JP6064390B2 - Image reading apparatus, image reading system, image reading program, and portable terminal program - Google Patents

Description

  The present invention relates to a technique for transmitting read image data acquired by an image reading apparatus to a mobile terminal.

  Conventionally, there is a technique for transmitting read image data acquired by an image reading apparatus to a portable terminal. As an example, the MFP generates reduced image data that has been reduced to an image size that matches the display size of the mobile terminal from read image data obtained by reading an original image on an original sheet, or There is a technique of generating data of a plurality of divided images subdivided into display sizes and collecting them into one file and transmitting them to a portable terminal (see Patent Document 1). Since the reduced image data and the data of the plurality of divided images are sizes corresponding to the display size, they can be easily handled on the mobile terminal side as compared with the read image data itself.

JP 2011-91663 A

  By the way, there are cases where it is desired to transmit the read image data itself from the image reading apparatus to the portable terminal. For example, the data of the read image is transferred from the portable terminal to a printer on the go and printed out, or transferred to a cloud server. However, in the above-described conventional technique, only the data of a reduced image obtained by processing the data and the data of a plurality of divided images are transmitted instead of the read image data itself.

  In addition, the read image acquired by the image reading apparatus may be different from the one desired by the user. For example, the document image in the read image is tilted, the top / bottom of the document image is reversed, or characters and the like are difficult to see because the resolution of the document image is low. For this reason, it is preferable to display and confirm the read image on the display unit of the mobile terminal. However, even if a reduced image is displayed in the above-described conventional technique, the reduced image has a relatively low resolution, and thus the read image cannot be confirmed accurately. Moreover, in the above-described conventional technology, a huge amount of data in which reduced image data and a plurality of divided image data are combined into one file is transmitted to the mobile terminal. It takes time to display and check the image.

  In the present specification, a technique is disclosed in which a read image acquired by an image reading apparatus can be confirmed early and accurately on the mobile terminal side as compared with the conventional technique.

  An image reading device disclosed in this specification includes a communication unit that performs data communication with a portable terminal having a display unit, an image reading unit that reads a document image on a document sheet, and a control unit, and the control unit Is a reading process for reading the original image by the image reading unit to obtain a read image, and has the same magnification as the read image, and has an image size corresponding to the display capability of the display unit of the read image. Partial image generation processing for generating partial image data, partial transmission processing for transmitting the partial image data to the portable terminal by the communication unit, and after execution of the partial transmission processing, the communication unit from the portable terminal A determination process for determining whether or not a whole image request command has been received; and when determining that the whole image request command has been received in the determination process, the communication unit It has the structure of a data run, and the overall transmission process of transmitting to the portable terminal.

  According to this image reading apparatus, partial image data having the same magnification as the read image and corresponding to the display capability of the display unit of the mobile terminal is generated and transmitted to the mobile terminal. The partial image data can be transmitted to the mobile terminal in a short time because the data amount is smaller than the data of the entire read image. In addition, since the partial image has the same magnification as the read image and the image size corresponds to the display capability of the display unit of the mobile terminal, the display unit does not reduce a part of the read image. Can be displayed. As a result, compared with the above-described conventional technique, the read image of the document read by the image reading apparatus can be confirmed early and accurately on the portable terminal side.

  In the image reading apparatus, the control unit has a configuration that performs an extraction process for extracting a reference pixel having a pixel value equal to or larger than a reference pixel value from the read image, and in the partial image generation process, the reference pixel An image of the image size including the image may be used as the partial image.

  According to this image reading apparatus, a reference pixel having a pixel value equal to or larger than the reference value is extracted from the read image, and an image having an image size including the reference pixel is set as a partial image. As a result, compared to a configuration in which a partial image is determined without extracting reference pixels, characters, figures, symbols, and the like on the document image are not included in the partial image and cannot be confirmed on the display unit of the mobile terminal. It is possible to suppress this.

  In the image reading device, in the extraction process, the control unit divides the read image into a plurality of blocks, and from the plurality of blocks, the number of the reference pixels or the pixels for all the pixels in the block. A reference block in which the ratio of reference pixels exceeds a reference value is extracted, and in the partial image generation process, an image having the image size including the reference block may be used as the partial image.

  According to this image reading apparatus, the read image is divided into a plurality of blocks, and a reference block in which the number of reference pixels or the ratio of the reference pixels to all the pixels in the block exceeds the reference value is divided from the plurality of blocks. Extracted. An image having an image size including the reference block is set as a partial image. As a result, the influence of noise images such as dust on the document sheet can be suppressed as compared with a configuration in which a partial image is determined by only one reference pixel.

  In the image reading apparatus, when the control unit executes the partial image generation process and the partial transmission process during execution of the reading process, and determines that the whole image request command is received in the determination process, When the reading process is continued and it is determined that the whole image request command has not been received, the reading process may be stopped.

  According to this image reading apparatus, when it is determined that the entire image request command is received, the reading process is continued, and when it is determined that the entire image request command is not received, the reading process is stopped. As a result, it is possible to prevent the reading process from being unnecessarily continued even though there is no entire image request command.

  In the image reading device, the control unit includes a storage unit having a first storage area in which data of the read image is stored and a second storage area in which data of the partial image is stored. In the partial transmission process, a part of the partial image data may be started to be transmitted to the mobile terminal from the time when the partial image data is partially stored in the second storage area.

  According to this image reading apparatus, a part of the partial image data starts to be transmitted to the portable terminal from the time when the partial image data is stored in the second storage area. As a result, the partial image is transmitted on the mobile terminal side earlier than the configuration in which the transmission of the partial image data is started after waiting until all the partial image data is stored in the second storage area. Can be confirmed.

  In the image reading apparatus, the control unit may have a configuration in which the communication unit performs display capability reception processing for receiving information on the display capability from the portable terminal.

  According to this image reading apparatus, information regarding display capability is received from the portable terminal. This makes it possible to accurately grasp the display capability of the mobile terminal that is currently the transmission destination of the read image data.

  The present invention is applied to various aspects such as an image reading system, a portable terminal, an image reading method, an image receiving method, a computer program for realizing the functions of these methods or apparatuses, and a recording medium on which the computer program is recorded. Can be realized.

  According to the invention disclosed by this specification, compared with the said prior art, it is possible to confirm the read image acquired with the image reading apparatus early and correctly on the portable terminal side.

1 is an electrical configuration diagram of an image reading system according to an embodiment. Flow chart showing reception control processing Flow chart showing reading control processing Schematic diagram of the original sheet Explanatory drawing of the divided read image Schematic diagram of a mobile terminal displaying a partial image Schematic diagram of a mobile terminal displaying a reduced image

  An image reading system 1 according to an embodiment will be described with reference to FIGS. The image reading system 1 includes a multifunction device 2 and a portable terminal 3 and can perform data communication with each other by a wireless method.

(Electric configuration of the multifunction device)
As shown in FIG. 1, the multifunction machine 2 is an example of an image reading apparatus, and can execute a plurality of functions such as a duplication function in addition to an image reading function. Specifically, the multifunction device 2 includes a wireless communication unit 21, an image reading unit 22, a reading side control unit 23, a printing unit 24, and the like.

  The wireless communication unit 21 is an example of a reading side communication unit, and performs data communication with the portable terminal 3 by a wireless method. The image reading unit 22 has a CIS (Contact Image Sensor), reads a document image G on a document sheet M (see FIG. 4), and outputs read data of a pixel row corresponding to the read image H. It is. Note that the image reading unit 22 is not limited to the CIS, and may be configured to have, for example, a CCD (Charge Coupled Drive Image Sensor).

  The reading side control unit 23 includes a central processing unit (hereinafter referred to as CPU) 25, a ROM 26, a RAM 27, and an image processing unit 28. The ROM 26 stores a program (an example of an image reading program) for executing a reading control process, which will be described later, and a program for executing various operations of the multifunction device 2. The CPU 25 controls each unit of the multifunction machine 2 according to the program read from the ROM 26. In addition to the ROM 26 and the RAM 27, the medium storing the various programs may be a non-volatile memory such as a CD-ROM, a hard disk device, or a flash memory (registered trademark).

  The RAM 27 is an example of a storage unit. The read data output from the image reading unit 22 is AD-converted by an AD conversion unit (not shown) and stored after being subjected to processing such as shading correction by the image processing unit 28. The image processing unit 28 is a hardware circuit dedicated to image processing, for example, and executes processing such as shading correction and block division processing described later. The printing unit 24 prints an image based on the image data such as the read data on an unprinted sheet (not shown) by, for example, an electrophotographic method or an inkjet method.

(Electrical configuration of mobile terminal)
The portable terminal 3 includes a wireless communication unit 31, an operation unit 32, a display unit 33, a terminal side control unit 34, and the like. The wireless communication unit 21 is an example of a terminal-side communication unit, and performs data communication with the multifunction device 2 by a wireless method. As illustrated in FIGS. 6 and 7, the operation unit 32 is an example of a reception unit, includes a plurality of buttons, and allows various input operations by the user. The display unit 33 includes a display screen 33A such as a liquid crystal display or an organic EL, and can display various setting screens, read images H, and the like. In addition, although the operation part 32 and the display part 33 may be arrange | positioned separately, both may be integrated, such as a touchscreen part in which the touch input by a user is possible on the display screen 33A.

  The terminal side control unit 34 includes a central processing unit (hereinafter referred to as CPU) 35, a ROM 36, and a RAM 37. The ROM 36 stores a program for executing a reading and receiving process (an example of a program for a portable terminal) to be described later, and a program for executing various operations of the portable terminal 3. The CPU 35 controls each unit of the mobile terminal 3 according to the program read from the ROM 36. In addition to the ROM 36 and the RAM 37, the medium for storing the various programs may be a non-volatile memory such as a CD-ROM, a hard disk device, or a flash memory.

(Control processing of image reading system)
Hereinafter, an example in which the multi-function device 2 reads the original image G on the original sheet M shown in FIG. 4 and finally transmits the data of the entire read image H to the portable terminal 3 will be described as an example. . The document image G includes a first document image G1 drawn in the upper left portion of the document sheet M, a second document image G2 drawn in the upper right portion, and a third document image G3 drawn in the lower portion.

(1) Transmission of reading command and display capability information by portable terminal, etc. For example, when the user turns on the portable terminal 3 and activates the image reading software, the terminal-side control unit 34 performs the reception control shown in FIG. Execute the process. First, the CPU 35 determines whether or not reading conditions such as resolution and color / monochrome are set (S1). The user can set various reading conditions by an input operation of the operation unit 32. When determining that the reading condition has been set (S1: YES), the CPU 35 determines whether or not a reading instruction has been issued (S2). The user can give a reading instruction by an input operation of the operation unit 32.

  When the CPU 35 determines that a reading instruction has been issued (S2: YES), the wireless communication unit 31 transmits a reading command including the above reading conditions and display capability information to the multi function device 2 (S3, S4). reference). The display capability information is information relating to the display capability of the display unit 33, such as the display size and resolution of the image display portion in the display screen 33A. Hereinafter, the display capability information will be described by taking a horizontal width X (for example, 480 pixels) and a vertical width Y (for example, 640 pixels) as examples (see FIG. 6). Note that the display capability information is stored in the ROM 36 in advance. 6 and 7, the image display portion is the same size as the display screen 33A, but may be smaller than the display screen 33A.

(2) Transmission of Partial Image Data by Multi-Function Device For example, when the power of the multi-function device 2 is turned on, the reading-side control unit 23 executes a reading control process shown in FIG. First, the CPU 25 determines whether or not the read command is received from the portable terminal 3 by the wireless communication unit 21 (S21). If the CPU 25 determines that a read command has been received (S21: YES), the wireless communication unit 21 receives the display capability information from the portable terminal 3 (S22). As a result, when there is a possibility that a plurality of types of portable terminals 3 may be the transmission destination of the read data, the multifunction device 2 displays the display capability information of the portable terminal 3 itself from the portable terminal 3 that is the current transmission destination. Can be obtained.

  Upon receiving the display capability information, the CPU 25 secures a partial image buffer 27B having a storage capacity corresponding to the display capability of the mobile terminal 3 in the RAM 27 based on the display capability information (S23). For example, the storage capacity of the partial image buffer 27B increases as the display size increases, and the storage capacity of the partial image buffer 27B increases as the resolution increases. However, the storage capacity may be smaller than the data amount of data of the partial image H1 described later. Note that an entire image buffer 27A is secured in the RAM 27, in which the read data output from the image reading unit 22 is stored. The whole image buffer 27A is an example of a first storage area, and the partial image buffer 27B is an example of a second storage area.

  When the CPU 25 secures the partial image buffer 27B, the CPU 25 starts the reading process of reading the document image G by the image reading unit 22 and acquiring the read data of the read image H (S24). As a result, the image reading unit 22 sequentially reads the document image G from the upper end to the lower end of the document sheet M shown in FIG. 4, and as a result, the read data is sequentially stored in the entire image buffer 27A.

  The read data output from the image reading unit 22 is AD converted by an AD conversion unit (not shown) and converted to pixel values of 0 to 255. The pixel value 0 indicates black, and the pixel value 255 indicates white. When the image processing unit 28 starts the reading process, the image processing unit 28 executes an extraction process for extracting a reference pixel whose pixel value is in the range of 0 to 224 from the read image H, and includes a partial image including characters, graphics, symbols, and the like. H1 is determined. First, as shown in FIG. 5, the image processing unit 28 divides the image portion of the acquired read data into a plurality of blocks B each time the read data for a predetermined number of lines is acquired from the image reading unit 22. Block division processing is executed (S25). The lines are lines along the sub-scanning direction, and the predetermined number of lines is the number of lines corresponding to the width of at least one block B. Hereinafter, a block corresponding to a predetermined line is referred to as a block row. The blocks B are preferably all the same size. As a result, the read image H is sequentially divided into a plurality of blocks B from the front end to the rear end in the reading direction.

  Next, the image processing unit 28 counts the number of reference pixels for each of a plurality of blocks B included in the block row for each block row (S26). Then, the image processing unit 28 determines from the count result whether there is a reference block B1 in which the number of reference pixels or the ratio of the reference pixel number to the total number of pixels in the block is 20% or more ( S27). When the image processing unit 28 determines that there is no reference block B1 (S27: NO), the image processing unit 28 returns to S25 and executes block division processing based on the read data for the next predetermined number of lines.

  When the image processing unit 28 determines that the reference block B1 is present (S27: YES), the image processing unit 28 executes a partial image generation process for generating data of the partial image H1 including the reference block B1. The partial image H1 has the same magnification as the read image H, and has the same image size as the display size of the read image H. The same magnification is not limited to the case where the magnification is completely the same, but may be a few percent or a different magnification. In short, the magnification may be substantially the same. In the example of FIG. 5, the reference block B1 is first extracted in the third block row from the upper end of the read image H, and the original image G1 having the reference block B1 as the leading edge and the horizontal width X and the vertical width Y is obtained. The included image is the partial image H1.

  For example, the CPU 25 starts to store the data of the partial image H1 in the partial image buffer 27B starting from the first extracted leftmost reference block B1 (S28), and the stored data of the partial image H1 is stored in the mobile terminal. 3 is started (S29 see FIG. 1). Specifically, the CPU 25 transmits the partial image H1 data partially and sequentially to the mobile terminal 3 without waiting for all the partial image H1 data to be stored in the partial image buffer 27B.

  In the example of FIG. 5, when the CPU 25 stores the block sequence data including the reference block B1 in the partial image H1 in the partial image buffer 27B, the CPU 25 starts to transmit the block sequence data to the mobile terminal 3. Thereby, the partial image H1 is transmitted to the portable terminal 3 side earlier than the configuration in which transmission of the data of the partial image H1 is started after waiting for all the data of the partial image H1 to be stored in the partial image buffer 27B. It is possible to transmit and have the user confirm.

(3) Transmission of image reading continuation command by portable terminal, etc. As shown in FIG. 2, the CPU 35 of the portable terminal 3 starts a partial reception process for receiving the data of the partial image H1 from the multi-function device 2, and the partial image H1. It is determined whether or not reception of all the data has been completed (S5). Note that the data of the partial image H1 is stored in the RAM 37. When the CPU 35 determines that the reception of all the data of the partial image H1 is completed (S5: YES), as shown in FIG. 6, the partial display processing for displaying the partial image H1 on the entire display screen 33A of the display unit 33. And the message G4 is displayed on the display screen 33A (S6). This message G4 is for asking the user whether or not to continue image reading.

  As described above, the partial image H <b> 1 is a part of the read image H that is finally desired to be transmitted to the mobile terminal 3 displayed at the same magnification as the read image H. Therefore, the user can confirm the image quality of the read image H such as the resolution, the degree of image inclination, the image orientation, and the expression color by viewing the partial image H1. If the partial image H1 has a desired image quality, the user presses the determination button 32A of the operation unit 32. Then, the CPU 35 determines to continue the image reading (S7: YES), and transmits an image reading continuation command to the multi-function device 2 (see FIG. 1 in S8). On the other hand, if the partial image H1 is not the desired image quality, the user presses the return button 32B of the operation unit 32. Then, the CPU 35 determines that the image reading is to be stopped (S7: NO), and transmits an image reading stop command to the multi function device 2 (S9, see FIG. 1). The continuation command is an example of an entire image request command, and the process of S8 is an example of a request command transmission process. The data of the partial image H1 may be deleted from the RAM 37 after it is determined whether or not to continue the reading process, or the next received data may be overwritten.

(4) Continuation and Cancellation of Image Reading by Multi-Function Device As shown in FIG. 3, the CPU 25 of the multi-function device 2 executes determination processing for determining whether or not a continuation command is received from the portable terminal 3 (S30). When the CPU 25 determines that the continuation instruction has been received (S30: YES), the CPU 25 starts an entire transmission process for transmitting the entire read image H data stored in the entire image buffer 27A to the portable terminal 3 (S31). . Note that the CPU 25 starts the entire transmission process even if the reading process for the entire document sheet M is not completed. Thereby, the data of the entire read image H can be transmitted to the portable terminal 3 at an early stage as compared with the configuration in which the entire transmission process is started after the reading process of the entire original sheet M is completed. When the reading process is completed (S32), the CPU 25 returns to S21.

  On the other hand, if the CPU 25 determines that a stop command has been received (S30: NO), the CPU 25 stops the reading process started in S24 (S33) and returns to S21. Thereby, it is possible to prevent the reading process from being unnecessarily continued despite the user's instruction to stop image reading.

(5) Display of read image by portable terminal, etc. As shown in FIG. 2, after transmitting the continuation command, the CPU 35 of the portable terminal 3 executes the entire reception process for receiving the entire read image H data from the multifunction device 2. (S10) and stored in the RAM 37. Next, the CPU 35 reduces the read image H to the display size of the display screen 33A based on the received data of the entire read image H (S11). Then, as shown in FIG. 7, the CPU 35 displays the reduced image H2 on the display unit 33 (S12), and returns to S1. Thereby, the user can confirm the entire read image H on the display screen 33A.

(Effect of this embodiment)
According to the present embodiment, data of the partial image H <b> 1 having the same magnification as the read image H and corresponding to the display capability of the display unit 33 of the mobile terminal 3 is generated and transmitted to the mobile terminal 3. . The data of the partial image H1 can be transmitted to the mobile terminal 3 in a short time because the data amount is smaller than the data of the entire read image H. Further, since the partial image H1 has the same magnification as the read image H and the image size corresponds to the display capability of the display unit 33 of the mobile terminal 3, a part of the read image H is reduced. Without being displayed on the display unit 33 as it is. As a result, compared with the above-described conventional technology, the read image H of the original sheet M read by the multifunction machine 2 can be confirmed early and accurately on the portable terminal 3 side, although it is partial. is there. On the mobile terminal 3 side, a partial image for confirmation can be displayed on the display unit 33 without processing the read image H or the like.

  A reference pixel having a pixel value equal to or greater than the reference value is extracted from the read image H, and an image having an image size including the reference pixel is set as the partial image H1. Thereby, compared to the configuration in which the partial image is determined without extracting the reference pixel, characters, figures, symbols, etc. on the document image G are not included in the partial image and cannot be confirmed on the display unit 33 of the portable terminal 3. Can be prevented from occurring.

  In addition, the read image H is divided into a plurality of blocks B, and a reference block B1 is extracted from the plurality of blocks B. An image having an image size including the reference block B1 is set as a partial image H1. As a result, the influence of noise images such as dust on the document sheet M can be suppressed as compared with a configuration in which a partial image is determined by only one reference pixel.

<Other embodiments>
The technology disclosed in the present specification is not limited to the embodiments described with reference to the above description and drawings, and includes, for example, the following various aspects.

  In the above-described embodiment, the multifunction device 2 is used as an example of the image reading apparatus. However, the present invention is not limited to this, and the image reading apparatus may be a single scanner apparatus having only a scanner function or a facsimile apparatus.

  In the said embodiment, the radio | wireless communication parts 21 and 31 were mentioned as an example as an example of a communication part. However, the present invention is not limited to this, and the communication unit may be a wired communication unit that performs data communication in a wired manner. However, since the data communication time is longer in the wireless method than in the wired method, the configuration of the image reading system 1 is particularly effective.

  In the above embodiment, the reading-side control unit 23 is configured to execute the reading control process by the CPU 25, the image processing unit 28, and the like. However, the present invention is not limited to this, and the reading-side control unit 23 may be configured to execute reading control processing by a plurality of CPUs, or may be configured to execute reading control processing only by a hardware circuit such as ASIC (Application Specific Integrated Circuit). For example, the CPU 25 may be configured to execute at least one of S25 to S27 in FIG.

  In the above embodiment, the terminal-side control unit 34 is configured to execute reception control processing by the CPU 35 or the like. However, the present invention is not limited to this, and the terminal-side control unit 34 has a configuration in which the reading control processing is executed by a plurality of CPUs, a configuration in which the reading control processing is executed only by a hardware circuit such as an ASIC, or one or more CPUs and hardware circuits. The reading control process may be executed by the above. For example, the hardware circuit may execute at least one of S6, S11, and S12 in FIG.

  In the above embodiment, an example in which a user inputs a reading command by an input operation of the operation unit 32 of the mobile terminal 3 has been described. However, the present invention is not limited to this, and a configuration in which a user inputs a reading command and a reading condition by an input operation of an operation unit (not shown) of the multifunction device 2 may be used. In this case, when the terminal-side control unit 34 receives a reading command including a reading condition from the multi-function device 2, the terminal-side control unit 34 executes the processes after S 4 in FIG. 2.

  In the above embodiment, the multifunction device 2 is configured to receive display capability information from the mobile terminal 3. However, the present invention is not limited to this, and the MFP 2 may have a configuration in which display capability information is associated with each model of the mobile terminal 3 and stored in the RAM 27, for example. In this case, the MFP 2 may be configured to receive information regarding the model of the mobile terminal 3 that is the current transmission destination from the mobile terminal 3 or may be configured to be received by an input operation by a user at an operation unit (not shown).

  The reading side control unit 23 may be configured not to execute the block division processing (S25 to S27) in the reading control processing. For example, the reading-side control unit 23 may perform a reference pixel extraction process without performing a block division process, and an image including the extracted reference pixel may be a partial image. In this configuration, if an image including a plurality of reference pixels adjacent to each other is a partial image, the influence of noise images such as dust adhering to the document sheet M can be suppressed.

  Further, the reading-side control unit 23 may be configured so that an image in a predetermined area of the read image H is a partial image without executing the reference pixel extraction process. Examples of the predetermined region include a region including the reading direction tip of the read image H, a central region of the read image H that is highly likely to include characters, and the like.

  In the above-described embodiment, the partial image is the partial image H1 having the block row from which the reference block B1 is first extracted as the tip. However, the present invention is not limited to this, and the partial image may be an image including the reference block B1. However, if it is partial image H1, possibility that many reference blocks B1 will be included becomes high, and a user can confirm many characters etc. in the portable terminal 3. That is, in the example of FIG. 5, since the first block and the second block row from the leading end do not have the reference block B1, the inclusion of these block rows in the partial image results in the reference block correspondingly in the partial image. The occupation ratio of the block B that is not B1 becomes high. On the other hand, the partial image H1 does not include the first and second block columns, and includes blocks after the fourth column that may include the reference block B1. An increase in the occupation ratio can be suppressed.

  In the above embodiment, the reading-side control unit 23 may start the partial transmission processing in S29 after waiting until all the data of the partial image H1 is stored in the partial image buffer 27B. Alternatively, the reading-side control unit 23 may start the partial transmission process after waiting until all the data of the read image H is stored in the entire image buffer 27A. With such a configuration, it is possible to prevent a situation in which reading of the partial image H1 or the read image H is not normally completed due to, for example, an abnormality in conveyance of the document sheet M after starting transmission of the data of the partial image H1. can do. Whether to start the partial transmission process after waiting until all the data of the read image H is stored in the entire image buffer 27A or not to start the partial transmission process. The configuration may be such that the user can select by an input operation of the operation unit 32.

  In the above embodiment, the reading-side control unit 23 may start the entire transmission process in S31 after the reading process for the entire document sheet M is completed. Accordingly, it is possible to prevent a situation in which the reading process is not normally completed due to, for example, a conveyance abnormality of the document sheet M after the start of the entire transmission process. Whether the entire transmission process is started after the reading process for the entire original sheet M is completed or is started without waiting for the completion, for example, when the reading condition is set, the input of the operation unit 32 of the portable terminal 3 The configuration may be such that the user can select by operation.

  The terminal-side control unit 34 may be configured not to execute the processes of S11 and S12 in the reception control process. This is because the user can partially confirm the read image H by the partial image H1 of S6.

  1: Image reading system 2: Multi-function device 3: Mobile terminal 21, 31: Wireless communication unit 22: Image reading unit 23: Reading side control unit 27: RAM 27A: Whole image buffer 27B: Partial image buffer 33: Display unit 34: Terminal side control unit G: Document image H: Scanned image M: Document sheet

Claims (4)

A communication unit that performs data communication with a mobile terminal having a display unit;
An image reading unit for reading a document image on a document sheet;
A control unit,
The controller is
A receiving process for receiving information on the display capability of the display unit and a read command by the communication unit;
A start instruction process for instructing the image reading unit to start reading the document image based on the reading command and starting acquisition of the read image obtained by reading the document image by the image reading unit ;
After the start instruction process, a partial image generation process for generating partial image data having the same magnification as the read image and having an image size corresponding to the display capability of the display unit in the read image;
Partial transmission processing for transmitting data of the partial image to the mobile terminal by the communication unit;
After the execution of the partial transmission process, a determination process for receiving an entire image request command or a stop command from the mobile terminal by the communication unit;
Run
The control unit further includes:
After the partial transmission process, when the whole image request command is received in the determination process, the reading of the original image by the image reading unit started by the start instruction process is completed, and the read image is read by the communication unit Send the entire data to the mobile device,
An image reading apparatus that stops reading of the original image by the image reading unit started by the start instruction process when the stop instruction is received in the determination process after the partial transmission process. The image reading apparatus according to claim 1,
The controller is
From the read image, having a configuration for executing an extraction process for extracting a reference pixel having a pixel value equal to or greater than a reference pixel value,
In the partial image generation process, an image reading apparatus that uses an image of the image size including the reference pixel as the partial image. The image reading apparatus according to claim 2,
The controller is
In the extraction process,
The read image is divided into a plurality of blocks, and a reference block in which the number of the reference pixels or the ratio of the reference pixels to all the pixels in the block exceeds a reference value is extracted from the plurality of blocks.
In the partial image generation process, an image reading apparatus that uses the image of the image size including the reference block as the partial image. The image reading apparatus according to any one of claims 1 to 3,
The controller is
A configuration having a storage unit having a first storage area in which data of the read image is stored and a second storage area in which data of the partial image is stored;
In the partial transmission process, the image reading apparatus starts transmitting a part of the data of the partial image to the mobile terminal from the time when the part of the data of the partial image is stored in the second storage area.

Images