JP2006025445A - Image reader - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To set an appropriate read mode according to a processing time for reading images, processing contents and the like, and to efficiently actuate each reading means for reading image of a double-sided original document. <P>SOLUTION: An image reader comprises a first read mode for reading the image of the double-sided original document by using first and second image reading means 7-1, 7-2; a mode-setting means capable of setting the second read mode for reading the image of the double-sided original document by using only the first image reading means 7-1; a document-feeding means for automatically feeding the double-sided original document to each read position of the first and second image reading means; and a control means 15. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an image reading apparatus that reads an image and sends the read image to a host computer or an image forming apparatus.

  Specifically, as this type of apparatus, a scanner device that sends a read image to a host computer, an image reading unit connected in a one-to-one relationship, and an image reading unit of a stand-alone copying machine that copies a visible image between image forming units There are image reading devices such as an image reading unit of a network copying machine, an image reading unit of a facsimile machine, or an image reading unit of an image filing device for copying a visible image between network copying machines connected to a network.

  Conventionally, for example, in an analog copying machine, an original is irradiated with light and the reflected light is guided to a photosensitive drum to form an image. For this reason, due to the limitation of the optical path system, it is necessary to read a double-sided original one by one while inverting the original. Thereafter, the copying machine was digitized and reading of images was performed by a CCD or the like, so that it was not always necessary to read images one by one. However, due to the fact that the image forming unit can form an image only on one side and the extension from the analog type copying machine, a copying machine that simultaneously reads both sides of a two-sided document has not been commercialized.

  More specifically, in the conventional copying machine, first, the image reading unit and the image forming unit are connected one-to-one. In general, the maximum speed of single-sided reading and the maximum speed of single-sided image formation are designed to be the same. On the other hand, in the case of double-sided image formation, since it takes twice or more than one side, reading may take twice or more than one side. In other words, in the past, there was no point in speeding up only the reading from both sides simultaneously.

  On the other hand, facsimiles and filing apparatuses that can simultaneously read both sides have been proposed (Patent Documents 1 and 2). However, in a facsimile or filing apparatus, the output is monochrome binary data, and no data handling monochrome multi-value data or color data has been proposed. Moreover, the reading ability of each reading means that performs simultaneous reading on both sides was the same.

JP-A-9-116714 JP-A-6-125453

  In recent years, the price of image storage means such as hard disks and DRAMs has decreased, and it has become possible to mount large-capacity image storage means in image reading apparatuses. In this case, if the double-sided original can be read simultaneously and written to the image storage means, the user can quickly return with the original. This is particularly effective in the case of a scanner device or a facsimile machine, and also effective in the case where the number of copies is large in a copying machine.

  In recent years, a network copying function has been proposed in which image data read by an image reading unit of a copying machine is formed by an image forming unit of another copying machine via a network. As described above, when the image reading unit and the image forming unit are not connected one-on-one like the conventional copying machine, the image forming speed on one side of the image forming unit is higher than the image reading speed on one side of the image reading unit. A fast case also occurs. In this case, if the double-sided original can be read simultaneously by the image reading unit, the ability of the fast image forming unit can be utilized.

  On the other hand, many image reading apparatuses of conventional copying machines that read originals one side at a time are configured to read both book originals and sheet originals. In other words, the openable sheet document feeder is located at the top of the booklet document placement section, the book document is read with the document feeder open at the top, and the document feeder is closed. It is configured to read a sheet manuscript.

  In the image reading apparatus configured to read both a book document and a sheet document in this way, when performing double-sided simultaneous reading of a double-sided document, it is preferable that the upper side reading unit is incorporated in the document feeding unit. It becomes. For this reason, the size of the reading means on the upper surface is limited. Further, since the manuscript feeder needs to be manually moved up and down depending on whether it is a book manuscript or a sheet manuscript, the weight is also limited. For this reason, if the upper surface reading means having the same reading ability as that of the lower surface reading means is mounted, there arises a problem that the manuscript feeder becomes heavier or larger, making it difficult for the operator to operate.

  In addition, a high-functional reading unit is more expensive than a low-functional one. For example, color reading means is more expensive than black and white. On the other hand, currently, there is less need for reading a large-scale duplex document in color than a large-scale duplex document in black and white. Therefore, even if it is not possible to simultaneously read both sides of a large-scale color double-sided document, it is possible to satisfy the needs of many users if both-side simultaneous reading of a large-scale black-and-white double-sided document can be performed.

Some facsimiles and filing devices have been proposed that allow simultaneous reading on both sides. These apparatuses are configured to read only a sheet document, and there is no need for the operator to manually move one reading means. The output is low-resolution black and white binary data, and since the scale of the reading means is small, there is no problem even if the same reading ability is arranged on both sides. In fact, no proposal has been made to make a difference between the reading capabilities of both sides. On the other hand, image data handled by a copying machine, particularly a color copying machine, is color high-resolution multivalued image data. And since the scale of the reading means is large, it is substantially difficult to arrange the same reading ability on both sides in terms of weight, size or cost.
Further, if the copying machine is configured via a memory or via a network as described above, it is assumed that the frequency of double-sided simultaneous reading increases. In addition, there are a wide variety of data types, and under such circumstances, there is an increasing demand for reading images appropriately and efficiently.

  The present invention has been made in view of the above circumstances, and in an image reading apparatus that performs double-sided simultaneous reading of double-sided originals, by making a difference in reading ability of each reading unit that reads both sides, an operation mode having many needs is provided. Providing an image reading device capable of simultaneous reading on both sides at a low cost and in a compact configuration, and even if the reading characteristics of each reading means are different, it is suitable according to the processing time and processing content for image reading It is an object of the present invention to set a proper reading mode and to efficiently operate each reading unit to read an image on a double-sided document.

  The image reading apparatus according to the present invention includes a first reading mode for reading an image on a double-sided document using a first image reading unit and a second image reading unit different from the first image reading unit, and the first reading unit. A mode setting unit capable of setting a second reading mode for reading an image of the double-sided document using only an image reading unit; and a first side of the double-sided document being positioned at a reading position of the first image reading unit The first state where the second surface of the double-sided document is positioned at the reading position of the second image reading means, or the second surface of the double-sided document is positioned at the reading position of the first image reading means, and The double-sided original is automatically placed at each reading position of the first and second image reading means so that the first state of the double-sided original is positioned at the reading position of the second image reading means. Document feeding means for feeding, and the mode When the setting unit sets the first reading mode, the document feeding unit feeds the double-sided document in the first state to each reading position of the first and second image reading units. When the first and second image reading units are controlled to read the images on the first and second sides of the double-sided document, respectively, and the second reading mode is set by the mode setting unit. In addition, the original feeding means feeds the double-sided original in the first state to the reading position of the first image reading means, and the first image reading means reads the first side of the double-sided original. And controlling the double-sided original to be fed to the reading position of the first image reading means in the second state so that the first image reading means reads the second side of the double-sided original. Means. .

  Further, according to the control method of the image reading apparatus according to the present invention, the first surface of the double-sided original is positioned at the reading position of the first image reading unit and the second image reading unit is different from the first image reading unit. The first state where the second surface of the double-sided document is positioned at the position, or the second surface of the double-sided document is positioned at the reading position of the first image reading means and the reading position of the second image reading means A document feeding means for automatically feeding the double-sided document to each reading position of the first and second image reading means so that the first side of the double-sided document is in the second state. A method for controlling the image reading apparatus, wherein the first image reading means and the second image reading means are used to read a double-sided original image, and only the first image reading means. To read the image of the double-sided original using A mode setting step for setting one of the reading modes to the reading mode, and when the first reading mode is set in the mode setting step, the double-sided document is placed in the first state by the document feeding means. Control is performed so that the first and second image reading units respectively read the images on the first and second sides of the double-sided document by feeding to the respective reading positions of the first and second image reading units. When the second reading mode is set in the mode setting step, the double-sided original is fed to the reading position of the first image reading means in the first state by the original feeding means. Then, the first image reading unit reads the first side of the double-sided document and feeds the double-sided document to the reading position of the first image reading unit in the second state. Reading means Characterized in that a control step of controlling so as to read the second side of the duplex document.

  According to the present invention, even when the reading characteristics of the two image reading units are different, the first image reading unit and the second image reading unit are selected according to the processing time and processing content for image reading. The two-sided original is set to either the first reading mode for reading the image of the double-sided original using the first reading mode or the second reading mode for reading the image of the double-sided original using only the first image reading means. Images can be read.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
(First embodiment)
FIG. 2 is a block diagram of the network copying machine 1 which is an image reading apparatus in this embodiment of the present invention. In addition to the color multi-value local copy function as a conventional stand-alone copier, the network copier 1 functions as a color multi-value scanner, a function as a color multi-value printer, and a network copier connected by a network. This is a multi-function machine that also has a color multi-value remote copy function that performs copying with a color multi-value facsimile function.

  A network copying machine (hereinafter abbreviated as copying machine) 1 is connected to other copying machines 4-1 and 4-2 and computers 3-1 and 3-2 through a network 2. In this embodiment, the network 2 is configured by Ethernet (registered trademark), but may be another interface as long as a plurality of devices are connected to the network.

  Although FIG. 2 shows the copying machine 1, the other copying machines 4-1 and 4-2 have the same configuration. First, when the copying machine 1 is used as a stand-alone copying machine, a document placed on a document placement unit described later is read by the image reading unit 7 and converted into an electrical signal. The reading characteristic correction unit 8 corrects the characteristics of the image reading unit 7, the image processing unit 9 performs various digital image processing, and the image forming unit 11 forms an image.

  The image reading apparatus of the present invention has a function of reading both sides of a double-sided document substantially simultaneously by two image reading units 7-1 and 7-2. The first side of the single-sided original and the double-sided original is read by the image reading unit 7-1, and the second side of the double-sided original is read by the image reading unit 7-2. Thus, by reading both sides of the double-sided document almost simultaneously, the reading time of the double-sided document can be shortened, and the time for the operator to wait for reading can be shortened.

  When performing double-sided simultaneous reading in this way, it is important to match the reading characteristics of the two image reading units 7-1 and 7-2. In particular, when the image reading unit 7 has not only the monochrome binary reading function but also the color multi-value reading function as in the present embodiment, the difference becomes conspicuous and becomes more important. For this reason, in this embodiment, the image data read by each of the image reading units 7-1 and 7-2 is corrected by the reading characteristic correction units 8-1 and 8-2, respectively, so that the reading characteristics of both are matched. Yes.

  The first image reading unit 7-1 can read color multi-valued image data, but the second image reading unit 7-2 can read monochrome multi-valued image data. Yes. In other words, the configuration is such that the capabilities of the image reading units on both sides are different. This is because the need to read a large amount of double-sided documents in color is currently less than the need to read a large amount of black and white double-sided documents. It is because it can do. In addition, the color image reading unit needs to use an RGB CCD and the circuit for processing the read data is about three times as much as the monochrome image reading unit. Furthermore, since it is necessary to increase the amount of light, it becomes large-scale, large, heavy, and expensive.

  Therefore, the size, weight, and cost of the second image reading unit 7-2 can be suppressed by configuring the second image reading unit 7-2 to be capable of reading monochrome multi-value image data. . Moreover, both sides of a large amount of black and white double-sided documents can be read simultaneously. The first image reading unit 7-1 can read color multivalued image data, but the read color image data can be converted into black and white multivalued image data by the image processing unit 9. Further, the color image data read by the first image reading unit 7-1 and the monochrome multi-value image data read by the second image reading unit 7-2 can be converted into monochrome binary image data by the image processing unit 9. It has a configuration.

  When the copying machine 1 is used as a stand-alone copying machine, the image data read by the image reading unit 7-1 on the first side of the single-sided document and the double-sided document is directly passed through the image forming unit 11 without passing through the image memory 13. To form an image. On the other hand, the second side of the double-sided document is read almost simultaneously with the first side. However, since image formation by the image forming unit 11 can be performed only one side at a time, the image data read by the image reading unit 7-2 is Once written in the image memory 13. Then, after the first surface is formed by the image forming unit, the image data of the second surface read from the image memory 13 is sent to the image forming unit 11 and image formation of the second surface is performed.

  Next, when the copying machine 1 is used as a printer, PDL data described in a page description language (PDL) sent from the computer 3 as an external device is transmitted to the external interface 5 and the CPU bus 19. Then, the image is developed as a raster image in the image memory 13 under the control of the CPU 15. Then, the image forming unit 11 is activated. The image data 14 read from the image memory 13 is sent to the image forming unit 11 via the image processing unit 9, and image formation is performed here.

  Next, when the copying machine 1 is used as a scanner, an image placed on a later-described document placement unit is read by the image reading unit 7 and converted into an electrical signal. The reading characteristic correction unit 8 corrects the characteristics of each image reading unit, and the image processing unit 9 performs various digital image processing. The image data 12 subjected to the image processing is written as a raster image in the image memory 13. Next, the raster image data read from the image memory 13 is sent to the computer 3 which is an external device via the CPU bus 19 and the external interface 5 under the control of the CPU 15.

  In the present embodiment, the raster image data is sent without being compressed, but may be sent after being compressed. In addition, transmission to the computer 3 which is an external device is performed via the network 2, and at this time, the image data is divided into a plurality of packets and output discontinuously. This is in order not to occupy the network 2 to which a plurality of devices are connected. The image data divided into a plurality of packets is restored by the receiving computer 3.

  When the copying machine 1 is used as a scanner, for a single-sided original, the image data for one side read by the image reading unit 7-1 is sent to the computer 3 in order for each page via the image memory 13. . On the other hand, for the double-sided document, the first side and the second side are read almost simultaneously, and the read image data are written in the image memory 13 in parallel. Then, with respect to one double-sided document, the image data on the first side and the image data on the second side are written in the image memory 13 and then sent to the computer 3 in order for each page.

  In this embodiment, even in the case of simultaneous reading on both sides, the pages are sent to the computer 3 in order for each page on both sides. This has the advantage that the reception process on the computer side can be made the same as in the case of one side. On the other hand, in the case of simultaneous reading on both sides, a case where image data on both sides is alternately sent to the computer 3 for each pixel or for each line is also included as an embodiment of the present invention. In this method, it is necessary to change the reception processing on the computer side in the case of simultaneous reading on both sides to the case of one side, but transfer can be started before all the image data on both sides are written in the image memory 13, and the image memory 13 There is an advantage that the capacity of the battery may be small.

  In this embodiment, image data reading and sending to the computer 3 are repeated for each original document. This has the advantage that the capacity of the image memory 13 can be relatively small. On the other hand, the present invention also includes a case in which a large amount of image memory such as a hard disk is provided and image data of a plurality of documents placed on the document feed placement unit 31 is written to the image memory and then sent to the computer 3. It is included as another embodiment of the invention. In this case, the image data read by single-sided reading or double-sided simultaneous reading is written into the image memory 13 asynchronously with sending to the computer 3. On the other hand, the image data read from the image memory 13 is sent to the computer 3 asynchronously with the image reading. With this configuration, even if it takes a long time to send the data to the computer 3, the image can be read without waiting for the completion of the transmission, so that the reading operation is completed quickly and the operator leaves the document quickly. There is an advantage that can be.

  Next, when the copying machine 1 is used as a network copying machine on the reading side, it is sent to other copying machines 4-1 and 4-2 which are external devices in the same manner as when used as a scanner. However, the use of the scanner and the use of the network copying machine on the reading side are different because the applied functions are different. For example, a copying machine needs various functions such as enlargement, reduction, trimming, masking, and center movement. When it is used as a scanner, it can be freely processed later on the computer side, so it is not always necessary. As a copying machine, high productivity cannot be obtained unless the reading-side copying machine and the image-forming-side copying machine operate in synchronism with respect to mechanical operation. On the other hand, when used as a scanner, all processing on the computer side is electrical processing, so there is a difference that it is not necessary to synchronize and may be asynchronous. When the copying machine 1 is used as a network copying machine on the reading side, the method for sending image data of a double-sided document is the same as that when used as a scanner.

  Next, when the copier 1 is used as a network copier on the image forming side, image data sent from other copiers 4-1 and 4-2, which are external devices, in the same manner as when used as a printer. And image formation is performed. However, since the applied function differs between the case of using as a printer and the case of using as a network copying machine on the image forming side, different processing is performed. For example, in the case of a printer, it receives PDL data from a computer, develops it into raster image data, and prints it. In the case of an image forming side network copying machine, there is a difference that raster image data is received from a reading side network copying machine and printed. In the case of a printer, the processing on the computer side and the processing on the printer side do not need to be synchronized, and are processed in a batch process. In the case of a network copying machine on the image forming side, there is a difference that the forming operation needs to be performed in synchronization with the reading operation of the network copying machine on the reading side in order to increase productivity.

  Next, when the copying machine 1 is used as a facsimile on the reading side, the read raster image data is written into the image memory 13 in the same manner as when used as a scanner. Next, the raster image data in the image memory 13 is encoded by the CPU 15 using the JPEG method or the like, and is written into the image memory 13 again as code data. Next, the code data read from the image memory 13 by the CPU 15 is written and modulated in the modem 20, and is sent to another facsimile apparatus via the public line 21 based on the communication function defined by the CCITT recommendation. . When the copier 1 is used as a facsimile on the reading side, the method for sending image data of a double-sided document is the same as that when used as a scanner.

  Next, when the copying machine 1 is used as a facsimile on the image forming side, the modulation data sent via the public line 21 is returned to the code data by the modem 20. The code data is once written in the image memory 13, then decoded by the CPU 15, and written again as raster image data in the image memory 13. Next, the raster image data 14 read from the image memory 13 is sent to the image processing unit 14. Here, image processing such as resolution conversion is performed, and the image data 10 in the raster format subjected to the image processing is sent to the image forming unit 11 where image formation is performed.

  As described above, the first-side document reading unit 7-1 and the second-side document reading unit 7-2 perform stand-alone copying when performing a scanning function, performing remote copying as a network copying machine, performing facsimile transmission, or the like. When performing local copy as a machine, it is used in both cases. The operation unit 6 is used for giving various operation instructions by the operator. The CPU 15 controls the copying machine 1, and the ROM 16 is used for storing a program operating on the CPU 15 and fixed data. The volatile RAM 17 is a rewritable memory that holds work data in which content data is volatilized when the power is turned off. On the other hand, the non-volatile RAM 18 is a rewritable memory that holds semi-permanent data that does not volatilize the contents even when the power is turned off.

  FIG. 3 is an external view of the copying machine 1. FIG. 3A shows a state when reading a sheet document, and FIG. 3B shows a state when reading a book document. A main body 39 of a scanner unit for reading a document is placed on the upper part of the image forming unit 11, a document feeding unit 40 is arranged on the upper part, and an operation unit 6 is arranged on the front side. As shown in FIG. 3B, the document feeder 40 is configured such that the front side is opened upward with the back side as a fixed point. When reading a sheet document, a plurality of sheet documents are placed on a document feed placement unit (to be described later) on the document feed unit 40 with the document feed unit 40 closed as shown in FIG. Instruct to read. On the other hand, when reading a book document, the document feeder 40 is raised, the book document is placed on the document placement unit 41, and reading is instructed.

  FIG. 4 is a schematic cross-sectional view of the scanner unit with the document feeding unit 40 closed as viewed from the front. When reading a book document, the document feeder 40 is raised, the document is placed downward on the document placement unit 41, and the document feeder 40 is lowered to press the document. The first image reading unit 7-1 is moved to the reading start position 43 by a drive system (not shown). Next, reading is performed by scanning in the direction of the arrow 42. The image reading unit 7-1 includes a light source (not shown), an image reading element such as a CCD, and an optical system. The light emitted from the light source passes through the document placing portion 41 made of glass and is reflected by the document. Image data is read by reading the reflected light with an image reading element.

  On the other hand, when reading a sheet document, first, a sheet document composed of one or more sheets is placed on the document feed placement unit 31. Documents placed on the document feed placement unit 31 are fed one by one from above by rollers 32, guides 33 and rollers 34. Then, it passes in front of the second image reading unit 7-2 and the first image reading unit 7-1, and is discharged to the document discharge unit 38 by the sheet-like roller 35, guide 36 and roller 37. The first image reading unit 7-1 scans the first side of the single-sided document and the double-sided document (the upper side when placed on the document feeding placement unit 31) by the first image reading unit 7-1. Is read. On the other hand, the second surface of the double-sided document (the lower surface when placed on the document feed placement unit 31) is imaged by the second image reading unit 7-2 as the document passes. Is read.

  Similarly to the first image reading unit 7-1, the second image reading unit 7-2 includes a light source (not shown), an image reading element such as a CCD, and an optical system, but the first image reading unit 7- 1 is used at a fixed position. Further, as shown in FIG. 3, the second image reading unit 7-2 is built in the document feeding unit 40, and when reading a book document, the document feeding is performed as shown in FIG. It moves with the opening to the top of the section 40 and is not used for reading. On the other hand, in the case of a sheet document, it moves with closing the document feeder 40 as shown in FIG.

  In the case of a book document, the entire document is read by fixing the document and scanning the image reading unit 7-1. In the case of a sheet original, the image reading units 7-1 and 7-2 are fixed, and the original is read by moving the original. The reading of the book original is performed by scanning the image reading unit 7-1 in the direction of the arrow 42 in order to make the scanning direction of the sheet original and the scanning direction of the book original relatively the same as the original. is there. However, even in the local copy, if the read image data is stored once in the image memory 13, the difference in scanning direction can be absorbed in the image memory 13. In such a case, the image reading unit 7-1 may be scanned in the direction opposite to the arrow 42 when reading the book document.

  In FIG. 4, the first image reading unit 7-1 and the second image reading unit 7-2 are arranged with their positions slightly shifted. This is to avoid the possibility that if the light is read at the same position, the light emitted from the light source on one side passes through the paper and adversely affects the image reading on the reverse side.

  The image reading apparatus according to the present embodiment is an image reading apparatus capable of simultaneous reading on both sides, but also includes document reversing units 44 to 47. This is because the second image reading unit 7-2 cannot read the color image data, so that both sides of the color original are sequentially read using the first image reading unit 7-1. Is. More specifically, the color double-sided original placed on the document feeding placement unit 31 is fed one by one from the top by the roller 32, the guide 33, the roller 34, and the sheet-like roller 35, and the first image reading unit. The first surface is read passing in front of 7-1.

  Thereafter, the document is conveyed in the reverse direction by the sheet-like roller 35 and roller 34, reversed through the document reversing units 44 to 47, passes again in front of the first image reading unit 7-1, and reaches the second surface. Reading is performed and the document is discharged to the document discharge unit 38. If each side of a color double-sided original is sequentially read in this way, it takes twice or more times including the reversal time compared to the case where double-sided simultaneous reading is performed. Yes.

  FIG. 5 is an external view of the operation unit 6 and the document feeding unit 40, and is a view of the scanner unit of the copying machine 1 as viewed from above. The operation unit 6 is disposed on the front side of the apparatus, and the document feeding unit 40 is disposed on the document placing unit. The operation unit 6 includes a large liquid crystal display unit 55, a numeric keypad 56, a cancel key 57, an OK key 58, a scan setting start key 51, a remote copy setting start key 52, a FAX setting start key 53, and a local copy setting start. It consists of a key 54 and the like. Arbitrary characters can be displayed on the liquid crystal display unit 55, and various messages can be displayed on the liquid crystal display unit 55 so that operations can be performed interactively.

  On the other hand, the document feeder 40 is a device often used in a copying machine, and is a device for feeding a plurality of placed sheet documents one by one to a reading position. Documents placed on the document feed placement unit 31 are fed one by one, read, and discharged to the document discharge unit 38.

  FIG. 6 is an example of an operation flow when the copying machine 1 is used as a scanner, and shows a flow of messages displayed on the liquid crystal display unit 55 in the operation unit 6. First, when the scan setting start key 51 in the operation unit 6 is pressed, a screen 61 is first displayed to select a destination computer to which the scanned image is to be sent. On this screen, pre-registered computers are displayed in a list of 1 to 4 and selected from the list. For example, A of 1 corresponds to the computer A of FIG. Although only four lists are displayed on the screen 61 for simplification of explanation, many lists can be displayed by scrolling, switching pages, or performing grouping. The selection is instructed using the numeric keypad 56 on the operation unit, and is confirmed by pressing the OK key 58.

  When the list display is selected on the screen 61, the screen shifts to the screen 62, and a list of computers currently connected to the network is displayed, from which a destination computer to which the scanned image is to be sent is selected. In order to check a computer currently connected to the network, for example, an inquiry as to whether or not it has a function of receiving a scanned image is broadcast to all devices connected to the network. Then, it is performed by checking the response of each device. When the destination computer to which the scanned image is to be sent is determined, the screen moves to the screen 63, where it is specified whether the document is single-sided or double-sided.

  Next, on the screen 64, the color mode to be used is designated. In the case of this embodiment, there are three types of color modes: full color RGB 24-bit type, monochrome multi-value composed of 8 bits of black and white, and monochrome binary composed of 1 pixel of monochrome. Next, on the screen 65, a reading size is designated. In the case of this embodiment, there are four types of reading sizes: A4 SEF (Short Edge Feed) which is A4 vertical, A4 which is A4 horizontal, B4 which is B4 vertical, and A3 which is A3 vertical. Next, on the screen 66, the resolution of the read image is designated. The image reading unit of the present embodiment has a reading resolution of 400 dpi, and can specify a resolution of 400 dpi or less on the screen 66. When a resolution of less than 400 dpi is designated, the resolution is realized by thinning and reducing the image read at 400 dpi by the image processing unit 14. If the resolution is increased, a high-resolution image can be obtained, but the image size also increases, the disk capacity for saving increases, and the transfer time also increases.

  Next, on the screen 67, the format in which the data is saved when it is read and saved in the computer is selected. Raw data means that the read data is stored as it is without a header or the like. The TIFF format or the PICT format is a format that is often used in the computer world, and means that information such as an image size is stored in a format including a header or the like. JPEG compression means that JPEG compression, which is one of standard compression methods, is performed and then stored in a computer. UNIX (registered trademark) compression means compression by a standard compression method in UNIX (registered trademark), and then storing in a computer. There are various other image formats, but one of various formats is selected on this screen.

  Next, on the screen 68, the name of the file to be saved is displayed, and a final instruction screen for whether or not to perform scanning is displayed. Image reading is started by placing a sheet document on the document feed placement unit 31 or placing a book document on the document placement unit 41 and instructing scanning. Then, the designated reading size, designated color mode, and designated resolution image data are sent to the designated computer and stored in the designated file format. At this time, if a double-sided document is instructed on the screen 63, both sides of the document are read. On the other hand, when a single-sided document is instructed, only one side of the document is read. In this embodiment, a file name is automatically generated, a serial number is given in the scanning order after the prefix “IMG”, and finally “.” Indicating that the file format is raw data. raw ”.

  Next, FIG. 7 shows an example of an operation flow when the copying machine 1 is used as a network copying machine. First, the remote copy setting start key 52 in the operation unit 6 is pressed. Then, a screen 71 is first displayed, and a destination network copying machine to which the scanned image is sent is selected. On this screen, network copiers registered in advance are displayed as a list in 1 to 4 and selected from the list. Since the computer as the destination as the scanner in FIG. 6 is different from the network copier as the destination as the network copying machine in FIG. 7, different destinations are registered.

  When the list display is selected on the screen 71, the screen moves to the screen 72, where a list of network copying machines currently connected to the network is displayed, from which a destination network copying machine to which the scanned image is to be sent is selected. In order to check the network copier currently connected to the network, for example, an inquiry about whether or not it has a remote copy function is broadcast to all devices connected to the network, and the response of each device to that is broadcast. Do by examining. When the destination network copying machine to which the scanned image is to be sent is determined, the screen moves to a screen 73, where it is specified whether the document is single-sided or double-sided.

  Next, on the screen 74, the color mode to be used is designated. Next, on the screen 75, the number of copies to be formed by the destination network copying machine is designated. On the screen 76, the paper feed stage of the destination network copier for printing is selected. Next, on the screen 77, the finishing process performed by the destination network copying machine is instructed. The finishing process is a post-process that is performed on a sheet after an image is formed on the sheet, and includes a sort process that rearranges each copy, a staple process that staples sorted sheets, or a sorted process. This means binding processing that glues and binds paper.

  Next, the screen 78 is a final instruction screen for determining whether or not to perform remote copy. Image reading is started by placing a sheet document on the document feed placement unit 31 or placing a book document on the document placement unit 41 and instructing the start. The read image data is sent to the designated network copying machine. Then, in the designated network copying machine 23, the designated number of copies are printed on the paper fed from the designated paper feed tray, and the designated finishing process is performed. At this time, if a double-sided document is instructed on the screen 73, both sides of the document are read. On the other hand, when a single-sided document is instructed, only one side of the document is read.

  Next, FIG. 8 shows an example of an operation flow when the copying machine 1 is used as a FAX. First, when the FAX setting start key 53 in the operation unit 6 is pressed, a screen 81 is first displayed to designate a destination for facsimile transmission. Next, on the screen 82, it is designated whether the document is single-sided or double-sided. Next, on the screen 83, the color mode is instructed. Next, on the screen 84, the resolution is instructed. In the case of facsimile transmission, either fine, which means 400 dpi, or normal, which means 72 dpi, can be selected. Next, on the screen 85, a reading size is designated.

  Next, the screen 86 is a final instruction screen for performing facsimile transmission. Image reading is started by placing a sheet document on the document feeding placement unit 31 or placing a book document on the document placement unit 41 and instructing the start, and the read image data is transferred to the public line 21. And sent to another facsimile machine. At this time, if a double-sided document is instructed on the screen 82, both sides of the document are read. On the other hand, when a single-sided document is instructed, only one side of the document is read.

  Next, FIG. 9 shows an example of an operation flow when the copying machine 1 is used as a stand-alone copying machine. First, when the local copy setting start key 54 in the operation unit 6 is pressed, a screen 91 is first displayed to specify whether the document is single-sided or double-sided. In the case of local copying, it is not necessary to select a transmission destination because the printer unit 11 of the copying machine 1 itself forms an image. Next, on the screen 92, the original is read and color image data is obtained and formed as a color image, or the original is read and black and white multi-value image data is obtained and formed as a black and white multi-value image, or the original is read. In this case, a color mode for instructing monochrome binary image data to be formed as a monochrome binary image is designated.

  Next, on the screen 93, the number of copies to be formed by the printer unit 11 is instructed. Next, on the screen 94, the paper feed stage of the printer unit 11 of the copying machine 1 itself is selected. Next, on the screen 95, the finishing process performed by the printer unit 11 is instructed. Next, the screen 96 indicates the resolution. In the case of local copy, either 400 dpi or 200 dpi can be selected.

  Next, the screen 97 is a final instruction screen for performing local copy. Image reading is started by placing a sheet document on the document feed placement unit 31 or placing a book document on the document placement unit 41 and instructing the start. The read image data is sent to the printer unit 11 of the copying machine 1 itself. In the printer unit 11, the number of copies designated in the designated color mode is printed on the paper fed from the designated paper feed tray, and the designated finishing process is performed. At this time, if a double-sided document is instructed on the screen 91, both sides of the document are read. On the other hand, when a single-sided document is instructed, only one side of the document is read.

Here, FIG. 1 is a flowchart for explaining a control flow of the network copying machine in the first embodiment.
First, after the power is turned on, in step S11, it is checked whether or not the scan setting start key 51 on the operation unit 6 has been pressed. If it has been pressed, the scan setting process in steps S12 to S15 is performed.

  First, in step S12, according to the operation flow of FIG. 6, the operator designates the destination 25 and sets the operation mode such as the document type, color mode, document size, and resolution. Next, in step S13, it is determined whether or not double-sided simultaneous reading is possible for the designated operation mode. Since the second image reading unit 7-2 of the present embodiment has a black and white multi-value reading capability, it cannot read a color image. Therefore, only when the original type is designated as double-sided on the screen 63 and monochrome multi-value or black-and-white binary is designated as the color mode on the screen 64, simultaneous double-sided scanning can be executed.

  In the operation mode in which both-sided simultaneous reading is possible, in step S14, each side of the double-sided original is read almost simultaneously using the image reading units 7-1 and 7-2. The read image data is once written in the image memory 13, and then the image data read from the image memory 13 is transmitted to the computers 3-1, 3-2, etc. via the network 2. In the case of simultaneous reading on both sides, image reading is performed on both sides simultaneously, but in the present embodiment, transmission of image data is performed sequentially on each side.

  On the other hand, in the operation mode in which the double-sided simultaneous reading is not possible, the single-sided reading is performed using the first image reading unit 7-1 in step S15. The read image data is once written in the image memory 13, and then the image data read from the image memory 13 is transmitted to the computers 3-1, 3-2, etc. via the network 2. In step S15, if the color mode is full-color for a double-sided document, one side is read using the first image reading unit 7-1, then the document is reversed using the document reversing units 44 to 47, and the remaining pages are read. One side is read by using the first image reading unit 7-1.

  In step S11, if the scan setting start key 51 has not been pressed, it is checked in step S16 whether the remote copy setting start key 52 has been pressed. If it has been pressed, the remote copy setting process in steps S17 to S20 is performed. I do.

  First, in step S17, according to the operation flow of FIG. 7, the operator designates a destination and sets operation modes such as a document type, a color mode, the number of copies, and a paper feed stage. Next, in step S18, it is determined whether or not double-sided simultaneous reading is possible for the designated operation mode. In this case, simultaneous duplex reading can be performed only when the document type is designated as double-sided on the screen 73 and monochrome multivalue or monochrome binary is designated as the color mode on the screen 74.

  In the operation mode in which both-sided simultaneous reading is possible, in step S19, both-sided simultaneous reading is performed. The read image data is once written in the image memory 13, and then the image data read from the image memory 13 is transmitted to the computers 3-1, 3-2, etc. via the network 2. In the case of simultaneous reading on both sides, image reading is performed on both sides simultaneously, but in the present embodiment, transmission of image data is performed sequentially on each side.

  On the other hand, in the operation mode in which the double-sided simultaneous reading is not possible, in step S20, single-sided reading is performed using the first image reading unit 7-1. Then, the read image data is temporarily written in the image memory 13, and then the image data read from the image memory 13 is transmitted to the other network copying machines 4-1, 4-2, etc. via the network 2. In step S20, when the color mode is full color for a double-sided document, each surface is sequentially read by the first image reading unit 7-1 using the document reversing units 44 to 47 as in the case of scanning.

  If the remote copy setting start key 52 has not been pressed in step S16, it is checked in step S21 whether the FAX setting start key 53 has been pressed. If it has been pressed, the facsimile transmission setting process in steps S22 to S25 is performed. I do.

  First, in step S22, according to the operation flow of FIG. 8, the operator designates a destination and sets operation modes such as a document type, a color mode, a resolution, and a document size. Next, in step S23, it is determined whether or not double-sided simultaneous reading is possible for the designated operation mode. Also in this case, simultaneous duplex reading can be performed only when the original type is designated as double-sided on the screen 82 and monochrome multi-value or black-and-white binary is designated as the color mode on the screen 83.

  In the operation mode in which both-sided simultaneous reading is possible, in step S24, both-sided simultaneous reading is performed. The read image data is temporarily written in the image memory 13, and then the image data read from the image memory 13 is encoded by the CPU 15 and returned to the image memory 13 once. Next, the data is transmitted to another facsimile machine via the modem 20 and the public line 21. In the case of simultaneous reading on both sides, image reading is performed on both sides simultaneously, but in the present embodiment, transmission of image data is performed sequentially on each side.

  On the other hand, in the operation mode where double-sided simultaneous reading is not possible, in step S25, single-sided reading is performed using the first image reading unit 7-1. The read image data is once written in the image memory 13, and then the image data read from the image memory 13 is encoded by the CPU 15 and returned to the image memory 13. Then, another facsimile apparatus is connected via the modem 20 and the public line 21. Send to. In step S25, when the color mode is full-color for a double-sided document, each surface is sequentially read by the first image reading unit 7-1 using the document reversing units 44 to 47 as in the case of scanning.

  If the FAX setting start key 53 has not been pressed in step S21, it is checked in step S26 whether the local copy setting start key 54 has been pressed. If the button is not pressed, the process returns to step S11. If the button is pressed, the local copy setting process in steps S27 to S30 is performed.

  In step S27, the operation mode such as the document type, color mode, number of copies, and resolution is set by the operator according to the operation flow of FIG. Next, in step S28, it is determined whether or not double-sided simultaneous reading is possible for the designated operation mode. Also in this case, the simultaneous duplex reading can be executed only when the document type is designated as double-sided on the screen 91 and monochrome multi-value or black-and-white binary is designated as the color mode on the screen 92.

  If the operation mode is capable of reading both sides simultaneously, in step S29, both sides are read simultaneously. The image data read by the image reading unit 7-1 is directly sent to the image forming unit 11 to form an image. On the other hand, the image data read by the image reading unit 7-2 is once written in the image memory 13, and after the formation of the image data of the surface read by the image reading unit 7-1 is completed, the image data is read from the image memory 13. It is. The read image data is sent to the image forming unit 11 for image formation. That is, in the case of simultaneous reading on both sides, image reading is performed on both sides simultaneously, but in the case of this embodiment, image data is formed on each side sequentially.

  On the other hand, in the operation mode in which double-sided simultaneous reading is not possible, one-side reading is performed using the first image reading unit 7-1 in step S30, and the read image data is directly sent to the image forming unit 11 to form an image. Is done. In step S30, when the color mode is full-color for a double-sided document, each surface is sequentially read by the first image reading unit 7-1 using the document reversing units 44 to 47 as in the case of scanning.

  In the determination of whether or not double-sided simultaneous reading is possible in steps S13, S18, S23, and S28, double-sided simultaneous reading is impossible when the document feeder 40 is open as shown in FIG. Therefore, in this embodiment, at this time, if one side is designated as the document type, it is determined that the document is a book document, and the book document is read in steps S15, S20, S25, and S30, respectively. On the other hand, if both sides are instructed as the document type, an error is displayed. On the other hand, for example, when the document feeder 40 is opened as shown in FIG. 3B, a configuration in which both sides cannot be designated as the document type is included as another embodiment.

  In FIG. 1, the control flow in the case of remote copy reception, facsimile reception and printing is not shown for the sake of simplicity of explanation, but these processing requests are received from the external device via the network 2 or the public line 21. In such a case, control is performed according to the request.

(Second Embodiment)
The second embodiment of the present invention differs from the first embodiment only in the reading capability of the second reading means, the method of setting the operation mode of each function, and the method of determining whether to perform double-sided simultaneous reading. . Here, only these different parts will be described.

  First, the first point different from the first embodiment is that the image reading apparatus of the present embodiment has the same configuration as the image reading apparatus of the first embodiment (block diagram of FIG. 2), but the image reading of each surface is performed. The difference is that the reading capabilities of the sections 7-1 and 7-2 are configured as shown in the table of FIG.

  That is, first, the image reading unit 7-1 used for reading both the book document and the sheet document can read color multi-value image data and convert the image multi-value data by the image processing unit as in the first embodiment. Monochrome binary data can also be obtained. Also, the reading resolution is 400 dpi, and this is also converted by the image processing unit, so that data having a lower resolution can be obtained. Further, since it is composed of a CCD having an A4 longitudinal width, it is possible to read a document size up to A3 length. The reading speed of the A4 vertical document is 2 seconds. However, the A4 vertical document can be read in 4 seconds by thinning out every line in the image processing unit.

  On the other hand, the image reading unit 7-2 used only for reading the second side of the double-sided sheet original is configured to read only monochrome binary data. Compared with a color or monochrome multi-value image reading unit, the monochrome binary image reading unit has smaller components such as a CCD and requires less light. In addition, the circuit scale is small, which is advantageous in terms of size, weight, cost, and the like. The reading resolution is 200 dpi, which is also advantageous in terms of cost because a cheap CCD can be used. In addition, since it is composed of an A4 short width CCD, it can read the document size up to A4 length. In this respect, a cheap CCD can be used, and parts such as a CCD can be miniaturized. In addition, the reading speed of the A4 vertical document is 4 seconds. By operating at a low speed, the amount of light required for reading can be reduced, and by reducing the operating speed of the circuit, inexpensive parts can be used. This is advantageous.

  In the first embodiment, the reading capabilities of the image reading units 7-1 and 7-2 are only the difference between color multi-value and monochrome multi-value. In the present embodiment, as shown in FIG. 10, there are also differences in terms of multi-value / binary, reading resolution, reading size, and reading speed. As a result, the image reading unit 7-2 is more advantageous in terms of size, weight, and cost than the image reading unit 7-1.

  On the other hand, in the present embodiment, since the reading capability of the image reading unit 7-2 is as shown in FIG. 10, simultaneous duplex reading is possible only when reading is possible with this capability. Specifically, this is a case of monochrome binary, a resolution of 200 dpi or less, and a document size of A4 portrait or less. However, at present, since a large number of double-sided documents are mostly black and white binary images of A4 size, even in the configuration of this embodiment, many double-sided documents can be read simultaneously on both sides.

  FIG. 11 is a flowchart for explaining a control flow of the multifunction machine according to the second embodiment. Since the control flow of the present embodiment is similar to the control flow of the first embodiment, only differences in control from the control flowchart (FIG. 1) of the first embodiment will be described here.

In FIG. 11, only the processes of step S41, step S42, step S46, step S47 and step S53 are different from the case of FIG.
First, in step S41, it is checked whether or not a scan instruction command is received from the computer 3 via the network 2. In the first embodiment, setting of the scanning operation mode and a scanning start instruction are instructed using the operation unit 6. In this embodiment, a command is given from the computer 3 via the network 2.

  In step S42, the image data destination and the scanning operation mode are received from the computer 3 via the network 2 in the same manner. In step S43, it is determined whether or not simultaneous reading on both sides is possible in this operation mode. In the case of the present embodiment, both sides of the original are simultaneously specified by a command from the computer 3 only when a double-sided original is specified as the operation mode, monochrome binary is specified, A4SEF is specified as the original size, and a resolution of 200 dpi or less is specified. Reading is possible.

  In step S46, it is checked whether a remote copy instruction command is received from the computer 3 via the network 2. In the first embodiment, setting of the remote copy operation mode and a remote copy start instruction are instructed using the operation unit 6. In this embodiment, a command is given from the computer 3 via the network 2.

  In step S47, the image data destination and the remote copy operation mode are received from the computer 3 via the network 2 in the same manner. Next, in step S48, it is determined in the same manner as in step S43 whether double-sided simultaneous reading is possible in this operation mode.

  Next, in step S53 in the facsimile transmission process, instead of determining whether or not double-sided simultaneous reading is possible, it is determined only whether or not the document is a double-sided document and whether or not double-sided simultaneous reading is to be performed is determined. This is because in the present embodiment, in the case of facsimile transmission, the binary is monochrome, the resolution is 200 dpi or less, and the document size is limited to A4 portrait or less. Therefore, when using the facsimile transmission function regardless of the designated operation mode, double-sided originals are always read simultaneously.

  In the present embodiment, in cases other than facsimile transmission, whether to perform double-sided simultaneous reading is changed depending on the operation mode used. This is also included as an example in the case where whether to perform double-sided simultaneous reading for each function is changed. For example, a configuration in which only double-sided simultaneous reading is performed only for facsimile transmission and other than simultaneous duplex scanning is included as an example. Even in the case of the same facsimile transmission, in the case of memory transmission in which all originals are sent after being put into the image memory, double-sided simultaneous reading is performed, and in the case of direct transmission in which originals are read and transmitted in parallel, both sides are scanned. A configuration in which simultaneous reading is not performed is also included as an embodiment.

  In the above embodiment, an A4 / A3 series document has been described. However, the same applies to an inch document such as a letter / 11 × 17 inches.

  In each of the above-described embodiments, the multi-function device 1 is configured as a single device. However, the case where the multi-function device 1 is configured by a combination of a plurality of devices, for example, two devices such as a local copying machine and a controller is also included as an example of the present invention. It is. In this case, the modem 20 and the external interface 5 are provided on the controller side, and depending on the configuration, the image memory 13 is provided on the controller side. In other words, a user who uses only the stand-alone local copy function is configured only by the local copying machine, and a user who also uses the scanning function, print function, remote copy function, and FAX function is configured to add a controller to the local copying machine. . The reason for the separate configuration is that when only the local copy function is used, the modem 20 and the external interface 5 are not necessary and the cost is increased. In this case, a case where the local copying machine is further divided into the scanner unit and the image forming unit 11 is also included as an embodiment of the present invention. The reason for the separate configuration is that when only the scanning function is used, the image forming unit 11 is unnecessary and the cost is increased.

  Further, in each of the above embodiments, an example in which a local area network is used has been described. However, as long as the network is connected, for example, a wide area network that connects branches in Japan may be used. In this case, it can be sent directly from the scanner at the A branch to the computer at the B branch or the network copier at the C branch. Further, it may be connected to the network via the Internet.

3 is a flowchart showing a control operation of the network copying machine according to the first embodiment of the present invention. 1 is a block diagram of an image reading apparatus according to the present invention. 1 is an external view of an image reading apparatus according to the present invention. It is a schematic sectional drawing of the scanner part which concerns on this invention. It is an external view of the operation part which concerns on this invention. It is a figure for demonstrating the operation flow at the time of the scan which concerns on this invention. It is a figure for demonstrating the operation flow at the time of the remote copy which concerns on this invention. It is a figure for demonstrating the operation flow at the time of the facsimile transmission which concerns on this invention. It is a figure for demonstrating the operation flow at the time of the local copy which concerns on this invention. It is a figure for demonstrating the difference in the reading capability in the 2nd Embodiment of this invention. 10 is a flowchart showing a control operation of the network copying machine according to the second embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Copier 2 Network 7 Image reading part 8 Reading characteristic correction | amendment part 9 Image processing part 11 Image formation part 13 Image memory 14 Image data 15 CPU
16 ROM
17 Volatile RAM
18 Nonvolatile RAM
20 Modem 21 Public Line 31 Document Feeding Placement 32 Roller 33 Guide 34 Roller 35 Sheet Roller 38 Document Discharge Unit 40 Document Feeding Units 44-47 Document Reversing Unit 51 Scan Setting Start Key 52 Remote Copy Setting Start Key 53 Fax setting start key 55 Liquid crystal display 56 Numeric keys

Claims (10)

A first reading mode for reading an image of a double-sided original document using a first image reading unit and a second image reading unit different from the first image reading unit, and the first image reading unit using only the first image reading unit. Mode setting means capable of setting a second reading mode for reading an image of a double-sided document;
A first state in which the first side of the double-sided document is positioned at the reading position of the first image reading unit and the second side of the double-sided document is positioned at the reading position of the second image reading unit; The second state is such that the second surface of the double-sided document is positioned at the reading position of the first image reading means and the first surface of the double-sided document is positioned at the reading position of the second image reading means. Document feeding means for automatically feeding the double-sided document to each reading position of the first and second image reading means;
When the first reading mode is set by the mode setting unit, the double-sided document is fed by the document feeding unit to the reading positions of the first and second image reading units in the first state. The first and second image reading units are controlled to read the images on the first and second sides of the double-sided document, respectively, and the mode setting unit sets the second reading mode. In this case, the original feeding means feeds the double-sided original in the first state to the reading position of the first image reading means, and sends the first side of the double-sided original to the first image reading means. And reading the double-sided original in the second state to the reading position of the first image reading means so that the first image reading means reads the second side of the double-sided original. Control means to
An image reading apparatus comprising:   Further, a driving unit for moving and scanning the first image reading unit, a document feeding placement unit for placing a document fed by the document feeding unit, and a document placed fixedly And the mode setting means moves the first image reading means relative to the original fixing placement section by the driving means, thereby fixing the original. The image reading apparatus according to claim 1, wherein a third mode in which an image of a document fixedly placed on the placement unit is read by the first image reading unit can be set.   The image reading apparatus according to claim 1, wherein a reading capability of the second image reading unit is lower than a reading capability of the first image reading unit.   The first image reading unit can read the original image as a color image, and the second image reading unit can read the original image only as a monochrome image. Item 4. The image reading apparatus according to Item 3.   The first image reading unit can read the image of the original as a multi-valued image, and the second image reading unit can read the image of the original only as a binary image. The image reading apparatus according to claim 3.   The image reading apparatus according to claim 3, wherein a reading resolution of the second image reading unit is lower than a reading resolution of the first image reading unit.   The image reading apparatus according to claim 3, wherein the readable size of the second image reading unit is smaller than the readable size of the first image reading unit.   4. The image according to claim 3, wherein the readable time of the predetermined size original by the second image reading means is longer than the readable time of the predetermined size original by the first image reading means. Reader.   The mode setting means sets the first reading mode when the black and white reading is specified by the specifying means, and the color setting is set by the specifying means. The image reading apparatus according to claim 1, wherein when the reading is designated, the second reading mode is set. A first surface of the double-sided original is located at a reading position of the first image reading means, and a second surface of the double-sided original is located at a reading position of a second image reading means different from the first image reading means. The second side of the double-sided original is located at the reading position of the first image reading means, and the second side of the double-sided original is located at the reading position of the second image reading means. A method of controlling an image reading apparatus including a document feeding unit that automatically feeds the double-sided document to each reading position of the first and second image reading units so as to satisfy the following condition:
A first reading mode for reading an image on a double-sided original using the first image reading means and the second image reading means, and a first reading mode for reading an image on the double-sided original using only the first image reading means. A mode setting step for setting any one of the two reading modes;
When the first reading mode is set in the mode setting step, the double-sided original is supplied to the reading positions of the first and second image reading means by the original feeding means in the first state. The first and second image reading means are controlled to read the images on the first and second sides of the double-sided document, respectively, and the second reading mode is set in the mode setting step. In this case, the original feeding means feeds the double-sided original to the reading position of the first image reading means in the first state, and sends the first side of the double-sided original to the first image reading means. And reading the double-sided original in the second state to the reading position of the first image reading means so that the first image reading means reads the second side of the double-sided original. Control steps to
An image reading apparatus control method comprising:

Images