JP2021132283A - Medium conveyance device, image processing system, control method, and control program - Google Patents

Abstract

To provide a medium conveyance device, an image processing system, a control method, and a control program, capable of correcting an input image in which abnormality exists in a shorter period of time.SOLUTION: An image processing system 1 includes: a plurality of sensors 111, 112 for detecting floating at a plurality of parts of a medium mounted on a mounting table 103; a floating determination unit 153 that on the basis of output signals from the plurality of sensors, determines whether or not floating of the medium is generated at any of the plurality of parts; and an image generation unit 152 for generating an input image in which the medium is captured. Any of a medium conveyance device and an information processing device includes: an abnormality determination unit for determining whether or not abnormality exists in the input image's region including a part at which generation of floating of the medium is determined by the floating determination unit; and a correction unit for correcting image information in the input image's region in which existence of abnormality is determined by the abnormality determination unit.SELECTED DRAWING: Figure 14

Description

The present invention relates to a medium transport device, an image processing system, a control method and a control program, and more particularly to a medium transport device, an image processing system, a control method and a control program that captures a medium and generates an input image.

A medium transporting device such as a scanner transports a medium such as a document, reads the transported medium, and generates an input image. In such a medium transport device, if the medium is not properly transported, there is a possibility that an abnormality exists in the input image. In the medium transport device, when an abnormality is present in the input image, it is desired to appropriately correct the input image.

A check processing device that is installed apart from each other in the check transport direction, includes two image sensors that read the image of the check, transports the check in the transport direction at a preset speed, and passes the two image sensors is disclosed. (See Patent Document 1). This check processing device detects the transport speed when the check actually passes through the two image sensors, and expands and contracts and corrects the scanned image based on the difference between the detected transport speed and the set speed.

Japanese Unexamined Patent Publication No. 2010-135964

In the medium transfer device, it is desired that the input image in which an abnormality exists can be corrected in a shorter time.

An object of the present invention is to provide a medium transport device, an image processing system, a control method, and a control program capable of correcting an input image in which an abnormality exists in a shorter time.

The medium transporting device according to one aspect of the present invention has a mounting table on which the medium is placed, a transporting section for transporting the medium mounted on the mounting table, and a plurality of parts of the medium mounted on the mounting table. Based on a plurality of sensors for detection and output signals from the plurality of sensors, a lift determination unit for determining whether or not the medium is lifted in any part of the plurality of parts, and a transport unit for transporting. Whether or not there is an abnormality in the region of the input image including the image generation unit that generates the input image in which the captured medium is captured and the portion that is determined by the lift determination unit that the medium is lifted. It has an abnormality determination unit for determining the above, and a correction unit for correcting image information in the region of the input image determined by the abnormality determination unit to have an abnormality.

The image processing system according to one aspect of the present invention is an image processing system having a medium transfer device and an information processing device, and the medium transfer device is mounted on a mounting table on which a medium is placed and a mounting table. A transport unit that transports the image, a plurality of sensors for detecting the floating of a plurality of parts of the medium mounted on the mounting table, and any part of the plurality of parts based on output signals from the plurality of sensors. It has a floating determination unit for determining whether or not the medium has been lifted, and an image generation unit for generating an input image in which the medium transported by the transport unit is captured, and has a medium transport device or information processing. An abnormality determination unit that determines whether or not an abnormality exists in the area of the input image including a portion of the device that is determined by the floating determination unit that the medium has been lifted, and an abnormality determination unit. It has a correction unit for correcting image information in the area of the input image determined to have an abnormality.

Further, in the control method according to one aspect of the present invention, a mounting table on which the medium is placed, a transport unit for transporting the medium mounted on the mounting table, and a plurality of parts of the medium mounted on the mounting table are lifted. It is a control method of an image processing system having a plurality of sensors for detecting the above and a medium transporting device having the same. It is determined whether or not it has occurred, an input image in which the medium conveyed by the conveying unit is captured is generated, and an abnormality is found in the area of the input image including the portion where the floating of the medium is determined to occur. Is determined, and the image information in the area of the input image determined to be abnormal is corrected.

Further, in the control program according to one aspect of the present invention, a mounting table on which the medium is placed, a transporting unit for transporting the medium mounted on the mounting table, and a plurality of parts of the medium mounted on the mounting table are lifted. It is a control program of a medium transporting device having a plurality of sensors for detecting the above, and whether or not the floating of the medium occurs in any part of the plurality of parts based on the output signals from the plurality of sensors. Whether or not there is an abnormality in the region of the input image including the portion determined to have raised the medium by generating an input image in which the medium conveyed by the conveying unit is captured. It is determined whether or not, and the medium carrier is made to correct the image information in the area of the input image determined to have an abnormality.

According to the present invention, the medium transfer device, the image processing system, the control method and the control program can correct the input image in which an abnormality exists in a shorter time.

It is a block diagram of an example of an image processing system 1 according to an embodiment. It is a figure for demonstrating the transport path in the medium transport device 100. It is a schematic diagram for demonstrating the arrangement of the 1st sensor 111 and the like. It is a schematic diagram for demonstrating the arrangement of the 1st sensor 111 and the like. It is a block diagram which shows the schematic structure of the medium transfer apparatus 100 and the like. It is a figure which shows the schematic structure of the 1st storage device 140 and the 1st processing circuit 150. It is a figure which shows the schematic structure of the 2nd storage device 210 and the 2nd processing circuit 220. It is a flowchart which shows the example of the operation of the medium reading process. It is a flowchart which shows the example of the operation of the edge lift determination process. It is a schematic diagram for demonstrating an example of a characteristic of a 1st medium signal and the like. It is a schematic diagram for demonstrating an example of a characteristic of a 1st medium signal and the like. It is a flowchart which shows the example of the operation of the central part lift determination processing. It is a flowchart which shows the example of the operation of the double feed determination process. It is a flowchart which shows the example of the operation of the skew determination processing. It is a flowchart which shows the example of the operation of image processing. It is a schematic diagram which shows an example of the input image in which a chip of a medium exists. It is a schematic diagram which shows an example of the input image which a variant of a medium exists. It is a schematic diagram which shows an example of the input image which the curl of a medium exists. It is a schematic diagram which shows another example of the input image which the curl of a medium exists. It is a schematic diagram which shows an example of the input image which has wrinkles of a medium. It is a flowchart which shows the example of the operation of another medium reading process. It is a figure which shows the schematic structure of another 1st processing circuit 350. It is a figure which shows the schematic structure of another 2nd processing circuit 420.

Hereinafter, the image processing system according to one aspect of the present invention will be described with reference to the drawings. However, it should be noted that the technical scope of the present invention is not limited to those embodiments, but extends to the inventions described in the claims and their equivalents.

FIG. 1 is a configuration diagram of an example of an image processing system 1 according to an embodiment.

The image processing system 1 includes a medium transfer device 100 and an information processing device 200. The medium transfer device 100 is an image scanner or the like. The medium transport device 100 transports a medium as a document and takes an image. The medium is paper, cardboard, cards, booklets, passports, and the like. The medium transfer device 100 may be a facsimile, a copying machine, a multifunction printer (MFP, Multifunction Peripheral), or the like. The information processing device 200 is a personal computer, a multifunctional mobile terminal, a mobile phone, or the like. The medium transfer device 100 and the information processing device 200 are connected to each other.

The medium transfer device 100 includes a lower housing 101, an upper housing 102, a mounting table 103, a discharge table 104, a first operating device 105, a first display device 106, and the like.

The upper housing 102 is arranged at a position covering the upper surface of the medium transport device 100, and is engaged with the lower housing 101 by a hinge so that the upper housing 102 can be opened and closed when the medium is clogged, that is, when the inside of the medium transport device 100 is cleaned. There is.

The mounting table 103 is engaged with the lower housing 101 so that the medium to be transported can be mounted. The mounting table 103 has a mounting surface 103a on which a medium is mounted. The discharge base 104 is engaged with the lower housing 101 so as to be able to hold the discharged medium.

The first operation device 105 has an input device such as a button and an interface circuit for acquiring a signal from the input device, receives an input operation by the user, and outputs an operation signal corresponding to the input operation of the user. The first display device 106 has a display including a liquid crystal display, an organic EL (Electro-Luminescence), and an interface circuit for outputting image data to the display, and displays the image data on the display.

FIG. 2 is a diagram for explaining a transport path inside the medium transport device 100.

The transport paths inside the medium transport device 100 are the first sensor 111, the second sensor 112, the movement sensor 113, the third sensor 114, the feed roller 115, the brake roller 116, the fourth sensor 117, the ultrasonic transmitter 118a, and the super It has a sound wave receiver 118b, a first transfer roller 119, a second transfer roller 120, a fifth sensor 121, a first image pickup device 122a, a second image pickup device 122b, a third transfer roller 123, a fourth transfer roller 124, and the like. There is. The number of each roller is not limited to one, and the number of each roller may be plural.

The upper surface of the lower housing 101 forms the lower guide 107a of the medium transport path, and the lower surface of the upper housing 102 forms the upper guide 107b of the medium transport path. In FIG. 2, the arrow A1 indicates the medium transport direction. In the following, the upstream means the upstream in the medium transport direction A1, and the downstream means the downstream in the medium transport direction A1.

The third sensor 114 is arranged on the downstream side of the first sensor 111, the second sensor 112, and the movement sensor 113, and on the upstream side of the feed roller 115 and the brake roller 116. The third sensor 114 has a contact detection sensor and detects whether or not a medium is mounted on the mounting table 103. The third sensor 114 generates and outputs a third medium signal whose signal value changes depending on whether the medium is mounted on the mounting table 103 or not.

The feeding roller 115 is provided in the lower housing 101, and feeds the media mounted on the mounting table 103 in order from the lower side. The brake roller 116 is provided on the upper housing 102 and is arranged so as to face the feeding roller 115.

The fourth sensor 117 is arranged on the downstream side of the feed roller 115 and the brake roller 116 and on the upstream side of the first transfer roller 119 and the second transfer roller 120. The fourth sensor 117 detects whether or not a medium is present at that position. The fourth sensor 117 includes a light emitter and a light receiver provided on one side of the medium transport path, and a reflection member such as a mirror provided at a position facing the light emitter and the light receiver across the transport path. And include. The light emitter irradiates light toward the transport path. On the other hand, the light receiver receives the light irradiated by the light emitter and reflected by the reflecting member, and generates and outputs a fourth medium signal which is an electric signal corresponding to the intensity of the received light. When a medium is present at the position of the fourth sensor 117, the light emitted by the light emitter is blocked by the medium, so that the fourth medium is present or absent at the position of the fourth sensor 117. The signal value of the signal changes. The light emitter and the light receiver are provided at positions facing each other with the transport path interposed therebetween, and the reflective member may be omitted.

The ultrasonic transmitter 118a and the ultrasonic receiver 118b are arranged on the downstream side of the feed roller 115 and the brake roller 116 and on the upstream side of the first transfer roller 119 and the second transfer roller 120. The ultrasonic transmitter 118a and the ultrasonic receiver 118b are arranged in the vicinity of the transport path of the medium so as to face each other with the transport path in between. The ultrasonic transmitter 118a outputs ultrasonic waves. On the other hand, the ultrasonic receiver 118b receives the ultrasonic waves transmitted by the ultrasonic transmitter 118a and passed through the medium, and generates and outputs an ultrasonic signal which is an electric signal corresponding to the received ultrasonic waves. Hereinafter, the ultrasonic transmitter 118a and the ultrasonic receiver 118b may be collectively referred to as an ultrasonic sensor 118.

The fifth sensor 121 is arranged in the medium transport direction A1 on the downstream side of the first transport roller 119 and the second transport roller 120 and on the upstream side of the image pickup apparatus 122, and substantially in the central portion in the width direction A2 orthogonal to the medium transport direction. NS. The fifth sensor 121 detects whether or not a medium is present at that position. The fifth sensor 121 includes a light emitter and a light receiver provided on one side of the medium transport path, and a reflection member such as a mirror provided at a position facing the light emitter and the light receiver across the transport path. And include. The light emitter irradiates light toward the transport path. On the other hand, the light receiver receives the light irradiated by the light emitter and reflected by the reflecting member, and generates and outputs a fifth medium signal which is an electric signal corresponding to the intensity of the received light. When a medium is present at the position of the fifth sensor 121, the light emitted by the light emitter is blocked by the medium, so that the fifth medium is present or absent at the position of the fifth sensor 121. The signal value of the signal changes. The light emitter and the light receiver are provided at positions facing each other with the transport path interposed therebetween, and the reflective member may be omitted.

The first image pickup device 122a has a line sensor by a CIS (Contact Image Sensor) of the same magnification optical system type having an image pickup element by CMOS (Complementary Metal Oxide Semiconductor) arranged linearly in the main scanning direction. Further, the first image pickup apparatus 122a amplifies the light source that irradiates light toward the conveyed medium, the lens that forms an image on the image pickup element, and the electric signal output from the image pickup element, and is analog / digital (A). / D) It has an A / D converter to convert. The first imaging device 122a images a region facing the line sensor on the surface of the conveyed medium at regular intervals, sequentially generates a line image, and outputs the line image. That is, the number of pixels in the vertical direction (sub-scanning direction) of the line image is 1, and the number of pixels in the horizontal direction (main scanning direction) is a plurality.

Similarly, the second image pickup device 122b has a line sensor according to CIS of the same magnification optical system type having CMOS image pickup elements linearly arranged in the main scanning direction. Further, the second image pickup apparatus 122b amplifies the light source that irradiates light toward the conveyed medium, the lens that forms an image on the image pickup element, and the electric signal output from the image pickup element, and is analog / digital (A). / D) It has an A / D converter to convert. The second image pickup apparatus 122b takes an image of a region facing the line sensor on the back surface of the conveyed medium at regular intervals, sequentially generates a line image, and outputs the line image.

In the medium transport device 100, only one of the first image pickup device 122a and the second image pickup device 122b may be arranged, and only one side of the medium may be read. Further, instead of the line sensor by the same magnification optical system type CIS including the image sensor by CMOS, the line sensor by the same magnification optical system type CIS including the image pickup element by CCD (Charge Coupled Device) may be used. Further, a reduction optical system type line sensor including a CMOS or CCD image sensor may be used. Hereinafter, the first imaging device 122a and the second imaging device 122b may be collectively referred to as an imaging device 122.

The medium mounted on the mounting table 103 is conveyed in the medium transport direction A1 between the lower guide 107a and the upper guide 107b by the feeding roller 115 rotating in the direction of the arrow A4 in FIG. .. The brake roller 116 rotates in the direction of arrow A5 when the medium is conveyed. When a plurality of media are mounted on the mounting table 103 by the action of the feeding roller 115 and the brake roller 116, only the media in contact with the feeding roller 115 among the media mounted on the mounting table 103. Is separated. As a result, it operates so as to limit the transport of media other than the separated medium (prevention of double feeding).

The medium is fed between the first transfer roller 119 and the second transfer roller 120 while being guided by the lower guide 107a and the upper guide 107b. The medium is fed between the first imaging device 122a and the second imaging device 122b by rotating the first conveying roller 119 and the second conveying roller 120 in the directions of the arrows A6 and A7, respectively. The feeding roller 115, the brake roller 116, the first transport roller 119, and the second transport roller 120 are examples of a transport unit that transports the medium mounted on the mounting table 103 to the image pickup apparatus 122. The medium read by the image pickup apparatus 122 is discharged onto the discharge table 104 by rotating the third transfer roller 123 and the fourth transfer roller 124 in the directions of arrows A8 and A9, respectively.

3 to 4 are schematic views for explaining the arrangement of the first sensor 111, the second sensor 112, the mobile sensor 113, and the like. FIG. 3 is a schematic view of the upstream side of the medium transfer device 100 as viewed from the side. FIG. 4 is a schematic view of the upstream side of the medium transfer device 100 as viewed from above.

As shown in FIG. 3, the first sensor 111 and the second sensor 112 are arranged on the upper guide 107b, that is, on the upper side with respect to the transport path of the medium and on the upstream side of the feeding roller 115 and the brake roller 116. NS. Further, as shown in FIG. 4, the first sensor 111 and the second sensor 112 are arranged outside the moving sensor 113 in the width direction A2 orthogonal to the medium transport direction A1. The first sensor 111 is arranged on one side (left side in FIG. 4) from the center position P0 of the mounting table 103, and the second sensor 112 is on the other side (right side in FIG. 4) from the center position P0 of the mounting table 103. Is placed in.

The first sensor 111 is an infrared proximity sensor, which measures the distance from an object existing at an opposite position from the time difference from irradiation of infrared rays to reflection. The first sensor 111 includes a first light emitting unit 111a and a first light receiving unit 111b. The first light emitting unit 111a irradiates light (infrared light) toward the mounting surface 103a of the mounting table 103 or the medium M mounted on the mounting table 103. In particular, the first light emitting unit 111a irradiates light toward a position on the upstream side in the medium transport direction A1 and facing the first light emitting unit 111a in the width direction A2. On the other hand, the first light receiving unit 111b receives the light irradiated by the first light emitting unit 111a and reflected by the mounting surface 103a of the mounting table 103 or the medium M mounted on the mounting table 103, and the received light is used. A first medium signal, which is a corresponding electric signal, is generated and output as an output signal.

The first medium signal indicates the time from when the first light emitting unit 111a irradiates light to when the first light receiving unit 111b receives light and the amount of light received by the first light receiving unit 111b. Therefore, the first medium signal changes according to the distance from the first sensor 111 to the first portion P1 of the medium M mounted on the mounting table 103, which is irradiated by the first light emitting unit 111a. The first portion P1 is located on one side (left side in FIG. 4) of the medium M mounted on the mounting table 103 in the width direction A2 from the center position P0.

Similarly, the second sensor 112 is an infrared proximity sensor, which measures the distance to an object existing at an opposite position from the time difference from irradiation of infrared rays to reflection. The second sensor 112 includes a second light emitting unit 112a and a second light receiving unit 112b. The second light emitting unit 112a irradiates light (infrared light) toward the mounting surface 103a of the mounting table 103 or the medium M mounted on the mounting table 103. In particular, the second light emitting unit 112a irradiates light toward a position that is upstream in the medium transport direction A1 and faces the second light emitting unit 112a in the width direction A2. On the other hand, the second light receiving unit 112b receives the light irradiated by the second light emitting unit 112a and reflected by the mounting surface 103a of the mounting table 103 or the medium M mounted on the mounting table 103, and the received light is used. A second medium signal, which is a corresponding electric signal, is generated and output as an output signal.

The second medium signal indicates the time from when the second light emitting unit 112a irradiates the light until the second light receiving unit 112b receives the light and the amount of light received by the second light receiving unit 112b. Therefore, the second medium signal changes according to the distance from the second sensor 112 to the second portion P2 of the medium M mounted on the mounting table 103, which is irradiated by the second light emitting unit 112a. The second portion P2 is located on the other side (right side in FIG. 4) from the central position P0 of the medium M mounted on the mounting table 103 in the width direction A2.

The first sensor 111 and the second sensor 112 are used to detect the floating of a plurality of portions (first portion P1 and second portion P2) of the medium M mounted on the mounting table 103. As the first sensor 111 and the second sensor 112, for example, a known infrared proximity sensor capable of measuring a distance in the range of 0 to 100 mm with a resolution of 1 mm can be used.

The movement sensor 113 is arranged on the upper guide 107b, that is, on the upper side with respect to the transport path of the medium and on the upstream side of the feeding roller 115 and the brake roller 116. Further, the movement sensor 113 is arranged at the center of the upper housing 102 in the width direction A2.

The mobile sensor 113 includes an arm 113a, a support portion 113b, a shielding portion 113c, a mobile sensor light emitter 113d, a mobile sensor receiver 113e, and the like.

The support portion 113b is rotatably attached to the upper housing 102. The arm 113a is provided on the upper guide 107b, that is, on the upper side with respect to the transport path of the medium and on the upstream side of the feed roller 115 and the brake roller 116 so as to be in contact with the feed medium. The arm 113a and the shielding portion 113c are supported by the support portion 113b so as to be integrally swingable (rotary) with the support portion 113b as a rotation axis. A torsion coil spring 113f is provided between the upper housing 102 and the arm 113a. The torsion coil spring 113f is provided around the support portion 113b so that a force is applied to the arm 113a in the direction of the arrow A11 (downward in the height direction A3). Further, the upper housing 102 is provided with a stopper 113g for stopping the shielding portion 113c.

The mobile sensor light emitter 113d irradiates light toward the mobile sensor light receiver 113e. The mobile sensor light receiver 113e receives the light emitted by the mobile sensor light emitter 113d, and generates and outputs a movement amount signal which is an electric signal according to the intensity of the received light. When the shielding portion 113c is present between the moving sensor light emitter 113d and the moving sensor receiver 113e, the light emitted by the moving sensor light emitting device 113d is blocked by the shielding portion 113c. Therefore, the signal value of the movement amount signal changes according to the position of the shielding portion 113c, that is, according to the moving amount of the arm 113a moving together with the shielding portion 113c.

In a state where the medium mounted on the mounting table 103 is not in contact with the arm 113a, the shielding portion 113c is pressed upward by the arm 113a pressed downward by the torsion coil spring 113f and comes into contact with the stopper 113g to stop. do. As a result, the shielding portion 113c is arranged between the moving sensor light emitter 113d and the moving sensor receiver 113e, and the signal value of the moving amount signal indicates a state in which the arm 113a exists at the initial position shown in FIG. On the other hand, when the medium mounted on the mounting table 103 bends and comes into contact with the arm 113a, the arm 113a is pushed up by the bent medium in the direction opposite to the arrow A11. The shielding portion 113c moves downward by the arm 113a pressed upward by the bent medium. As a result, the shielding portion 113c does not exist between the moving sensor light emitter 113d and the moving sensor receiver 113e, and the signal value of the moving amount signal indicates a state in which the arm 113a does not exist at the initial position.

FIG. 5 is a block diagram showing a schematic configuration of the medium transfer device 100 and the information processing device 200.

The medium transfer device 100 further includes a motor 131, a first interface device 132, a first storage device 140, a first processing circuit 150, and the like, in addition to the above-described configuration.

The motor 131 includes one or a plurality of motors, and rotates the feed roller 115, the brake roller 116, and the first to fourth transfer rollers 119, 120, 123, and 124 by a control signal from the first processing circuit 150. To transport the medium.

The first interface device 132 has an interface circuit similar to a serial bus such as USB, and is electrically connected to the information processing device 200 to transmit and receive input images and various information. Further, instead of the first interface device 132, a communication unit having an antenna for transmitting and receiving wireless signals and a wireless communication interface device for transmitting and receiving signals through a wireless communication line according to a predetermined communication protocol may be used. good. The predetermined communication protocol is, for example, a wireless LAN (Local Area Network).

The first storage device 140 includes a memory device such as a RAM (Random Access Memory) and a ROM (Read Only Memory), a fixed disk device such as a hard disk, or a portable storage device such as a flexible disk and an optical disk. Further, the first storage device 140 stores computer programs, databases, tables, etc. used for various processes of the medium transfer device 100. The computer program may be installed in the first storage device 140 from a computer-readable portable recording medium using a known setup program or the like. The portable recording medium is, for example, a CD-ROM (compact disc read only memory), a DVD-ROM (digital versatile disc read only memory), or the like.

The first processing circuit 150 operates based on a program stored in the first storage device 140 in advance. The first processing circuit 150 is, for example, a CPU (Central Processing Unit). As the first processing circuit 150, a DSP (digital signal processor), an LSI (large scale integration), an ASIC (Application Specific Integrated Circuit), an FPGA (Field-Programmable Gate Array), or the like may be used.

The first processing circuit 150 includes a first operating device 105, a first display device 106, a first sensor 111, a second sensor 112, a mobile sensor 113, a third sensor 114, a fourth sensor 117, an ultrasonic sensor 118, and a fifth. It is connected to a sensor 121, an image pickup device 122, a motor 131, a first interface device 132, a first storage device 140, and the like, and controls each of these parts. The first processing circuit 150 performs drive control of the motor 131, image pickup control of the image pickup device 122, etc., generates an input image, and transmits the input image to the information processing device 200 via the first interface device 132. Further, the first processing circuit 150 determines whether or not floating occurs in a plurality of parts of the medium based on the first medium signal and the second medium signal from the first sensor 111 and the second sensor 112, and the first processing circuit 150 determines whether or not the floating occurs in a plurality of parts of the medium. The determination result is transmitted to the information processing device 200 via the interface device 132.

On the other hand, the information processing device 200 further includes a second operation device 201, a second display device 202, a second interface device 203, a second storage device 210, a second processing circuit 220, and the like.

The second operating device 201 further includes an input device such as a keyboard and a mouse, and an interface circuit that acquires a signal from the input device, receives an operation by the user, and receives a signal according to the input of the user in the second processing circuit 220. Output to. The second display device 202 has a display composed of a liquid crystal display, an organic EL, or the like, and an interface circuit for outputting image data to the display, and displays the image data on the display according to an instruction from the second processing circuit 220.

The second interface device 203 has an interface circuit or a wireless communication interface circuit similar to that of the first interface device 132, and communicates with the medium carrier device 100 to transmit and receive various images and information.

The second storage device 210 includes a memory device such as RAM and ROM, a fixed disk device such as a hard disk, a portable storage device such as a flexible disk and an optical disk, and the like. Further, the second storage device 210 stores computer programs, databases, tables, etc. used for various processes of the information processing device 200. The computer program may be installed in the second storage device 210 from a computer-readable portable recording medium such as a CD-ROM or a DVD-ROM using a known setup program or the like. In addition, various images are stored in the second storage device 210.

The second processing circuit 220 operates based on a program stored in the second storage device 210 in advance. The second processing circuit 220 is, for example, a CPU. As the second processing circuit 220, a DSP, LSI, ASIC, FPGA or the like may be used.

The second processing circuit 220 is connected to the second operating device 201, the second display device 202, the second interface device 203, the second storage device 210, and the like, and controls each of these parts. The second processing circuit 220 controls each device and executes image processing on the image acquired from the medium transfer device 100.

FIG. 6 is a diagram showing a schematic configuration of a first storage device 140 and a first processing circuit 150.

As shown in FIG. 6, the first storage device 140 includes a control program 141, an image generation program 142, a first lift determination program 143, a second lift determination program 144, a double feed determination program 145, a skew determination program 146, and the like. Be remembered. Each of these programs is a functional module implemented by software running on the processor. The first processing circuit 150 reads each program stored in the first storage device 140 and operates according to each read program. As a result, the first processing circuit 150 functions as a control unit 151, an image generation unit 152, a first lift determination unit 153, a second lift determination unit 154, a double feed determination unit 155, and a skew determination unit 156.

FIG. 7 is a diagram showing a schematic configuration of the second storage device 210 and the second processing circuit 220.

As shown in FIG. 7, the second storage device 210 stores the abnormality determination program 211, the correction program 212, the display control program 213, and the like. Each of these programs is a functional module implemented by software running on the processor. The second processing circuit 220 reads each program stored in the second storage device 210 and operates according to each read program. As a result, the second processing circuit 220 functions as an abnormality determination unit 221 and a correction unit 222 and a display control unit 223.

FIG. 8 is a flowchart showing an example of the operation of the medium reading process of the medium transport device 100.

Hereinafter, an example of the operation of the medium reading process of the medium conveying device 100 will be described with reference to the flowchart shown in FIG. The operation flow described below is mainly executed by the first processing circuit 150 in cooperation with each element of the medium transfer device 100 based on the program stored in the first storage device 140 in advance. The operation flow shown in FIG. 8 is executed periodically.

First, the control unit 151 waits until the user inputs an instruction to read the medium using the first operation device 105 and receives an operation signal instructing to read the medium from the first operation device 105 ( Step S101).

Next, the control unit 151 acquires a third medium signal from the third sensor 114, and determines whether or not the medium is mounted on the mounting table 103 based on the acquired third medium signal (step S102). ).

When the medium is not mounted on the mounting table 103, the control unit 151 returns the process to step S101 and waits until a new operation signal is received from the first operating device 105.

On the other hand, when the medium is mounted on the mounting table 103, the control unit 151 drives the motor 131 to drive the feeding roller 115, the brake roller 116, and the first to fourth transport rollers 119, 120, 123, 124. It is rotated to convey the medium (step S103).

Next, the control unit 151 sets the first floating flag, the second floating flag, the central floating flag, the double feed flag, and the skew flag to OFF (step S104). The first lift flag is set to ON when it is determined that a lift has occurred at the end of the medium based on the first medium signal from the first sensor 111 in the edge lift determination process described later. NS. The second lift flag is set to ON when it is determined that a lift has occurred at the end of the medium based on the second medium signal from the second sensor 112 in the edge lift determination process described later. NS.

The central portion lift flag is turned on when it is determined in the central portion lift determination process, which will be described later, that a lift has occurred in the central portion of the medium based on the movement amount signal from the movement sensor 113. Is set to. The double feed flag is set to ON when it is determined that double feed of the medium is occurring based on the ultrasonic signal from the ultrasonic sensor 118 in the double feed determination process described later. The skew flag is set to ON when it is determined that the medium is skewed based on the fifth medium signal from the fifth sensor 121 and the line image from the imaging device 122 in the skew determination process described later. Will be done.

Next, the control unit 151 determines whether or not floating has occurred at the end of the medium mounted on the mounting table 103 (step S105). The control unit 151 determines whether or not the floating occurs at the end of the medium depending on whether or not the first floating flag or the second floating flag is ON.

When the floating does not occur at the end of the medium, the control unit 151 determines whether or not the first condition is satisfied (step S106). The control unit 151 determines that the first condition is satisfied when, for example, the floating occurs in the central portion of the medium and the skew of the medium and the double feeding of the medium do not occur, and in other cases, the first condition is satisfied. Judge that the condition is not satisfied. The control unit 151 determines whether or not floating has occurred in the central portion of the medium depending on whether or not the central portion lifting flag is ON. Further, the control unit 151 determines whether or not the medium is skewed depending on whether or not the skew flag is ON. Further, the control unit 151 determines whether or not the double feed of the medium has occurred depending on whether or not the double feed flag is ON. If the first condition is not satisfied, the control unit 151 determines that no transfer abnormality such as bending or skew of the medium has occurred at this time, and shifts the process to step S109.

On the other hand, when the first condition is satisfied, the control unit 151 determines that a transfer abnormality such as bending or skew of the medium has occurred, stops the motor 131, and stops the transfer of the medium (step S107). , End a series of steps. In the medium transport device 100 that feeds the media in order from the lower side, when the lift at the end, the skew and the double feed do not occur, and the lift occurs at the center, two along the medium transport direction A1. The folded medium may be transported and the central part may be bent. Further, in this case, a small booklet such as a passport whose length in the width direction A2 is shorter than the distance between the first sensor 111 and the second sensor 112 is transported so that the binding portion is orthogonal to the medium transport direction A1. , The entire small booklet may be bent. When the first condition is satisfied, the control unit 151 can prevent the medium from being jammed and damaged by stopping the transport of the medium. The control unit 151 may determine that the first condition is satisfied regardless of whether or not skew and / or double feeding of the medium has occurred.

On the other hand, when the floating occurs at the end of the medium, the control unit 151 determines whether or not the second condition is satisfied (step S108). The control unit 151 determines that the second condition is satisfied when, for example, at least one of skewing or double feeding of the medium has occurred and no floating has occurred in the central portion of the medium, and in other cases, the second condition is satisfied. It is determined that the second condition is not satisfied.

When the second condition is satisfied, the control unit 151 determines that a transfer abnormality such as bending or skew of the medium has occurred, stops the motor 131, stops the transfer of the medium (step S107), and performs a series of operations. End the step of. In the medium transport device 100 that feeds the media in order from the lower side, when the floating at the central portion does not occur, the floating at the end portion occurs, and skew or double feeding occurs, one end on the upstream side is The stapled medium may be transported and the edges may be bent. Further, in this case, there is a possibility that the medium folded in half along the medium transport direction A1 is transported and the end portion is bent. When the second condition is satisfied, the control unit 151 can prevent the medium from being jammed and damaged by stopping the transport of the medium. The control unit 151 determines that the second condition is satisfied regardless of whether or not the floating occurs in the central portion of the medium when at least one of skewing or double feeding of the medium occurs. May be good.

On the other hand, when the second condition is not satisfied, the control unit 151 determines whether or not the entire medium has passed the imaging position of the imaging device 122 (step S109). The control unit 151 periodically acquires a fifth medium signal from the fifth sensor 121, and determines whether or not a medium exists at the position of the fifth sensor 121 based on the acquired fifth medium signal. The control unit 151 passes the rear end of the medium through the position of the fifth sensor 121 when the signal value of the fifth medium signal changes from a value indicating the presence of the medium to a value indicating the absence of the medium. It is determined that it has been done. The control unit 151 determines that the entire medium has passed the imaging position when a predetermined time has elapsed since the rear end of the medium passed the position of the fifth sensor 121. When the control unit 151 acquires a predetermined number of line images from the image pickup apparatus 122, the control unit 151 may determine that the entire conveyed medium has passed the image pickup position. If the entire medium has not yet passed the imaging position, the control unit 151 returns the process to step S105 and repeats the processes of steps S105 to S109.

On the other hand, when the entire medium has passed the imaging position, the image generation unit 152 acquires each line image generated during the medium transfer from the imaging device 122, and synthesizes all the acquired line images to generate an input image. (Step S110).

Next, the image generation unit 152 transmits the input image, the first floating flag, and the second floating flag to the information processing device 200 via the first interface device 132 (step S111).

Next, the control unit 151 determines whether or not the medium remains on the mounting table 103 based on the third medium signal acquired from the third sensor 114 (step S112). When the medium remains on the mounting table 103, the control unit 151 returns the process to step S104 and repeats the processes of steps S104 to S112.

On the other hand, when no medium remains on the mounting table 103, the control unit 151 stops the motor 131, stops the transport of the medium (step S113), and ends a series of steps.

In the medium reading process, the processes of steps S105 to S108 may be omitted.

FIG. 9 is a flowchart showing an example of the operation of the end lift determination process of the medium transport device 100.

Hereinafter, an example of the operation of the end lift determination process of the medium transfer device 100 will be described with reference to the flowchart shown in FIG. The operation flow described below is mainly executed by the first processing circuit 150 in cooperation with each element of the medium transfer device 100 based on the program stored in the first storage device 140 in advance. The flow of operations shown in FIG. 9 is periodically executed during medium transfer.

First, the first lift determination unit 153 acquires the first medium signal from the first sensor 111 (step S201). Next, the first lift determination unit 153 determines whether or not the time indicated in the acquired first medium signal is less than the edge lift threshold value (step S202).

10A and 10B are schematic views for explaining an example of the characteristics of the first medium signal and the second medium signal.

FIG. 10A shows a first medium signal 1001 and a second medium signal 1002 when a medium in which the first portion P1 side and the second portion P2 side are not bent is conveyed. FIG. 10B shows the first medium signal 1011 and the second medium signal 1012 when a medium in which the first portion P1 side is bent and the second portion P2 side is not bent is conveyed. In FIGS. 10A and 10B, the horizontal axis represents the time from the start of transportation (the amount of drive of the motor 131), and the vertical axis represents the time shown in each medium signal. When the first medium signal 1001 and the second medium signal 1002 were generated, the medium was not lifted at the position where the first sensor 111 and the second sensor 112 were irradiated with light, so that the first medium signal 1001 and the second medium signal 1001 and the first medium signal 1001 were not lifted. The time shown in the two-media signal 1002 is large enough. Further, when the second medium signal 1012 is generated, the medium does not float at the position where the second sensor 112 irradiates the light, so that the time indicated by the second medium signal 1012 is sufficiently long. On the other hand, when the first medium signal 1011 is generated, the medium is lifted at the position where the first sensor 111 irradiates the light, so that the time indicated by the first medium signal 1011 is reduced.

The end levitation threshold value T is the time indicated by the first medium signal and the second medium signal when the levitation of the medium is occurring, and the first medium signal and the second medium when the levitation of the medium is not occurring. Set to a value between the time indicated on the signal. The first levitation determination unit 153 determines whether or not the time indicated by each medium signal is less than the end levitation threshold value T, and thereby whether or not the levitation of the medium occurs in the portion corresponding to each medium signal. Can be determined.

When the time indicated by the first medium signal is equal to or longer than the end floating threshold value, the first floating determination unit 153 determines that the medium has not been lifted in the first portion P1 of the medium (step S203), and processes the process. To step S206. On the other hand, when the time indicated by the first medium signal is less than the end floating threshold value, the first floating determination unit 153 determines that the floating of the medium has occurred in the first portion P1 of the medium (step S204). Next, the first lift determination unit 153 sets the first lift flag to ON (step S205).

Next, the first lift determination unit 153 acquires the second medium signal from the second sensor 112 (step S206). Next, the first lift determination unit 153 determines whether or not the time indicated by the acquired second medium signal is less than the edge lift threshold value (step S207).

When the time indicated by the second medium signal is equal to or longer than the end levitation threshold value, the first levitation determination unit 153 determines that no levitation of the medium has occurred in the second portion P2 of the medium (step S208), and a series of steps. End the step of. On the other hand, when the time indicated by the second medium signal is less than the end floating threshold value, the first floating determination unit 153 determines that the floating of the medium has occurred in the second portion P2 of the medium (step S209). Next, the first lift determination unit 153 sets the second lift flag to ON (step S210), and ends a series of steps.

As described above, the first lift determination unit 153 is an example of the lift determination unit, and based on the output signals from the first sensor 111 and the second sensor 112 sensor, any part of the plurality of parts of the medium of the medium. Determine if floating has occurred.

The first floating determination unit 153 determines whether or not the time indicated by each medium signal is less than or equal to the end floating threshold value, but whether or not the amount of change in time indicated by each medium signal is equal to or greater than the change threshold value. Therefore, it may be determined whether or not the floating of the medium occurs in each part of the medium. Further, the first lift determination unit 153 determines each part of the medium depending on whether or not the difference between the time indicated by each medium signal immediately before the transfer and the time indicated by each medium signal during transfer is equal to or greater than the change threshold value. It may be determined whether or not the floating of the medium has occurred. The change threshold is set to a time corresponding to a change (for example, 1 mm) in the height direction A3 that occurs when an abnormality such as chipping, irregular shape, curl, wrinkle, or unevenness of the medium is present. As a result, the first lift determination unit 153 can determine with high accuracy whether or not the medium has lifted.

FIG. 11 is a flowchart showing an example of the operation of the central portion lift determination process of the medium transport device 100.

Hereinafter, an example of the operation of the central portion lift determination process of the medium transfer device 100 will be described with reference to the flowchart shown in FIG. The operation flow described below is mainly executed by the first processing circuit 150 in cooperation with each element of the medium transfer device 100 based on the program stored in the first storage device 140 in advance. The flow of operations shown in FIG. 11 is periodically executed during medium transfer.

First, the second lift determination unit 154 acquires a movement amount signal from the movement sensor 113 (step S301). Next, the second lift determination unit 154 determines whether the signal value of the acquired movement amount signal indicates a state in which the arm 113a exists in the initial position or does not exist in the initial position (step S302). ..

When the signal value of the movement amount signal indicates a state in which the arm 113a exists at the initial position, the second lift determination unit 154 determines that the medium has not lifted in the central portion of the medium (step S303). Finish a series of steps. On the other hand, when the signal value of the movement amount signal indicates a state in which the arm 113a does not exist at the initial position, the second lift determination unit 154 determines that the medium is lifted at the center of the medium (step S304). ). Next, the second lift determination unit 154 sets the center lift flag to ON (step S305), and ends a series of steps.

FIG. 12 is a flowchart showing an example of the operation of the double feed determination process of the medium transfer device 100.

Hereinafter, an example of the operation of the double feed determination process of the medium transfer device 100 will be described with reference to the flowchart shown in FIG. The operation flow described below is mainly executed by the first processing circuit 150 in cooperation with each element of the medium transfer device 100 based on the program stored in the first storage device 140 in advance. The flow of operations shown in FIG. 12 is periodically executed during medium transfer.

First, the double feed determination unit 155 acquires an ultrasonic signal from an ultrasonic sensor 118 (step S401). Next, the double feed determination unit 155 determines whether or not the signal value of the acquired ultrasonic signal is less than the double feed threshold value (step S402). The double feed threshold value is set to a value between the signal value of the ultrasonic signal when a sheet of paper is being conveyed and the signal value of the ultrasonic signal when the double feed of paper is occurring. ..

When the signal value of the ultrasonic signal is equal to or greater than the double feed threshold value, the double feed determination unit 155 determines that double feed of the medium has not occurred (step S403), and ends a series of steps. On the other hand, when the signal value of the ultrasonic signal is less than the double feed threshold value, the double feed determination unit 155 determines that double feed of the medium has occurred (step S404). Next, the double feed determination unit 155 sets the double feed flag to ON (step S405), and ends a series of steps.

FIG. 13 is a flowchart showing an example of the operation of the skew determination process of the medium transfer device 100.

Hereinafter, an example of the operation of the double feed determination process of the medium transfer device 100 will be described with reference to the flowchart shown in FIG. The operation flow described below is mainly executed by the first processing circuit 150 in cooperation with each element of the medium transfer device 100 based on the program stored in the first storage device 140 in advance. The flow of operations shown in FIG. 13 is periodically executed during medium transfer.

First, the skew determination unit 156 determines whether or not the skew condition is satisfied (step S501). The skew determination unit 156 determines whether or not the central portion of the tip of the medium has reached the position of the fifth sensor 121. The skew determination unit 156 periodically acquires a fifth medium signal from the fifth sensor 121, and determines whether or not a medium exists at the position of the fifth sensor 121 based on the acquired fifth medium signal. In the skew determination unit 156, when the signal value of the fifth medium signal changes from a value indicating that the medium does not exist to a value indicating that the medium exists, the central portion of the tip of the medium is the value of the fifth sensor 121. It is determined that the position has been reached.

Further, the skew determination unit 156 determines whether or not each end of the tip of the medium has reached the image pickup position of the image pickup apparatus 122. The skew determination unit 156 acquires a line image from the image pickup device 122 each time the image pickup device 122 generates a line image. The skew determination unit 156 calculates the average value of the gradation values of the pixels in each end region within a predetermined range from both ends of the line image for each of the latest line image and the line image acquired immediately before. When the absolute value of the difference between the average value calculated from each end region of the latest line image and the average value calculated from each end region of the immediately preceding line image is equal to or greater than the gradation threshold value of the skew determination unit 156. , It is determined that each end of the tip of the medium has reached the imaging position. On the other hand, when the absolute value of the difference is less than the gradation threshold value, the skew determination unit 156 determines that each end of the tip of the medium has not yet reached the imaging position. The gradation value is a luminance value or a color value (R value, G value or B value). The gradation threshold value is set to, for example, a difference in gradation value (for example, 20) that allows a person to visually discriminate a difference in brightness or color on an image.

The skew determination unit 156 determines that the skew condition is satisfied if any end of the tip of the medium reaches the imaging position before the central portion of the tip of the medium reaches the position of the fifth sensor 121. .. In the skew determination unit 156, when a predetermined time elapses after any end of the tip of the medium reaches the imaging position, the central portion of the tip of the medium does not reach the position of the fifth sensor 121. In that case, it may be determined that the skew condition is satisfied. Further, when the skew determination unit 156 reaches the imaging position when any end of the tip of the medium reaches the imaging position before a predetermined time elapses after the central portion of the tip of the medium reaches the position of the fifth sensor 121. It may be determined that the skew condition is satisfied. On the other hand, in other cases, the skew determination unit 156 determines that the skew condition is not satisfied.

The skew determination unit 156 may determine whether or not the skew condition is satisfied depending on whether or not the difference in time when each of the plurality of portions at the tip of the medium reaches the imaging position is equal to or greater than the threshold value. .. Further, the medium transport device 100 arranges a plurality of optical sensors side by side at intervals in the width direction A2, and the skew determination unit 156 has a difference in time when the tip of the medium reaches the position of each optical sensor at a threshold value or more. Whether or not the skew condition is satisfied may be determined depending on whether or not the skew condition is satisfied.

If the skew condition is not satisfied, the skew determination unit 156 determines that the medium has not been skewed (step S502), and ends a series of steps. On the other hand, when the skew condition is satisfied, the skew determination unit 156 determines that the medium has been skewed (step S503). Next, the skew determination unit 156 sets the skew flag to ON (step S504), and ends a series of steps.

FIG. 14 is a flowchart showing an example of the operation of image processing of the information processing apparatus 200.

Hereinafter, an example of the operation of image processing of the information processing apparatus 200 will be described with reference to the flowchart shown in FIG. The operation flow described below is mainly executed by the second processing circuit 220 in cooperation with each element of the information processing device 200 based on the program stored in the second storage device 210 in advance. The operation flow shown in FIG. 14 is when the abnormality determination unit 221 of the information processing device 200 acquires the input image, the first floating flag, and the second floating flag from the medium transfer device 100 via the second interface device 203. Will be executed.

First, the abnormality determination unit 221 determines whether or not the first floating flag and the second floating flag acquired together with the input image are ON (step S601). When both the first floating flag and the second floating flag are OFF, the abnormality determination unit 221 shifts the process to step S606.

On the other hand, when at least one of the first floating flag and the second floating flag is ON, the abnormality determination unit 221 detects the medium region including the medium in the input image (step S602). The abnormality determination unit 221 calculates the absolute value of the difference in the gradation values of the pixels on both sides of each pixel in the input image in the horizontal direction and the vertical direction (hereinafter referred to as adjacent difference values), and calculates the adjacent difference values. When exceeds the gradation threshold, the pixel is extracted as an edge pixel. The abnormality determination unit 221 may calculate the absolute value of the difference between the gradation values of two pixels separated from each pixel in the input image by a predetermined distance as the adjacent difference value. Further, the abnormality determination unit 221 may extract edge pixels by comparing the gradation value of each pixel in the input image with the threshold value. For example, in the abnormality determination unit 221, the gradation value of a specific pixel is less than the threshold value, and the gradation value of a pixel adjacent to the specific pixel or a pixel separated by a predetermined distance from the specific pixel is equal to or more than the threshold value. In this case, the specific pixel is used as an edge pixel. The abnormality determination unit 221 generates an edge image composed of edge pixels in each of the horizontal direction and the vertical direction.

Next, the abnormality determination unit 221 extracts a plurality of straight lines from each edge image generated in each of the horizontal direction and the vertical direction. The abnormality determination unit 221 detects a straight line using the Hough transform. The abnormality determination unit 221 may detect a straight line by using the least squares method. Further, the abnormality determination unit 221 groups the edge pixels adjacent to each other in each edge image into one group by labeling, and connects two edge pixels located at both ends in the horizontal direction or the vertical direction of each group. May be detected as a straight line.

Next, the abnormality determination unit 221 detects a rectangle from the plurality of detected straight lines. The abnormality determination unit 221 extracts a plurality of rectangle candidates composed of four straight lines in which two of the detected straight lines are substantially orthogonal to each other. The abnormality determination unit 221 first selects one horizontal straight line (hereinafter referred to as the first horizontal line), and is substantially parallel to the selected straight line (for example, within ± 3 °) and in the horizontal direction separated by the first distance or more. A straight line (hereinafter referred to as a second horizontal line) is extracted. Next, the abnormality determination unit 221 extracts a straight line in the vertical direction (hereinafter, referred to as the first vertical line) substantially orthogonal to the first horizontal line (for example, within ± 3 ° with respect to 90 °). Next, the abnormality determination unit 221 extracts a straight line in the vertical direction (hereinafter, referred to as a second vertical line) that is substantially orthogonal to the first horizontal line and is separated from the first vertical line by a second distance or more. The first distance and the second distance are predetermined according to the size of the medium to be read by the medium transfer device 100, and may be the same value.

The abnormality determination unit 221 extracts all combinations of the first horizontal line, the second horizontal line, the first vertical line, and the second vertical line satisfying the above conditions for all the extracted straight lines, and each extracted combination. The rectangle candidate having the largest area among the rectangle candidates composed of is detected as the medium area.

Next, the abnormality determination unit 221 specifies an area of the input image including a portion determined by the first floating determination unit 153 that the medium has been lifted (step S603). The abnormality determination unit 221 specifies an area in the input image corresponding to the floating flag set to ON as an area of the input image including the portion determined that the floating of the medium has occurred.

The second storage device 210 stores in advance a first region in the input image corresponding to the first floating flag and a second region in the input image corresponding to the second floating flag. For example, the first region corresponds to a predetermined distance (for example, 50 mm) from the light irradiation position by the first sensor 111 in the width direction A2 (main scanning direction) and is entirely in the medium transport direction A1 (secondary scanning direction). Set to an area that covers a range. Further, the second region is set to a region corresponding to a predetermined distance from the light irradiation position by the second sensor 112 in the width direction A2 and covering the entire range in the medium transport direction A1. The first region is set in the input image on the side corresponding to the first sensor 111 from the center position in the width direction A2, and the second region is the second region in the input image from the center position in the width direction A2. It may be set in the area on the side corresponding to the sensor 112.

When the first floating flag is ON, the abnormality determination unit 221 specifies the first region as the region of the input image including the portion determined to have the floating of the medium. Further, when the second floating flag is ON, the abnormality determination unit 221 specifies the second area as the area of the input image including the portion determined that the medium has been lifted.

Next, the abnormality determination unit 221 determines whether or not an abnormality exists in each of the specified regions (step S604). The abnormality determination unit 221 determines whether or not the medium is chipped, deformed, curled, wrinkled, or uneven as an abnormality in each of the specified regions. The abnormality determination unit 221 has an abnormality in the region not specified in step S603, that is, the region of the input image corresponding to the portion where the first lift determination unit 153 has not determined that the medium has lifted. Does not determine if is present.

The abnormality determination unit 221 determines that the medium is chipped when there are notches at the four corners of the medium region. The abnormality determination unit 221 does not extend to a position where two substantially orthogonal straight lines intersect each other among the straight lines forming the end portion of the medium region, and the end portion of each straight line passes through the edge pixel. If they are connected, it is determined that there is a chip in the medium. When the first region is specified in step S603, the abnormality determination unit 221 determines whether or not there is a chip in the upper left portion of the medium from each straight line forming the left side and the upper side of the medium, and determines whether the left side and the lower side of the medium are chipped. From each straight line formed, it is determined whether or not there is a chip in the lower left part of the medium. When the second region is specified in step S603, the abnormality determination unit 221 determines whether or not there is a chip in the upper right portion of the medium from each straight line forming the right side and the upper side of the medium, and determines whether the right side and the lower side of the medium are chipped. From each straight line formed, it is determined whether or not there is a chip in the lower right part of the medium.

FIG. 15A is a schematic view showing an example of the input image 1500 in which the medium is chipped.

The input image 1500 shown in FIG. 15A includes a medium 1503. The upper left portion, the lower left portion, and the upper right portion of the medium 1503 are not bent, and the lower right portion is bent. Therefore, in the input image 1500, the first region 1501 does not have a chipped medium 1503, and the second region 1502 has a chipped medium 1503. In this case, the straight line 1505 forming the right side of the medium 1503 and the straight line 1506 forming the lower side do not extend to the positions where they intersect each other. Further, the lower end portion 1507 of the straight line 1505 forming the right side and the right end portion 1508 of the straight line 1506 forming the lower side are connected via the edge pixel 1509 (or the edge pixel 1510). Therefore, in the abnormality determination unit 221, the medium is chipped depending on whether or not the two substantially orthogonal straight lines extend to a position where they intersect each other and whether or not the ends of the straight lines are connected via the edge pixels. Whether or not it exists can be accurately determined.

Further, the abnormality determination unit 221 determines that a variant of the medium exists when the medium area includes a rectangular area having a size within a predetermined range. The abnormality determination unit 221 extracts rectangle candidates in the medium region in the same manner as in the process of step S602, and determines that a variant of the medium exists when the rectangle candidates whose size is within a predetermined range are extracted. The predetermined range is set to, for example, a range that is equal to or larger than the size of a general sticky note and smaller than or equal to the size of a general photograph. When the first region is specified in step S603, the abnormality determination unit 221 determines whether or not there is a variant of the medium in the first region. Further, when the second region is specified in step S603, the abnormality determination unit 221 determines whether or not there is a variant of the medium in the second region.

FIG. 15B is a schematic view showing an example of the input image 1520 in which a variant of the medium is present.

The input image 1520 shown in FIG. 15B includes a medium 1523. Nothing is attached to the left side portion of the medium 1523, and a sticky note is attached to the right side portion. Therefore, in the input image 1520, the variant of the medium 1523 does not exist in the first region 1521, and the variant 1524 of the medium 1523 exists in the second region 1522. In this case, the second region 1522 includes rectangular candidate 1524 whose size is within a predetermined range. Therefore, the abnormality determination unit 221 can accurately determine whether or not there is a variant of the medium depending on whether or not there is a rectangular candidate whose size is within a predetermined range.

Further, the abnormality determination unit 221 determines that the curl of the medium is present when the end of the side of the medium extending in the vertical direction is bent. The abnormality determination unit 221 corresponds to the vertical straight line extending in the vertical direction to the position of the horizontal straight line extending in the horizontal direction among the straight lines forming the end portion of the medium region. It is determined that there is no curl on the side. On the other hand, when the vertical straight line is not extended to the position of the horizontal straight line, the abnormality determination unit 221 sets an approximate straight line obtained by extending the vertical straight line to the horizontal straight line side. The abnormality determination unit 221 extracts peripheral edge pixels located within a predetermined distance from the approximate straight line from the edge pixels extracted in step S602. In the abnormality determination unit 221, the larger the number of extracted peripheral edge pixels and the greater the distance between the end of the vertical straight line on the horizontal straight line side and each peripheral edge pixel, the more the approximate straight line and each peripheral edge pixel If the distance from is large, it is determined that the medium is curled. When each peripheral edge pixel is located on the center side of the medium with respect to the approximate straight line, the abnormality determination unit 221 determines that the tip of the medium is curled in the direction away from the image pickup apparatus 122. On the other hand, when each peripheral edge pixel is located outside the medium from the approximate straight line, the abnormality determination unit 221 determines that the tip of the medium is curled in the direction approaching the image pickup apparatus 122.

When the first region is specified in step S603, the abnormality determination unit 221 determines whether or not a curl is present on the left side of the medium. Further, when the second region is specified in step S603, the abnormality determination unit 221 determines whether or not a curl is present on the right side of the medium.

FIG. 15C is a schematic view showing an example of the input image 1540 in which the curl of the medium is present.

The input image 1540 shown in FIG. 15C includes a medium 1543. The left side of the medium 1543 is not curved, and the right side is curved in the direction away from the image pickup apparatus 122. Therefore, in the input image 1540, the curl of the medium 1543 does not exist in the first region 1541, and the curl 1544 of the medium 1543 exists in the second region 1542. In this case, the vertical straight line 1545 corresponding to the right side of the medium 1543 extends only to the end 1549, not to the position of the horizontal straight line 1546 corresponding to the lower side. Further, there are a predetermined number or more of peripheral edge pixels 1548 within a predetermined distance from the approximate straight line 1547 in which the vertical straight line 1545 is extended to the horizontal straight line 1546 side. Further, the larger the distance between the end portion 1549 on the horizontal straight line 1546 side of the vertical straight line 1545 and each peripheral edge pixel 1548, the larger the distance between the approximate straight line 1547 and each peripheral edge pixel 1548. Further, each peripheral edge pixel 1548 is located on the center side of the medium with respect to the approximate straight line 1547, and a shadow exists around each peripheral edge pixel 1548.

FIG. 15D is a schematic diagram showing another example of the input image 1560 in which the curl of the medium is present.

The input image 1560 shown in FIG. 15D includes the medium 1563. The left side of the medium 1563 is not curled, and the right side is curled in the direction approaching the image pickup apparatus 122. Therefore, in the input image 1560, the curl of the medium 1563 does not exist in the first region 1561, and the curl 1564 of the medium 1563 exists in the second region 1562. In this case, the vertical straight line 1565 corresponding to the right side of the medium 1563 extends only to the end 1569, not to the position of the horizontal straight line 1566 corresponding to the lower side. Further, there are a predetermined number or more of peripheral edge pixels 1568 within a predetermined distance from the approximate straight line 1567 in which the vertical straight line 1565 is extended to the horizontal straight line 1566 side. Further, the larger the distance between the end portion 1569 on the horizontal straight line 1566 side of the vertical straight line 1565 and each peripheral edge pixel 1568, the larger the distance between the approximate straight line 1567 and each peripheral edge pixel 1568. Further, each peripheral edge pixel 1568 is located outside the medium with respect to the approximate straight line 1567, and the periphery of each peripheral edge pixel 1548 is bright.

Therefore, the abnormality determination unit 221 determines whether or not the vertical straight line extends to the position of the horizontal straight line, the number of peripheral edge pixels existing within a predetermined distance from the approximate straight line, and the positional relationship between the approximate straight line and each peripheral edge pixel. Based on the above, it is possible to accurately determine whether or not the curl of the medium is present. Further, the abnormality determination unit 221 curls in the direction away from the image pickup device 122 or approaches the image pickup device 122 depending on whether each peripheral edge pixel is located on the center side or the outside of the medium with respect to the approximate straight line. It is possible to accurately determine whether or not it is curled.

Further, the abnormality determination unit 221 determines whether or not wrinkles or unevenness are included in the medium region by using a known technique such as machine learning. When an image is input, the abnormality determination unit 221 calculates the probability that the image contains wrinkles or unevenness of the medium by a discriminator that has been pre-learned to output the probability that the image contains wrinkles or unevenness of the medium. do. The classifier is pre-learned by a neural network or the like using a plurality of learning images including wrinkles or unevenness of the medium and a plurality of learning images not including wrinkles or unevenness of the medium, and is stored in advance in the second memory. It is stored in the device 210. The abnormality determination unit 221 inputs an image including the medium area to the classifier, and determines whether or not the medium area contains wrinkles or unevenness depending on whether or not the accuracy output from the classifier is equal to or higher than the threshold value. do.

Further, the abnormality determination unit 221 may determine whether or not wrinkles or unevenness are included in the medium region by using the pattern matching technique. In that case, a plurality of image patterns including wrinkles or unevenness of the medium are stored in advance in the second storage device 210. The abnormality determination unit 221 cuts out an area of a predetermined size in the medium area while shifting its position, calculates the degree of similarity with the image pattern stored in the second storage device 210, and calculates the degree of similarity. Whether or not wrinkles or unevenness is included in the medium region is determined based on whether or not is equal to or greater than the threshold value. The similarity is, for example, a normalized cross-correlation value.

When the first region is specified in step S603, the abnormality determination unit 221 determines whether or not there are wrinkles or unevenness of the medium in the first region. Further, when the second region is specified in step S603, the abnormality determination unit 221 determines whether or not there are wrinkles or unevenness of the medium in the second region.

FIG. 16 is a schematic view showing an example of the input image 1600 in which wrinkles of the medium are present.

The input image 1600 shown in FIG. 16 includes the medium 1603. There are no wrinkles or unevenness on the left side portion of the medium 1603, and wrinkles are present on the right side portion. Therefore, in the input image 1600, the first region 1601 does not have wrinkles or unevenness of the medium 1603, and the second region 1602 has wrinkles 1604 of the medium 1603. The abnormality determination unit 221 can accurately determine whether or not there are wrinkles or unevenness in the medium by using the machine learning technique or the pattern matching technique.

When the abnormality determination unit 221 determines that no abnormality exists in each of the specified regions, the process proceeds to step S606.

On the other hand, when the abnormality determination unit 221 determines that an abnormality exists in each of the specified regions, the correction unit 222 corrects the image information in the region of the input image determined by the abnormality determination unit 221 to have an abnormality (). Step S605). The correction unit 222 corresponds to a region of the input image in which the abnormality determination unit 221 has not determined that an abnormality exists, that is, a portion in which the medium has not been determined to be lifted by the first lift determination unit 153. The image information in the area of the input image is not corrected.

When the abnormality determination unit 221 determines that there is a chip in the medium, the correction unit 222 corrects the image information in the region of the input image determined to have the chip in the medium so as to repair the chip in the medium. .. The correction unit 222 stretches each straight line so that the two straight lines corresponding to the corners determined to be chipped in the medium intersect (the gradation value of each pixel on the extension line of each straight line is set on each straight line. Set to the average value of the pixel gradation values). Further, the correction unit 222 sets the gradation value of the pixel corresponding to the edge pixel connected between the ends of the straight lines to the average value of the gradation value of the background of the medium. As a result, in the input image 1500 shown in FIG. 15A, the straight line 1505 and the straight line 1506 intersect to form a corner at the lower right of the medium 1503, and the straight line due to the crease portion 1509 and the folded end portion 1510 is removed. ..

Further, when the abnormality determination unit 221 determines that the irregular shape of the medium exists, the correction unit 222 uses the image information in the region of the input image determined to have the irregular shape of the medium so as to remove the irregular shape of the medium. to correct. The correction unit 222 sets the gradation values of the pixels in the region (the region corresponding to the rectangular candidate whose size is within a predetermined range) determined to have a variant of the medium to the average value of the gradation values of the background of the medium. Set. As a result, in the input image 1520 shown in FIG. 15B, the variant 1524 is removed.

Further, when the abnormality determination unit 221 determines that the irregular shape of the medium exists, the correction unit 222 may cut out the irregular shape of the medium to generate a cut-out image. In this case, the display control unit 223 may store the cut-out image in the second storage device 210 and display it in the second display device 202. As a result, for example, when a photograph or the like is attached to a medium, the information processing apparatus 200 can generate and display an image obtained by cutting out only the photograph portion.

Further, when the abnormality determination unit 221 determines that the curl of the medium is present, the correction unit 222 uses the image information in the region of the input image determined to have the curl of the medium so as to remove the curl of the medium. to correct. The correction unit 222 uses a known geometric transformation such as an affine transformation to execute an image conversion process so that each pixel on the side whose end is determined to be bent is arranged on an approximate straight line. ..

When the tip of the medium is curled in a direction away from the image pickup device 122, the distance between the tip end and the light source of the image pickup device 122 becomes large, and the peripheral region of the tip end may be darkened in the input image. .. On the contrary, when the tip of the medium is curled in the direction approaching the imaging device 122, the distance between the tip and the light source of the imaging device 122 becomes small, and the peripheral region of the tip can be brightened in the input image. There is sex. Therefore, the correction unit 222 converts the gradation value of the pixels around the end of the side determined to be bent by using a known gradation conversion technique such as gamma correction. When the abnormality determination unit 221 determines that the tip of the medium is curled in the direction away from the image pickup apparatus 122, the correction unit 222 sets the gamma value so that the gamma value is smaller than 1 and closer to the tip. Then, gamma correction is executed. On the other hand, when the abnormality determination unit 221 determines that the tip of the medium is curled in the direction approaching the image pickup apparatus 122, the correction unit 222 increases the gamma value so that the gamma value is larger than 1 and closer to the tip. To perform gamma correction.

As a result, in the input image 1540 shown in FIG. 15C, the straight line 1545 and each peripheral edge pixel 1548 and the straight line 1546 intersect so as to be orthogonal to each other to form a right angle at the lower right portion of the medium 1543, and each peripheral edge pixel 1548 is formed. The shadow around the is removed. Further, in the input image 1560 shown in FIG. 15D, the straight line 1565 and each peripheral edge pixel 1568 and the straight line 1566 intersect so as to be orthogonal to each other to form a right angle at the lower right portion of the medium 1563, and each peripheral edge pixel 1568 is formed. The surrounding brightness is corrected.

When the abnormality determination unit 221 determines that the medium has wrinkles or unevenness, the correction unit 222 determines that the medium has wrinkles or unevenness so as to remove the wrinkles or unevenness of the medium. Correct the image information in the area. The correction unit 222 applies a known smoothing filter such as an averaging filter or a Gaussian filter to a region determined to have wrinkles or unevenness in the medium. As a result, the wrinkles 1604 are removed in the input image 1600 shown in FIG.

Next, the display control unit 223 stores the input image in the second storage device 210 and displays it on the second display device 202 (step S606), and ends a series of steps. The correction unit 222 may display the input image on the second display device 202 when the display instruction is input by the user using the second operation device 201. Further, the correction unit 222 may transmit the input image to another device via the second interface device 203 instead of or in addition to displaying the input image on the second display device 202.

In the medium transfer device 100, the sensors for detecting the floating of a plurality of parts of the medium mounted on the mounting table 103 are not limited to the first sensor 111 and the second sensor 112. The medium transfer device 100 may have three or more sensors for detecting the floating of three or more parts of the medium. In that case, the sensors are provided so as to irradiate, for example, the same position in the medium transport direction A1 and different positions in the width direction A2. The abnormality determination unit 221 divides the input image into three or more regions including a portion corresponding to the position of the medium irradiated with light by each sensor, and determines whether or not an abnormality exists. The sensors may be provided so as to irradiate different positions in the medium transport direction A1. In that case, the abnormality determination unit 221 divides the input image not only in the horizontal direction but also in the vertical direction so as to include a portion corresponding to the position of the medium irradiated with light by each sensor, and an abnormality exists. It may be determined whether or not. As a result, the abnormality determination unit 221 can further divide the input image and determine the presence or absence of an abnormality, and can determine the presence or absence of an abnormality in a shorter time.

As described in detail above, the image processing system 1 is abnormal only in the region of the input image including the portion determined by the first sensor 111 and the second sensor 112 that the medium is lifted. Determine the presence or absence and correct. As a result, the image processing system 1 does not need to determine the presence or absence of an abnormality in the entire input image, and can determine and correct the presence or absence of an abnormality only in a region where the abnormality is likely to exist. .. Therefore, the image processing system 1 can correct the input image in which the abnormality exists in a shorter time.

In particular, the image processing system 1 can estimate a region in the input image where an abnormality is likely to exist based on the state of the medium before the image pickup apparatus 122 reads the image, and the input image has an abnormality. It has become possible to determine whether or not it is possible at an earlier stage. In addition, the user can confirm the generated image earlier, and the image processing system 1 can improve the convenience of the user. Further, the image processing system 1 can reduce the processing load on the image processing by determining and correcting the presence or absence of the abnormality only in the area where the abnormality is likely to exist, and as a result, the image processing system 1 can reduce the processing load. It has become possible to reduce the power consumption of image processing.

Further, in the image processing system 1, even if the image is lifted at the edge of the medium, when the possibility of jamming of the medium is low, the input image may have an abnormality while continuing the transport of the medium. Corrects the input image. As a result, the image processing system 1 can generate a good input image while suppressing an increase in the total time required for the medium reading process even when a part of the medium is lifted and conveyed.

FIG. 17 is a flowchart showing an example of the operation of the medium reading process of the medium conveying device according to another embodiment. The medium reading process shown in FIG. 17 is executed in place of the medium reading process shown in FIG. When the medium reading process shown in FIG. 17 is executed, the first processing circuit 150 of the medium transfer device 100 replaces the second processing circuit 220 of the information processing device 200 with an abnormality determination unit, a correction unit, and a display control unit. Have. Since the processing of steps S701 to S710 and S713 to S714 of the flowchart shown in FIG. 17 is the same as the processing of steps S101 to S110 and S112 to S113 of the flowchart shown in FIG. 8, detailed description thereof will be omitted. Hereinafter, only steps S711 to S712 will be described.

In step S711, the abnormality determination unit, the correction unit, and the display control unit of the first processing circuit 150 execute image processing (step S711). This image processing is similar to the image processing shown in FIG. However, in this case, in step S606, the correction unit stores the input image in the first storage device 140 and displays it on the first display device 106.

Next, the image generation unit 152 transmits the input image to the information processing device 200 via the first interface device 132 (step S712). When the second processing circuit 220 of the information processing device 200 receives the input image from the medium transfer device 100 via the second interface device 203, the second processing circuit 220 stores the received input image in the second storage device 210 and displays the second display. Displayed on the device 202.

As described in detail above, the image processing system can correct the input image in which the abnormality exists in a shorter time even when the medium transport device has the abnormality determination unit, the correction unit, and the display control unit. ..

The first processing circuit 150 of the medium transfer device 100 may have an abnormality determination unit, and the second processing circuit 220 of the information processing device 200 may have a correction unit and a display control unit. In that case, the abnormality determination unit of the first processing circuit 150 executes the processes of the image processing steps S601 to S604 shown in FIG. 14, and inputs the input image and the abnormality determination result via the first interface device 132. It is transmitted to the information processing device 200. The correction unit of the second processing circuit 220 receives the input image and the abnormality determination result from the medium transfer device 100 via the second interface device 203, and according to the received abnormality determination result, the process of step S605 in FIG. To execute. Then, the display control unit of the second processing circuit 220 executes the processing of step S606 of FIG.

FIG. 18 is a diagram showing a schematic configuration of a first processing circuit 350 in a medium transfer device according to another embodiment. The first processing circuit 350 is used in place of the first processing circuit 150 of the medium transfer device 100, and instead of the first processing circuit 150, the medium reading process, the edge lift determination process, the central lift determination process, and the double feed. The determination process and the skew determination process are executed. The first processing circuit 350 includes a control circuit 351, an image generation circuit 352, a first floating determination circuit 353, a second floating determination circuit 354, a double feed determination circuit 355, a skew determination circuit 356, and the like. Each of these parts may be composed of independent integrated circuits, microprocessors, firmware, and the like.

The control circuit 351 is an example of the control unit, and has the same function as the control unit 151. The control circuit 351 receives an operation signal from the first operation device 105, a third medium signal from the third sensor 114, and a fourth medium signal from the fourth sensor 117, and receives first and second media signals from the first storage device 140. Read the lift flag, center lift flag, double feed flag, and skew flag. The control circuit 351 outputs a control signal to the motor 131 so as to control the transport of the medium according to the received or read information.

The image generation circuit 352 is an example of the image generation unit, and has the same function as the image generation unit 152. The image generation circuit 352 receives a line image from the image pickup device 122, generates an input image, and stores it in the first storage device 140. The image generation circuit 352 reads the first floating flag and the second floating flag from the first storage device 140, and transmits the input image together with the input image to the information processing device via the first interface device 132.

The first lift determination circuit 353 is an example of the first lift determination unit, and has the same function as the first lift determination unit 153. The first floating determination circuit 353 receives the first medium signal from the first sensor 111 and the second medium signal from the second sensor 112, and whether the floating occurs at the end of the medium based on each received signal. Judge whether or not. The first floating determination circuit 353 stores the first and second floating flags in the first storage device 140.

The second lift determination circuit 354 is an example of the second lift determination unit, and has the same function as the second lift determination unit 154. The second floating determination circuit 354 receives a movement amount signal from the movement sensor 113, determines whether or not a floating amount has occurred in the central portion of the medium based on the received movement amount signal, and sets the central floating amount flag to the first. Store in the storage device 140.

The double feed determination circuit 355 is an example of the double feed determination unit, and has the same function as the double feed determination unit 155. The double feed determination circuit 355 receives an ultrasonic signal from the ultrasonic sensor 118, determines whether or not double feed of the medium has occurred based on the received ultrasonic signal, and sets the double feed flag in the first storage device. Store in 140.

The skew determination circuit 356 is an example of the skew determination unit, and has the same function as the skew determination unit 156. The skew determination circuit 356 receives the fifth medium signal from the fifth sensor 121 and the line image from the image pickup apparatus 122, determines whether or not the medium is skewed based on each received information, and determines whether or not the medium is skewed, and the skew flag Is stored in the first storage device 140.

FIG. 19 is a diagram showing a schematic configuration of a second processing circuit 420 in the information processing apparatus according to another embodiment. The second processing circuit 420 is used in place of the second processing circuit 220 of the information processing apparatus 200, and performs image processing in place of the second processing circuit 220. The second processing circuit 420 includes an abnormality determination circuit 421, a correction circuit 422, a display control circuit 423, and the like. Each of these parts may be composed of independent integrated circuits, microprocessors, firmware, and the like.

The abnormality determination circuit 421 is an example of the abnormality determination unit, and has the same function as the abnormality determination unit 221. The abnormality determination circuit 421 receives the input image and the first and second floating flags from the medium transfer device via the second interface device 203, and stores them in the second storage device 210. Further, the abnormality determination circuit 421 determines whether or not an abnormality exists in each region of the input image based on each received information, and stores the determination result in the second storage device 210.

The correction circuit 422 is an example of a correction unit, and has the same function as the correction unit 222. The correction circuit 422 reads the input image, the first and second floating flags, and the determination result of the abnormality from the second storage device 210, corrects the input image based on the read information, and stores it in the second storage device 210. ..

The display control circuit 423 is an example of the display control unit, and has the same function as the display control unit 223. The display control circuit 423 reads an input image from the second storage device 210, and displays the read input image on the second display device 202.

Instead of the second processing circuit of the information processing device, the first processing circuit of the medium transfer device may include an abnormality determination circuit, a correction circuit, and / or a display control circuit.

As described in detail above, the image processing system can correct the input image in which an abnormality exists in a shorter time even when the first processing circuit 350 and the second processing circuit 420 are used.

1 image processing system, 100 medium transfer device, 103 mounting table, 111 first sensor, 112 second sensor, 115 feed roller, 116 brake roller, 119 first transfer roller, 120 second transfer roller, 152 image generator, 153 1st lift judgment unit, 200 information processing device, 221 abnormality judgment unit, 222 correction unit

Claims (7)

A mounting table on which the medium is placed and
A transport unit that transports the medium placed on the above-mentioned stand, and
A plurality of sensors for detecting the floating of a plurality of parts of the medium mounted on the above-mentioned stand, and
Based on the output signals from the plurality of sensors, a lift determination unit that determines whether or not the medium is lifted in any part of the plurality of parts, and a lift determination unit.
An image generation unit that generates an input image in which the medium conveyed by the transfer unit is captured, and an image generation unit.
An abnormality determination unit that determines whether or not an abnormality exists in the area of the input image including a portion that is determined by the floating determination unit that the medium has been lifted.
A correction unit that corrects image information in the area of the input image determined by the abnormality determination unit to have an abnormality, and a correction unit.
A medium transfer device characterized by having. The medium transfer device according to claim 1, wherein the plurality of sensors output signals as output signals according to the distances from the plurality of sensors to a plurality of parts of the medium mounted on the above-mentioned stand. The plurality of sensors
As the output signal, a first sensor that outputs a signal corresponding to a distance from the center position of the medium mounted on the above-mentioned table to a portion on one side in a direction orthogonal to the medium transport direction, and a first sensor.
The output signal includes a second sensor that outputs a signal according to a distance from a central position in the medium mounted on the above-mentioned table to a portion on the other side in a direction orthogonal to the medium transport direction. , The medium transfer device according to claim 1 or 2. The medium transfer device according to any one of claims 1 to 3, wherein the abnormality is chipping, irregular shape, curl, wrinkles or unevenness of the medium. An image processing system having a medium transfer device and an information processing device.
The medium transfer device
A mounting table on which the medium is placed and
A transport unit that transports the medium placed on the above-mentioned stand, and
A plurality of sensors for detecting the floating of a plurality of parts of the medium mounted on the above-mentioned stand, and
Based on the output signals from the plurality of sensors, a lift determination unit that determines whether or not the medium is lifted in any part of the plurality of parts, and a lift determination unit.
It has an image generation unit that generates an input image in which the medium conveyed by the transfer unit is captured.
Either the medium transfer device or the information processing device
An abnormality determination unit that determines whether or not an abnormality exists in the area of the input image including a portion that is determined by the floating determination unit that the medium has been lifted.
A correction unit that corrects image information in the area of the input image determined by the abnormality determination unit to have an abnormality, and a correction unit.
An image processing system characterized by having. A pedestal on which the medium is placed, a transport unit for transporting the medium mounted on the pedestal described above, and a plurality of sensors for detecting the floating of a plurality of parts of the medium mounted on the pedestal described above. It is a control method of an image processing system having a medium transport device having the same.
Based on the output signals from the plurality of sensors, it is determined whether or not the medium is lifted in any part of the plurality of parts.
An input image in which the medium transported by the transport unit is captured is generated.
It is determined whether or not there is an abnormality in the region of the input image including the portion where the floating of the medium is determined to occur.
The image information in the area of the input image determined to have the abnormality is corrected.
A control method characterized by that. A pedestal on which the medium is placed, a transport unit for transporting the medium mounted on the pedestal described above, and a plurality of sensors for detecting the floating of a plurality of parts of the medium mounted on the pedestal described above. It is a control program of the medium transport device that it has.
Based on the output signals from the plurality of sensors, it is determined whether or not the medium is lifted in any part of the plurality of parts.
An input image in which the medium transported by the transport unit is captured is generated.
It is determined whether or not there is an abnormality in the region of the input image including the portion where the floating of the medium is determined to occur.
The image information in the area of the input image determined to have the abnormality is corrected.
A control program characterized by causing the medium transfer device to execute the above.

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