JP2019149747A - Control program and image processing device - Google Patents

Abstract

To appropriately perform the rotation processing of an image based on scan data.SOLUTION: When generation of monochromatic-scale scan data is requested and execution of predetermined processing that requires the rotation processing of an image is required, a scan instruction instructing the generation of gray-scale scan data is output. Gray-scale scan data obtained according to the output of a scan instruction is subjected to the rotation processing of an image, and gray-scale scan data having been subjected to rotation processing is converted into binary scan data. Thus, by subjecting gray-scale scan data to the rotation processing of an image, time required for processing can be reduced and the rotation processing of an image can be appropriately performed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a computer-readable control program and the like of an image processing apparatus capable of executing image rotation processing based on scan data.

  As described in the following patent document, a technique for performing a rotation process for rotating an image based on scan data is known.

Japanese Patent Laid-Open No. 2006-63480

  It is an object of the present application to reduce the time required for image rotation processing based on scan data.

  In order to solve the above-described problem, a control program disclosed in an embodiment is a control program that can be read by a computer of an image processing apparatus including an operation unit, and the computer performs scan processing via the operation unit. The accepting means for accepting the set value, and the set value accepted by the accepting means are for requesting the creation of binary scan data and requesting the execution of a predetermined process that requires image rotation processing. In some cases, an instruction output unit that outputs a scan instruction for instructing the creation of grayscale scan data, and for the grayscale scan data acquired in response to the output of the scan instruction by the instruction output unit, the scan data First rotation processing execution means for executing image rotation processing based on the rotation, and rotation by the first rotation processing execution means Functioning as first conversion means for converting grayscale scan data subjected to processing into binary scan data, and output means for outputting binary scan data converted by the first conversion means It is characterized by making it.

  In order to solve the above problems, an image processing device disclosed in an embodiment is an image processing device including an operation unit and a control unit, and the control unit is configured to perform scan processing via the operation unit. The accepting means for accepting the set value, and the set value accepted by the accepting means are for requesting the creation of binary scan data and requesting the execution of a predetermined process that requires image rotation processing. In some cases, an instruction output unit that outputs a scan instruction for instructing the creation of grayscale scan data, and for the grayscale scan data acquired in response to the output of the scan instruction by the instruction output unit, the scan data First rotation processing execution means for executing image rotation processing based on the image, and grayscale scan that has been subjected to rotation processing by the first rotation processing execution means. The data are first converting means for converting the binary scan data, and output means for outputting the scan data of the converted binary by the first converting means, characterized in that to function with.

  In the control program and the image processing apparatus disclosed in the embodiment, when the creation of binary scan data is requested and the execution of a predetermined process requiring image rotation processing is requested, grayscale scan data A scan instruction for instructing the creation of the file is output. The grayscale scan data acquired in response to the output of the scan instruction is subjected to image rotation processing, and the grayscale scan data subjected to the rotation processing is converted into binary scan data. The In this way, by performing image rotation processing on grayscale scan data, it is possible to shorten the time required for processing, and image rotation processing can be suitably performed.

1 is a block diagram of a scan system 1. FIG. It is a figure which shows execution of a trimming process. It is a figure which shows execution of an addition process. It is a figure which shows execution of a size detection process. It is a figure which shows execution of the rotation process of the image based on the scan data of a monochrome scale. It is a figure which shows execution of the rotation process of the image based on the scan data of gray scale. 3 is a diagram illustrating a flowchart of a scanner driver 30. FIG. 3 is a diagram illustrating a flowchart of a scanner driver 30. FIG. 3 is a diagram illustrating a flowchart of a scanner driver 30. FIG. 3 is a diagram illustrating a flowchart of a scanner driver 30. FIG. 3 is a diagram illustrating a flowchart of a scanner driver 30. FIG. 3 is a diagram illustrating a flowchart of a scanner driver 30. FIG. 3 is a diagram illustrating a flowchart of a scanner driver 30. FIG.

<Configuration of scan system>
FIG. 1 shows a block diagram of a scan system 1 exemplified as an embodiment according to the present application. The scan system 1 includes a PC (an example of an image processing apparatus of the present invention) 10 and a scanner 50.

  The PC 10 mainly includes a CPU (an example of a computer and a control unit) 12, a memory 14, an LCD 16, an input I / F (an example of an operation unit) 18, and a network I / F 20. These components can communicate with each other via a bus 22.

  The PC 10 can communicate with the scanner 50 through the network I / F 20 and the network 52. As a communication system, for example, a wired LAN, USB, Wi-Fi (registered trademark), or Bluetooth (registered trademark) can be adopted. The scanner 50 transmits / receives various information and instruction signals to / from the PC 10 and creates scan data based on the control by the PC 10.

  The CPU 12 executes processing according to a scanner driver (an example of a control program) 30 and an application 32 in the memory 14. The scanner driver 30 is a device driver for the scanner 50 and controls the operation of the scanner 50. The application 32 is a program for executing arbitrary image processing on the scan data created by the scanner 50, for example, specifically, image editing software such as Adobe Photoshop (registered trademark). is there. Incidentally, the scanner driver 30 and the application 32 are programs according to the TWAIN standard, for example.

  In the following description, the CPU 12 that executes the scanner driver 30 or the like may be described simply by a program name. For example, the description “the scanner driver 30 is” may mean “the CPU 12 that executes the scanner driver 30 is”.

  The memory 14 also includes a data storage area (an example of a memory) 34. The data storage area 34 is an area for storing data necessary for execution of the scanner driver 30 and the like. Note that the memory 14 is configured by combining a RAM, a ROM, a flash memory, an HDD, a buffer included in the CPU 12, and the like.

  The memory 14 may be a computer readable storage medium. A computer-readable storage medium is a non-transitory medium. Non-transitory media include recording media such as CD-ROM and DVD-ROM in addition to the above examples. A non-transitory medium is also a tangible medium. On the other hand, an electrical signal that carries a program downloaded from a server on the Internet is a computer-readable signal medium that is a kind of computer-readable medium, but a non-transitory computer-readable storage. Not included in the media.

  The LCD 16 displays various functions of the PC 10. The input I / F 18 includes a keyboard, a mouse, and the like, and is an interface for inputting user operations.

<Operation of scan system>
In the description of the operation of the scan system 1 in this specification, the processing of the CPU 12 according to the instructions described in the program is basically shown. That is, processes such as “determination”, “extraction”, “selection”, “calculation”, “determination”, “specification”, “acquisition”, “acceptance”, “control”, and “setting” in the following description represent processes of the CPU 12. The processing by the CPU 12 includes hardware control via the OS 36. “Acquisition” is used in a concept that does not require a request. That is, the process that the CPU 12 receives data without request is also included in the concept of “the CPU 12 acquires data”. Further, “data” in this specification is represented by a bit string readable by a computer. Data having substantially the same semantic content but different formats are handled as the same data. The same applies to “information” in this specification. Further, processing such as “command”, “response”, and “request” is performed by communicating information indicating “command”, “response”, “request”, and the like. Further, words such as “command”, “response”, and “request” may be described in the meaning of information itself indicating “command”, “response”, “request”, and the like.

  In the scan system 1, normally, the PC 10 receives a setting value for scan processing via the input I / F 18, and a scan instruction according to the input setting value is transmitted to the scanner 50. As a result, a scan process according to the user's intention is executed. As setting values for scan processing set for the scan processing by the scanner 50 in the PC 10, setting values for trimming processing, setting values for adding processing, automatic document orientation correction processing (hereinafter referred to as “orientation correction processing”). There are setting values relating to the document size, setting values relating to the document size, setting values relating to the color scale of the scan data, setting values relating to the resolution of the scan data, and the like.

  The setting value related to the trimming process is a value that specifies whether or not to execute the process of removing an arbitrary edge portion of the image based on the scan data, and includes ON and OFF. Further, the setting value related to the trimming process includes information for designating a removal area from the image. This trimming process is a process composed of a process of rotating an image (hereinafter referred to as “rotation process”) and a process of removing a removal area from the image (hereinafter referred to as “removal process”). And is executed by the scanner driver 30.

  Specifically, as shown in FIG. 2A, a case will be described in which left and right regions (regions indicated by hatching) in the image 100 based on scan data are set as removal regions 102a and 102b. The scan data is composed of data for each line (dotted line 104) extending in the left-right direction. That is, the image data of the image 100 is composed of data in units of rows. Therefore, when the scanner driver 30 acquires the scan data from the scanner 50, the image data based on the scan data is rotated 90 degrees counterclockwise in order to trim the removal area 102 by removing the data in units of rows. Run. Thereby, as shown in FIG. 2B, in the image 110 rotated 90 degrees, the removal region 102a is located at the lower edge. At this time, the line-by-line image data indicating the removal area 102a is located at the end of the image data of the image 110. For this reason, the scanner driver 30 removes the image data of the line unit located at the end from the image data of the image 110. Thereby, the removal process which removes the removal area | region 102a from the image 110 is performed.

  Subsequently, the scanner driver 30 executes a rotation process for rotating the image from which the removal area 102a has been removed by 180 degrees counterclockwise. As a result, as shown in FIG. 2C, in the image 120 rotated by 180 degrees, the removal region 102b is positioned at the lower edge. At this time, line-by-line image data indicating the removal region 102b is located at the end of the image data of the image 120. For this reason, the scanner driver 30 removes the image data of the row unit located at the end from the image data of the image 120. As a result, a removal process for removing the removal region 102b from the image 120 is executed, and as shown in FIG. 2D, an image 130 from which the removal regions 102a and b have been removed is obtained from the image 100 based on the scan data. .

  Further, the setting value related to the addition process is a value that specifies whether or not to execute a process of adding a blank image to an arbitrary edge portion of an image based on scan data, and includes ON and OFF. In addition, the setting value related to the addition process includes information for designating a position where a blank image is added. This addition process is a process composed of a rotation process and a process for adding a blank image to an image based on scan data (hereinafter referred to as “addition process”), and is executed by the scanner driver 30. The

  Specifically, as shown in FIG. 3A, a case will be described in which an addition process for adding margin images 142a and 142b is set on the left and right edges of the image 140 based on the scan data. Also in this image 140, the scan data is composed of data for each line (dotted line 144) extending in the left-right direction. That is, the image data of the image 140 is composed of data in units of rows. Therefore, when the scanner driver 30 acquires the scan data from the scanner 50, the image driver 90 is rotated 90 degrees counterclockwise in order to add the margin image 142b as line-by-line data to the right edge of the image 140 based on the scan data. Executes rotation processing to rotate. As a result, as shown in FIG. 3B, in the image 150 rotated 90 degrees, the position where the margin image 142a is added becomes the lower edge. For this reason, the scanner driver 30 adds image data in units of lines of the margin image 142 a to the end of the image data of the image 150. Thereby, an addition process for adding the blank image 142a to the image 150 is executed.

  Subsequently, the scanner driver 30 executes a rotation process for rotating the image to which the margin image 142a is added by 180 degrees counterclockwise. As a result, as shown in FIG. 3C, in the image 160 rotated by 180 degrees, the position where the blank image 142b is added becomes the lower edge. For this reason, the scanner driver 30 adds image data in units of lines of the margin image 142b to the end of the image data of the image 160. As a result, an addition process for adding the margin image 142b to the image 160 is executed, and as shown in FIG. 3D, an image 170 in which the margin images 142a and 142b are added to the image 140 based on the scan data is obtained. .

  The setting value related to the orientation correction processing is a value that specifies whether or not to execute processing for automatically correcting the orientation of the image based on the scan data, and includes ON and OFF. This orientation correction process is a process composed of a character recognition process (hereinafter referred to as “OCR process”) and a rotation process, and is executed by the scanner driver 30.

  Specifically, when acquiring the scan data from the scanner 50, the scanner driver 30 specifies the direction of characters included in the image based on the scan data by OCR processing. Then, the scanner driver 30 performs a rotation process so that the orientation of the specified character becomes normal. That is, for example, when the orientation of characters included in the image based on the scan data is rotated 180 degrees in the vertical direction from the normal state, the scanner driver 30 rotates the image based on the scan data 180 degrees in the vertical direction. Perform rotation processing. Thereby, an image that is not inverted in the vertical direction is obtained.

  The setting value related to the document size is a value for specifying the size of the document to be scanned, and includes a manual setting and an automatic setting. In the manual setting, an arbitrary value is set by the user from the sheet sizes of normal cut sheets such as A4 and B5. Incidentally, the scanner 50 is a device that can scan a document of A4 size at the maximum. On the other hand, in the automatic setting, processing for automatically detecting the size of the document set on the scanner 50 (hereinafter referred to as “size detection processing”) is executed. This size detection process is a process composed of a process for specifying an area other than the original (hereinafter referred to as “external area”) and a trimming process, and is executed by the scanner driver 30.

  Specifically, a case where automatic setting is set as a setting value related to the document size, for example, a case where a B5 size document is set in the scanner 50 will be described. In such a case, the scanner driver 30 transmits to the scanner 50 a scan instruction in the maximum document size that can be scanned by the scanner 50, that is, an A4 size. Then, the scanner driver 30 acquires scan data of an A4 size document from the scanner 50.

  In the scanner 50, the document cover that holds the document from the back side is colored in a predetermined color on the reading table for reading the document. Therefore, in the image 200 based on the scan data, as shown in FIG. 4A, an image obtained by reading the color of the document cover around the image 202 corresponding to the document is an image outside the document (indicated by diagonal lines). Image 204). Therefore, the scanner driver 30 specifies the image data of the color colored on the document cover as the image data of the image 204 outside the document based on the scan data. Thereby, the area outside the document is specified.

  When the area outside the document is specified, the scanner driver 30 removes the image 204 in the area outside the document from the image 200 based on the scan data according to the same process as the trimming process described above. That is, as shown in FIG. 4B, in the image 200 based on the scan data, a part of the image 208 of the image 204 in the outside document area is located at the lower edge. At this time, line-by-line image data indicating the image 208 is located at the end of the image data of the image 200. For this reason, the scanner driver 30 removes the image data of the line unit located at the end from the image data of the image 200. Thereby, a removal process for removing a part of the image 208 of the image 204 in the outside-document area from the image 200 is executed.

  Next, the scanner driver 30 executes a rotation process for rotating the image from which the image 208 has been removed 90 degrees counterclockwise. As a result, as shown in FIG. 4C, in the image 210 rotated by 90 degrees, a part of the image 212 of the image 204 in the area outside the document is positioned at the lower edge. For this reason, the scanner driver 30 removes the image data of the line unit located at the end from the image data of the image 210. Thereby, a removal process for removing a part of the image 212 of the image 204 in the area outside the document from the image 210 is executed.

  Subsequently, the scanner driver 30 executes a rotation process for rotating the image from which the image 212 has been removed 90 degrees counterclockwise. As a result, as shown in FIG. 4D, in the image 216 rotated by 90 degrees, a part of the image 218 in the image 204 in the outside document area is positioned at the lower edge. For this reason, the scanner driver 30 removes the image data of the line unit located at the end from the image data of the image 216. As a result, a removal process for removing a part of the image 218 of the image 204 in the outside-document area from the image 216 is executed.

  Further, the scanner driver 30 executes a rotation process for rotating the image from which the image 218 has been removed 90 degrees counterclockwise. As a result, as shown in FIG. 4E, in the image 220 rotated by 90 degrees, a part of the image 222 of the image 204 in the area outside the document is positioned at the lower edge. For this reason, the scanner driver 30 removes the image data of the line unit located at the end from the image data of the image 220. As a result, a removal process for removing a part of the image 222 of the image 204 in the outside document area from the image 220 is executed. As shown in FIG. 4F, the image in the outside document area is obtained from the image 200 based on the scan data. An image 202 from which 204 is removed, that is, an image corresponding to a document is obtained.

  Further, the setting value related to the color scale of the scan data is a value indicating the number of colors that can be set for one pixel in the bitmap image data, and is a color scale of 24 bits (166777216 colors) and gray of 8 bits (256 colors). The scale is a monochrome scale of 1 bit (two colors: white and black). Further, the setting value relating to the resolution of the scan data is a value that specifies the reading accuracy at the time of the scan processing, and is 300 dpi, 500 dpi, or the like.

  Such setting values can be set for the scan processing by the scanner 50 in the PC 10. When various setting values are input through the input I / F 18 by a user operation, the scanner driver 30 receives the input various setting values, and issues a scan instruction according to the received various setting values. 50. However, depending on the color scale of the scan data, there are problems that the time required for the rotation process becomes long and the memory capacity in the rotation process is reduced. Therefore, when a specific process requiring a rotation process, that is, execution of a trimming process, a direction correction process, or the like is set, a scan instruction different from the input set value may be transmitted.

  Specifically, a rotation process for binary scan data, that is, monochrome scale scan data will be described first. In this description, a rotation process for rotating the image 300 shown in FIG. 5A by 90 degrees counterclockwise will be described. In FIG. 5, 1 枡 indicates 1 bit, and the image 300 illustrated in FIG. 5 is an image based on scan data of monochrome scale. Therefore, 1 枡, that is, 1 bit corresponds to 1 pixel. Further, the numbers for every square typically show image data. The rotation process for each pixel in the first row will be described.

  The processing in the PC 10 is generally executed in units of 1 byte, that is, in units of 8 bits. Therefore, in the rotation process for each pixel in the first row in the image 300, 8-bit, that is, 8-pixel image data is specified as shown in FIG. Then, image data of one pixel among the image data of eight pixels (here, image data of the pixel 302 at the left end) is specified. That is, in the monochrome scale scan data, one pixel is one bit. Therefore, when the PC 10 executes processing in units of 8 bits, first, image data of 8 pixels (8 bits) is specified. 1 pixel (1 bit) image data is specified. Thus, access to image data for each bit is generally called bit access.

  Next, as shown in FIG. 5C, the pixel to be moved by the rotation process, that is, the pixel 306 at the position where the pixel 302 is rotated 90 degrees counterclockwise around the center of the image 300, The image data of the pixel 302 is copied. Thereby, the rotation process for the image data of the pixel 302 is completed. Then, a rotation process similar to the rotation process for the image data of the pixel 302 is executed for the image data of each of the remaining seven pixels, whereby the rotation process for each pixel in the first row is completed. Furthermore, the rotation process for the image data of each pixel in the second and subsequent rows is executed in the same manner as the rotation process for the image data of each pixel in the first line, thereby rotating the image 300 by 90 degrees counterclockwise. An image 310 is obtained.

  Next, rotation processing for grayscale scan data will be described. In this description, a rotation process for rotating the image 320 shown in FIG. 6A by 90 degrees counterclockwise will be described. In FIG. 6, 1 枡 indicates 1 bit, and the image 320 illustrated in FIG. 6 is an image based on grayscale scan data. Therefore, 8 枡, that is, 8 bits form 1 pixel. The rotation process for each pixel in the first row will be described.

  By specifying the first 8 bits of the plurality of pixels in the first row, that is, 8１ image data, the leftmost pixel 322 is specified. In other words, since one pixel is 8 bits in grayscale scan data, image data of one pixel (8 bits) is specified without performing bit access by executing the processing of the PC 10 in units of 8 bits.

  Next, as shown in FIG. 6B, the pixel to be moved by the rotation process, that is, the pixel 326 at the position where the pixel 322 is rotated 90 degrees counterclockwise around the center of the image 320, The image data of the pixel 322 is copied. Thereby, the rotation process for the image data of the pixel 322 is completed. Then, a rotation process similar to the rotation process for the image data of the pixel 322 is performed on the image data of each of the remaining seven pixels, whereby the rotation process for each pixel in the first row is completed. Furthermore, the rotation process for the image data of each pixel in the second and subsequent rows is executed in the same manner as the rotation process for the image data of each pixel in the first line, thereby rotating the image 320 by 90 degrees counterclockwise. An image 330 is obtained.

  As described above, in the rotation process for the monochrome scale scan data, it is necessary to perform bit access, and in the rotation process for the gray scale scan data, it is not necessary to perform the bit access. In addition, the number of pixels constituting the image is very large. For this reason, if bit access is performed for each pixel, the time required for the rotation process becomes longer. In view of the above, the setting values of processing that requires rotation processing (hereinafter referred to as “required rotation processing”), that is, trimming processing, addition processing, orientation correction processing, and size detection processing are turned ON. In this case, the scanner driver 30 transmits a scan instruction in gray scale to the scanner 50 even if the setting value related to the color scale is set to the monochrome scale by the user setting.

  As a result, the scanner driver 30 receives the grayscale scan data, and executes the rotation required process based on the received grayscale scan data. That is, the scanner driver 30 executes any of trimming processing, adding processing, orientation correction processing, and size detection processing on grayscale scan data. As a result, it is possible to reduce the time required to execute the rotation required process including the rotation process. However, the setting value relating to the color scale is set to the monochrome scale by the user setting. That is, the user desires monochrome scale scan data. For this reason, after the rotation-required process is completed, the scanner driver 30 converts the gray scale scan data into monochrome scale scan data. Then, the scanner driver 30 outputs the scan data converted into the monochrome scale scan data to the application 32. Thereby, the processing by the scanner driver 30 is completed.

  However, as a matter of course, the gray scale scan data has a larger data amount than the monochrome scale scan data. For this reason, in a situation where the amount of data should be suppressed, it is preferable to execute rotation processing for monochrome scale scan data rather than rotation processing for gray scale scan data. Therefore, in a situation where the amount of data should be suppressed, the scanner driver 30 transmits a scan instruction in monochrome scale to the scanner 50 according to the user setting. In other words, even if the setting value for rotation required processing is set to ON and the setting value for the color scale is set to the monochrome scale, the scanner driver should 30 transmits a scan instruction in monochrome scale to the scanner 50 according to the user setting.

  Then, the scanner driver 30 receives the monochrome scale scan data, and executes a rotation required process based on the received monochrome scale scan data. As a result, the processing time cannot be shortened, but the data amount can be suppressed. It should be noted that there are two situations where the data amount should be suppressed: a case where the amount of scan data transmitted from the scanner 50 is assumed to be large, and a case where the free space of the PC 10 memory is small. For this reason, when the setting value of the scan processing by the user requests creation of scan data having a preset resolution or higher, and creation of scan data of a document having a preset size or more is requested. If it is, the scanner driver 30 transmits a scan instruction in monochrome scale to the scanner 50 on the assumption that the amount of scan data transmitted from the scanner 50 increases. When the free space in the data storage area 34 of the PC 10 is equal to or less than the set amount, the scanner driver 30 transmits a scan instruction in monochrome scale to the scanner 50.

  However, the OCR process needs to be performed in the orientation correction process, and the area outside the document needs to be specified in the size detection process. In the OCR process and the out-of-document detection process, there is a possibility that the processes cannot be appropriately executed based on the monochrome scale scan data. This is because the monochrome scale scan data has a small number of colors, so that it is difficult to detect characters and specify an area outside the document. For this reason, if the rotation-required processing is orientation correction processing and size detection processing, the scanner driver 30 does not issue a scan instruction in monochrome scale, but in grayscale even in a situation where the amount of data should be suppressed. A scan instruction is transmitted to the scanner 50. That is, the scanner driver 30 transmits a scan instruction in monochrome scale to the scanner 50 in a situation where the amount of data should be suppressed only when the rotation required processing is trimming processing and addition processing.

  Summarizing the above, even if the setting value for the trimming process or the appending process is set to ON and the setting value for the color scale is set to the monochrome scale, the data amount can be suppressed. Therefore, the scanner driver 30 transmits a scan instruction in monochrome scale to the scanner 50. Then, the scanner driver 30 receives the monochrome scale scan data, and executes trimming processing or addition processing based on the received monochrome scale scan data. Thereby, the amount of data can be suppressed. Note that the scan data on which the trimming process or the append process has been executed is a monochrome scale, and the user desires the monochrome scale scan data, and therefore it is not necessary to convert the color scale of the scan data. For this reason, when the scanner driver 30 executes the trimming process or the appending process, the scanner driver 30 outputs the scan data obtained by executing each process to the application 32. Thereby, the processing by the scanner driver 30 is completed.

  In addition, when the setting value for the orientation correction process or the size detection process is set to ON and the setting value for the color scale is set to the monochrome scale, the data amount should be suppressed. However, the scanner driver 30 transmits a grayscale scan instruction to the scanner 50. Then, the scanner driver 30 receives the grayscale scan data, and executes an OCR process or an area outside the original document based on the received grayscale scan data. As a result, the OCR process or the process for specifying the area outside the document can be appropriately executed.

  Then, after the OCR process or the document outside area specifying process is executed, the rotation process is executed in the orientation correction process, and the trimming process is executed in the size detection process. The rotation process and the trimming process can be executed on monochrome scale scan data unless the purpose is to reduce the processing speed. The purpose of the scanner driver 30 transmitting the grayscale scan instruction is to appropriately execute the OCR processing and the document outside area specifying processing, and not to reduce the processing speed. Furthermore, the PC 10 is in a situation where the amount of data should be suppressed.

  For this reason, when the scanner driver 30 executes the OCR process or the outside area specifying process, the scanner driver 30 converts the scan data in which each process is executed, that is, the gray scale scan data, into the monochrome scale scan data. Then, based on the monochrome scale scan data, the scanner driver 30 executes a rotation process if the required rotation process is a direction correction process, and executes a trimming process if the required rotation process is a size detection process. As a result, it is possible to suppress the data amount only during the period in which the rotation process or the trimming process is executed. Then, when the rotation process or the trimming process is executed, the scanner driver 30 outputs the scan data obtained by executing each process to the application 32. Thereby, the processing by the scanner driver 30 is completed.

  When the setting value of the rotation required process is OFF, the scanner driver 30 transmits a scan instruction according to the setting value to the scanner 50, and the same process as the process executed in the conventional scan system is executed. Is done. Even if the setting value for rotation required processing is ON, the scanner driver when the setting value related to the color scale is set to a scale other than the monochrome scale, that is, the color scale or the gray scale, by the user setting. 30 transmits a scan instruction according to the set value to the scanner 50, and the same processing as that executed in the conventional scanning system is executed.

<Scanner driver processing>
The above-described transmission of the scan instruction from the PC 10 to the scanner 50 and the execution of various processes on the scan data acquired in response to the transmission of the scan instruction are performed by the CPU 12 executing the scanner driver 30. Hereinafter, processing when the flow of the scanner driver 30 is executed will be described with reference to FIGS. 7 to 12. This process is a process executed when a user operation for instructing execution of a scan process is input after the scanner driver 30 is activated and a user operation related to scan process settings is input.

  First, the scanner driver 30 determines whether or not the setting value related to the rotation required process is set to ON (S100: refer to FIG. 7). At this time, if the setting value related to the rotation required process is set to OFF (S100: NO), the same process as the conventional process is executed (S102). Note that the conventional processing is to execute scan processing and perform image processing based on scan data in accordance with scan processing settings. Then, this flow ends.

  If the setting value related to the rotation required process is set to ON (S100: YES), the scanner driver 30 determines whether the setting value related to the color scale is set to the monochrome scale (S104). . At this time, when the setting value related to the color scale is set to other than the monochrome scale (S104: NO), the same processing as the conventional processing is executed (S102). Then, this flow ends.

  If the setting value related to the color scale is set to the monochrome scale (S104: YES), the scanner driver 30 determines whether or not the rotation required process is a direction correction process (S106). At this time, if the rotation required process is the direction correction process (S106: YES), the scanner driver 30 determines whether or not the data amount should be suppressed (S108). Then, when the data amount is not to be suppressed (S108: NO), a speed priority direction correction process execution subroutine is executed (S110).

  In the speed priority direction correction processing execution subroutine, the scanner driver 30 transmits a scan instruction in gray scale to the scanner 50 (S140: see FIG. 8). Then, the scanner driver 30 acquires grayscale scan data (S142). Subsequently, the scanner driver 30 executes OCR processing based on the grayscale scan data (S144). Then, the scanner driver 30 detects the direction of characters included in the image based on the scan data based on the processing result of the OCR processing (S146). Next, the scanner driver 30 executes a rotation process using the detected character direction (S148). Subsequently, the scanner driver 30 converts the grayscale scan data that has been subjected to the rotation processing into monochrome scale scan data (S150). Then, the scanner driver 30 outputs the scan data converted to the monochrome scale to the application 32 (S152). As a result, the speed priority direction correction processing execution subroutine ends, and this flow ends.

  In S108 (see FIG. 7), if the data amount should be suppressed (S108: YES), the memory priority direction correction processing execution subroutine is executed (S112). In the memory priority orientation correction processing execution subroutine, the scanner driver 30 transmits a scan instruction in gray scale to the scanner 50 (S160: see FIG. 9). The scanner driver 30 acquires grayscale scan data (S162). Subsequently, the scanner driver 30 executes OCR processing based on the grayscale scan data (S164). Then, the scanner driver 30 detects the direction of characters included in the image based on the scan data based on the processing result of the OCR process (S166). Next, the scanner driver 30 converts the grayscale scan data that has been subjected to the OCR processing into monochrome scale scan data (S168). Subsequently, the scanner driver 30 executes a rotation process using the character direction detected in S166 (S170). Then, the scanner driver 30 outputs the scan data subjected to the rotation process to the application 32 (S172). As a result, the memory priority direction correction processing execution subroutine ends, and this flow ends.

  When the required rotation process is not the orientation correction process in S106 (see FIG. 7) (S106: NO), the scanner driver 30 determines whether the required rotation process is a size detection process (S114). At this time, if the rotation required process is a size detection process (S114: YES), the scanner driver 30 determines whether or not the data amount should be suppressed (S116). Then, when the data amount is not to be suppressed (S116: NO), the speed priority size detection process execution subroutine is executed (S118).

  In the speed priority size detection process execution subroutine, the scanner driver 30 transmits a scan instruction in gray scale to the scanner 50 (S180: see FIG. 10). Then, the scanner driver 30 acquires grayscale scan data (S182). Subsequently, the scanner driver 30 executes a process for detecting an outside document area based on the grayscale scan data (S184). Then, the scanner driver 30 executes the trimming process based on the processing result of the outside-area detection process (S186). Subsequently, the scanner driver 30 converts the grayscale scan data subjected to the trimming processing into monochrome scale scan data (S190). Then, the scanner driver 30 outputs the scan data converted to the monochrome scale to the application 32 (S194). As a result, the speed priority size detection process execution subroutine ends, and this flow ends.

  In S116 (see FIG. 7), when the data amount should be suppressed (S116: YES), a memory priority size detection process execution subroutine is executed (S120). In the memory priority size detection process execution subroutine, the scanner driver 30 transmits a scan instruction in gray scale to the scanner 50 (S200: refer to FIG. 11). Then, the scanner driver 30 acquires grayscale scan data (S202). Subsequently, the scanner driver 30 executes a process for detecting an outside document area based on the grayscale scan data (S204). Then, the scanner driver 30 converts the grayscale scan data that has been subjected to the detection process of the area outside the document into monochrome scale scan data (S206). Next, the scanner driver 30 executes a trimming process based on the processing result of the outside-area detection process (S208). Then, the scanner driver 30 outputs the scan data subjected to the trimming process to the application 32 (S214). As a result, the memory priority size detection process execution subroutine ends, and this flow ends.

  When the rotation required process is not the size detection process in S114 (see FIG. 7) (S114: NO), the scanner driver 30 determines whether or not the data amount should be suppressed (S122). If the situation is not such that the data amount should be suppressed (S122: NO), the speed priority trimming or leg addition process execution subroutine is executed (S124).

  In the speed priority trimming or added leg processing execution subroutine, the scanner driver 30 transmits a scan instruction in gray scale to the scanner 50 (S220: see FIG. 12). Then, the scanner driver 30 acquires grayscale scan data (S222). Subsequently, the scanner driver 30 performs a trimming process or an adding process based on the grayscale scan data (S226). Then, the scanner driver 30 converts the grayscale scan data that has been subjected to the trimming process or the append process to monochrome scale scan data (S228). Then, the scanner driver 30 outputs the scan data converted to the monochrome scale to the application 32 (S230). As a result, the speed priority trimming or foot process execution subroutine ends, and this flow ends.

  Further, when the data amount is to be suppressed in S122 (see FIG. 7) (S122: YES), the memory priority trimming or adding process execution subroutine is executed (S126). In the memory priority trimming or added leg processing execution subroutine, the scanner driver 30 transmits a scan instruction in monochrome scale to the scanner 50 (S240: see FIG. 13). Then, the scanner driver 30 acquires monochrome scale scan data (S242). Subsequently, the scanner driver 30 performs a trimming process or an addition process based on the monochrome scale scan data (S246). Then, the scanner driver 30 outputs the monochrome scale scan data on which the trimming process or the add process has been executed to the application 32 (S248). As a result, the memory priority trimming or added leg processing execution subroutine ends, and this flow ends.

  The CPU 12 that executes S140, S160, S180, S200, S220, and S240 is an example of an instruction output unit. The CPU 12 that executes S148, S186, and S226 is an example of a first rotation processing execution unit. The CPU 12 that executes S150, S190, and S228 is an example of a first conversion unit. The CPU 12 that executes S152, S172, S194, S214, S230, and S248 is an example of an output unit. The CPU 12 that executes S164 and S204 is an example of a predetermined process execution unit. The CPU 12 that executes S168 and S206 is an example of a second conversion unit. The CPU 12 that executes S170 and S208 is an example of third rotation processing execution means. The CPU 12 that executes S246 is an example of a second rotation processing execution unit.

  The present invention is not limited to the above-described embodiment, and can be implemented in various modes with various changes and improvements based on the knowledge of those skilled in the art. Specifically, for example, in the above embodiment, the PC 10 receives a scan process setting value and the PC 10 outputs a scan instruction to the scanner 50. However, the scanner 50 receives the scan process setting value, and the scanner 50 The scanner 50 may execute a scan process according to the scan instruction.

  In the above embodiment, the example in which the processing shown in FIGS. 7 to 13 is executed by the CPU 12 has been described. However, the processing is not limited to the CPU 12, and may be executed by an ASIC or other logical integrated circuit. These processes may be executed by cooperation of a CPU or the like, an ASIC, or another logic integrated circuit.

  10: PC, 12: CPU, 18: input I / F, 30: scanner driver, 50: scanner

Claims (7)

A control program readable by a computer of an image processing apparatus including an operation unit,
The computer,
An accepting means for accepting a setting value for scan processing via the operation unit;
When the set value received by the accepting unit requests the creation of binary scan data and requests the execution of a predetermined process that requires image rotation processing, a grayscale scan is performed. Instruction output means for outputting a scan instruction for instructing creation of data;
First rotation processing execution means for executing rotation processing of an image based on the scan data for grayscale scan data acquired in response to the output of the scan instruction by the instruction output means;
First conversion means for converting grayscale scan data that has been subjected to rotation processing by the first rotation processing execution means into binary scan data;
Output means for outputting binary scan data converted by the first conversion means;
A control program characterized by functioning as a function. The first rotation processing execution means includes
The control program according to claim 1, wherein the image rotation processing based on the scan data is executed by copying the data for each pixel capacity included in the grayscale scan data. The instruction output means includes
Even if the setting value received by the receiving unit is a request for creating binary scan data and requesting the execution of the predetermined process, the receiving unit has received the setting value. At least one of requesting the creation of scan data having a set value greater than or equal to a preset set resolution and requesting creation of scan data of a document having a preset size or larger A scan instruction to instruct the creation of binary scan data,
The computer,
Second rotation processing execution means for executing image rotation processing based on the scan data for binary scan data acquired in response to the output of the scan instruction by the instruction output means;
To function,
The output means includes
The control program according to claim 1 or 2, wherein binary scan data that has been subjected to rotation processing by the second rotation processing execution means is output. The instruction output means includes
Even if the setting value received by the receiving unit is a request for creating binary scan data and a request for executing the predetermined process, the memory of the image processing apparatus A scan instruction that instructs the creation of binary scan data is output on condition that the free space of
The computer,
Second rotation processing execution means for executing image rotation processing based on the scan data for binary scan data acquired in response to the output of the scan instruction by the instruction output means;
To function,
The output means includes
The control program according to claim 1 or 2, wherein binary scan data that has been subjected to rotation processing by the second rotation processing execution means is output. The setting value received by the receiving means is for requesting creation of scan data having a preset resolution or higher, and requesting for creation of scan data of a document having a preset size or more. Subject to at least one of being,
The computer,
Predetermined process execution means for executing the predetermined process on grayscale scan data acquired in response to the output of a scan instruction by the instruction output means;
Second conversion means for converting grayscale scan data that has been processed by the predetermined process execution means into binary scan data;
Third rotation processing execution means for executing, on the binary scan data converted by the second conversion means, image rotation processing based on the scan data;
To function,
The output means includes
The control program according to claim 1 or 2, wherein binary scan data that has been subjected to rotation processing by the third rotation processing execution means is output. On condition that the free space of the memory of the image processing apparatus is not more than a set amount,
The computer,
Predetermined process execution means for executing the predetermined process on grayscale scan data acquired in response to the output of a scan instruction by the instruction output means;
Second conversion means for converting grayscale scan data that has been processed by the predetermined process execution means into binary scan data;
Third rotation processing execution means for executing, on the binary scan data converted by the second conversion means, image rotation processing based on the scan data;
To function,
The output means includes
The control program according to claim 1 or 2, wherein binary scan data that has been subjected to rotation processing by the third rotation processing execution means is output. An operation unit;
A control unit;
An image processing apparatus comprising:
The control unit
An accepting means for accepting a setting value for scan processing via the operation unit;
When the set value received by the accepting unit requests the creation of binary scan data and requests the execution of a predetermined process that requires image rotation processing, a grayscale scan is performed. Instruction output means for outputting a scan instruction for instructing creation of data;
First rotation processing execution means for executing rotation processing of an image based on the scan data for grayscale scan data acquired in response to the output of the scan instruction by the instruction output means;
First conversion means for converting grayscale scan data that has been subjected to rotation processing by the first rotation processing execution means into binary scan data;
Output means for outputting binary scan data converted by the first conversion means;
An image processing apparatus characterized in that the image processing apparatus functions.

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