JP4331774B2 - Scanner device - Google Patents

Description

  The present invention relates to a scanner device that reads a barcode attached to a product or the like for use in, for example, product management.

  A barcode is attached to the product for use in product management or the like. This bar code is attached with code information related to the product such as the type and price of the product. There has been proposed a technique in which a product with such a barcode attached is photographed by, for example, an image sensor, and code information related to the product is extracted from a barcode included in image data obtained by the photographing.

For example, in Patent Document 1, a bar code image is guided to a line sensor through an imaging lens, the bar code image is converted into an analog electric signal by the line sensor, and then an electric signal output from the line sensor is 2 It is disclosed that a binarization circuit converts a binarized signal and stores the binarized signal in a memory by a CPU. In Patent Document 1, a barcode illumination device for illuminating a barcode is provided with two types of illumination devices for long distance and for short distance, and detects the distance between the barcode and the imaging lens. It is disclosed to switch to a long-distance or short-distance illumination device according to the distance to ensure an appropriate illuminance for the barcode.
JP-A-7-67325

  Patent Document 1 detects the distance between the barcode and the imaging lens, and if this distance is short, for example, the short-distance lighting device is turned on, and if the distance is long, the long-distance lighting device is turned on. However, in some cases, an illuminance intermediate between the illuminances obtained by the short-distance and long-distance illumination devices is required. In such a case, the image data of the barcode obtained by photographing with the line sensor is, for example, insufficient illuminance or excessive illuminance of the illumination light that illuminates the barcode. For this reason, even if the code information regarding the product is decoded from the image data of the barcode, there is a possibility that it cannot be correctly decoded.

  An object of the present invention is to provide a scanner device capable of accurately and stably reading a barcode by performing illumination with an optimum illuminance corresponding to the distance between the barcode and the scanner device body.

A scanner device according to a main aspect of the present invention illuminates at least a barcode attached to a product with an illuminating unit, shoots at least the barcode with an imaging unit, and decodes the barcode from image information output from the imaging unit. In a scanner device that decodes the distance between the distance sensor that detects the distance between the barcode and the barcode detected by the distance sensor, and the distance between the distance sensor and the imaging unit And an illumination control unit that determines the distance between the imaging unit and the barcode and controls the illuminance at which the barcode is illuminated by the illumination unit according to the distance .

According to the present invention, it is possible to accurately and stably read a barcode by performing illumination with an optimum illuminance corresponding to the distance between the barcode and the scanner device body, and between the barcode and the scanner device body. Even when the distance between the image pickup units is different, it is possible to always illuminate with a constant illuminance regardless of the shooting distance to the image pickup unit, and the barcode image data acquired by the image pickup unit shooting is a product scanner device It is possible to provide a scanner device that does not have insufficient illuminance or excessive illuminance depending on the arrangement position with respect to the main body, and that can accurately and stably decode the code information related to the product from the barcode by the barcode decoder and can improve the usability. .

Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is an external configuration diagram of the scanner device. On the front surface 1a of the scanner apparatus body 1, an illumination unit 2, an image sensor 3 as a photographing unit, and an ultrasonic sensor 4 as a distance sensor are provided. On the front side of the scanner apparatus main body 1, the product 5 is held by, for example, an operator's hand, and is opposed to the front 1 a side of the scanner apparatus main body 1 by the movement of the operator's hand.

A sheet 7 on which a barcode 6 is printed is attached to the product 5. When the product 5 is opposed to the front surface 1a side of the scanner device main body 1, the position of the barcode 6 attached to the product 5 is adjusted by the movement of the operator's hand, and the product 5 is placed on the front surface of the scanner device main body 1. It arrange | positions so that it may face directly.
The illumination unit 2 emits illumination light toward the front of the scanner apparatus body 1. The illumination unit 2 has, for example, an illumination range that is substantially the same as the imaging range of the image sensor 3 or an illumination range that is larger than the imaging range of the image sensor 3. The illumination unit 2 always emits illumination light continuously. Or the illumination part 2 may radiate | emit illumination light discontinuously (intermittently), ie, may repeat lighting and extinction. As the illumination unit 2, for example, a lamp or the like whose amount of luminous flux to be radiated is changed according to the magnitude of the applied voltage or supply current is used.

  The image sensor 3 receives optical information of an image including a barcode 6 facing the front surface 1a of the scanner apparatus main body 1, that is, the product 5 on which the barcode 6 and a sheet 7 on which the barcode 6 is printed are attached. The optical information of the barcode 6 and the product 5 is converted into electrical information. Specifically, the image sensor 3 captures the barcode 6 and the product 5 and outputs image signals of the barcode 6 and the product 5.

  The ultrasonic sensor 4 detects a distance (hereinafter referred to as a measurement distance D) between the barcode 6 on the paper 7 attached to the product 5 facing the front surface 1a of the scanner device body 1, A distance detection signal corresponding to the measurement distance D is output. Specifically, for example, the ultrasonic sensor 4 transmits the ultrasonic wave 4a, receives the reflected wave 4b from the barcode 6 on the paper 7 attached to the product 5, and receives the reflected wave from the time when the ultrasonic wave 4a is transmitted. The measurement distance D between the barcode 6 is detected by the length of time until the reception of 4b. For example, the ultrasonic sensor 4 detects a distance from the barcode 6 in synchronization with the photographing operation of the image sensor 3. The distance detection range by the ultrasonic sensor 4 is substantially the same as the shooting range by the image sensor 3, or is set within the shooting range by the image sensor 3, for example. The shooting range by the image sensor 3 is a range in which the image sensor 3 is in focus, and is an area separated from the image sensor 3 by an appropriate distance.

FIG. 2 is a functional block diagram of the scanner device. The main control unit 8 includes a CPU, a RAM, a ROM, and an I / O port. The main control unit 8 is connected to the image sensor 3, the ultrasonic sensor 4, and the illumination drive circuit 9, and controls the operations of the image sensor 3, the ultrasonic sensor 4, and the illumination drive circuit 9.
For example, as shown in FIG. 3, the main control unit 8 outputs a synchronization signal s to the image sensor 3, the illumination drive circuit 9, and the ultrasonic sensor 4. The synchronization signal s becomes a high level at a predetermined timing, for example, every preset equal interval t. The main control unit 8 detects the measurement distance D between the barcode 6 and the ultrasonic sensor 4 by sending the synchronization signal s to the ultrasonic sensor 4 at every preset equal interval t. The main control unit 8 sends the synchronization signal s to the illumination drive circuit 9 to light the illumination unit 2 at the same interval as the preset equal interval t.

  Note that, for example, time e is required from when the synchronization signal s becomes high level to when the illumination unit 2 is turned on. This time e is determined, for example, by calculating the illuminance for illuminating the barcode 6 by the illumination unit 2 according to the measurement distance D between the barcode 6 detected by the ultrasonic sensor 4 by the illumination control unit 12 described later. This corresponds to the calculation time required for the operation.

  The main control unit 8 sends the synchronization signal s to the image sensor 3 to cause the image sensor 3 to perform an imaging operation at the same interval as the preset equal interval t. Thereby, the imaging operation of the image sensor 3 and the lighting operation of the illumination unit 2 are synchronized.

The image sensor 3 is provided with a lens 10. The image sensor 3 enters an image of the barcode 6 attached to the product 5 imaged by the lens 10 with a predetermined constant shutter time, and photographs at least the imaged barcode 6. Output the image signal.
A barcode decoder 11 is connected to the image sensor 3. The bar code decoder 11 receives the image signal output from the image sensor 3, extracts the bar code 6 included in the image signal, and decodes code information related to the product from the extracted bar code 6.

  The main control unit 8 has a function of the illumination control unit 12 by executing an illumination control program stored in the ROM, for example. The illumination control unit 12 receives a distance detection signal corresponding to the measurement distance D from the barcode 6 detected by the ultrasonic sensor 4 and illuminates the barcode 6 according to the measurement distance D from the barcode 6. An illumination intensity adjustment command for adjusting the illumination intensity is issued to the illumination drive circuit 9.

Specifically, the RAM of the main control unit 8 stores, for example, the relationship between the measurement distance D and the illumination intensity L shown in FIG. The measurement distance D corresponds to the distance between the ultrasonic sensor 4 and the barcode 6. The illumination intensity L corresponds to the amount of light emitted from the illumination unit 2. The measurement distance D and the illumination intensity L are
L = aD ² (1)
Have the relationship. a represents a proportional multiplier. According to the relationship between the measurement distance D and the illumination intensity L, the illumination intensity L increases in proportion to the square of the measurement distance D as the measurement distance D increases.
Incidentally, the image sensor 3 and the ultrasonic sensor 4 are provided at different locations as shown in FIG. Thereby, the measurement distance D between the ultrasonic sensor 4 and the barcode 6 and the distance H between the image sensor 3 and the barcode 6 are different. However, the illumination control unit 12 calculates the distance H between the image sensor 3 and the barcode 6, that is, the shooting distance H, and the following equation (2) from the measurement distance D between the ultrasonic sensor 4 and the barcode 6. Use to calculate.
H≈D + K (2)
Here, K is the distance between the image sensor 3 and the ultrasonic sensor 4.

  The shooting distance H calculated by the above equation (2) is the line La facing between the barcode 6 attached to the product 5 and the image sensor 3 and between the barcode 6 and the ultrasonic sensor 4. The angle θ formed by the opposing line Lb can be approximated within a preset allowable range. The angle θ within the allowable range that can be approximated is, for example, 10 ° or less.

  Accordingly, between the bar code 6 pasted on the product 5 somewhere in the imaging range of the image sensor 3 and the line La facing the image sensor 3, and between the bar code 6 and the ultrasonic sensor 4. The positional relationship between the image sensor 3 and the ultrasonic sensor 4 is determined so that the angle θ formed by the opposing line Lb is always 10 °. The image sensor 3 and the ultrasonic sensor 4 are respectively connected to the scanner apparatus body 1. Installed.

  However, the illumination control unit 12 calculates the above formula (2) using the measurement distance D between the barcode 6 detected by the ultrasonic sensor 4 and sets the photographing distance H as shown in FIG. An illumination intensity adjustment command that is obtained at every equal interval t and increases or decreases to the illumination intensity L proportional to the square of the imaging distance H, that is, the amount of light flux proportional to the square of the imaging distance H, is issued to the illumination drive circuit 9. 4 shows the relationship between the measurement distance D and the illumination intensity L, the measurement distance D in FIG. 4 corresponds to the shooting distance H as described above.

  The illumination intensity adjustment command issued from the illumination control unit 12 to the illumination drive circuit 9 is, for example, after a calculation time e is required from when the synchronization signal s described above becomes high level. Note that the calculation time e is a time required to obtain the illumination intensity L proportional to the square of the shooting distance H, and therefore requires only a very short time. Therefore, the detection operation of the shooting distance H by the ultrasonic sensor 4, the lighting operation of the illumination unit 2, and the shooting operation of the image sensor 3 are substantially synchronized.

Next, the operation of the apparatus configured as described above will be described.
For example, as shown in FIG. 3, the main control unit 8 outputs a synchronization signal s to the image sensor 3, the illumination drive circuit 9, and the ultrasonic sensor 4. As a result, the ultrasonic sensor 4 performs the detection operation of the measurement distance D between the barcode 6 and, for example, every preset equal interval t synchronized with the high level of the synchronization signal s. That is, the product 5 is gripped by, for example, an operator's hand, and the barcode 6 attached to the product 5 is arranged so that the position thereof is directly opposed to the front surface 1a of the scanner apparatus main body 1 by the movement of the operator's hand. Then, the ultrasonic sensor 4 detects the measurement distance D between the barcode 6 on the paper 7 affixed to the product 5 facing the front 1a side of the scanner apparatus body 1, and the distance detection signal Is output.

The illumination control unit 12 receives a distance detection signal corresponding to the distance from the barcode 6 detected by the ultrasonic sensor 4, obtains a measurement distance D from the barcode 6 from the distance detection signal, and determines the measurement distance D. Is used to calculate the above formula (2) to obtain the shooting distance H. And the illumination control part 12 calculates | requires the illumination intensity | strength L according to the imaging distance H from the relationship between the imaging distance H and the illumination intensity L which are memorize | stored in RAM, for example shown in FIG.
However, the illumination control unit 12 issues an illumination intensity adjustment command to the illumination drive circuit 9 to increase or decrease the luminous flux amount proportional to the square of the shooting distance H obtained by calculating the above equation (2). The illumination intensity adjustment command issued from the illumination control unit 12 to the illumination drive circuit 9 is after the time e has elapsed since the synchronization signal s became high level as described above. In response to the illumination intensity adjustment command issued from the illuminator, the voltage and current supplied to the illuminating unit 2 are controlled so that the luminous flux is proportional to the square of the imaging distance H between the image sensor 3 and the barcode 6. Turn on part 2. As a result, the illumination unit 2 is turned on by the voltage and current supplied from the illumination drive circuit 9, emits illumination light toward the front of the scanner device body 1, and illuminates the barcode 6 attached to the product 5. To do.
As a result, the barcode 6 affixed to the product 5 is illuminated with illumination light having a luminous flux proportional to the square of the imaging distance H between the image sensor 3 and the image sensor 3. Irrespective of the distance H, the illumination is always performed at a constant illuminance.

  When the barcode 6 affixed to the product 5 is illuminated by the illumination light emitted from the illumination unit 2, the image sensor 3 detects the barcode 6 affixed to the product 5 imaged by the lens 10. An image is incident, at least the imaged barcode 6 is photographed, and the image signal is output. The bar code decoder 11 receives the image signal output from the image sensor 3, extracts the bar code 6 included in the image signal, and decodes code information related to the product from the extracted bar code 6.

  As described above, according to the first embodiment, the measurement distance D between the ultrasonic sensor 4 and the barcode 6 on the paper 7 attached to the product 5 is detected, and based on the measurement distance D. Illumination light that is increased or decreased to a luminous flux proportional to the square of the imaging distance H between the barcode 6 and the image sensor 3 is emitted from the illumination unit 2 to illuminate the barcode 6 on the product 5. Accordingly, the barcode 6 attached to the product 5 is always illuminated with a constant illuminance regardless of the shooting distance H between the image sensor 3 and the barcode 6. The operator grips the product 5 with his / her hand and places it on the front 1a side of the scanner device main body 1. At this time, the arrangement position of the product 5 on the front 1a side of the scanner device main body 1 varies depending on each operator. The shooting distance H between the bar code 6 and the image sensor 3 varies depending on each operator.

  Even under such circumstances, the bar code 6 can always be illuminated with a constant illuminance. As a result, the image data of the barcode 6 acquired by photographing with the image sensor 3 does not become insufficient or excessive depending on the arrangement position of the product 5 on the front surface 1a side of the scanner device main body 1, and the barcode decoder 11 As a result, the code information relating to the product can be accurately and stably decoded from the bar code 6 and the usability can be improved.

Next, a second embodiment will be described with reference to the drawings. 1 and 2 are denoted by the same reference numerals, and detailed description thereof is omitted.
FIG. 6 shows a functional block diagram of the scanner device. The main control unit 8 has a function of the shooting control unit 13 by executing a shooting control program stored in a ROM, for example. The imaging control unit 13 receives a distance detection signal from the barcode 6 detected by the ultrasonic sensor 4 and controls the shutter time of the image sensor 3 in accordance with the measurement distance D from the barcode 6. Specifically, the RAM of the main control unit 8 stores the relationship between the measurement distance D shown in FIG. 7 and the shutter time F of the image sensor 3, for example. The measurement distance D corresponds to the distance from the image sensor 3 barcode 6 as described above. The measurement distance D and the shutter time F are
F = bD ² (3)
Have the relationship. b represents a proportional multiplier. According to the relationship between the measurement distance D and the shutter time F, as the measurement distance D increases, the shutter time F increases in proportion to the square of the measurement distance D.

  However, as with the illumination control unit 12, the imaging control unit 13 calculates the above equation (2) using the measurement distance D between the barcode 6 detected by the ultrasonic sensor 4 and the imaging distance H. 8 is obtained at every preset equal interval t shown in FIG. 8, and a shooting command for a shutter time F proportional to the square of the shooting distance H is issued to the image sensor 3. FIG. 7 shows the relationship between the measurement distance D and the shutter time F. As described above, the measurement distance D in FIG.

As shown in FIG. 8, the image sensor 3 enters the optical information of the image including the product 5 and the barcode 6 at predetermined equal intervals t and converts the information into electrical information such as charges. After the electrical information is reset R, the optical information of the image including the product 5 and the barcode 6 is incident again and converted into electrical information such as charges. After the reset R, the optical information of the image including the product 5 and the barcode 6 is incident again, for example, periods f ₁ , f ₂ , f ₃ ,... Become the respective shutter times F at predetermined equal intervals t. .

However, the imaging control unit 13 calculates the above equation (2) using the measurement distance D between the barcode 6 detected by the ultrasonic sensor 4 and sets the imaging distance H as shown in FIG. The length of each shutter time F (= f ₁ , f ₂ , f ₃ ,...) Obtained at every equal interval t and proportional to the square of the shooting distance H is adjusted.

The illumination drive circuit 9 continuously emits illumination light from the illumination unit 2. Note that the illumination unit 2 may emit illumination light discontinuously (intermittently), that is, turn on and off repeatedly. That is, the imaging control unit 13 sends information on each shutter time F (= f ₁ , f ₂ , f ₃ ,...) To the illumination drive circuit 9. The illumination drive circuit 9 lights the illumination unit 2 at each shutter time F (= f ₁ , f ₂ , f ₃ ,...).

Next, the operation of the apparatus configured as described above will be described.
For example, as shown in FIG. 8, the main control unit 8 outputs a synchronization signal s to the image sensor 3, the illumination drive circuit 9, and the ultrasonic sensor 4. As a result, the ultrasonic sensor 4 performs the detection operation of the measurement distance D between the barcode 6 and, for example, every preset equal interval t synchronized with the high level of the synchronization signal s. That is, the product 5 is gripped by, for example, an operator's hand, and the barcode 6 attached to the product 5 is arranged so that the position thereof is directly opposed to the front surface 1a of the scanner apparatus main body 1 by the movement of the operator's hand. Then, the ultrasonic sensor 4 detects the measurement distance D between the barcode 6 on the paper 7 affixed to the product 5 facing the front 1a side of the scanner apparatus body 1, and the distance detection signal Is output.

The imaging control unit 13 receives a distance detection signal from the barcode 6 detected by the ultrasonic sensor 4 and obtains a measurement distance D from the barcode 6 from the distance detection signal. Similar to the illumination control unit 12, the imaging control unit 13 calculates the formula (2) using the measurement distance D between the barcode 6 detected by the ultrasonic sensor 4 and calculates the imaging distance H. Ask. The photographing control unit 13 obtains the shutter time F of the image sensor 3 according to the photographing distance H from the relationship between the photographing distance H and the shutter time F shown in FIG.
However, the imaging control unit 13 calculates the above equation (2) using the measurement distance D between the barcode 6 detected by the ultrasonic sensor 4 and sets the predetermined equal intervals t shown in FIG. Then, the shooting distance H is obtained. Then, the shooting control unit 13 issues a shooting command for a shutter time F proportional to the square of each shooting distance H to the image sensor 3 at a predetermined equal interval t. That is, the imaging control unit 13 sets the length of each shutter time F (= f ₁ , f ₂ , f ₃ ,...) Proportional to the square of the imaging distance H at each preset equal interval t. A shooting command to be adjusted is issued to the image sensor 3.
As shown in FIG. 8, the image sensor 3 receives optical information of an image including the product 5 and the barcode 6 at each shutter time f ₁ , f ₂ , f ₃ ,. Converted into electrical information such as electric charge.

On the other hand, the illumination drive circuit 9 continuously emits illumination light from the illumination unit 2. Or the imaging control unit 13, the shutter time as shown in FIG. _{8 F (= f 1, f} 2, f 3, ...,) the information sent to the illumination drive circuit 9. The illumination drive circuit 9 lights the illumination unit 2 at each shutter time F (= f ₁ , f ₂ , f ₃ ,...). As a result, the illumination unit 2 emits illumination light toward the front of the scanner device main body 1 and illuminates the barcode 6 attached to the product 5.
As a result, the barcode 6 attached to the product 5 is imaged at a shutter time F (= f ₁ , f ₂ , f ₃ ,...) Proportional to the square of the shooting distance H between the image sensor 3 and the image sensor 3. Since the sensor 3 is operated for photographing, the brightness on the image data of the barcode 6 acquired by photographing with the image sensor 3 can be always kept constant regardless of the photographing distance H between the sensor 3 and the image sensor 3.

  However, the image sensor 3 enters the image of the barcode 6 pasted on the product 5 imaged by the lens 10, captures at least the imaged barcode 6 and outputs the image signal. . The bar code decoder 11 receives the image signal output from the image sensor 3, extracts the bar code 6 included in the image signal, and decodes code information related to the product from the extracted bar code 6.

As described above, according to the second embodiment, the ultrasonic sensor 4 detects the measurement distance D between the barcode 6 on the paper 7 attached to the product 5 and based on the measurement distance D. The image sensor 3 is caused to perform a photographing operation with a shutter time F (= f ₁ , f ₂ , f ₃ ,...) Proportional to the square of the photographing distance H between the barcode 6 and the image sensor 3. The operator grips the product 5 with his / her hand and places it on the front 1a side of the scanner apparatus main body 1. At this time, the arrangement position of the product 5 on the front 1a side of the scanner apparatus main body 1 varies depending on each operator. The shooting distance H between the bar code 6 and the image sensor 3 varies depending on each operator.

  Even under such circumstances, the image data of the barcode 6 acquired by photographing with the image sensor 3 is insufficiently bright or excessively bright depending on the arrangement position of the product 5 on the front surface 1a side of the scanner device body 1. In other words, the bar code decoder 11 can accurately and stably decode the code information related to the product from the bar code 6 and improve the usability.

Note that the present invention is not limited to the above-described embodiment as it is, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.
The relationship between the shooting distance H and the illumination intensity L is not limited to the above formula (1), and may be another relationship such as a proportional relationship. However, the illumination intensity L increases as the shooting distance H increases. Similarly, the relationship between the shooting distance H and the shutter time F is not limited to the above equation (3), and may be another relationship such as a proportional relationship. However, the shutter time F increases as the shooting distance H increases.

  Not only the image sensor 3 but also a camera using a CCD can be used.

1 is an external configuration diagram showing a first embodiment of a scanner device according to the present invention. FIG. The functional block diagram in the apparatus. The figure which shows the operation timing of the ultrasonic sensor in the same apparatus, an illumination part, and an image sensor. The figure which shows the relationship between the imaging distance used in the same apparatus, and illumination intensity. The figure for demonstrating calculation of the imaging distance in the same apparatus. The functional block diagram which shows 2nd Embodiment of a scanner apparatus . The figure which shows the relationship between the imaging distance used in the same apparatus, and shutter time. The figure which shows the operation | movement timing with the shutter time of the ultrasonic sensor in the same apparatus, an illumination part, and an image sensor.

Explanation of symbols

  1: scanner device main body, 1a: front of scanner device main body, 2: illumination unit, 3: image sensor, 4: ultrasonic sensor, 5: product, 6: bar code, 7: paper, 8: main control unit, 9 : Illumination drive circuit, 10: lens, 11: barcode decoder, 12: illumination control unit, 13: imaging control unit.

Claims (6)

In a scanner device that illuminates at least a barcode attached to a product with an illumination unit, captures at least the barcode with an imaging unit, and decodes the barcode from image information output from the imaging unit ,
A distance sensor for detecting a distance between the bar code;
Based on the distance between the barcode detected by the distance sensor and the distance between the distance sensor and the imaging unit, a distance between the imaging unit and the barcode is obtained, An illumination control unit that controls the illuminance at which the barcode is illuminated by the illumination unit according to a distance ;
A scanner device comprising: The scanner device according to claim 1 , wherein the distance sensor detects a distance from the barcode in synchronization with a photographing operation of the photographing unit. The scanner device according to claim 1, wherein the distance sensor is an ultrasonic sensor . The illumination control unit increases or decreases the amount of light emitted from the illumination unit in proportion to the square of the shooting distance calculated from the distance detected by the distance sensor, and makes the illuminance on the barcode constant. The scanner device according to claim 1 , wherein the scanner device is maintained . The distance sensor detects a distance from the barcode at a predetermined timing in synchronization with a photographing operation of the photographing unit,
The illumination control unit calculates each shooting distance at each predetermined timing from the distance detected by the distance sensor, and increases or decreases each light flux amount in proportion to the square of each shooting distance,
The scanner device according to claim 1 . The scanner device according to claim 1 , wherein a detection range of the distance by the distance sensor is set substantially equal to a shooting range by the shooting unit or within the shooting range by the shooting unit.

Images