. Specifically, check boxes or list boxes may be used instead of radio buttons, and they do not necessarily have to be displayed at the same time as the scan button 1703. Note that the operation of the user interface is the same as in the first embodiment.

FIG. 18 is a flowchart showing image reading processing in this embodiment. In S1801, the user presses a button (not shown) on the application 103 to display the user interface 501, and selects a desired ultrasonic double feed detection setting on the user interface 501. Normally, the user selects to enable ultrasonic double feed detection. This is because the ultrasonic double feed detection setting allows image reading to be interrupted when double feed occurs, increasing convenience. However, when reading a plastic card, it is preferable that the user selects the ultrasonic double feed detection to be disabled. This is because in the case of plastic cards, even if only one card is actually being transported, the ultrasonic waves are greatly attenuated, and there is a possibility that it will be erroneously determined that double feeding has occurred. That is, when ultrasonic double feed detection is disabled, the possibility that the transported document is a plastic card is higher than when ultrasonic double feed detection is enabled.

Next, in S1802, when the user presses the scan button 1703, the process advances to S1803.

In S1803, the application 103 determines whether the ultrasonic double feed detection setting is enabled or disabled. If the ultrasonic double feed detection setting is valid, the process advances to S1804, and if it is invalid, the process advances to S1806.

In S1804, the application 103 stores information indicating that the ultrasonic double feed detection setting is enabled at a predetermined address on the RAM 404. Next, in step S1805, the application 103 transmits an instruction to enable ultrasonic double feed detection setting to the image reading device 1601.

When the image reading device 1601 receives the ultrasonic double feed detection setting validation instruction in S1806, the image reading device 1601 stores the ultrasonic double feed detection setting validation setting in a predetermined address on the RAM 203 in S1807.

On the other hand, in S1808, the application 103 stores information indicating that ultrasonic double feed detection has been disabled at a predetermined address on the RAM 404. Next, in S1809, the application 103 transmits an instruction to disable the ultrasonic double feed detection setting to the image reading apparatus 2201.

When the image reading apparatus 1601 receives the ultrasonic double feed detection setting invalidation instruction in S1810, the image reading apparatus 1601 stores the ultrasonic double feed detection setting invalidation setting in a predetermined address on the RAM 203 in S1811.

In S1812, the image reading device 1601 transmits an ultrasound setting change completion notification to the application 103.

When the application 103 receives the ultrasonic setting change end notification in S1813, the application 103 transmits an image reading start instruction to the image reading apparatus 2201 in S1814.

In step S1815, the image reading device 1601 receives the image reading start instruction, and in step S1816, the image reading device 1601 stores either the ultrasonic double feed detection setting enabled or the ultrasonic double feed detection setting disabled in a predetermined address on the RAM 203. Determine if it is. If the ultrasonic double feed detection setting is valid, the process advances to S1817, and if the ultrasonic double feed detection setting is invalid, the process advances to S1821.

In S1817, similarly to the first embodiment, the image reading device 1601 that has received the image reading instruction controls the sensor group 202 and the drive unit 206 to read the original. However, here, the image reading device 1601 enables the ultrasonic transmitting device 1602 and the ultrasonic receiving device 1603 only while the document is being conveyed, and monitors the attenuation of the ultrasonic waves while the document is being conveyed. Note that the method for monitoring ultrasonic attenuation in this embodiment may be a general method.

In S1818, the image reading device 1601 determines whether attenuation of a predetermined magnitude has occurred in the ultrasonic waves while the document is being conveyed. If it is determined that attenuation of a predetermined magnitude has not occurred, the process advances to S1819, and if it is determined that attenuation of a predetermined magnitude has occurred, the process advances to S1820. Note that attenuation of a predetermined magnitude means that the intensity of the ultrasonic waves received by the ultrasonic receiving device 1603 or the ratio of the intensity to the transmitted ultrasonic waves is less than a preset threshold value.

In step S1819, the image reading device 1601 determines whether conveyance of the document has ended. If the conveyance of the document has not been completed, the process advances to S1818 and continues to monitor ultrasonic attenuation. If the conveyance of the document has ended, this means that attenuation of the ultrasonic waves did not occur during the conveyance of the document. At this time, the process advances to S1823.

In S1820, the image reading apparatus 1601 transmits a multifeed occurrence notification to the application 103 and discards the read image data. In S1821, the application 103 receives the multifeed occurrence notification and ends the process.

On the other hand, in S1822, similarly to Embodiment 1, the image reading device 1601 that has received the image reading instruction controls the sensor group 202 and the drive unit 206 to read the document. Here, the image reading device 1601 disables the ultrasound transmitting device 1602 and the ultrasound receiving device 1603 and does not monitor the attenuation of the ultrasound.

In S1823, the image reading device 1601 transmits the read image data to the application 103.

In S1824, the application 103 stores the received image data in the RAM 404, and in S1825, the application 103 performs document type determination processing on the stored image data. However, the document type determination process in this embodiment differs from that in the first embodiment only in the determination method based on the transport method. The application 103 reads the ultrasonic double feed detection settings stored at a predetermined address in the RAM 404 and determines whether the read settings satisfy the transport conditions stored in advance in the storage device 403.

FIG. 19 shows transport conditions stored in advance in the storage device 403. Business cards, receipts, postcards, and photographs are usually conveyed with highly convenient ultrasonic double-feed detection enabled, so it is stipulated as a condition that ultrasonic double-feed detection is enabled. For plastic cards, it is stipulated that ultrasonic double feed detection is ineffective, as this can cause erroneous judgments.

As in the first embodiment, as a result of the determination, the application 103 sets 1 in the transport condition cell of the determination table for the document type that satisfies the conditions.

Note that this conveyance condition is just an example, and any condition may be used as long as it is compatible with the characteristics of the document and the image reading device. For example, if a particularly thick business card is used, the conditions for the business card may include disabling ultrasonic double feed detection. Additionally, for document types that are less convenient but can be transported with ultrasonic double feed detection disabled, such as business cards, the transport conditions may include both ultrasonic double feed detection enabled and ultrasonic double feed detection disabled. .

By the method described in this embodiment, even for documents that are difficult to determine based on image data alone, it is possible to appropriately determine the document type depending on whether the transport method is ultrasonic double feed detection enabled or ultrasonic double feed detection disabled. become.

Note that in this embodiment, the application 103 notifies the image reading apparatus 1601 of the timing for notifying the image reading apparatus 1601 of information on whether ultrasonic double feed detection is enabled or invalid, and the image reading start instruction from the application 103. Although the transmission timings are separated, the configuration is not limited to this, and the configuration may be such that they are transmitted at the same time.

(Embodiment 4)
In this embodiment, as the transport method used to determine the document type, a determination is made as to whether or not the detected double feeding is a false detection.

In this embodiment, the configuration of the image reading system, the electrical hardware of the image reading device, and the electrical hardware of the image processing device 102 in this embodiment are the same as those in the first embodiment. Further, the hardware configuration related to image reading of the image reading device in this embodiment is the same as that in the third embodiment. Further, the user interface displayed by the application 103 in this embodiment is the same as that in the second embodiment. The description of the same configuration as each embodiment will be omitted and will be described using the same reference numerals.

FIG. 20 is a flowchart showing image reading processing in this embodiment. When the user presses the scan button 1402 in S2001, the process advances to S2002.

In step S2002, the application 103 initializes the ultrasonic double feed detection setting information stored in a predetermined address on the RAM 404. That is, information indicating that the ultrasonic double feed detection setting is valid is stored at a predetermined address on the RAM 404.

In S2003, the application 103 transmits an image reading start instruction to the image reading apparatus 1601.

When the image reading device 1601 receives an image reading instruction in S2004, in S2005, the image reading device 1601 controls the sensor group 202 and the driving unit 206, and transmits the ultrasound receiving device 1603 in S2005, as in S1817 of the third embodiment. The document is read while detecting the attenuation of the ultrasonic waves.

In S2006, as in S1818 of the third embodiment, it is determined whether attenuation of ultrasonic waves of a predetermined magnitude has occurred while the document is being conveyed. If it is determined that attenuation has not occurred, the process advances to S2007. If it is determined that attenuation has occurred, the process advances to S2008. Note that attenuation of ultrasonic waves of a predetermined magnitude means that the intensity of ultrasonic waves received by the ultrasonic receiving device 1603 or the ratio of the intensity to transmission falls below a preset threshold value, as in the third embodiment. means.

In S2007, the image reading device 1601 determines whether conveyance of the document has ended. If the conveyance of the document has not been completed, the process advances to S2006 and continues monitoring the ultrasonic attenuation. If the conveyance of the document has ended, this means that attenuation of the ultrasonic waves did not occur during the conveyance of the document. At this time, the process advances to S12018.

In step S2008, the image reading apparatus 1601 transmits a multifeed occurrence notification to the application 103.

When the application 103 receives the multifeed occurrence notification in S2009, the application 103 displays a confirmation screen 2101 shown in FIG. 21 on the display device 406 in S2010. That is, the user is asked whether or not the double feed detected by the image reading device is a false detection. Note that the display of the confirmation screen 2101 is merely an example, and any display may be used as long as it allows selection of whether or not the result of double feeding detection is false detection.

In S2011, the user confirms whether double feeding has actually occurred. If it is a false detection, the user operates the input device 405 to press the YES button 2102, and the process advances to S2012. On the other hand, if there is no false detection, the user operates the input device 405 to press the NO button 2103, and the process advances to S2014. Incidentally, cases of false detection include cases where a sticky note or the like is pasted and the ultrasonic waves are actually attenuated, but there is no need to judge it as double feeding.

In S2012, the application 103 overwrites the information at a predetermined address on the RAM 404 from the information indicating that the ultrasonic double feed detection setting has been enabled to the information indicating that the ultrasonic double feed detection setting has been disabled. do.

In S2013, the application 103 transmits an image reading restart instruction to the image reading apparatus 1601, and the image reading apparatus 1601 that has received the image reading restart instruction resumes image reading processing, and the process advances to S2018.

On the other hand, if it is selected in S2011 that there is no false detection, the application 103 transmits an image reading end instruction to the image reading device 1601 in S2014.

Upon receiving the image reading end instruction in S2015, the image reading apparatus 1601 transmits an image reading end receipt notification to the application 103 in S2016, and also discards the read image data.

In S2017, the application 103 receives an image reading completion receipt notification and ends the process.

If double feeding is not detected or if the result of double feeding detection is a false detection, in step S2018, the image reading device 1601 transfers the read image data to the application 103, as in the first embodiment. Send to.

In S2019, similarly to the first embodiment, the application 103 stores the received image data in the RAM 404.

In S2020, similarly to the third embodiment, the application 103 performs document type determination processing on the stored image data.

By the method described in this embodiment, even for documents that are difficult to determine based on image data alone, it is possible to appropriately determine the document type depending on whether the transport method is ultrasonic double feed detection enabled or ultrasonic double feed detection disabled. become.

Note that the ultrasonic double feed detection setting method described in this embodiment is just an example, and any method may be used as long as it can instruct false detection after double feed is determined. For example, instead of displaying a confirmation screen on the image processing device 102 to confirm whether or not it is a false detection, a display device is installed in the image reading device 1601, and the display device is displayed on the installed display device and operated by the user. It's okay to have one.

Note that in the document type determination process, the amount of attenuation of ultrasonic waves during document conveyance may be used. Even when double feeding is not determined, the ultrasonic waves are attenuated as they pass through the document, and the attenuation varies depending on the material and thickness of the document. The attenuation amount may be averaged for one document or subjected to similar processing and used in the document type determination process.

(Embodiment 5)
In this embodiment, the transport function setting for thin paper is used as the transport method used to determine the document type.

A thin paper transport function for transporting very thin paper is widely used in image reading apparatuses equipped with an ADF. The thin paper conveyance function is a function that prevents thin paper from being damaged by slowing down the conveyance speed or weakening the force applied when separating a document from a stack of documents. However, while the thin paper conveyance setting has the advantage of preventing document damage, it also has disadvantages such as slow conveyance speed and reduced ability to separate documents from a stack of documents. Therefore, for normal documents, it is more convenient for the user to disable the thin paper conveyance setting.

FIG. 22 shows hardware related to image reading of the image reading device in this embodiment. The image reading device 2201 in this embodiment has a configuration in which the U-turn path is removed from the image reading device 101 in the first embodiment.

Note that the configuration of the image reading system in this embodiment is the same as that in Embodiment 1, and the image reading device 2201 is connected to the image processing device 102 via a USB cable. Further, the electrical hardware of the image reading device 2201 is the same as in the first embodiment. Further, the electrical hardware configuration of the image processing device 102 is the same as that in the first embodiment. The description of the same configuration as each embodiment will be omitted and will be described using the same reference numerals.

FIG. 23 is a diagram of a user interface displayed by the application 103 in this embodiment. In the user interface 2301, the thin paper transport function can be enabled or disabled using radio buttons 2302, and reading can be started using a scan button 2303.

In this embodiment, radio buttons are used to specify whether the thin paper transport function is enabled or disabled, but this is just an example, and any expression can be used as long as it is possible to select whether the thin paper transport function is enabled or disabled. It's okay. Specifically, check boxes or list boxes may be used instead of radio buttons, and they do not necessarily have to be displayed at the same time as the scan button 2303. Note that the operation of the user interface is the same as in the first embodiment.

FIG. 24 is a flowchart showing image reading processing in this embodiment. In step S2401, the user selects desired thin paper transport settings on the user interface 2301. Normally, the user selects to disable the thin paper conveyance function. This is because if the thin paper conveyance setting is enabled, the conveyance speed becomes slower and the ability to separate documents becomes weaker, which reduces convenience. However, when reading a receipt, the user may enable the thin paper transport function. This is because receipts may be made of very thin paper. That is, when the thin paper conveyance function is enabled, the possibility that the document to be conveyed is a receipt is higher than when the thin paper conveyance function is disabled.

When the user presses the scan button 2303 in S2402, the application 103 determines whether the thin paper conveyance setting is enabled or disabled in S2403. If the thin paper conveyance setting is valid, the process advances to S2404, and if it is invalid, the process advances to S2408.

In S2404, the application 103 stores information indicating that the thin paper conveyance function has been enabled at a predetermined address on the RAM 404, and in S2405, the application 103 transmits an instruction to enable the thin paper conveyance setting to the image reading device 2201.

When the image reading apparatus 2201 receives the thin paper conveyance setting validation instruction in S2406, the image reading apparatus 2201 stores the thin paper conveyance setting validation setting in a predetermined address on the RAM 203 in S2407.

On the other hand, in S2408, the application 103 stores information indicating that the thin paper conveyance function has been disabled at a predetermined address on the RAM 404, and in S2409, the application 103 transmits a thin paper conveyance setting disable instruction to the image reading device 2201. .

When the image reading apparatus 2201 receives the thin paper conveyance setting invalidation instruction in S2410, the image reading apparatus 2201 stores the thin paper conveyance setting invalidation setting in a predetermined address on the RAM 203 in S2411.

In step S2412, the image reading apparatus 2201 transmits a thin paper conveyance setting change completion notification to the application 103.

In step S2413, the application 103 receives the thin paper conveyance setting change end notification, and in step S2414, the application 103 transmits an image reading start instruction to the image reading apparatus 2201.

When the image reading device 2201 receives the image reading instruction in S2415, in S2416 the image reading device 2201 determines whether the thin paper conveyance setting is valid or the thin paper conveyance setting is invalid, which is stored at a predetermined address on the RAM 203. If the thin paper conveyance setting is valid, the process advances to S2417, and if the thin paper conveyance setting is invalid, the process advances to S2418.

In S2417, similarly to Embodiment 1, the image reading device 2201 that has received the image reading instruction controls the sensor group 202 and the drive unit 206 to read the original. However, here, the image reading device 2201 transports the document using a method suitable for thin paper. Note that the method of conveying the document suitable for thin paper in this embodiment may be a general method, such as slowing the conveyance speed of the separation feeding section 304 and the conveyance roller 305, or reducing the conveyance speed of the separation feeding section 304 and the conveyance roller 305. Conveyance control such as reducing the speed difference between the two may be sufficient.

Further, in S2418, similarly to Embodiment 1, the image reading device 2201 that has received the image reading instruction controls the sensor group 202 and the drive unit 206 to read the document. Here, the image reading device 2201 transports the original in a normal manner.

In S2419, the image reading device 2201 transmits the read image data to the application 103.

In S2420, the application 103 stores the received image data in the RAM 404.

In S2421, the application 103 performs document type determination processing on the stored image data. However, the document type determination process in this embodiment differs from that in the first embodiment only in the determination method based on the transport method. The application 103 reads out the thin paper transport function settings stored at a predetermined address in the RAM 404 and determines whether the read settings satisfy the transport conditions stored in advance in the storage device 403.

FIG. 25 shows an example of transport conditions stored in the storage device 403 in advance. Since business cards, postcards, photographs, and plastic cards are usually transported without the highly convenient thin paper transport function being disabled, it is stipulated as a condition that the thin paper transport function be disabled. Since there is a possibility that the receipt is transported with the thin paper transport function enabled, both the thin paper transport function is enabled and the thin paper transport function is disabled as conditions.

As in the first embodiment, as a result of the determination, the application 103 sets 1 in the transport condition cell of the determination table for the document type that satisfies the conditions.

Note that this conveyance condition is just an example, and any condition may be used as long as it is in accordance with the specific properties of the document and the characteristics of the image reading device. For example, if all the receipts being used are thin, the only condition for receipts may be to disable the thin paper conveyance function. Further, for a document type such as a business card that is not convenient but can be transported with the thin paper transport function enabled, the transport condition may be set to both enable the thin paper transport function and disable the thin paper transport function. Further, the configuration may be such that transport control suitable for the properties of documents other than thin paper can be executed.

With the method described in this embodiment, even for documents that are difficult to determine based on image data alone, appropriate document type determination can be performed depending on whether the thin paper transport function is enabled or the thin paper transport function is disabled.

The document type determination method described in the present invention is an example, and the type determination method in the present invention may be any method as long as it determines the type of document based on both image-based determination and conveyance method-based determination. It may be. For example, in this embodiment, an example has been described in which 1 is set in the determination table when it is determined that there is a possibility (conditions are met) for all the determination criteria, but it is possible to change the weight depending on the determination criteria, i.e. It may be configured to set different values such as 2 and 3 depending on the determination criteria. Further, instead of determining the document type based on the sum of the values in the determination table, it may be determined by other arithmetic calculations such as multiplication of values.

Also, instead of always deciding on the one with the highest judgment value, if the judgment value is smaller than a predetermined threshold, the type of document can be judged as undefined, or it can be judged as a specific type of document such as a photo. good. In addition, if the judgment values are tied, the judgment result may be determined based on a predetermined priority order for cases where there is a tie, or it may be determined based on the results of specific judgment criteria such as transportation method. . Further, the priority order and specific criteria in these cases may be configured so that they can be set by the user, or in the case of a tie, a user interface screen may be displayed to allow the user to make a selection.

In the above embodiment, only one conveyance condition is imposed in one embodiment, but this is for the sake of convenience in explanation, and the present invention is not limited to this, and multiple conveyance conditions are imposed in one embodiment. It may also be one that imposes transport conditions. For example, both the selection of a transport path and the selection of ultrasonic double feed detection may be imposed as transport conditions. In this way, some of the embodiments described in the above embodiments may be combined, and in that case, the hardware configuration of the device can also be used in combination.

Further, in the above embodiment, the image reading device and the image processing device are separate bodies, but the present invention is not limited to this, and the image reading device and the image processing device may be configured as a single unit. That is, the apparatus may include an image reading section having the functions performed by the image reading apparatus in the above embodiments and an information processing section having the functions performed by the image processing apparatus in the above embodiments. In that case, the image reading section and the information processing section may share one or more of the CPU, RAM, and ROM.

Furthermore, in the above embodiment, the settings of the conveyance path, the ultrasonic double feed detection setting, and the conveyance setting for thin paper are explained, but the present invention is not limited to this, and the present invention can be applied to the settings of the conveyance method. You can use anything you like. For example, transport settings for cardboard may be used. Further, a conveyance setting for a carrier sheet for protecting the document may be used. In this case, as in the fourth embodiment, the determination may be made using sensing data detected by some sensor during the conveyance operation of conveying the document. For example, with the same conveyance speed setting, the values input to the determination table may be configured to differ depending on the difference in time from the timing detected by the registration sensor 311 to the time to reach the line image sensor 306.

It also has multiple paper feed ports, and documents fed from one paper feed port (such as standard paper) are ejected in a straight path or U-turn path, and documents fed from the other paper feed port (such as card When configuring a configuration in which documents (such as books such as passports or booklets) are switched back and ejected from the other paper feed slot, each paper feed slot is equipped with a document detection sensor, and it is possible to determine which document detection sensor detected the document. The configuration may be such that the values input to the determination table are different depending on the determination table.

In addition, the processing related to document transport that changes depending on the transport method settings includes processing that changes the resolution and transport speed that changes with the resolution setting, and processing that changes the separation nip pressure in the separation feeding unit. . Based on these processes related to document conveyance, the values input to the determination table may be configured to be different, and the document type determination process may be performed.

Note that the determination table may not be used and may be used directly as the condition for the document type determination process, or the determination may be made based on whether the process related to document conveyance satisfies another conditional expression. In addition, for example, the document type determination process is performed based on the characteristics of the image data (text information, layout), and the parameters used in the document type determination process described in the above embodiment (such as the type of processing related to document transport) are used as additional determination parameters. You can use it, and vice versa. It goes without saying that the document type determination process may be performed by combining a plurality of methods in this manner.

Further, in each of the above embodiments, an example has been described in which the CPU 402 of the image processing apparatus executes the document type determination process by operating as a determination unit. It's okay. In this case, for example, instead of executing steps S1508 to S1512 in FIG. 15, the processing from step S1513 onward may be executed using information held in the image reading device. In this way, the processing executed by the image processing device in the above embodiments may be executed by the image reading device, and the processing executed by the image reading device may be executed by the image processing device.

Furthermore, in the image reading operation, when the image reading system described in each of the embodiments receives an image reading instruction, the image reading system continues to read the original until the original detection sensor 312 detects that the original bundle 302 stacked on the stacking table is no longer present. The document is conveyed while being separated one by one, and when there are no documents left on the stacking table, image reading is completed and the image data is sent to the image processing device. Although it has been described that the image processing apparatus executes the document type determination process upon receiving image data, the image processing apparatus may execute the document type determination process each time it receives image data for one document. In this case as well, the determination table may be used as described in the above embodiment, and the determination result may be stored in the RAM 404 together with the image data and notified for each document on the display screen of the application 103.

101 Image reading device 102 Image processing device 103 Application 201 CPU
205 Interface section 206 Drive section 301 Pick up roller 302 Document bundle 303 Conveyance path 304 Separation roller 305 Conveyance roller 306 Line image sensor 308 Flapper 309 Conveyance path 310 Conveyance path 401 Interface section 402 CPU
405 Input device 406 Display device

Claims (5)

An image reading system comprising an image reading device and an image processing device,
a transport unit that transports the original along a transport path;
a reading unit that optically reads the document transported by the transport unit and generates an image;
an image transmitting unit that transmits the image read by the reading unit to the image processing device;
a conveyance control unit that controls processing related to document conveyance by the conveyance unit;
an image analysis unit that analyzes the image read by the reading unit;
a determination unit that determines the type of document read by the reading unit ,
The determination unit determines whether information regarding the one or more images analyzed by the image analysis unit satisfies conditions for each document that is a candidate for determination, and further determines whether the document transport method by the transport control unit is a candidate for determination. 1. An image reading system that determines the type of a document by determining whether or not conditions for the document are satisfied . The image processing device further includes a selection unit that selects the document transport method , and a transmission unit that transmits information regarding the document transport method selected by the selection unit to the image reading device,
The image reading device further includes a receiving unit that receives information regarding the document transport method transmitted from the transmitting unit,
2. The image reading system according to claim 1, wherein the conveyance control section determines the document conveyance method based on information regarding the document conveyance method received by the reception section. The image reading device further includes a plurality of the transport paths, a selection unit that switches between the transport paths , and a transmission unit that transmits information regarding the transport path selected by the selection unit to the image processing device,
The image processing device further includes a receiving unit that receives information regarding the transport path transmitted from the transmitting unit,
The image reading system according to claim 1 , wherein the image processing device determines the document transport method based on information regarding the transport path received by the receiving unit . The image reading device includes a double feed detection function for detecting overlapping documents, which allows the conveyance control unit to switch whether or not to execute the function, and determines whether or not to execute the double feed detection function in advance. configurable,
The determination unit determines the type of document by determining whether a setting for whether or not to execute the double feed detection function as the document transport method satisfies a condition for the document to be the determination candidate. The image reading system according to claim 1 . The image reading device is capable of executing a plurality of transport controls suitable for specific properties of the paper, which can be switched by the transport control unit, and is capable of presetting a document transport method according to the properties of the paper,
1 . The determination unit determines the type of the document by determining whether the document transport method set according to the properties of the paper satisfies conditions for the document to be the determination candidate. Image reading system described in .

Images