JP7390919B2 - Code symbol reader and program - Google Patents

Description

Embodiments of the present invention relate to a code symbol reading device and a program.

Code symbol reading devices that read barcodes, two-dimensional codes, etc. printed on paper media (an example of code symbols) and barcodes and two-dimensional codes, etc. displayed on the display screen of mobile terminals, etc. In order to read both barcodes, two-dimensional codes, etc. displayed on the display screen of mobile terminals, etc., there is a technology that can be used to switch the lighting ON/OFF. It is being

However, in the case where the lighting is automatically switched on and off after a certain period of time, if the ratio of the time for reading with the light ON and the time for reading with the light OFF is fixed, for example, The reading environment has changed from an environment where a high proportion of barcodes and 2D codes printed on paper media are read to an environment where a high proportion of barcodes and 2D codes displayed on display screens of mobile terminals etc. are read. In this case, there is a risk that the reading efficiency will decrease.

The problem to be solved by the present invention is to automatically determine the reading priority of a code symbol printed on a paper medium and a code symbol displayed on a display screen of a mobile terminal, etc., and improve reading efficiency. An object of the present invention is to provide a code symbol reading device and a program that can read code symbols.

The code symbol reading device of the embodiment includes: an imaging unit that captures an image of an object; an illumination unit that irradiates the object with light; a first mode that irradiates the object with light; and a first mode that irradiates the object with light. a second mode in which the light is not irradiated; When the sum of the first number of successes and the second number of successes, which is the number of times of success in recognizing the object based on the image captured by the imaging unit in the second mode, is equal to or greater than the specified number of times, the A ratio changing unit that changes a time ratio between the first mode and the second mode based on the first number of successes and the second number of successes . Further, when the first number of successes is greater than the second number of successes, the ratio changing unit increases the time ratio of the first mode, and increases the time ratio of the first mode to the second number of successes than the first number of successes. If the number of successes is large, the time ratio of the second mode is increased.

FIG. 1 is a perspective view showing the overall configuration of a POS system. FIG. 2 is a diagram for explaining an example of the configuration of the reading device. FIG. 3 is a diagram showing an example of the hardware configuration of the reading device. FIG. 4 is a diagram showing an example of the functional configuration of the reading device. FIG. 5 is a diagram showing an example of a ratio change table. FIG. 6 is a flowchart showing an example of the operation of the reading device.

The code symbol reading device and program according to this embodiment will be explained below. In the following embodiment, an example of application to a POS (Point Of Sales) system installed in a retail store will be described, but the present invention is not limited to this embodiment.

(Overall configuration of POS system)
FIG. 1 is a perspective view showing the overall configuration of a POS system 1. As shown in FIG. A POS (Point Of Sales) system 1 includes a reading device 10 and a POS terminal 20 that executes data processing based on data read by the reading device 10. The reading device 10 is an example of a "code symbol reading device."

The reading device 10 is installed upright at a location (approximately in the center) where an operator and a customer substantially face each other on a soccer table 2 on which a shopping cart containing products or the like is placed. The POS terminal 20 is provided near one end of the soccer table 2. The reading device 10 and the POS terminal 20 are communicably connected via a transmission path (not shown). The reading device 10 and the POS terminal 20 constitute a POS system 1.

The POS terminal 20 executes sales data processing, including registration processing for products purchased by customers, payment processing, etc., based on data on products etc. read by the reading device 10. The POS terminal 20 is installed on a drawer 30 that stores coins and banknotes in a freely removable manner. The POS terminal 20 includes two displays 21 (211, 212), one for an operator and one for a customer, an input device 22 including a keyboard and keys, and a receipt printer 23.

(Configuration of reading device)
Next, the configuration of the reading device 10 will be explained. FIG. 2 is a diagram for explaining an example of the configuration of the reading device 10. Here, FIG. 2 shows the reading device 10 viewed from the side where the imaging window 111 is provided (the side where the operator stands).

The reading device 10 includes a main body section 11, an imaging section 12, an illumination section 13, a first display section 14, a keyboard 15, a second display section 16, and the like.

The main body portion 11 is formed into a substantially rectangular parallelepiped shape and is erected on the soccer table 2 . It is preferable that the height of the main body part 11 be approximately the same as the operator's eye level on the soccer table 2, for example.

An imaging window 111 serving as an opening is provided on the side of the main body 11 where the operator stands. Inside the imaging window 111, an imaging section 12 and an illumination section 13 are installed. The operator scans (images) the product brought by the shopper by holding it over the imaging window 111.

The imaging unit 12 includes an imaging element such as a CCD (Charge Coupled Device) or a CMOS (Complementary MOS), and an imaging lens. The imaging lens forms an image of the imaging area on the imaging element. The imaging area refers to an area where an image is formed from the imaging window 111 through the imaging lens to the area of the imaging device.

The imaging unit 12 images the outside of the main body 11 through the imaging window 111 . For example, the imaging unit 12 optically images a barcode, two-dimensional code, or the like printed on a paper medium. Further, for example, the imaging unit 12 optically images a barcode, two-dimensional code, or the like displayed on a display screen of a mobile terminal or the like owned by the customer. Note that barcodes, two-dimensional codes, and the like are examples of "code symbols."

Here, barcodes, two-dimensional codes, etc. printed on paper media contain data such as product identifiers (product codes) and prices encoded in the barcodes, two-dimensional codes, etc. shall be taken as a thing.

In addition, barcodes and two-dimensional codes displayed on the display screen of mobile terminals etc., for example, contain data representing discounts and discount coupons encoded in the barcodes and two-dimensional codes. shall be retained. Note that, when data representing a coupon or the like is read by the reading device 10, the POS terminal 20 executes processing such as a discount or a discount based on the data.

The illumination section 13 has a light source. The light source of the illumination unit 13 is arranged around the imaging lens of the imaging unit 12. The illumination unit 13 irradiates a target object with light by turning on a light source. Note that the light source is, for example, an LED, a cold cathode tube, a fluorescent lamp, an incandescent lamp, or the like.

The first display unit 14 is a display device for an operator, and is provided above the imaging window 111. The first display unit 14 is a display device with a touch panel configured of a display device such as an LCD (Liquid Crystal Display). The first display unit 14 displays the product name, price, etc. of the registered product to the operator in accordance with the sales registration process by the POS terminal 20.

The keyboard 15 is provided near (on the side) of the first display section 14 . The keyboard 15 has various keys for registering products that cannot be registered using barcodes, two-dimensional codes, or object images. Although FIG. 2 shows an example in which the first display section 14 and the keyboard 15 are provided integrally, they may be provided separately.

The second display unit 16 is a display device with a touch panel that is configured of a display device such as an LCD. The second display unit 16 displays the product name, price, etc. of the registered product to the shopper in accordance with the sales registration process by the POS terminal 20. In this embodiment, the second display section 16 is held on the side of the main body section 11 by a holding member (not shown), but the present invention is not limited to this structure.

(Hardware configuration of reading device)
Next, the hardware configuration of the reading device 10 will be explained. FIG. 3 is a diagram showing an example of the hardware configuration of the reading device 10. The reading device 10 is equipped with a microcomputer 101, and the microcomputer 101 drives and controls each part.

The microcomputer 101 includes a CPU 102, a ROM 104, a RAM 105, an input/output controller 106, a lighting drive circuit 107, a display/keyboard controller 108, a storage section 109, and a communication interface 110. Each component is connected via a bus line 103.

A CPU (Central Processing Unit) 102 centrally controls each part. A ROM (Read Only Memory) 104 stores fixed information such as a control program in advance. A RAM (Random Access Memory) 105 rewritably stores various data and functions as a work area or the like.

Therefore, the microcomputer 101 constitutes an information processing section that executes information processing. All or part of the RAM 105 is nonvolatile memory.

The input/output controller 106 is connected to the imaging section 12. The input/output controller 106 outputs the image (image data) captured by the imaging unit 12 to the microcomputer 101. Further, the input/output controller 106 outputs a control signal output from the microcomputer 101 to the imaging section 12.

The lighting drive circuit 107 is connected to the lighting section 13. The lighting drive circuit 107 controls turning on and off of the light source of the lighting section 13 under the control of the CPU 102.

The display/keyboard controller 108 drives and controls the first display section 14 and the second display section 16 to display various images on the display 21. Further, the display/keyboard controller 108 outputs operation signals associated with touch operations on the first display section 14 and the second display section 16 and operation signals from the keyboard 15 to the microcomputer 101.

The storage unit 109 is a storage device such as an HDD (Hard Disk Drive) or an SSD (Solid State Drive). The storage unit 109 stores various programs and various data related to the operation of the reading device 10. The communication interface 110 enables data communication with other devices (POS terminal 20) via a connection line such as a LAN cable.

(Function of reading device)
Next, the functional configuration of the reading device 10 will be described with reference to FIG. 4. FIG. 4 is a diagram showing an example of the functional configuration of the reading device 10. The reading device 10 includes a first acquisition section 121, a decoding section 122, a determination section 123, a counting section 124, a lighting control section 125, a second acquisition section 126, and a ratio changing section 127 as functional components.

More specifically, the reading device 10 has the above functional configuration as a software configuration through cooperation between the CPU 102 and a program stored in the storage unit 109. Note that part or all of the above functional configuration may be realized by a hardware configuration such as the CPU 102 or a dedicated circuit.

The first acquisition unit 121 acquires an image captured by the imaging unit 12. Specifically, when the first acquisition unit 121 is instructed to start a transaction by an operation via the keyboard 15 or the first display unit 14 or by a signal notified from the POS terminal 20, the first acquisition unit 121 receives an instruction via the input/output controller 106 to start a transaction. , starts capturing image data captured by the imaging unit 12.

Further, when the first acquisition unit 121 is instructed to end the transaction by operating the keyboard 15 or the first display unit 14 or by a signal notified from the POS terminal 20, the first acquisition unit 121 stops capturing image data.

The decoding unit 122 decodes coded information included in the image acquired by the first acquisition unit 121. In this embodiment, the decoding unit 122 extracts encoded information by decoding the information.

Specifically, the decoding unit 122 detects an area representing a barcode, two-dimensional code, etc. from the image data acquired by the first acquisition unit 121, and decodes the encoded area held by the barcode, two-dimensional code, etc. Perform processing to decode data. Further, the decoding unit 122 outputs the extracted data to the POS terminal 20 or the like by decoding encoded data held by a barcode, two-dimensional code, or the like.

The determination unit 123 determines whether recognition of the target object based on the image has been successful. In the present embodiment, the determining unit 123 determines whether recognition of the target object based on the image has been successful by determining whether decoding of the image captured by the imaging unit 12 has been successful.

Note that successful decoding of an image can also mean successful recognition of code symbols included in the image. Since a code symbol is an object to be read, decoding an image can be said to be an example of "recognition of an object based on an image."

Specifically, if data can be read from the image captured by the imaging unit 12, the determination unit 123 determines that the decoding of the image captured by the imaging unit 12 has been successful. On the other hand, if data cannot be read from the image captured by the imaging unit 12, the determination unit 123 determines that the decoding of the image captured by the imaging unit 12 has failed.

Note that the definition of decoding failure is not limited to the above example. For example, even if data can be read from a code symbol, if the format of the data is different from a specified format, it may be determined that decoding has failed.

The counting unit 124 counts and resets various times. In this embodiment, the counting unit 124 includes the number of times of imaging in the first mode, the number of times of imaging in the second mode, the number of successful decodings of images captured in the first mode, and the number of successful decodings of images captured in the second mode. Count and reset the number of times.

Specifically, when a transaction is started, the counting unit 124 resets the number of times of imaging in the first mode, and each time the imaging unit 12 performs one imaging in the first mode, the counting unit 124 resets the number of times of imaging in the first mode. Increase the number of images taken by 1. If the decoding by the decoding unit 122 is successful, the number of successful decodings of the image captured in the first mode is increased by 1.

Further, when the number of times of imaging in the first mode reaches a prescribed number of times, the counting unit 124 resets the number of times of imaging in the second mode, and each time the imaging unit 12 performs imaging once in the second mode, the number of times of imaging in the second mode is reset. The number of times of imaging in mode 2 is increased by 1. If the decoding by the decoding unit 122 is successful, the number of successful decodings of the image captured in the second mode is increased by 1.

The number of times of imaging in the second mode reaches a specified number of times, and the sum of the number of successful decoding times of images captured in the first mode and the number of successful decoding of images captured in the second mode becomes equal to or greater than the specified number of times, which will be described later. When the ratio changing unit 127 changes the time ratio between the first mode and the second mode, the counting unit 124 calculates the number of successful decodings of images captured in the first mode and the number of successful decodings of images captured in the second mode. Reset the number of successful image decodes.

Note that the counting unit 124 resets the number of times of imaging in the first mode when the number of times of imaging in the second mode reaches the prescribed number of times, regardless of whether the time ratio has been changed by the ratio changing unit 127.

The illumination control unit 125 controls the illumination unit 13 to emit light so as to repeat a first mode in which the object is irradiated with light and a second mode in which the object is not irradiated with light.

In this embodiment, the lighting control unit 125 controls turning on and off of the light source of the lighting unit 13 via the lighting drive circuit 107. Specifically, the illumination control unit 125 lights up the light source of the illumination unit 13 and performs control so that when the user holds the object to be read in front of the imaging window 111, the object to be read is irradiated with light. Thereby, the imaging unit 12 can image the object to be read in the first mode in which the object to be read is irradiated with light.

Further, the illumination control unit 125 turns off the light source of the illumination unit 13 and performs control so that when the user holds the object to be read in front of the imaging window 111, the object to be read is not irradiated with light. Thereby, the imaging unit 12 can image the object to be read in the second mode in which the object to be read is not irradiated with light.

Further, the lighting control unit 125 controls the light source of the lighting unit 13 to alternately turn on the light source for a certain period of time and turn off the light for a certain period of time. Specifically, the lighting control unit 125 turns on the light source of the lighting unit 13, maintains the lighting state until the imaging unit 12 captures a prescribed number of times, and then turns off the light source of the lighting unit 13. , the control for maintaining the light-off state is alternately repeated until the imaging unit 12 captures images a predetermined number of times.

Thereby, the imaging unit 12 can image the object to be read in both the first mode and the second mode. Here, in this embodiment, the first mode functions as a mode for reading barcodes, two-dimensional codes, etc. printed on paper media, and the second mode functions as a mode for reading barcodes, two-dimensional codes, etc. printed on paper media, and the second mode functions as a mode for reading barcodes, two-dimensional codes, etc. printed on paper media. It functions as a mode for reading barcodes, two-dimensional codes, etc.

In the present embodiment, the prescribed number of times that the imaging unit 12 images the object to be read in the first mode and the prescribed number of times that the image sensing unit 12 images the object to be read in the second mode are determined by the ratio changing unit 127. changes automatically at regular intervals.

The second acquisition unit 126 acquires the number of successful target object recognitions based on images captured in the first mode and the number of successful target object recognitions based on images captured in the second mode.

In this embodiment, the second acquisition unit 126 detects that when the number of times of image capturing in the first mode and the number of times of image capturing in the second mode reach a specified number of times, the number of times of successful decoding of images captured in the first mode and the number of times of successful decoding of images captured in the first mode and the number of times of successful decoding of images captured in the first mode are When the sum of the number of times of successful decoding of the image taken in the first mode and the number of successful decoding of the image taken in the first mode is equal to or more than the prescribed number of times, the number of successful decoding of the image taken in the first mode and the number of successful decoding of the image taken in the second mode are acquired.

The ratio changing unit 127 determines the number of times the object has been successfully recognized based on the image taken by the imaging unit 12 in the first mode and the number of times the object has been successfully recognized based on the image taken by the imaging unit 12 in the second mode. The time ratio between the first mode and the second mode is changed based on .

In the present embodiment, when the sum of the number of times of successful decoding of the image captured in the first mode and the number of successful decoding of the image captured in the second mode is equal to or greater than the specified number of times, the ratio changing unit 127 If the number of successful decodings of images captured in the first mode is greater than the number of successful decodings of images captured in the first mode, increase the time ratio of the first mode and decode the images captured in the first mode. If the number of successful decodings of images captured in the second mode is greater than the number of successful decodings, the time ratio of the second mode is increased.

Here, the change of the time ratio of the first mode and the time ratio of the second mode by the ratio change unit 127 will be described in detail.

For example, when the sum of the number of successful decodings of images captured in the first mode and the number of successful decodings of images captured in the second mode exceeds a predetermined number of times, the ratio changing unit 127 changes the ratio to the second obtaining unit. Refer to the number of successful decodings of images captured in the first mode and the number of successful decodings of images captured in the second mode acquired by 126, and the ratio change table stored in the storage unit 109 of the reading device 10. Then, the time ratio between the first mode and the second mode is changed.

FIG. 5 is a diagram showing an example of a ratio change table. In this embodiment, the ratio change table includes a condition for the difference between the number of successful decodings of images captured in the first mode and the number of successful decodings of images captured in the second mode, and a condition for the difference between the number of successful decodings of images captured in the first mode and This is a table that associates modes with time ratios.

In this example, for example, the period of imaging in the first mode is 15 frames, the period of imaging in the second mode is 15 frames, and the object to be read is being imaged. If the difference between the number of successful decodings of the image captured in the second mode and the number of successful decodings of the image captured in the second mode exceeds 2, the imaging period in the first mode is set to 20 frames, and the imaging is performed in the second mode. Change the ratio to a period of 10 frames.

Note that the method of changing the time ratio between the first mode and the second mode by the ratio changing unit 127 is not limited to this.

For example, the ratio change table sets the conditions for the difference between the number of successful decodings of images captured in the first mode and the number of successful decodings of images captured in the second mode as "-2≦X-Y≦2, 2 <X-Y≦6, 6<X-Y, -2>X-Y≧-6, -6>X-Y", the period of imaging in the first mode and the period of imaging in the second mode The ratio may be subdivided into "15:15, 20:10, 25:5, 10:20, 5:25".

(Operation of reading device)
Next, the operation of the reading device 10 will be explained. FIG. 6 is a flowchart showing an example of the operation of the reading device.

First, when the start of a transaction is instructed by a signal notified from the keyboard 15 or the like, the counting unit 124 resets the number of times of imaging (hereinafter referred to as i) in the first mode (step S101). The lighting control unit 125 performs control to turn on the light source of the lighting unit 13 (step S102). The imaging unit 12 images the object to be read in the first mode (step S103).

The decoding unit 122 decodes the encoded information included in the image captured by the imaging unit 12, and the determining unit 123 determines whether the decoding by the decoding unit 122 is successful (step S104). If the decoding is successful (step S104: Yes), the counting unit 124 increments the number of successful decodings (hereinafter referred to as X) in the first mode by 1 (step S105). Furthermore, the counting unit 124 increments i by 1 (step S106).

Note that if the decoding fails (step S104: No), step S105 is skipped and only i is incremented by 1 (step S106). After that, the counting unit 124 checks whether or not i has reached a specified number of times (hereinafter referred to as A) (step S107). If i does not reach A (step S107: No), the processes from step S103 to step S107 are repeated until i reaches A.

When i reaches A (step S107: Yes), the counting unit 124 resets the number of times of imaging in the second mode (hereinafter referred to as j) (step S108). The lighting control unit 125 performs control to turn off the light source of the lighting unit 13 (step S109). The imaging unit 12 images the object to be read in the second mode (step S110).

The decoding unit 122 decodes the encoded information included in the image captured by the imaging unit 12, and the determining unit 123 determines whether the decoding by the decoding unit 122 is successful (step S121). If the decoding is successful (step S121: Yes), the counting unit 124 increments the number of successful decodings in the second mode (hereinafter referred to as Y) by 1 (step S122). Further, the counting unit 124 increments j by +1 (step S123).

Note that if the decoding fails (step S121: No), step S122 is skipped and only j is incremented by 1 (step S123). After that, the counting unit 124 checks whether j has reached a specified number of times (hereinafter referred to as B) (step S124). If j does not reach B (step S124: No), the processes from step S110 to step S124 are repeated until j reaches B.

If j has reached B (step S124: Yes), the counting unit 124 checks whether the sum of X and Y (hereinafter referred to as X+Y) has exceeded a specified number of times (hereinafter referred to as C). (Step S125).

If X+Y is equal to or greater than C (step S125: Yes), the second acquisition unit 126 acquires X and Y, and the ratio change unit 127 updates the values of A and B based on X and Y. (Step S126). Furthermore, the counting unit 124 resets X and Y (step S127). Then, the process returns to step S101 again, and the above process is repeated until the end of the transaction is instructed by a signal notified from the keyboard 15 or the like.

On the other hand, if X+Y is less than C (step S125: No), the ratio changing unit 127 does not update the values of A and B, and repeats the processing from step S101 to step S125 until X+Y becomes C or more.

(Effect of reading device)
Conventional code symbol reading devices can read both barcodes, two-dimensional codes, etc. printed on paper media and barcodes, two-dimensional codes, etc. displayed on the display screen of mobile terminals, etc. In addition, the object to be read was read by automatically switching ON/OFF of the illumination after a certain period of time.

However, in conventional code symbol reading devices, the ratio of the reading period with the illumination ON and the reading period with the illumination OFF is a fixed value. If you change from an environment where you often read barcodes or two-dimensional codes displayed on the display screen of a mobile device to an environment where you often read barcodes or two-dimensional codes displayed on the display screen of a mobile terminal, etc., the display screen of the mobile terminal etc. There is a high possibility of failure in reading barcodes and two-dimensional codes displayed on paper, and compared to an environment where barcodes and two-dimensional codes printed on paper media were often read, the reading of the target object is more difficult. It is considered that there is a high possibility that the success rate will decrease.

In other words, since the number of successful readings decreases, the time required for reading increases, and it is thought that the efficiency of reading decreases.

On the other hand, the reading device 10 of the present embodiment has two modes: the number of successful decodings of images taken of the object to be read in the first mode in which the object to be read is irradiated with light; The reading apparatus includes a ratio changing unit 127 that changes the time ratio between the first mode and the second mode based on the number of successful decodings of images of the object to be read in the mode.

In other words, if the number of times of successful decoding of the image captured in the first mode is greater than the number of successful decoding of the image captured in the second mode, the ratio changing unit 127 increases the time ratio of the first mode, If the number of successful decodings of images captured in the second mode is greater than the number of successful decodings of images captured in the first mode, changes are made at regular intervals, such as increasing the time ratio of the second mode. Is possible.

Here, the increase in the number of successful decodings of images captured in the first mode means that the number of situations in which barcodes, two-dimensional codes, etc. printed on paper media are being read is increasing; The increase in the number of successful decodings of images captured in this mode is considered to mean that the number of situations in which barcodes, two-dimensional codes, etc. displayed on the display screen of a mobile terminal or the like are being read is increasing.

Therefore, increasing the time ratio of the first mode means increasing the reading priority of barcodes, two-dimensional codes, etc. printed on paper media, and increasing the time ratio of the second mode. This is considered to mean increasing the reading priority of barcodes, two-dimensional codes, etc. displayed on the display screen of a mobile terminal or the like.

In other words, the reading device 10 of the present embodiment automatically determines the reading priority of code symbols printed on paper media and code symbols displayed on the display screen of a mobile terminal, etc., and improves reading efficiency. can be done.

Although the embodiment of the present invention has been described above, this embodiment is presented as an example and is not intended to limit the scope of the invention. This novel embodiment can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. This embodiment and its modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

For example, the program to be executed by the reading device 10 of the above embodiment is provided by being pre-installed in a storage medium (ROM 104 or storage unit 109) included in the reading device 10, but is not limited to this, and is provided in an installable format. Alternatively, it may be configured to be provided as an executable file recorded on a computer-readable recording medium such as a CD-ROM, flexible disk (FD), CD-R, or DVD (Digital Versatile Disk). .

Note that the storage medium is not limited to a medium independent of a computer or an embedded system, but also includes a storage medium in which a program transmitted via a LAN, the Internet, etc. is downloaded and stored or temporarily stored.

Further, the program executed by the reading device 10 of the embodiment described above may be stored on a computer connected to a network such as the Internet, and may be provided by being downloaded via the network. Further, the program executed by the reading device 10 of the above embodiment may be configured to be provided or distributed via a network such as the Internet.

1 POS system 2 Soccer table 10 Reading device 11 Main unit 12 Imaging unit 13 Lighting unit 14 First display unit 15 Keyboard 16 Second display unit 20 POS terminal 21 Display 22 Input device 23 Receipt printer 30 Drawer 101 Microcomputer 102 CPU
103 Bus line 104 ROM
105 RAM
106 Input/output controller 107 Lighting drive circuit 108 Display/keyboard controller 109 Storage unit 110 Communication interface 121 First acquisition unit 122 Decoding unit 123 Judgment unit 124 Counting unit 125 Lighting control unit 126 Second acquisition unit 127 Ratio changing unit

Japanese Patent Application Publication No. 2015-211368

Claims (4)

an imaging unit that captures an image of a target object;
an illumination unit that irradiates the object with light;
an illumination control unit that controls light irradiation by the illumination unit to repeat a first mode in which the target object is irradiated with light and a second mode in which the target object is not irradiated with light;
a first number of successes in recognizing the object based on the image captured by the imaging unit in the first mode; and recognition of the target based on the image captured by the imaging unit in the second mode. If the sum of the second number of successes, which is the number of successes of a ratio changing section that changes the time ratio with the mode;
Equipped with
When the first number of successes is greater than the second number of successes, the ratio changing unit increases the time ratio of the first mode, and increases the time ratio of the first mode to the second number of successes than the first number of successes. The code symbol reading device increases the time ratio of the second mode when the number of times is large . The number of times the image capturing unit captured an image in the first mode, the number of times the image capturing unit successfully recognized an object based on the image captured in the first mode, and the number of times the image capturing unit captured an image in the second mode. further comprising a counter that counts and resets the number of times the object has been successfully recognized based on the image captured by the imaging unit in the second mode;
The counting unit resets the number of times the imaging unit took images in the second mode when the number of times the imaging unit took images in the first mode reaches a specified number of times,
When the number of times the imaging unit has taken images in the second mode reaches a specified number of times, the number of times the imaging unit has taken images in the first mode is reset;
The code symbol reading device according to claim 1 . The first mode functions as a mode for reading code symbols printed on a paper medium, and the second mode functions as a mode for reading code symbols displayed on a display screen of a mobile terminal .
The code symbol reading device according to claim 1 or 2 . an imaging unit that captures an image of a target object;
an illumination unit that irradiates the object with light;
A code symbol reading device computer comprising:
an illumination control unit that controls light irradiation by the illumination unit to repeat a first mode in which the target object is irradiated with light and a second mode in which the target object is not irradiated with light;
a first number of successes in recognizing the object based on the image captured by the imaging unit in the first mode; and recognition of the target based on the image captured by the imaging unit in the second mode. If the sum of the second number of successes, which is the number of successes of a ratio changing section that changes the time ratio with the mode;
A program that functions as
When the first number of successes is greater than the second number of successes, the ratio changing unit increases the time ratio of the first mode, and increases the time ratio of the first mode to the second number of successes than the first number of successes. If the number of times is large, the program increases the time ratio of the second mode .

Images