JP5464993B2 - Image processing apparatus, image processing apparatus control method, and program - Google Patents

Description

  The present invention relates to an image processing apparatus, a control method for the image processing apparatus, and a program.

  Conventionally, when a book manuscript (hereinafter referred to as “book manuscript”) is placed on a manuscript reading table in an open state and an image is read, a black belt at the center of the image generated by the floating of the book manuscript or around the image A book frame erasing function for erasing an image of an extra frame is known. Since the book frame erasing function is not frequently used, the specification is not easily settable, and there is a problem that the user does not know this function or does not know how to set it.

  Further, when image reading is performed with the book frame erasing function set, the setting is stored, and unless the setting is changed, image reading may be performed with the same setting for any document. For this reason, there is a problem in that a desired image corresponding to the type of document cannot be obtained because the center portion of the read image and the necessary frame image around the image are erased.

  Therefore, an image processing apparatus has been proposed which is configured to recognize and erase the width of the black belt generated in the center of the image when the book document image is read in a spread state, and to obtain a good copy image. (For example, refer to Patent Document 1).

JP-A-7-234555

  However, the conventional book frame erasing function can automatically detect the width of the black belt and erase it, but there is a problem that the user cannot confirm the erase result in advance. For example, when a book document is copied using the book frame erase function, it is possible to determine whether or not a desired book frame erase has been performed for the first time by the user viewing the output printed matter. On the other hand, if a desired print result cannot be obtained, the user needs to manually change the setting of the book frame erasing function and perform copying again, so that the work is increased and the paper is wasted.

  In addition, when the number of pages of a book is large and thick, a black belt generated at the center of the image may overlap with characters and images of the document image. In such a case, with the conventional apparatus, the user cannot confirm in advance how much the setting of the book frame erasing function is reflected as intended.

  Although it is possible to display a preview of the document to be read in advance, the specification of the preview display setting is not so simple as the setting of the book frame erasing function. For this reason, the user does not know the function or does not know how to set, and is not kind to the user.

  The present invention has been made in view of the above problems. The present invention provides an image processing apparatus, a method for controlling the image processing apparatus, and an image processing apparatus capable of easily confirming whether or not the image has a desired finish before the user prints out the image subjected to book frame erasing processing. The purpose is to provide a program.

In order to achieve the above object, the image processing apparatus of the present invention, a document reading table, and an image reading hand stage reads the image of the document placed on the document reading table, from an image read by said image reading means A specifying means for specifying an image portion of a black belt in the center of the image, a determining means for determining an image portion in a predetermined range overlapping the black belt as an erasure candidate, and the specifying from an image read by the image reading means and transmission processing means for transmitting processed image portion in the predetermined range determined by said determining means, leaving the image portion of the black band identified by means by the transmission processing of the image portion of the predetermined range image processing means for creating a preview image based on the image after the transmission processing is preview displayed on the display means a preview image created by the image processing unit And having a control means for controlled so.

  According to the present invention, when a user issues an instruction to start reading a document without making any special settings, a preview image that has been automatically subjected to book frame erasure processing is displayed for a book document. As a result, before the user prints out the image subjected to the book frame erasing process, it can be easily confirmed whether or not the image has a desired finish.

1 is a block diagram illustrating an outline of a hardware configuration of an image processing apparatus according to a first embodiment of the present invention. FIG. 2 is an external perspective view of a document reading table in the image processing apparatus of FIG. 1. 2 is a flowchart showing a flow of image reading processing executed by the image processing apparatus of FIG. 1. 4 is a flowchart showing details of a book frame erasure preview process in step S404 in FIG. (A) A diagram showing a state of a book document placed on a document reading table in a spread state, (b) a diagram showing an example of an image read by the scanner in that state, (c) a histogram created from the image It is a figure which shows an example. (A) The figure which shows an example of the image before a book frame erasing process, (b) The figure which shows an example of the image after a book frame erasing process. (A) A figure showing an example of a screen on which a preview image after book frame erasure processing is displayed, (b) A figure showing an example of a book frame erasure setting screen. FIG. 4A is a partial view of a preview image in which a part of an original image is erased by book frame erasure processing, and FIG. (A) An external perspective view of a document reading table in an image processing apparatus according to a second embodiment of the present invention, (b) a diagram showing a state of a paper document placed on the document reading table, and (c) a spread state. FIG. 6 is a diagram illustrating a state of a book document placed on a document reading table.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment]
FIG. 1 is a block diagram showing an outline of the hardware configuration of the image processing apparatus according to the first embodiment of the present invention.

  In FIG. 1, the CPU 100 controls each unit in the image processing apparatus by executing various control programs read from a ROM (Read Only Memory) 109. For example, the CPU 100 performs storage control of the RAM 104 and an HDD (Hard Disk Drive) (not shown) based on the read program.

  The operation unit 101 includes a setting unit 102 and a display unit 103. The setting unit 102 includes a hard key, a liquid crystal touch panel key, and the like, and receives an operation input from a user. The display unit 103 displays a preview image created by the image processing unit 108, various setting screens, and the like. The setting unit 102 and the display unit 103 may be configured by an integrated liquid crystal touch panel or the like, or may be separate.

  The scanner 106 is an image reading device that reads an image from a document placed on a document reading table or a document transported from an automatic document transport device. A RAM (Random Access Memory) 104 is used as a work area for the CPU 100 and as an area for storing an image read by the scanner 106 as image data. The scanner control unit 105 is connected to the scanner 106 and performs predetermined processing on the image read by the scanner 106.

  The book document determination unit 107 determines whether the document placed on the document reading table is a paper document or a book document (book document) from the image read by the scanner 106. The image processing unit 108 performs image processing for converting an image read by the scanner 106 or an image transmitted from an external device (not shown) such as a PC (Personal Computer) into an image suitable for printing. Further, the image processing unit 108 performs a book frame erasing process for erasing the black belt at the center of the image read by the scanner 106 or an image of an extra frame around the image, or the book frame erasing process is performed. A preview image to be displayed on the display unit 103 is created from the image.

  Note that the image processing apparatus according to the present embodiment actually includes a print control unit, a printer engine, and the like. However, these are not related to the present invention, and the illustration and description are omitted.

  FIG. 2 is an external perspective view of a document reading table in the image processing apparatus of FIG.

  In FIG. 2, a contact glass 201 serving as a document reading table is disposed on the upper part of the image processing apparatus.

  When reading an image of the book document 202, the user opens an automatic document feeder (ADF) (or pressure plate) 200 that transports the sheet document one by one to the image reading position on the contact glass 201, and the book document 202 in a spread state is opened. Is placed on the contact glass 201. Then, the book document 202 is positioned, the ADF 200 is closed, and the book document 202 is pressed against the contact glass 201. In this state, when a scan button (not shown) on the setting unit 102 is pressed, image reading of the book document 202 is started. When image reading is performed on a paper document other than a book document, the paper document is placed on the contact glass 201 or placed on the ADF 200 in the same manner as described above.

  Next, book frame erasure preview processing in the image processing apparatus will be described with reference to the flowcharts of FIGS. Note that the processing described below is processing executed by the CPU 100 and various functional units shown in FIG. 1 based on programs stored in the ROM 109, RAM 104, HDD (not shown), and the like shown in FIG.

  FIG. 3 is a flowchart showing the flow of image reading processing executed by the image processing apparatus of FIG. Prior to this processing, it is assumed that either a book document or a paper document is placed on the contact glass 201 by the user and the ADF 200 is closed.

  In FIG. 3, when the setting unit 102 detects that a scan button (not shown) is pressed, the setting unit 102 notifies the CPU 100 accordingly (step S400). Upon receiving the notification, the CPU 100 determines whether or not the ADF is connected to the image processing apparatus main body. Here, it is determined whether or not the ADF function can be used. If it is determined that the ADF is connected (YES in step S401), the CPU 100 further determines whether or not the image is read using the ADF (step S402). For example, a document detection sensor provided in the ADF is used to determine whether or not the image is read using the ADF. However, the present invention is not limited to this. The case where the image is not read using the ADF is a case where the image is read using a pressure plate.

  If it is determined in step S402 that the image is read using the ADF, the CPU 100 starts conveying the paper document using the ADF 200, and then operates the scanner 106 to start reading the image of the document (step S403). This is because it can be determined that the original is not a book original but an ordinary paper original.

  On the other hand, if it is determined in step S401 that the ADF is not connected (a pressure plate is connected), or if it is determined in step S402 that the image is not read using the ADF 200, a book frame erasure preview process is performed ( Step S404). Details of this processing will be described later. Thereafter, the image data of the document read in the book frame erasure preview process is subjected to predetermined image processing, and is printed out or converted into a file format such as PDF or TIFF according to the mode set by the user. Or transferred to other PCs.

  FIG. 4 is a flowchart showing details of the book frame erasure preview process in step S404 of FIG.

  In FIG. 4, the CPU 100 operates the scanner 106 to start reading an image of a document (step S500). After the image reading is started, the book document determination unit 107 determines whether or not the document read by the scanner 106 is a book document (step S501). Here, an example of a method for determining whether or not the document read by the scanner 106 is a book document will be described with reference to FIGS. 5 (a), 5 (b), and 5 (c).

  FIG. 5A is a side view of a state in which the book document 202 in a spread state is pressed against the contact glass 201 by the ADF (or pressure plate) 200.

  As shown in FIG. 5A, the center portion of the book document 202 in the spread state is contact glass 201 within the range of the arrow shown in the figure even if the user presses it with the ADF (or pressure plate) 200. It does not adhere to. In the image read by the scanner 106 in this state, as shown in FIG. 5B, a black belt is generated in the vertical direction in the center portion. In addition, a book frame generated by the edge of the page of the book document 202 surrounds the document image (characters in the illustrated example) in the image.

  Therefore, in order to determine whether or not there is a black belt at the center of the image read by the scanner 106, the CPU 100 first creates a histogram in the horizontal direction for the read image data for one page. An example of the created histogram is shown in FIG. In the illustrated histogram, the horizontal axis indicates the width of the image, and the vertical axis indicates the reading luminance (black reference). In the graph shown in FIG. 5, the upper value is closer to black (the luminance is lower), and the lower value is closer to white (the luminance is higher).

  Next, the CPU 100 analyzes the created histogram, determines a portion (between AB shown in the figure) exceeding a preset threshold TH as a black band, and detects the width AB of the black band. Then, the book document determination unit 107 determines whether the document is a book document from the center position of the document detected by pre-scanning the document in advance and the black band width AB.

  Returning to FIG. 4, when the book document determination unit 107 determines that the document is not a book document in step S501, the CPU 100 stores the read image data in the RAM 104 via the scanner control unit 105 and returns. . Thereafter, the read image data is subjected to predetermined image processing as described above.

  On the other hand, if the book document determination unit 107 determines that the document is a book document in step S501, the image processing unit 108 performs book frame erasure processing on the image read by the scanner 106 (step S502). In the book frame erasing process, the image processing unit 108 first identifies the above-described black band image portion having the width AB from the center portion of the image read by the scanner 106. Next, the image processing unit 108 enables the setting of the erasing range set in advance on the book frame erasing setting screen (for example, FIG. 7B) of the setting unit 102, and selects an image portion in the erasing range. Identify. As a result, an image portion other than the original image from the image read by the scanner 106 can be set as a deletion range candidate.

  Note that the erasure range set on the book frame erasure setting screen may be a default setting or a setting stored in the apparatus. This is because the setting can be changed in steps S505 to S507 described later. In addition, the erasing range that is enabled in step S502 may be, for example, only the erasing range set by the setting of the frame erasing width of “center” shown in FIG. It may be an erasing range set by setting the frame erasing width.

  In the present embodiment, the image portion specified by the book frame erasing process described above is subjected to a transparent process so that the erased portion can be seen slightly. At this stage, the black band is not erased and displayed, but the black band is left. Then, an image obtained by performing transmission processing on the black belt is displayed. At this time, the CPU 100 leaves the image data before the book frame erasure processing in the RAM 104 separately from the image data after the book frame erasure processing. FIG. 6A shows an image before the book frame erasing process is performed, and FIG. 6B shows an image after the book frame erasing process. In the image after the book frame erasing process is performed, the black belt at the center of the image and the book frame within the set erasure range are transparently erased. If the black band and the image portion within the erasure range are erased, when the preview image of the image with the book frame erased is displayed on the display unit 103, it is determined whether or not the book frame erase process has been performed. This is because it cannot be easily determined. In this way, the user can easily determine whether or not a desired book frame erase has been performed.

  Since the range of the image portion to be erased by the book frame erasure process may be changed by the user later, the original image data before the book frame erasure process is stored in the RAM 104 or the like without being erased. .

  Returning to FIG. 4, after step S <b> 502, the image processing unit 108 creates a preview image from the image after the book frame erasing process, and transmits the preview image to the display unit 103 to display the preview image (step S <b> 503). The user can determine in advance whether or not a desired book frame erase process has been performed by looking at the preview image displayed on the display unit 103 before printing out the image after the book frame erase process. . An example of the preview screen displayed on the display unit 103 is shown in FIG.

  In this embodiment, when the user gives an instruction to start reading an original without making any special settings, a preview image that has been subjected to book frame erasure processing automatically is displayed for a book original. On the other hand, there is a case in which a paper document reading instruction is given, but a book frame erasing process is performed without the user's intention and a preview is displayed. Therefore, the user can easily cancel the book frame erasing process by pressing (or selecting) the cancel button 802 on the preview screen shown in FIG.

  Specifically, the setting unit 102 determines whether or not the cancel button 802 is pressed on the preview screen displayed on the display unit 103 (step S504). When the cancel button 802 is pressed, the setting unit 102 notifies the CPU 100 to that effect. Upon receiving the notification, the CPU 100 determines that the document read by the scanner 106 is not a book document, and reads image data before the book frame erasing process from the RAM 104 or the like. Then, the image processing unit 108 creates a preview image from the read image before the book frame erasing process, and transmits it to the display unit 103 to display a preview screen (step S508).

  On the other hand, in step S504, if the setting unit 102 has not received an operation on the cancel button 802 on the preview screen, the CPU 100 determines that the document is a book document, and the image subjected to the book frame erasing process as it is. Is used.

  In this embodiment, when the user looks at the preview image after the book frame erase process and determines that the desired book frame erase process has not been performed, the erase range of the book frame erase (black band) to be erased by the book frame erase process. Image area and book frame erasure range). For example, when a thick book document is placed on the contact glass 201 in a double-page spread state, the float of the book document increases, and the width of the black belt generated in the center portion of the read image increases. As a result, the original image near the center of the two-page spread of the book document may overlap with the black belt. In such a case, as described above, if the black band image portion having the width AB generated at the center portion of the read image is automatically erased, the characters and images of the original that are not originally desired to be erased are black. There is a possibility of being erased together with the belt. Therefore, in the present embodiment, the configuration is such that the user can manually set the desired deletion range again.

  When the user wants to reset the erase range for book frame erasure, he presses a setting change button 801 on the preview screen. When the setting change button 801 is pressed (YES in step S505), the setting unit 102 notifies the CPU 100 accordingly. Upon receiving the notification, the CPU 100 creates a book frame erase setting screen for changing the setting of the erase range of the book frame erase as shown in FIG. The display unit 103 displays the received book frame erasure setting screen (step S506).

  In FIG. 7B, in setting the frame erase width, the erase range of the center frame erase at the center of the image and the frame erase range of the top, bottom, left, and right (all circumferences) can be set. The center frame eraser at the center of the image corresponds to the image portion of the black belt. Setting values are changed and set in the center frame erasing setting area 900 and the frame erasing setting area 901 in all the upper, lower, left, and right sides by a + -key 903 or a numeric keypad (not shown). Further, when the independent adjustment button 902 is pressed, it is possible to independently change the setting of the erase range for erasing the book frame at the top, bottom, left and right of the document image.

  In the center frame erasing setting area 900 and the all-frame erasing setting area 901 immediately after the setting change button 801 is selected, currently set values are displayed. Thereby, the user can know what is set in the current set value. The user can change / set the setting values in the center frame erase setting area 900 and the all-frame frame erase setting area 901 to set a new book frame erase erase range.

  Returning to FIG. 4, the display unit 103 that has received the setting of a desired erasure range from the user on the book frame erasure setting screen notifies the CPU 100 to that effect (step S506). The CPU 100 having received the notification uses the image data before the book frame erase process stored in the RAM 104 or the like to the image processing unit 108 based on the newly set erase range of the book frame erase. Control to perform book frame erasure processing. After that, the image processing unit 108 creates a preview image from the image that has been newly subjected to the book frame erasing process, and transmits it to the display unit 103 to display the preview image (step S507).

  Next, as a result of displaying the preview image, the portion that should not be erased originally has been erased, so the flow of preview image display when resetting the erase range of book frame erasing will be described.

  For example, FIG. 8A shows a part of the preview image after the book frame erasing process when the black band width AB (erasing range of the center frame erasing) is detected as 30 mm. In the illustrated example, the characters “o” and “ka” in the document are each half erased. If this is not done, the desired result cannot be obtained, so the setting value of the center frame erase width setting on the book frame erase setting screen shown in FIG. 7B is changed. For example, when the erase range of the center frame eraser, which was 30 mm, is changed to 12 mm, the new set value is immediately reflected in the preview image, and a preview image as shown in FIG. 8B is displayed. In the illustrated example, only the black belt is erased without erasing the characters “o” and “ka” that were erased in the initial setting.

  When the user who viewed the preview image of the image in which the erase range of the book frame erasure is reset by the above method is determined to be a desired image, the user presses the OK button 800 on the preview screen. As a result, the CPU 100 stores the image data after the book frame erasure processing in the RAM 104 or the like and returns.

  According to the above embodiment, even if the user is not particularly aware, when the book document is read, the preview image automatically erased by the book frame is displayed, and whether or not the image is a desired image before performing printout or the like. Can be confirmed. That is, before the user prints out the image on which the book frame erasing process has been performed, it can be easily confirmed whether or not the image has a desired finish.

  In the above-described embodiment, the embodiment has been described in which a preview image is displayed for each page (or first image reading) when reading a book document. If the setting value of the black band width and the erase range set on the book frame erase screen after the second page (second time) is the same as that of the previous page, it is possible to proceed to the subsequent processing without displaying the preview. I do not care. In this case, whether or not to display the preview may be switched under conditions such as when the width of the black band or the set value of the erasure range falls below a predetermined threshold. Further, the book frame deletion may be performed every predetermined number of readings (every predetermined number of pages). As a result, the load on the image processing apparatus can be reduced.

[Second Embodiment]
In the first embodiment, when the book original determination unit 107 determines whether the original read by the scanner 106 is a book original or not, a portion (black band) of the portion exceeding the threshold TH on the created histogram is displayed. A book original was determined from the relationship between the width AB and the center position of the original.

  The second embodiment is different from the first embodiment in that a distance measuring sensor provided on the ADF (or pressure plate) 200 is used to determine whether or not the document on the contact glass 201 is a book document. Otherwise, the rest is the same as in the first embodiment, and a description thereof will be omitted.

  FIG. 9A is an external view of a document reading table of an image processing apparatus according to the second embodiment of the present invention. FIG. 9B is a side view of a state in which a normal paper document is placed on the contact glass 201 and the ADF (or pressure plate) 200 is closed, and FIG. 9C is a book document 202 in a spread state. It is the figure which looked at the state pressed against contact glass 201 with ADF200 from the side.

  In FIG. 9A, the distance measuring sensor 203 is provided in the ADF 200 and measures the distance between the ADF 200 and the contact glass 201. The ADF 200 may be a pressure plate as long as it is an opening / closing means that can close and press the document placed on the document reading table from above.

  The distance measurement sensor 203 transmits the measured value to the book document determination unit 107 via the system bus. The book document determination unit 107 determines whether the document placed on the contact glass 201 is a book document based on the measurement value received from the distance measuring sensor 203.

  In the state shown in FIG. 9B, the distance between the contact glass 201 and the ADF 200 is closed without a gap, so the distance measured by the distance measuring sensor 203 is zero. In this case, the book document determination unit 107 determines that the document is not a book document but a paper document from the measurement value (= 0) received from the distance measuring sensor 203.

  On the other hand, in the state shown in FIG. 9C, the contact glass 201 and the ADF 200 cannot be closed without a gap, and floating occurs. The distance between the ADF 200 and the contact glass 201 is measured by the distance measuring sensor 203 and transmitted to the book document determination unit 107. In this case, the book document determination unit 107 determines that the document is a book document from the measurement value (≠ 0) received from the distance measuring sensor 203, and calculates the width of the black belt from the received measurement value. As a result, it is possible to determine an erasing range in the book frame erasing process. Subsequent processing is the same as in the first embodiment.

  According to the second embodiment, since it is not necessary to create a histogram from the read image, it takes less time to determine a book document, and a preview image can be displayed in real time.

  In the above embodiment, the case where the present invention is applied to the image processing apparatus has been described. However, the present invention is not limited to this, and the present invention may be applied to a system in which processing is performed by being connected to each other via a network such as a LAN or WAN. It goes without saying that can be applied.

  The present invention can also be realized by executing the following processing. That is, software (program) that realizes the functions of the above-described embodiments is supplied to a system or apparatus via a network or various storage media, and a computer (or CPU, MPU, or the like) of the system or apparatus reads the program. It is a process to be executed.

100 CPU
101 Operation Unit 106 Scanner 107 Book Document Determination Unit 108 Image Processing Unit 200 ADF (or Pressure Plate)
201 Contact glass 202 Book manuscript

Claims (12)

A document reading table;
An image reading hand stage reads the image of the document placed on the document reading table,
From the read image in the previous SL image reading means, specifying means for specifying the image portion of the black band of the image central portion,
Determining means for determining an image portion in a predetermined range overlapping the black belt as an erasure candidate;
A transmission processing unit that performs transmission processing of an image portion in a predetermined range determined by the determination unit in a state in which the image portion of the black belt specified by the specifying unit is left from the image read by the image reading unit;
Image processing means for creating a preview image based on the image after the transmission processing of the image portion within the predetermined range by the transmission processing means;
An image processing apparatus comprising: a control unit that controls to display a preview image created by the image processing unit on a display unit. The predetermined range includes a center frame at the center of the image generated when the image reading unit reads an image of a book document in a spread state placed on the document reading table as an image portion other than the document image, and the book document. the image processing apparatus according to claim 1, wherein the the page edge ranges arise all around frame. A setting unit for setting the predetermined range;
The setting means, wherein the predetermined range, the image processing apparatus according to claim 2, wherein setting the width of said part of the total circumference frame of the center frame. The specifying unit is an image processing apparatus according to any one of claims 1 to 3, characterized in that for detecting the width of the pre-Symbol black belt. Claim 1, characterized in that it comprises determining means for determining whether to erase after the preview display, the image portion of the predetermined range determined by the pre-Symbol determining means, from the image read by the image reading means 5. The image processing apparatus according to any one of items 4 to 4 . It said control means, the image processing apparatus according to any one of claims 1 to 5, characterized in that accept cancellation of transmission processing of an image portion of the predetermined range by said transmission processing means. Wherein the control unit receives a reconfiguration of the predetermined range by the setting unit, permeabilized a predetermined range the set again from the original image by said transmission processing means, said re-set predetermined range is permeabilized 7. The control unit according to claim 3, wherein a preview image is created by the image processing unit based on the later image , and the preview image is controlled to be displayed as a preview on the display unit. Image processing apparatus. An opening / closing means capable of pressing from above the document placed on the document reading table by closing;
Automatic document conveying means for conveying a sheet document one by one to the image reading position of the document reading table;
In the case of image reading using the automatic document feeder, it is determined that the document read by the image reading unit is not a book document, and in the case of image reading using the opening / closing unit, an image is read by the image reading unit. Determining means for determining that the read document is a book document;
The image processing apparatus according to claim 1, wherein when the determination unit determines that the document is a book document, the specification unit performs specification. An opening / closing means capable of pressing from above the document placed on the document reading table by closing;
Distance measuring means for measuring a distance between the opening / closing means and the document reading table ;
Based on measurements taken by the pre-Symbol distance measuring device, further comprising original read an image and a judgment means for judging whether book original by the image reading means,
Wherein if said document the judgment means judges that the book document, the image processing apparatus according to any one of claims 1 to 7, characterized in that the identification by said identification means is performed. After preview display is on the display means, when the image of the other document is read by the image reading means, the width of the detected black bars from the read image has been detected in the preview display immediately before If was less than the width the same as or a predetermined threshold value, said control means, without displaying a preview of the read image, the image processing apparatus according to claim 4, wherein the processing proceeds to subsequent processing. In a control method of an image processing apparatus comprising a document reading table and an image reading unit that reads an image of a document placed on the document reading table,
From the read image in the previous SL image reading means, a specifying step of specifying the image portion of the black band of the image central portion,
A determination step of determining an image portion in a predetermined range overlapping the black belt as an erasure candidate;
Transmission that performs transmission processing of an image portion within the predetermined range determined in the determination step while leaving the black band image portion specified in the specification step from the image read in the image reading step Processing steps;
An image processing step of creating a preview image based on the image after permeabilization of the image portion is in a predetermined range in said permeabilization step,
And a display step of displaying the preview image created in the image processing step. A computer-readable program for causing a computer to execute the control method of the image processing apparatus according to claim 11 .