JP2020014123A - Image processing apparatus and program - Google Patents

Abstract

To provide an image processing apparatus and a program that can detect the positional deviation of a document in a shorter time than that of a configuration in which after a document is scanned from end to end, the positional deviation of the document can be ensured.SOLUTION: An image processing apparatus comprises: reading control means that controls a reading device to acquire an image obtained by reading a partial area in a reading area; and notification means that, when a deviation amount indicating the positional deviation of an object to be read included in the image with respect to the reading area exceeds a predetermined reference value, notifies that positional deviation is detected.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an image processing device and a program.

  2. Description of the Related Art In recent years, there has been proposed an image processing apparatus capable of visually recognizing a set state of a document with a platen cover closed (for example, see Patent Document 1).

  The image processing apparatus described in Patent Document 1 includes a platen on which a document is placed, an image sensor provided below the platen and reading the document while scanning, a platen cover that covers the document on the platen, And the platen cover is made of a transparent material and a light control sheet member.

JP 2009-55286 A

  SUMMARY OF THE INVENTION It is an object of the present invention to provide an image processing apparatus and a program capable of confirming a positional deviation of a document in a shorter time than a configuration capable of confirming a positional deviation of the document after scanning from the end of the document. .

[1] reading control means for controlling a reading device to obtain an image obtained by reading a partial area in a reading area;
Notification means for notifying that a position shift has been detected when a shift amount indicating a position shift amount of the read target included in the image with respect to the reading area exceeds a predetermined reference value. Image processing device.
[2] the reading control means acquires the image by scanning a predetermined distance from an end of the reading area in the sub-scanning direction of the reading area;
The image processing device according to the above [1].
[3] The notifying means is provided when the distance between one side of the reading target in the sub-scanning direction on which scanning is started and the end of the reading area exceeds a predetermined reference distance. , Notifying that a displacement has been detected,
The image processing device according to [2].
[4] The notifying unit notifies that a positional shift has been detected when the inclination of the one side of the reading object with respect to the end of the reading area exceeds an angle that is a predetermined reference. ,
The image processing device according to the above [2] or [3].
[5] When the image includes the reading target, the image processing apparatus further includes display control means for controlling display of the image.
The image processing device according to any one of [1] to [4].
[6] The display control means controls to sequentially display the images acquired by the reading control means in the order of acquisition.
The image processing device according to the above [5].
[7] Computer
Reading control means for controlling the reading device to obtain an image obtained by reading a partial area in the reading area;
A notification unit configured to notify that a positional shift has been detected when a shift amount indicating a positional shift amount of the read target included in the image with respect to the reading area exceeds a predetermined reference value;
Program to function as

According to the first, second, and seventh aspects of the present invention, it is possible to confirm the positional deviation of the original in a shorter time than the configuration in which the positional deviation of the original can be confirmed after scanning from one end of the original to another.
According to the third aspect of the present invention, it is possible to detect a displacement based on the distance between the document and the reading area.
According to the fourth aspect of the present invention, it is possible to detect a displacement based on the inclination of the document with respect to the reading area.
According to the fifth aspect of the present invention, it is possible to visually display the arrangement state of the document to the user.
According to the invention of claim 6, it is possible to visually display the arrangement state of the document to the user in real time.

FIG. 1 is a block diagram illustrating an example of a control system of the image processing apparatus according to the embodiment of the present invention. FIG. 2 is a schematic diagram illustrating an example of a configuration of the image reading unit. FIGS. 3A and 3B are diagrams illustrating an example of the arrangement of a document. FIG. 3A is a diagram illustrating an example in which the document is not misaligned. FIG. 3B is a diagram illustrating an example in which the document is misaligned. It is. FIG. 4 is a flowchart illustrating an example of the operation of the image processing apparatus illustrated in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In each of the drawings, components having substantially the same function are denoted by the same reference numerals, and redundant description is omitted.

[Summary of Embodiment]
The image processing apparatus according to the present embodiment controls a reading device to obtain an image obtained by reading a partial area in a reading area, and a reading control section for reading the reading area included in the image. And a notifying unit for notifying that the position shift has been detected when the shift amount indicating the position shift amount exceeds a predetermined reference value.

[Embodiment]
FIG. 1 is a block diagram illustrating an example of a control system of the image processing apparatus according to the embodiment of the present invention. The image processing apparatus 2 corresponds to, for example, a scanner or a multifunction peripheral having a scan function. The image processing apparatus 2 includes a control unit 20 that controls each unit, a storage unit 21 that stores various data, an operation display unit 22 that inputs and displays information, and an image that reads a document and obtains a read image. A reading unit 24; The read image is an example of an image. The image reading unit 24 is an example of a reading device.

  The control unit 20 includes a CPU (Central Processing Unit), an interface, and the like. The CPU functions as the cover detection unit 200, the reading unit 202, the reading control unit 203, the image processing unit 204, the display control unit 206, the warning unit 207, and the like by operating according to the program 210 recorded in the storage unit 21. The display control unit 206 and the warning unit 207 are examples of a notification unit. Details of each means will be described later.

  The storage unit 21 includes a read only memory (ROM), a random access memory (RAM), a hard disk, and the like, and stores various data such as a program 210, distance information 211, and determination information 212.

  The distance information 211 is information indicating a moving distance (scanning distance) of the measurement system when the document 240 (see FIG. 2) is temporarily read. The document 240 is an example of a reading target. The distance information 211 may be given by actual dimensions such as mm or cm, or may be given by a value indicating a ratio to the reading area 243 (see FIG. 2).

  The determination information 212 is information serving as a reference for determining a positional shift of the document 240 (hereinafter, also simply referred to as “positional shift”). Details of the distance information 211 and the determination information 212 will be described later. The determination information 212 is an example of a predetermined reference value.

  The operation display unit 22 is, for example, a touch panel display, and has a configuration in which a touch panel is arranged on a display such as a liquid crystal display.

  FIG. 2 is a schematic diagram illustrating an example of the configuration of the image reading unit 24. The image reading section 24 has an upper surface formed of a platen glass or the like that supports the original 240 and has a substantially rectangular parallelepiped-shaped original table 242 and a cover section 244 that covers a reading area 243 on the original table 242. (Hereinafter, also referred to as “platen cover 244”). The platen cover 244 may be attached to the short side of the document table 242 as shown in FIG. 2, or may be attached to the long side.

  The image reading section 24 optically reads a document 240 arranged on a document table 242. A known technique may be used as a method of reading the document 240.

  For example, a light source in which light-emitting elements that emit white light, such as LEDs and lamps, are arranged in a line, a mirror that controls light rays emitted from the light source, a lens that collects the light rays, and a light that is reflected from a document. A measuring system (not shown) including an optical sensor such as a CCD (Charge Coupled Device) sensor or a COS (Complementary Metal Oxide Semiconductor) sensor for receiving light, and a motor for moving the measuring system are provided, and the measuring system is specified. The document 240 is moved in the direction (for example, the longitudinal direction of the document table 242) to read the document 240 to obtain a read image.

  Next, details of each means constituting the control unit 20 will be described with reference to FIG. FIGS. 3A and 3B are diagrams illustrating an example of the arrangement of a document. FIG. 3A is a diagram illustrating an example in which the document is not misaligned. FIG. 3B is a diagram illustrating an example in which the document is misaligned. It is. Hereinafter, the vertical direction in FIG. 3 is also referred to as a main scanning direction, and the horizontal direction in the drawing is also referred to as a sub-scanning direction.

  The cover detecting means 200 detects that the platen cover 244 has been closed. The closing of the platen cover 244 may be performed by using a known technique, for example, a contact or optical cover open / close detection sensor (not shown).

  The reading unit 202 controls the above-described measurement system to read the document 240 arranged on the document table 242 and obtain image data (hereinafter, also referred to as a “read image”) of the document 240.

  When the cover detection unit 200 detects that the platen cover 244 is closed, the reading control unit 203 determines a predetermined partial area in the reading area 243 (see “R” in FIG. 3A). The reading unit 202 is controlled so as to read. The “specific range” refers to a partial area set in the reading area 243 and subjected to primary reading of the document 240.

  The specific range R is formed at an end of the reading area 243 on the side where scanning is started in the sub-scanning direction (one side on the left side in the drawing, hereinafter, also simply referred to as “end of the reading area 243”). Preferably, the specific range R includes the leading end 241 of the document 240 on the platen cover 244 side.

  Specifically, the specific range R is a rectangular area in which one side 243a which is an end of the reading area 243 on the platen cover 244 side is a long side, and a pair of sides orthogonal to the one side 243a is a short side. is there. The length of the short side is specified by the distance information 211 stored in the storage unit 21. The short side is, for example, several cm. The length of the short side is an example of a predetermined distance.

  The reading unit 202 described above is controlled by the reading control unit 203, and reads a specific range R to acquire a read image. In the following description, when it is necessary to specify a read image obtained by reading the specific range R only by the reading unit 202 from a read image obtained by reading the entire reading area 243, a specific A read image obtained by reading only the range R is also referred to as a “preview image”.

  When reading the specific range R, the reading unit 202 may read at a certain resolution or less. Further, even when the color mode is set as one of the conditions for reading the document 240, the reading unit 202 may read in the monochrome (black and white) mode when reading the specific range R.

  The image processing unit 204 performs image processing on the preview image acquired by the reading unit 202, and detects a displacement of the document 240. The “position shift” detected by the image processing unit 204 includes the following.

(1) The image of the document 240 is separated from the edge of the reading area 243 by a predetermined distance or more, specifically, one side 240a (hereinafter, referred to as one side) of the image of the document 240 on which scanning starts in the sub-scanning direction. The “side 240 a of the original 240” is fixed from the side 243 a of the reading area 243 on which scanning starts in the sub-scanning direction (hereinafter, also simply referred to as “the one side 243 a of the reading area 243”). Be more than a distance (see "d" in FIG. 3B).

(2) The image of the rectangular document 240 is arranged to be inclined at a certain angle or more with respect to the reading area 243, specifically, one side 240 a of the document 240 is positioned with respect to one side 243 a of the reading area 243. Incline by a certain angle (see “θ” in FIG. 3B).

  A well-known method may be used for detecting the above-mentioned position shift. For example, the image processing unit 204 detects an image of the document 240 from the preview image, acquires position information indicating a position of the detected image of the document 240 in the reading area 243, and detects a position shift based on the acquired position information. I do. In the following description, “image” is omitted, and the image of the document 240 is also simply referred to as “document 240”.

  More specifically, the image processing unit 204 extracts the outline of the document 240 by detecting an edge (also referred to as an “edge”) of the document 240 from the preview image acquired by the reading unit 202.

  Next, the image processing unit 204 obtains a distance d between the contour line and one side 243a of the reading region 243 and an inclination angle θ of the contour line with respect to the one side 243a from the position in the reading region 243 of the contour line. . The distance d and the angle θ are examples of the shift amount indicating the shift amount.

  Next, the image processing unit 204 detects the positional deviation of the document 240 by comparing the distance d and the angle θ with the above-described determination information 212 previously stored in the storage unit 21 as the determination information 212. That is, when the obtained distance d and angle θ are equal to or greater than the distance and angle recorded in the determination information 212 of the storage unit 21, the image processing unit 204 determines that the original 240 has been misaligned. The distance recorded in the determination information 212 is an example of a predetermined reference distance, and the angle recorded in the determination information 212 is an example of a predetermined reference angle.

  Note that, for example, the image processing unit 204 may detect two corners of the document 240 on the platen cover 244 side, and obtain the angle θ of the document 240 based on a time difference when the two corners are detected.

  The display control unit 206 controls to display the read image acquired by the reading unit 202 on the display surface of the operation display unit 22.

  When the image processing unit 204 detects the positional deviation of the document 240, the warning unit 207 uses a sound (alarm or buzzer), sound, lighting of an LED, or the like to indicate that the positional deviation has occurred (error message). ) Is output. At this time, the display control unit 206 may perform control to further display an error message indicating that the position shift has occurred on the display surface of the operation display unit 22.

(Operation of the embodiment)
Next, an example of the operation of the image processing apparatus 2 will be described with reference to FIG. FIG. 4 is a flowchart illustrating an example of the operation of the image processing apparatus 2. When the operator places the document 240 on the document table 242 and closes the platen cover 244, the cover detection unit 200 detects that the platen cover 244 is closed (S1).

  When it is detected that the platen cover 244 is closed (S1: Yes), the reading control unit 203 controls the reading unit 202 to read a specific range R (see FIG. 3) in the reading area 243. The reading unit 202 reads a specific range R based on the control of the reading control unit 203, and acquires a preview image (S2).

  The display control unit 206 controls the preview image read by the reading unit 202 to be displayed on the display surface of the operation display unit 22 (S3).

  Further, the image processing unit 204 performs image processing on the preview image, and detects a displacement of the document 240 (S4). If the document 240 is misaligned (S4: Yes), the warning unit 207 outputs a warning (S5). Further, the display control unit 206 controls to display a warning on the display surface of the operation display unit 22.

  The above four steps S2 to S5 are performed until an operation for instructing the operation display unit 22 to start scanning of the entire reading area 243 (for example, an operation on a scan start button) is performed (S6: No). It is done repeatedly.

  When an operation for instructing to start scanning the entire reading area 243 is performed (S6: Yes), the reading unit 202 reads the document 240 over the entire reading area 243 (S7). The display control unit 206 controls to display the read image on the display surface of the operation display unit 22 (S8).

  According to the above-described configuration, it is possible to confirm the positional deviation of the document in a shorter time than the configuration in which the positional deviation of the document can be confirmed after scanning from end to end of the document. Note that “the end to the end of the document” refers to a side existing at an end to be read and an end of a side existing in parallel with the side.

  Further, according to the present invention, for example, when the operator closes the platen cover 244 and the document 240 is displaced, the arrangement state of the document 240 cannot be visually recognized after the platen cover 244 is closed. Even when the positional deviation of the original 240 is confirmed through the preview image, the positional deviation can be determined based on the preview image obtained by reading only a part of the reading area 243. Compared with the conventional technique of reading and generating an image for preview, to reduce the time required for a series of operations for confirming misalignment and re-opening the platen cover and re-arranging the original 240 when misalignment has occurred. Can be.

<Modification 1>
In the above embodiment, the length of the short side of the specific region R is fixedly determined using the distance information 211 stored in the storage unit 21, but may be a value that varies according to the document 240.

  For example, the line-by-line data acquired by the image processing unit 204 is sequentially processed (that is, image processing is performed in real time), and when one side 240a of the document 240 on the platen cover 244 side is detected, the reading control unit 203 reads the original. The reading may be stopped by controlling the means 202.

  If the image processing unit 204 does not detect the document 240, the warning unit 207 may output a warning message indicating that the document 240 is not placed.

<Modification 2>
Further, the specific area R is not limited to the end of the reading area 243, and may be set to be wide. For example, the length of the short side of the specific region R may be set to about one half of the long side of the document table 242 or the like. In this way, for example, when scanning a three-dimensional object such as a booklet, a portion not in contact with the document table 242, such as a spelling part (throat) located at the center of the object, can be used as a scanned image. Even when the shadow is reflected and the expected scan data cannot be obtained, it is possible to generate a preview image that can confirm whether or not the shadow is included without reading the entire reading area 243.

  As described above, the embodiments of the present invention have been described. However, the embodiments of the present invention are not limited to the above embodiments, and various modifications and implementations are possible without changing the gist of the present invention. is there. For example, execution of various processes may be instructed from a terminal device connected to the image processing apparatus 2 via a network. Further, in the above-described embodiment, the configuration in which the image processing apparatus 2 includes the image reading unit 24 has been described as an example. However, a configuration in which the reading apparatus is provided outside may be employed.

  Each unit of the control unit 20 may be partially or entirely configured by a hardware circuit such as a reconfigurable circuit (FPGA: Field Programmable Gate Array) or an application specific integrated circuit (ASIC: Application Specific Integrated Circuit). Good.

  Further, some components of the above-described embodiment can be omitted or changed without departing from the scope of the present invention. In addition, steps can be added, deleted, changed, replaced, and the like in the flow of the above-described embodiment without changing the gist of the present invention. Further, the program used in the above embodiment can be provided by being recorded on a computer-readable recording medium such as a CD-ROM, stored in an external server such as a cloud server, and used via a network. You can also.

2 Image processing device 20 Control unit 21 Storage unit 22 Operation display unit 24 Image reading unit 200 Cover detection unit 202 Reading unit 203 Reading control unit 204 Image processing unit 206 Display control unit 207 Warning unit 210 Program 211 Distance information 212 Judgment information 240 Document 240a one side 241 tip 242 platen 243 reading area 243a one side 244 lid (platen cover)

Claims (7)

Reading control means for controlling the reading device to obtain an image obtained by reading a partial area in the reading area;
Notification means for notifying that a positional shift has been detected when a shift amount indicating a positional shift amount of the read target included in the image with respect to the reading area exceeds a predetermined reference value. Image processing device. The reading control means acquires the image by scanning a predetermined distance from an end of the reading area in the sub-scanning direction of the reading area,
The image processing device according to claim 1. The notifying unit, when the distance between one side of the reading target in the sub-scanning direction where scanning starts and the end of the reading area exceeds a predetermined reference distance, Notify that deviation has been detected,
The image processing device according to claim 2. The notifying unit, when the inclination of the one side of the reading object with respect to the end of the reading area exceeds an angle serving as a predetermined reference, notifies that a position shift has been detected.
The image processing device according to claim 2. When the image includes the reading target, the image processing apparatus further includes a display control unit configured to control to display the image.
The image processing device according to claim 1. The display control means controls to sequentially display the images obtained by the reading control means in the order in which the images were obtained,
The image processing device according to claim 5. Computer
Reading control means for controlling the reading device to obtain an image obtained by reading a partial area in the reading area;
A notification unit that notifies that a position shift has been detected, when a shift amount indicating a shift amount of the position of the read target included in the image with respect to the reading area exceeds a predetermined reference value;
Program to function as