JP2005012442A - Image reader, image reading method, and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an image reader capable of dual-side reading in accordance with users' needs. <P>SOLUTION: In an image input/output system 100, a dual-side read mode of a speed priority mode or an image quality priority mode can be set. When the speed priority mode is set, the front side of a document fed from a document feed unit 250 is read by a CCD 218 approximately simultaneously with the reading of the rear side of the document by a CIS 220. When the image quality priority mode is set, the front side of the document fed from the document feed unit 250 is read by the CCD 218, and then the document of which the front side has been read is inverted and fed again and the rear side is read by the CCD 218. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an image reading apparatus, an image reading method, and a program capable of reading both sides of a document.
[0002]
[Prior art]
Conventionally, as a double-sided document reading unit for reading the front and back sides of a double-sided document, there is a unit that scans only the surface of the document once, then reverses the document and feeds it again, and reads the back side. In recent years, there has been proposed a digital copying machine provided with a document conveying device capable of simultaneously reading both sides in order to read a double-sided document at high speed. This is advantageous in terms of performance with respect to double-sided reading as compared to the above-described conventional means.
[0003]
[Patent Document 1]
JP-A-10-42105
[0004]
[Problems to be solved by the invention]
However, in duplex scanning, the front and back sides of the document are scanned by different image scanning means. Further, a CCD image sensor is usually used for reading the front surface, but a contact image sensor (hereinafter referred to as CIS) is often used for reading the back surface because of the installation space and cost.
[0005]
Such a difference in the image reading means causes a difference in the image quality of the read image on the front surface and the back surface. Since there is a need for higher image quality in the double-sided reading of an original document, there is a need for higher image quality, so the difference in image reading means is disadvantageous to the user for higher image quality needs.
[0006]
Furthermore, recent digital copiers have not only a copy function but also a multi-function such as a FAX function (facsimile communication function), a PDL (Post Description Language) print function, a network scan function, and an IFAX function. It has become. As a result, different jobs can frequently be executed simultaneously in the apparatus.
[0007]
In addition, the page memory provided in the apparatus may store not only a scanned image of a copy but also a received image of FAX and IFAX, a developed image of PDL, and the like. Therefore, at the time of simultaneous reading on both sides, it is necessary to secure areas for storing images on the front and back sides of the document in the page memory at the same time. For example, when the page memory is being used by another job, when performing double-sided simultaneous reading, it is necessary to secure the page memory area required for it, but the page memory area required for simultaneous double-sided scanning is ensured. If it cannot, the operation stops at that point. In such a case, the performance is reduced. In order to solve such a problem, the capacity of the page memory may be increased. However, an increase in the capacity of the page memory causes an increase in cost, which is disadvantageous in terms of cost.
[0008]
An object of the present invention is to provide an image reading apparatus, an image reading method, and a program capable of performing double-sided reading according to user needs.
[0009]
[Means for Solving the Problems]
To achieve the above object, the present invention provides a document feeding means for feeding a document, a first reading means for reading a first surface of a document fed by the document feeding means, and the document. A second reading unit for reading a second side of the original fed by the paper feeding unit; and the original after the first side is read by the first reading unit by the first reading unit. Original reversing means for reversing and refeeding the second side, mode setting means for setting any one of a double-sided simultaneous reading mode and a double-sided sequential reading mode, and the double-sided simultaneous reading When the mode is set, reading of the first side of the document fed by the document feeding unit by the first reading unit and reading of the second side of the document by the second reading unit are performed. Almost If the double-sided sequential reading mode is set, the original reversing unit reads the first side of the original fed by the original feeding unit by the first reading unit. And a control unit configured to control the reversal and refeeding of the original on which the first side has been read and to read the second side of the refeeded original by the first reading unit. .
[0010]
In order to achieve the above object, the present invention provides a document feeding means for feeding a document, a first reading means for reading a first surface of a document fed by the document feeding means, A second reading unit for reading a second surface of the document fed by the document feeding unit, and a document after the first surface is read by the first reading unit by the first reading unit. An image reading method of an image processing apparatus comprising a document reversing unit that reverses and re-feeds the second side of the document so as to be read, and is one of a duplex scanning mode and a duplex sequential scanning mode. When the mode setting step for setting the mode and the double-sided simultaneous reading mode are set, the first reading unit reads the first side of the document fed by the document feeding unit and the second reading unit. reading When the double-sided simultaneous reading step for substantially simultaneously reading the second side of the original by the stage and the double-sided sequential reading mode are set, the original is fed by the original feeding means by the first reading means After reading the first surface of the document, the document whose first surface is read by the document reversing unit is reversed and re-fed, and the second surface of the re-fed document is read by the first reading unit. And a double-sided reading process.
[0011]
In order to achieve the above object, the present invention provides a document feeding means for feeding a document, a first reading means for reading a first surface of a document fed by the document feeding means, A second reading unit for reading a second surface of the document fed by the document feeding unit, and a document after the first surface is read by the first reading unit by the first reading unit. A program for controlling image reading in an image processing apparatus that includes a document reversing unit that reverses and re-feeds the second side of the document, and includes a duplex scanning mode and a duplex sequential scanning mode. A mode setting module for setting any of the modes, and a document fed by the document feeding unit by the first reading unit when the double-sided simultaneous reading mode is set When the double-sided simultaneous reading module for substantially simultaneously reading the first side and reading the second side of the document by the second reading unit and the double-sided sequential reading mode are set, the first reading unit After reading the first surface of the document fed by the document feeding means, the document whose first surface is read by the document reversing means is reversed and re-fed, and the first reading means re-feeds the document. And a double-sided reading module for reading the second side of the fed document.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0013]
(First embodiment)
FIG. 1 is a block diagram showing the overall configuration of an image input / output system according to the first embodiment of the present invention.
[0014]
As shown in FIG. 1, the image input / output system 100 includes a reader unit (image input device) 200, a printer unit 300, and a control device 110. The reader unit 200 optically reads a document image and converts it into image data. The reader unit 200 includes a scanner unit 210 for reading a document and a document feeding unit (DF unit) 250 for conveying the document.
[0015]
A printer unit (image output apparatus) 300 conveys a recording sheet, prints image data as a visible image on the recording sheet, and discharges the recording sheet outside the apparatus. The printer unit 300 includes a paper feed unit 310 having a plurality of types of recording paper cassettes, a marking unit 320 for transferring and fixing image data onto the recording paper, and a paper for discharging the printed recording paper to the outside. A paper discharge unit 330 and a finisher unit 500 that performs stapling and sorting are included.
[0016]
The control device 110 is electrically connected to the reader unit 200 and the printer unit 300, and is connected to host computers (PCs) 401 and 402 via a network (hereinafter referred to as a LAN (Local Area Network)) 400. Yes. The control device 110 has a built-in modem (not shown) connected to the FAX line 128. The control device 110 provides a copy function by controlling the reader unit 200 and the printer unit 300. This copy function is for reading a document by the reader unit 200 and outputting image data obtained by reading the document by the printer unit 300 to a recording sheet. Further, the control device 110 converts the image data obtained from the reader unit 200 into code data and transmits it to the host computers 401 and 402 via the LAN 400, and receives it from the host computers 401 and 402 via the LAN 400. A printer function for converting code data into image data and outputting the image data to the printer unit 300 is provided.
[0017]
Further, an operation unit 150 is connected to the control device 110. The operation unit 150 includes a liquid crystal touch panel, for example, and provides a user I / F (interface) for operating the image input / output system 100.
[0018]
Next, the internal configuration of the reader unit 200 and the printer unit 300 will be described with reference to FIG. FIG. 2 is a longitudinal sectional view schematically showing the internal configuration of the reader unit 200 and the printer unit 300 of FIG.
[0019]
The document feeding unit 250 of the reader unit 200 feeds the documents one by one to the platen glass 211 in order from the top, and discharges the documents on the platen glass 211 to the discharge tray 219 after the document reading operation is completed. . When the document is conveyed onto the platen glass 211, the lamp 212 is turned on. Then, the original surface is exposed and scanned by the optical unit 213. Here, there are two forms: fixed reading for reading an original while the original is stopped on the platen glass 211 and flow reading for reading the original while conveying the original along the platen glass 211. In the case of fixed reading, exposure scanning of the document surface is performed by moving the optical unit 213 in the sub-scanning direction. On the other hand, in the case of flow reading, exposure scanning of the document surface is performed with the optical unit 213 held at a predetermined position. In either case, the reflected light from the document is guided to a CCD image sensor (hereinafter referred to as CCD) 218 by a reduction optical system including mirrors 214, 215, 216 and a lens 217. Thus, the scanned image on the original is reduced and read by the CCD 218. Image data output from the CCD 218 is transferred to the control device 110 after being subjected to predetermined processing.
[0020]
The document feeding unit 250 has a contact image sensor (hereinafter referred to as CIS) 220 for reading the back side of the document at an equal magnification, and thus the image on the back side of the document is read in the same manner as reading of the image on the front side of the document by the CCD 218. Can be read. Further, the document feeding unit 250 includes a DF sensor 221 that detects a document position and a DF driving unit 222 that transports the document. With these, the document can be transported and an image can be read. Further, the DF driving unit 222 can invert and re-feed the original after the front side is read by the CCD 218, whereby the re-fed original is fed with the back side as the reading side. Will be. In FIG. 2, the reversing mechanism in the DF driving unit 222 is a known mechanism, and details thereof are omitted.
[0021]
The printer unit 300 includes a laser driver 321 that drives a laser light emitting unit 322, and the laser driver 321 drives the laser light emitting unit 322 so as to emit laser light according to image data output from the control device 110. . The laser light emitted from the laser light emitting unit 322 is applied to the photosensitive drum 323, and a latent image corresponding to the laser light is formed on the photosensitive drum 323. The latent image formed on the photosensitive drum 323 is visualized as a developer image by the developer supplied from the developing device 324.
[0022]
The recording paper is fed from one of the cassettes 311, 312, 313, and 314 or the manual paper feed stage 315 to the transfer unit 325 along the transport path 331 at a timing synchronized with the start of laser light irradiation. The developer image on the photosensitive drum 323 is transferred to the fed recording paper by the unit 325. The recording paper on which the developer image is transferred is conveyed to the fixing unit 327 by the conveying belt 326, and heat and pressure are applied in the fixing unit 327. Thereby, the developer on the recording paper is fixed on the image recording paper. Thereafter, the recording paper that has passed through the fixing unit 327 is discharged to the conveyance path 334 through the conveyance path 335.
[0023]
When the print surface is reversed and discharged, the recording paper is guided to the transport path 338 through the transport path 336, where the recording paper is transported in the reverse direction, and discharged to the transport path 334 through the transport path 337.
[0024]
When double-sided recording is set, the recording paper that has passed through the fixing unit 327 is guided from the conveyance path 336 to the conveyance path 333 by the flapper 329. Thereafter, the recording paper is conveyed in the reverse direction, and is guided by the flapper 329 to the refeed conveyance path 332 through the conveyance path 338. The recording sheet guided to the refeed conveyance path 332 is fed to the transfer unit 325 through the conveyance path 331 at the timing described above.
[0025]
The recording paper discharged from the conveyance path 334 of the printer unit 300 is conveyed to the finisher unit 500. In the finisher unit 500, the recording paper from the printer unit 300 is first sent to the buffer unit 501. Here, the recording paper conveyed according to circumstances is wound around a buffer roller for buffering. For example, when processing such as stapling that takes place downstream takes time, by using this buffer unit 501, the conveyance speed of the recording paper conveyed from the main body can be kept constant, thereby improving the throughput. It can be useful.
[0026]
The recording paper that has passed through the buffer unit 501 is discharged to the stack tray 507a by the upstream discharge roller pair 502 and the downstream discharge roller pair 503.
[0027]
In the staple mode, the paper is transported by the upstream discharge roller pair 502, and immediately after the trailing edge of the recording paper passes through this, it is pulled back by the knurled belt 504 and discharged to the staple tray 505. Then, after a predetermined number of recording sheets are stacked, the recording sheet bundle is bound by a stapling process by the staple unit 506, and the bound recording sheet bundle is discharged to the discharge tray 507a by the downstream discharge roller pair 503. Is done.
[0028]
In this example, in addition to the discharge tray 507a, a discharge tray 507b is provided, and these discharge trays 507a and 507b can be moved up and down in conjunction with a drive unit (not shown). It is. In FIG. 2, the discharge tray 507a is in a position for receiving the discharged recording paper. However, it is also possible to move this upward to discharge the recording paper to the discharge tray 507b.
[0029]
Next, the operation unit 150 will be described with reference to FIG. FIG. 3 is a plan view showing the configuration of the operation unit 150 of FIG.
[0030]
As shown in FIG. 3, the operation unit 150 includes an LCD touch panel 600 for performing main mode setting and status display, various keys 601 to 608 and 610 to 615, a soft power switch 609, and various LEDs 616 to 618. Have
[0031]
A key 601 is a numeric keypad for inputting a numerical value from 0 to 9. A key 602 is an ID key, and is used when inputting a department number and a reef mode when the apparatus is under department management. A key 603 is a reset key for resetting a set mode, a key 604 is a guide key for displaying an explanation screen for each mode, a key 605 is a user mode key for entering a user mode screen, and a key 606 Is an interrupt key for performing an interrupt copy.
[0032]
A key 607 is a start key for starting the copy operation, and a key 608 is a stop key for stopping the copy job being executed.
[0033]
The soft power switch 609 is a switch for setting the device in a low power state. When this switch is pressed, the backlight of the LCD 600 is turned off, and the device falls into a low power state. A key 610 is a power saving key. When the key 610 is pressed, the apparatus shifts to a power saving state. When the key 610 is pressed again, the apparatus returns from the power saving state.
[0034]
Reference numerals 611, 612, and 613 denote function keys for shifting to copy, box, and extended functions. FIG. 3 shows a state in which a standard screen for copying is displayed. When the other function keys 612 and 613 are pressed, the standard screen for each function is displayed.
[0035]
A key 614 is an adjustment key for adjusting the contrast of the LCD touch panel 600. A key 615 is a counter confirmation key. When this key is pressed, a count screen for displaying the total number of copies used so far is displayed on the LCD.
[0036]
An LED 616 is an LED indicating that the job is being executed and an image is being stored in the image memory, and an LED 617 is an error LED indicating that the apparatus is in an error state such as a jam or a door open. An LED 618 is a power LED indicating that the main switch of the apparatus is ON.
[0037]
Next, the configuration of the control device 110 will be described with reference to FIGS. 4 and 5. 4 is a block diagram showing the configuration of the control device 110 in FIG. 1, and FIG. 5 is a diagram showing an example of a memory map of a page memory storage area provided in the RAM 121 in FIG.
[0038]
As shown in FIG. 4, the control device 110 includes a CPU 120 that is a controller that controls the entire system. The CPU 120 includes a RAM 121, a ROM 123, an HDD (hard disk drive) 124, and an operation unit I via a system bus 138. / F122, network I / F126, modem I / F127, temperature detector 129, DMAC132, and image bus I / F130 are connected.
A RAM 121 is a memory used for system control, a program area for reading and storing system software stored in the HDD 124, a work area for use as a work memory for the CPU 120, and a buffer for storing data in the HDD 124. It is divided into page memory storage areas that are mainly used.
[0039]
As shown in FIG. 5, the page memory storage area expands the image once before the image read from the scanner unit 210, the received image from FAX, the received image of PDL, etc. are compressed and stored in the HDD 124, and thereafter It includes a read page memory reserved for compressing and storing in the HD, and a print page memory mainly used for decompressing an image in the HDD 124 and then expanding and printing out the image. In the present embodiment, an area capable of storing two images as a read page memory and three images as a print page memory is prepared.
[0040]
The ROM 123 is a boot ROM and stores a system boot program. The HDD 124 stores system software, compressed image data, and the like.
[0041]
The operation unit I / F 122 is an interface with the operation unit 150, and outputs image data to be displayed on the operation unit 150 to the operation unit 150. The operation unit I / F 122 plays a role of transmitting information input by the system user from the operation unit 150 to the CPU 120.
[0042]
A network I / F 125 is connected to the LAN 400 and inputs and outputs information. The modem 127 is connected to the FAX line 128 and inputs / outputs FAX information. The DMAC 132 is a direct memory access controller, and controls data transfer in the RAM 121 and data exchange between the RAM 121 and the HDD 124.
[0043]
The image bus I / F 130 is a bus bridge that connects the system bus 138 and an image bus 131 that transfers images at high speed and converts the data structure.
[0044]
The image bus 131 is configured by a PCI bus or IEEE1394. On the image bus 131, a RIP (raster image processor) 133, a device I / F 134, a scanner image processing unit 135, a printer image processing unit 136, and an image compression unit 137 are connected.
[0045]
The RIP 133 expands the PDL code into a bitmap image. The device I / F unit 134 transmits and receives image data and control data between the control unit 110 and the reader unit 200 and the printer unit 300 that are image input / output devices. The scanner image processing unit 135 corrects, processes, and edits input image data. The printer image processing unit 136 performs image correction, rotation, resolution conversion, and the like on the print output data. The image compression unit 137 performs compression / decompression processing such as JBIG, MMR, and MH.
[0046]
Next, the reader control device 400 that controls the reader unit 200 will be described with reference to FIG. FIG. 6 is a block diagram illustrating a configuration of a reader control device 400 that controls the reader unit 200 of FIG.
[0047]
The reader control device that controls the reader unit 200 includes a reader CPU 407 as shown in FIG. The reader CPU 407 communicates with the CPU 120 of the control device 110, and there is a relationship in which the reader CPU 407 is a slave and the CPU 120 is a master.
[0048]
The reader CPU 407 is connected to two image processing units 401 and 402, two FIFOs 403 and 404, a multiplexer (hereinafter referred to as MUX) 405, a CCD 218, a CIS 220, a DF sensor unit 221, and a DF driving unit 222 via a system bus 406. Is connected. The image processing unit 401 performs image processing such as shading of the image signal from the CCD 128 and gamma correction. Similarly, the image processing unit 402 performs processing of the image signal from the CIS 220. The FIFO 403 once accumulates the output signal from the image processing unit 401, and the accumulated signal is read at a predetermined timing. Similarly, the FIFO 404 accumulates the output signal from the image processing unit 402 once, and the accumulated signal is read at a predetermined timing. The MUX 405 alternately captures images stored in the FIFO 403 and the FIFO 404 and transmits them to the control device 110 serially.
[0049]
Next, double-sided original simultaneous reading executed by the image input / output system will be described with reference to FIGS. 7 is a timing chart until the image signals output from the CCD 128 and the CIS 220 are output from the image processing unit 401 and the image processing unit 402, respectively. FIG. 8 is a diagram illustrating the order of the image signals output from the MUX 405.
[0050]
When a document is transported from the document feeder unit 250 in a state where duplex scanning is designated, the front surface of the document is read by the CCD 128 and the back surface of the document is read by the CIS 220 almost simultaneously. That is, as shown in FIG. 7, first, the front surface of the first document is read by the CCD 128 and the back surface thereof is read by the CIS 220, and then the front and back surfaces of the second document are similarly read. As a result, image signals for the respective document surfaces are sequentially output from the CCD 218, processed by the image processing unit 401, and stored in the FIFO 403. On the other hand, the image signals from the CIS 220 for the back side of each document are output slightly delayed from the image signals from the CCD 218, processed by the image processing unit 402, and stored in the FIFO 404.
[0051]
The processing for the image signals so far is parallel processing. When the image signals on the front and back sides of the document are sent to the control device 110 in this parallel processing state, the images for two surfaces are simultaneously processed in the control device 110. Therefore, it is necessary to provide the device I / F 134, the scanner image processing unit 135, the image bus I / F 130, the RAM 121 including the page memory, the HDD 124, etc. in duplicate, resulting in an increase in cost. .
[0052]
Therefore, in order to eliminate the above cost increase, in this embodiment, a MUX 405 is provided. That is, with respect to the image signals stored in the FIFOs 403 and 404, first, the image signal from the FIFO 403 to the first original surface, the image signal from the FIFO 404 to the first original surface, and so on. The image signal for the front surface and the image signal for the back surface are alternately read from the FIFOs 403 and 404 and taken into the MUX 405. As shown in FIG. 8, from the MUX 405, an image signal on the first document surface, an image signal on the first document back surface, an image signal on the second document surface, and a second document back surface image are displayed. Image signals for the front and back surfaces of each document are sequentially transmitted to the control device 110 in the order of image signals. As a result, the control device 110 does not perform parallel processing on the signals on the front side and the back side of the document, but performs a process similar to a general double-sided reading process that inverts the document and reads the back side. Enable simultaneous reading.
[0053]
Next, system control performed by the CPU 120 and the reader CPU 407 will be described in detail with reference to FIGS. 9 is a diagram showing an example of a standard copy screen displayed on the LCD touch panel 600, FIG. 10 is a diagram showing an example of a double-sided setting screen, and FIG. 11 is a double-sided setting or double-sided setting on the double-sided setting screen of FIG. FIG. 12 is a diagram showing a can mode setting screen, FIG. 13 is a flowchart showing a processing procedure of a copy task, and FIGS. 14 and 15 are diagrams showing a copy standard screen when a mode for designating double-sided printing is set. 13 is a flowchart showing a processing procedure of 13 read tasks.
[0054]
On the LCD touch panel 600, a standard copy screen as shown in FIG. 9 is displayed. On this standard screen, a duplex setting key 901 for performing duplex setting is displayed, and when the duplex setting key 901 is pressed, the screen changes to a duplex setting screen shown in FIG.
[0055]
In this double-sided setting screen, a single-sided setting key 902 for setting original single-sided reading and double-sided printing, a double-sided setting key 903 for setting original double-sided reading and double-sided printing, and a double-sided setting key for setting original double-sided reading and single-sided printing In step 904, a continuous page duplex setting key 905 for reading the right page and the left page of the book original, that is, duplex printing is displayed. Further, a cancel key 906 for canceling the duplex setting, a return key 907 for returning to the original screen, and an OK key 908 for returning to the original screen after enabling the set mode are displayed. Here, when any one of the keys 906 to 908 is pressed, the screen returns to the copy standard screen of FIG. Further, these keys 906 to 908 are also illustrated in the drawings described later, but their functions are the same, and hence the description thereof will be omitted. Further, a key 909 is displayed. This key 909 is a detail setting key for setting details of duplex setting such as whether to perform duplex printing assuming left-right opening or duplex printing assuming vertical opening. Since the setting contents by the key 909 are not particularly related to the present invention, the description thereof is omitted.
[0056]
When a mode for specifying double-sided printing such as double-sided setting or double-sided setting is set on the double-sided setting screen, the screen returns to the standard copy screen. In this standard copy screen, as shown in FIG. A scan mode key 910 is displayed. When the scan mode key 910 is pressed, the screen changes to a scan mode setting screen shown in FIG.
[0057]
On this scan mode setting screen, an image quality priority mode setting key 911 and a speed priority setting key 912 are displayed. Here, the image quality priority mode setting key 911 is a key for causing the CCD 218 to read both the front surface and the back surface of the document in order to prioritize the image quality. A speed priority setting key 912 is a key for simultaneously reading the front side of the document with the CCD 218 and the back side with the CIS 220 in order to give priority to the speed.
[0058]
After the above setting is performed, when a document is set in the document feeding unit 250 and the start key 607 is pressed, a copy task is activated. This copy task will be described with reference to FIG. The procedure shown in FIG. 13 is executed by the CPU 120 and the reader CPU 407.
[0059]
When the copy task is activated, as shown in FIG. 13, first, in step S1301, the reading task is activated, and in the subsequent step S1302, the print task is activated. In step S1303, all the originals are read and all the pages are printed, and when all the processes are completed, the copy task ends.
[0060]
Next, details of the reading task in step S1301 will be described with reference to FIGS. Here, the description will be made on the assumption that the duplex reading is basically set, and the description of the normal single-sided reading will be omitted to avoid complication.
[0061]
In the reading task, as shown in FIG. 14, it is first determined in step S1401 whether or not the speed priority mode is set. If the speed priority mode is set, in step S1402, the operation of the document feeding unit 250 and various settings in the reader control device 400 are set so as to correspond to the double-sided simultaneous reading mode. Subsequently, in step S1403, parameter setting for the image processing unit 401 is performed, and in step S1404, parameter setting for the image processing unit 402 is similarly performed.
[0062]
In step S1405, the reading page memory for one page is secured, and in step S1406, the reading page memory for another page is secured. That is, at the time of double-sided simultaneous reading, each image on the front side and the back side is read at the same time by one document scan, so that reading page memory for two sides is secured.
[0063]
Next, in step S 1407, feeding of a document from the document feeding unit 250 is started. This document is conveyed by the DF drive unit 222, and when the leading end reaches the DF sensor unit 221, a detection signal is output from the DF sensor unit 221. In step S1408, upon receiving a detection signal from the DF sensor unit 221, an image reading operation is performed. Here, the image signals are simultaneously read from the CCD 218 and the CIS 220. However, since the MUX 405 is initially set to the front side, that is, the FIFO 403 side, the image of the FIFO 403 is first read to the reading page memory and further compressed. And stored in the HDD 124.
[0064]
In step S1409, the MUX 405 switches to the back side, that is, the FIFO 404. In the subsequent step S1410, the back side image is read from the FIFO 404 and processed in the same manner as the front side image. In step S1411, the MUX 405 switches to the front side, that is, the FIFO 403 again.
[0065]
Next, in step S1412, the read page memory for which image compression and accumulation in the HDD 124 has been completed is released, and in subsequent step S1413, it is determined again whether or not the speed priority mode is set. Here, since the speed priority mode is set, the document discharge operation is performed in step S1414. In step S1415, it is determined whether or not there is a next original. If there is a next original, the process returns to step S401 and the next original is read. On the other hand, if there is no next original, this process ends.
[0066]
If it is determined in step S1401 that the speed priority mode is not set, that is, the image quality priority mode is set, in step S1416 shown in FIG. Each setting is set to be a duplex sequential reading mode by reversing the document. In step S1417, only parameter setting for the image processing unit 401 is performed. In step S1418, one page of read page memory is secured. In the image quality priority mode, after reading the front side of the original, the original is reversed and the back side of the original is read. Unlike the speed priority mode, it is only necessary to secure one page of read page memory.
[0067]
In step S1419, feeding of the first document on the document feeding unit 250 is started. When this document is conveyed by the DF drive unit 222 and the leading end reaches the DF sensor unit 221, a detection signal is output from the DF sensor unit 221. In step S1420, when a detection signal is received from the DF sensor unit 221, an image reading operation is performed. In the image quality priority mode, an image signal is output only from the CCD 218, and this image signal is read into the reading page memory, further compressed, and stored in the HDD 124.
[0068]
Next, in step S1412, the read page memory for which image compression and accumulation in the HDD 124 has been completed is released, and in subsequent step S1413, it is determined again whether or not the speed priority mode is set. Here, since the image quality priority mode is set, it is determined in step S1421 whether or not the currently read image is an image on the surface of the document. Here, when the image read now is an image on the front side of the document, in order to read the back side of the document, the document is reversed in step S1422. In step S1415, it is determined whether there is a next original. Here, since there is an inverted original as the next original, the process returns to step S401, and the inverted original, that is, the back side of the original is read.
[0069]
If it is determined that the image read in step S1421 is not an image on the front side of the document, that is, an image on the back side of the document, reading of the front and back sides of the document has been completed. In step S1414, the document is ejected. Is called. In step S1415, it is determined whether or not there is a next original. If there is a next original, the process returns to step S401 and the next original is read. On the other hand, if there is no next original, this process ends.
[0070]
As described above, in the present embodiment, in the image input / output system 100 including the document feeding unit 250 capable of reading both sides simultaneously, the user selects either the mode giving priority to image quality or the mode giving priority to speed when reading both sides. Therefore, it is possible to perform double-sided reading according to user needs.
[0071]
(Second Embodiment)
Next, a second embodiment of the present invention will be described with reference to FIGS. 16 and 18 are flowcharts showing the processing procedure of the reading task of the image input / output system according to the second embodiment of the present invention, and FIG. 19 is the scan mode setting screen of the image input / output system according to the second embodiment of the present invention. FIG. The configuration of the present embodiment is the same as the configuration of the first embodiment, and a description of the configuration is omitted. In the present embodiment, description will be made using the same reference numerals as those in the first embodiment.
[0072]
In the first embodiment, in the speed priority mode, that is, the mode in which both sides are read simultaneously, it is necessary to secure reading page memories for two sides at the same time, but the apparatus state is always read page memory for two sides. It is not always in a state where it is possible to secure the two simultaneously. Therefore, in the present embodiment, there is provided means for minimizing performance degradation when reading page memory for two pages cannot be secured.
[0073]
In the reading task of this embodiment, as shown in FIG. 16, first, in step S1501, it is determined whether or not the speed priority mode is set. If the speed priority mode is set, in step S1502, the operation of the document feeding unit 250 and each setting in the reader control device 400 are set so as to correspond to the double-sided simultaneous reading mode. Subsequently, in step S1503, parameter setting for the image processing unit 401 is performed, and in step S1504, parameter setting for the image processing unit 402 is similarly performed.
[0074]
Next, in step S1505, one page of read page memory is secured, and in step S1506, another page of read page memory is secured. That is, when reading both sides simultaneously, it is necessary to secure reading page memory for two sides. In step S1507, it is determined whether the reading page memory for two pages has been successfully secured.
[0075]
If it is determined in step S1507 that the reading page memory for two pages has been secured, feeding of the document from the document feeding unit 250 is started in step S1508. This document is conveyed by the DF drive unit 222, and when the leading end reaches the DF sensor unit 221, a detection signal is output from the DF sensor unit 221. In step S1509, when a detection signal is received from the DF sensor unit 221, an image reading operation is performed. Here, the image signals are simultaneously read from the CCD 218 and the CIS 220. However, since the MUX 405 is initially set to the front side, that is, the FIFO 403 side, the image of the FIFO 403 is first read to the reading page memory and further compressed. And stored in the HDD 124.
[0076]
In step S1510, the MUX 405 switches to the back side, that is, the FIFO 404. In the subsequent step S1511, the back side image is read from the FIFO 404 and processed in the same manner as the front side image. In step S1512, the MUX 405 switches to the front side, that is, the FIFO 403 again.
[0077]
Next, in step S1513 shown in FIG. 17, the read page memory for which image compression and accumulation in the HDD 124 has been completed is released, and in the subsequent step S1514, it is determined again whether or not the speed priority mode is set. Here, since the speed priority mode is set, the document discharge operation is performed in step S1515. In step S1516, it is determined whether or not there is a next original. If there is a next original, the process returns to step S1501 to read the next original. On the other hand, if there is no next original, this process ends.
[0078]
When it is determined in step S1501 that the speed priority mode is not set, that is, the image quality priority mode is set, in step S1517 shown in FIG. Each setting is set to be a duplex sequential reading mode by reversing the document. In step S1518, only parameter setting for the image processing unit 401 is performed. In step S1519, one page of read page memory is secured. In the image quality priority mode, after reading the front side of the original, the original is reversed and the back side of the original is read. Unlike the speed priority mode, it is only necessary to secure one page of read page memory.
[0079]
In step S1520, the feeding of the document on the document feeding unit 250 is started. When this document is conveyed by the DF drive unit 222 and the leading end reaches the DF sensor unit 221, a detection signal is output from the DF sensor unit 221. In step S1521, an image reading operation is performed by receiving a detection signal from the DF sensor unit 221. In the image quality priority mode, an image signal is output only from the CCD 218, and this image signal is read into the reading page memory, further compressed, and stored in the HDD 124.
[0080]
Next, in step S1513 shown in FIG. 17, the read page memory for which image compression and accumulation in the HDD 124 has been completed is released, and in the subsequent step S1514, it is determined again whether or not the speed priority mode is set. Here, since the image quality priority mode is set, it is determined in step S1522 whether or not the currently read image is an image on the surface of the document. Here, when the currently read image is an image on the front side of the document, in order to read the back side of the document, a document reversing operation is performed in step S1523. In step S1516, it is determined whether there is a next original. Here, since there is an inverted original as the next original, the process returns to step S1501 to read the inverted original, that is, the back side of the original.
[0081]
If it is determined that the image read in step S1522 is not an image on the front side of the document, that is, an image on the back side of the document, whether mode switching (switching from the speed priority mode to the image quality priority mode) has been performed in step S1524. A determination is made whether or not. Here, since the mode has not been switched and the reading of the front and back sides of the document has been completed, a document discharge operation is performed in step S1526. In step S1516, it is determined whether or not there is a next original. If there is a next original, the process returns to step S401 and the next original is read. On the other hand, if there is no next original, this process ends.
[0082]
If the speed priority mode is set and it is determined in step S1507 that the reading page memory for two pages has not been secured, the scan mode is changed from the speed priority mode to the image quality in step S1527 shown in FIG. Switch to priority mode temporarily. Then, in order to support the image quality priority mode, only parameter setting for the image processing unit 401 is performed in step S1518, and reading page memory for one page is secured in the subsequent step S1519. This is because, in the image quality priority mode, it is only necessary to secure one page of read page memory.
[0083]
In step S1520, feeding of the first document on the document feeding unit 250 is started. When this document is conveyed by the DF drive unit 222 and the leading end reaches the DF sensor unit 221, a detection signal is output from the DF sensor unit 221. In step S1521, an image reading operation is performed by receiving a detection signal from the DF sensor unit 221. In the image quality priority mode, an image signal is output only from the CCD 218, and this image signal is read into the reading page memory, further compressed, and stored in the HDD 124.
[0084]
Next, in step S1513 shown in FIG. 17, the read page memory for which image compression and accumulation in the HDD 124 has been completed is released, and in the subsequent step S1514, it is determined again whether or not the speed priority mode is set. Here, since the speed priority mode is switched to the image quality priority mode, it is determined in step S1522 whether or not the currently read image is an image on the surface of the document. Here, when the currently read image is an image on the front side of the document, in order to read the back side of the document, a document reversing operation is performed in step S1523. In step S1516, it is determined whether there is a next original. Here, since there is an inverted original as the next original, the process returns to step S1501 to read the inverted original, that is, the back side of the original.
[0085]
If it is determined that the image read in step S1522 is not an image on the front side of the document, that is, an image on the back side of the document, whether mode switching (switching from the speed priority mode to the image quality priority mode) has been performed in step S1524. A determination is made whether or not. Here, since the mode has been switched and the reading of the front and back sides of the document has been completed, the setting is returned in step S1525. That is, the scan mode is returned from the image quality priority mode to the speed priority mode. In step S1526, a document discharge operation is performed.
[0086]
Next, in step S1516, it is determined whether or not there is a next original. If there is a next original, the process returns to step S1501 to read the next original in the speed priority mode. On the other hand, if there is no next original, this process ends.
[0087]
As described above, in the present embodiment, when the speed priority mode is set, even when the reading page memory for two pages cannot be secured, the image quality priority mode is sufficient in which only the page memory for one scan is sufficient. By switching, it is possible to prevent the scan from being stopped, and after the next scan, it is possible to return to the speed priority mode again and try a faster scan. As a result, user convenience is further improved.
[0088]
In the case of the above processing, when the speed priority mode is set and the reading page memory for two pages cannot be secured, the speed priority mode is automatically switched to the image quality priority mode. However, whether to allow switching from the speed priority mode to the image quality priority mode may be set in advance. For example, as shown in FIG. 19, an automatic switching setting key 913 is provided on the scan mode setting screen, and whether or not switching from the speed priority mode to the image quality priority mode is permitted by pressing the automatic switching setting key 913 is determined. Can be set. By pressing the automatic switch setting key 911, when switching from the speed priority mode to the image quality priority mode is permitted, or when the speed priority mode is set, the reading page memory for two pages can be secured. If not, switching from the speed priority mode to the image quality priority mode is automatically performed. On the other hand, when switching from the speed priority mode to the image quality priority mode is not permitted, or when the speed priority mode is set, even if the reading page memory for two pages cannot be secured, speed priority Switching from the mode to the image quality priority mode is not performed. That is, when the speed priority mode is set, when the reading page memory for two pages cannot be secured, the processing is stopped.
[0089]
In each of the above-described embodiments, the image input / output system 100 including the document feeding unit 250 has been described. However, the principle of the present invention is not limited to this, and all apparatuses including a scanner capable of reading both sides simultaneously. Needless to say, the present invention can also be applied to, for example, FAX scanning, I-FAX scanning, and network scanning.
[0090]
Further, the reading means for performing double-side reading may be a monochrome sensor or a color sensor.
[0091]
It is to be noted that the object of the present invention is to supply a storage medium (or recording medium) in which software program codes for realizing the functions of the above-described embodiments are recorded to a system or apparatus, and to provide a computer (or computer) of the system or apparatus. Needless to say, this can also be achieved by the CPU and MPU) reading and executing the program code stored in the storage medium. In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiments, and the storage medium storing the program code constitutes the present invention. Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an operating system (OS) running on the computer based on the instruction of the program code. It goes without saying that a case where the function of the above-described embodiment is realized by performing part or all of the actual processing and the processing is included.
[0092]
Furthermore, after the program code read from the storage medium is written into a memory provided in a function expansion card inserted into the computer or a function expansion unit connected to the computer, the function is determined based on the instruction of the program code. It goes without saying that the CPU or the like provided in the expansion card or the function expansion unit performs part or all of the actual processing and the functions of the above-described embodiments are realized by the processing.
[0093]
The embodiments of the present invention are listed below.
[0094]
[Embodiment 1] Document feeding means for feeding a document, first reading means for reading a first surface of a document fed by the document feeding means, and feeding by the document feeding means A second reading unit for reading the second surface of the original document, and reading the second surface of the original document by the first reading unit after reading the first surface by the first reading unit. An image processing apparatus including a document reversing unit that reverses and re-feeds the document so as to be capable of being set, and a mode setting unit that sets one of a duplex scanning mode and a duplex scanning mode. Mode executing means for executing the mode, and when the double-sided simultaneous reading mode is set, the mode executing means of the original fed by the original feeding means by the first reading means When the reading of the first side and the reading of the second side of the document by the second reading unit are performed almost simultaneously, and the duplex reading mode is set, the document feeding unit by the first reading unit After reading the first side of the document fed in step 1, the document whose first side is read by the document reversing unit is reversed and re-fed, and the document fed again by the first reading unit is read. An image processing apparatus that reads a second surface.
[0095]
[Embodiment 2] The image processing apparatus according to Embodiment 1, wherein the first reading unit is of a type different from that of the second reading unit.
[0096]
[Embodiment 3] The image processing apparatus according to Embodiment 2, wherein the first reading means is a CCD image sensor.
[0097]
[Embodiment 4] The image processing apparatus according to Embodiment 2 or 3, wherein the second reading unit is a contact image sensor.
[0098]
[Embodiment 5] The image processing apparatus according to Embodiment 1, wherein the double-sided simultaneous reading mode is a speed priority reading mode.
[0099]
[Embodiment 6] The image processing apparatus according to Embodiment 1 or 5, wherein the double-sided reading mode is an image quality priority reading mode.
[0100]
[Embodiment 7] Document feeding means for feeding a document, first reading means for reading at least a first surface of a document fed by the document feeding means, and feeding by the document feeding means A second reading unit that reads the second side of the original and the first side after the first side is read by the first reading unit so that the second side of the original can be read by the first reading unit. The image processing apparatus includes a document reversing unit that reverses and re-feeds, and a storage unit that secures an image storage area, and sets either a duplex scanning mode or a duplex scanning mode. A mode setting unit; and a mode execution unit for securing an image storage area necessary for executing the set mode in the storage unit and executing the set mode. When the reading mode is set, after reading the first side of the document fed by the document feeding unit by the first reading unit, the document whose first side is read by the document reversing unit is reversed. When the double-sided simultaneous reading mode is set when the second side of the original is read again and read by the first reading unit and the second side of the original is read, the image required for executing the double-sided simultaneous reading mode is set. When the storage area can be secured in the storage unit, the first reading unit reads the first side of the document fed by the document feeding unit and the second reading unit reads the document. When the second surface is read almost simultaneously and the image storage area necessary for executing the double-sided simultaneous reading mode cannot be secured in the storage means, the double-sided simultaneous reading is performed. The image processing apparatus characterized by switching the mode to the double-sided reading mode.
[0101]
[Embodiment 8] The image processing apparatus according to Embodiment 7, wherein the first reading unit is of a type different from that of the second reading unit.
[0102]
[Embodiment 9] The image processing apparatus according to Embodiment 8, wherein the first reading means is a CCD image sensor.
[0103]
[Embodiment 10] The image processing apparatus according to Embodiment 8 or 9, wherein the second reading unit is a contact image sensor.
[0104]
[Embodiment 11] The image processing apparatus according to Embodiment 7, wherein the double-sided simultaneous reading mode is a speed priority reading mode.
[0105]
[Embodiment 12] The image processing apparatus according to Embodiment 7 or 11, wherein the double-sided reading mode is an image quality priority reading mode.
[0106]
[Embodiment 13] The image processing apparatus according to Embodiment 1, wherein the storage means is a RAM.
[0107]
[Embodiment 14] The mode execution means secures, in the storage means, an image storage area for two sides necessary for one original reading operation as an image storage area necessary for executing the double-sided simultaneous reading mode. The image processing device according to claim 7, wherein
[0108]
[Embodiment 15] Whether to permit switching from the double-sided simultaneous reading mode to the double-sided reading mode when the image storage area necessary for the execution of the double-sided simultaneous reading mode by the mode execution unit cannot be secured. The image processing apparatus according to claim 7, further comprising a switching permission setting unit that is set in advance.
[0109]
[Embodiment 16] The mode execution means determines whether or not an image storage area necessary for executing the double-sided simultaneous reading mode can be secured for each reading operation on one original, and the determination result is The image processing apparatus according to claim 7, wherein the double-sided simultaneous reading mode is switched to the double-sided reading mode accordingly.
[0110]
[Embodiment 17] Document feeding means for feeding a document, first reading means for reading a first surface of a document fed by the document feeding means, and feeding by the document feeding means A second reading means for reading the second surface of the original document, and the second surface of the original document read by the first reading means after the first surface is read by the first reading means. An image reading method of an image processing apparatus including a document reversing unit that reverses and re-feeds as possible, a mode setting step for setting any one of a double-sided simultaneous reading mode and a double-sided reading mode; When the double-sided simultaneous reading mode is set, reading of the first surface of the document fed by the document feeding unit by the first reading unit and second scanning of the document by the second reading unit are performed. When the double-sided simultaneous reading step for reading the surface almost simultaneously and the double-sided reading mode is set, the first reading unit reads the first side of the document fed by the document feeding unit. And a double-sided reading step of reversing and refeeding the document whose first surface is read by the document reversing unit and reading the second surface of the re-fed document by the first reading unit. A characteristic image reading method.
[0111]
[Embodiment 18] The image reading method according to Embodiment 17, wherein the double-sided simultaneous reading mode is a speed priority reading mode.
[0112]
[Embodiment 19] The image reading method according to Embodiment 17 or 18, wherein the double-sided reading mode is an image quality priority reading mode.
[0113]
[Embodiment 20] Document feeding means for feeding a document, first reading means for reading at least a first surface of a document fed by the document feeding means, and paper fed by the document feeding means A second reading unit that reads the second side of the original and the first side after the first side is read by the first reading unit so that the second side of the original can be read by the first reading unit. An image reading method of an image processing apparatus comprising a document reversing unit for re-feeding and re-feeding and a storage unit for securing an image storage area, wherein either one of the duplex scanning mode and the duplex scanning mode is selected. When the mode setting step for setting the mode and the duplex reading mode are set, the first reading unit reads the first side of the document fed by the document feeding unit, and then A double-sided reading step of reversing and refeeding a document whose first surface has been read by the document reversing unit, and reading the second surface of the re-fed document by the first reading unit, and the double-sided simultaneous reading mode Is set, a determination step for determining whether or not an image storage area necessary for the execution of the double-sided simultaneous reading mode can be secured in the storage unit, and for the execution of the double-sided simultaneous reading mode are necessary. When the image storage area can be secured in the storage unit, the first reading unit reads the first side of the document fed by the document feeding unit and the second reading unit reads the document. The double-sided simultaneous reading step for reading the second side of the image and the image storage area necessary for executing the double-sided simultaneous reading mode can be secured in the storage unit. If no, the image reading method characterized by comprising a switching step of switching the double-sided simultaneous reading mode to the double-sided reading mode.
[0114]
[Embodiment 21] The image reading method according to Embodiment 20, wherein the double-sided simultaneous reading mode is a speed priority reading mode.
[0115]
[Embodiment 22] The image reading method according to embodiment 20 or 21, wherein the double-sided reading mode is an image quality priority reading mode.
[0116]
[Embodiment 23] An embodiment characterized in that, as the image storage area necessary for executing the double-sided simultaneous reading mode, an image storage area for two sides necessary for one document reading operation is secured in the storage means. 20. The image reading method according to 20.
[0117]
[Embodiment 24] It is set in advance whether to permit switching from the double-sided simultaneous reading mode to the double-sided reading mode when an image storage area necessary for executing the double-sided simultaneous reading mode cannot be secured. 21. The image reading method according to claim 20, further comprising a switching permission setting step.
[0118]
[Embodiment 25] In the determination step, it is determined whether or not an image storage area necessary for executing the double-sided simultaneous reading mode can be secured for each reading operation on one original, and in the switching step, 21. The image reading method according to claim 20, wherein the double-sided simultaneous reading mode is switched to the double-sided reading mode according to the determination result.
[0119]
[Embodiment 26] Document feeding means for feeding a document, first reading means for reading a first surface of a document fed by the document feeding means, and feeding by the document feeding means A second reading means for reading the second surface of the original document, and the second surface of the original document read by the first reading means after the first surface is read by the first reading means. A program for controlling image reading in an image processing apparatus that includes a document reversing unit that reverses and re-feeds as much as possible, and sets one of a duplex scanning mode and a duplex scanning mode. When the mode setting module and the double-sided simultaneous reading mode are set, the reading of the first side of the document fed by the document feeding unit by the first reading unit and the second When the double-sided scanning mode is set, and when the double-sided scanning mode is set, the double-sided scanning module substantially simultaneously reads the second side of the document by the scanning unit. After reading the first side of the original, the original whose surface has been read by the original reversing means is reversed and re-fed, and the second side of the original re-fed by the first reading means is read. A program comprising a duplex reading module for reading.
[0120]
[Embodiment 27] Document feeding means for feeding a document, first reading means for reading at least a first surface of a document fed by the document feeding means, and paper fed by the document feeding means A second reading unit that reads the second side of the original and the first side after the first side is read by the first reading unit so that the second side of the original can be read by the first reading unit. Is a program for controlling image reading in an image processing apparatus having a document reversing means for re-feeding and re-feeding, and a storage means for securing an image storage area. When the duplex reading mode is set, a mode setting module that sets any of the modes is fed by the document feeding unit by the first reading unit. After reading the first side of the original, the original whose surface has been read by the original reversing means is reversed and re-fed, and the second side of the original re-fed by the first reading means is read. A double-sided reading module for reading, and a determination module for determining whether or not an image storage area necessary for executing the double-sided simultaneous reading mode can be secured in the storage unit when the double-sided simultaneous reading mode is set; When the image storage area necessary for executing the double-sided simultaneous reading mode can be secured in the storage unit, the first side of the document fed by the document feeding unit by the first reading unit is stored. A double-sided simultaneous reading module that performs reading and reading of the second side of the document by the second reading unit substantially simultaneously, and execution of the double-sided simultaneous reading mode. If main image storage area can not be secured in the storage unit, the program characterized by having a switching module for switching the double-sided simultaneous reading mode to the double-sided reading mode.
[0121]
【The invention's effect】
As described above, according to the present invention, it is possible to perform double-sided reading according to user needs.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an overall configuration of an image input / output system according to a first embodiment of the present invention.
2 is a longitudinal sectional view schematically showing an internal configuration of a reader unit 200 and a printer unit 300 of FIG.
3 is a plan view showing a configuration of an operation unit 150 in FIG. 1. FIG.
4 is a block diagram showing a configuration of a control device 110 in FIG. 1. FIG.
5 is a diagram showing an example of a memory map of a page memory storage area provided in the RAM 121 of FIG. 4; FIG.
6 is a block diagram illustrating a configuration of a reader control device 400 that controls the reader unit 200 of FIG. 1;
7 is a timing chart until image signals output from the CCD 128 and the CIS 220 are output from the image processing unit 401 and the image processing unit 402, respectively.
FIG. 8 is a diagram illustrating the order of image signals output from a MUX 405;
9 is a diagram showing an example of a standard copy screen displayed on the LCD touch panel 600. FIG.
FIG. 10 is a diagram illustrating an example of a double-sided setting screen.
11 is a diagram showing a copy standard screen when a mode for specifying double-sided printing such as double-sided setting or double-sided setting is set on the double-sided setting screen of FIG. 10;
FIG. 12 is a diagram illustrating a can mode setting screen.
FIG. 13 is a flowchart illustrating a processing procedure of a copy task.
14 is a flowchart showing a processing procedure of the reading task of FIG.
FIG. 15 is a flowchart illustrating a processing procedure of the reading task in FIG. 13;
FIG. 16 is a flowchart showing a processing procedure of a reading task of the image input / output system according to the second embodiment of the present invention.
FIG. 17 is a flowchart showing a processing procedure of a reading task of the image input / output system according to the second embodiment of the present invention.
FIG. 18 is a flowchart showing a processing procedure of a reading task of the image input / output system according to the second embodiment of the present invention.
FIG. 19 is a diagram showing a scan mode setting screen of the image input / output system according to the second embodiment of the present invention.
[Explanation of symbols]
110 Control device
120 CPU
121 RAM
123 ROM
150 Operation unit
200 Reader section
210 Scanner unit
218 CCD
220 CIS
250 Document feeder
300 Printer section
400 Reader control device
405 MUX
407 Reader CPU

Claims (7)

A document feeding means for feeding a document;
First reading means for reading a first surface of a document fed by the document feeding means;
A second reading unit for reading a second surface of the document fed by the document feeding unit;
A document reversing unit that flips and re-feeds the original after the first side is read by the first reading unit so that the second side of the original can be read by the first reading unit;
Mode setting means for setting any one of the double-sided simultaneous reading mode and the double-sided sequential reading mode;
When the double-sided simultaneous reading mode is set, the first side of the original fed by the original feeding unit by the first reading unit and the second side of the original by the second reading unit are set. When the double-sided sequential reading mode is set, after reading the first side of the document fed by the document feeding unit by the first reading unit, Control means for controlling to invert and refeed the document whose first surface is read by the document reversing means and to read the second surface of the re-fed document by the first reading means. An image reading apparatus. 2. The image reading apparatus according to claim 1, wherein the first reading unit reads an original image at a reduced size, and the second reading unit reads the original at an equal magnification. The image reading apparatus according to claim 1, wherein the double-sided simultaneous reading mode is a speed priority reading mode, and the double-sided sequential reading mode is an image quality priority reading mode. A document feeding means for feeding a document, a first reading means for reading a first surface of a document fed by the document feeding means, and a first of the documents fed by the document feeding means. A second reading unit for reading two sides, and the original after the first side is read by the first reading unit so that the second side of the original can be read by the first reading unit And an image reading method of an image processing apparatus comprising a document reversing unit for refeeding,
A mode setting step for setting either the double-sided simultaneous reading mode or the double-sided sequential reading mode;
When the double-sided simultaneous reading mode is set, the first side of the original fed by the original feeding unit by the first reading unit and the second side of the original by the second reading unit are set. A double-sided simultaneous reading process that performs almost simultaneous reading,
When the duplex sequential reading mode is set, the first surface is read by the document reversing unit after the first surface of the document fed by the document feeding unit is read by the first reading unit. An image reading method comprising: a double-sided reading step of reversing and refeeding a document and reading a second side of the document re-fed by the first reading unit. 5. The image reading method according to claim 4, wherein the simultaneous duplex reading mode is a speed priority reading mode, and the duplex sequential reading mode is an image quality priority reading mode. A document feeding means for feeding a document, a first reading means for reading a first surface of a document fed by the document feeding means, and a first of the documents fed by the document feeding means. A second reading unit for reading two sides, and the original after the first side is read by the first reading unit so that the second side of the original can be read by the first reading unit And a program for controlling image reading in an image processing apparatus comprising a document reversing unit for refeeding,
A mode setting module for setting either the duplex simultaneous scanning mode or the duplex sequential scanning mode;
When the double-sided simultaneous reading mode is set, the first side of the original fed by the original feeding unit by the first reading unit and the second side of the original by the second reading unit are set. A double-sided simultaneous reading module that reads images almost simultaneously,
When the duplex sequential reading mode is set, the first surface is read by the document reversing unit after the first surface of the document fed by the document feeding unit is read by the first reading unit. A program comprising: a double-sided reading module for reversing and refeeding a document and reading a second surface of the re-fed document by the first reading unit. 7. The program according to claim 6, wherein the double-sided simultaneous reading mode is a speed-priority reading mode, and the double-sided sequential reading mode is an image quality priority reading mode.

Images