JP7540255B2 - Terminal device, program and control method - Google Patents

Description

The present invention relates to a terminal device , a program , and a control method .

Handheld terminals are known as portable terminal devices (information processing terminals) that input various information for managing products in stores and warehouses. Some handheld terminals for business use are equipped with both an NFC (Near Field Communication) antenna and a camera. In such handheld terminals, the NFC antenna and the camera are often positioned close to each other.

However, when the NFC antenna and the camera are placed close to each other, there is a risk that under certain conditions the radio waves output from the NFC antenna will interfere with the camera when capturing an image, resulting in noise being captured in the captured photo. In addition, a communication method for a high frequency (HF) band RFID system has been disclosed that prevents radio wave interference between multiple reader/writers and enables accurate communication between the reader/writer and the RFID (Radio Frequency IDentification) tag (see Patent Document 1).

JP 2017-22525 A

However, the communication method in Patent Document 1 merely prevents radio wave interference between the reader and writer, and cannot reduce noise that appears in captured images when a camera captures an image while radio waves are being output from the NFC antenna.

Therefore, the objective of the present invention is to reduce noise in captured images.

In order to solve the above problem, a terminal device of a first aspect of the present invention comprises a circuit unit that emits radio waves, a reception means for receiving an instruction input to store captured image data acquired via an imaging unit in a memory unit, a control means for controlling the circuit unit to interrupt the emission of the radio waves when the instruction input is received by the reception means, and an image acquisition means for acquiring the captured image data at either a first resolution at which interference noise does not appear in the captured image even when the radio waves are radiated, or a second resolution at which interference noise appears in the captured image when the radio waves are radiated, wherein the image acquisition means acquires the captured image data of the first resolution in real time as preview image data, while when the instruction input is received by the reception means, the control means acquires the captured image data of the second resolution after the emission of the radio waves is interrupted and stores it in the memory unit .
In addition, a second aspect of the terminal device according to the present invention is characterized in that it comprises a circuit unit that emits radio waves, a reception means for receiving an instruction input to store the captured image data acquired via the imaging unit in a memory unit, an image acquisition means for acquiring the captured image data at either a first resolution at which interference noise does not appear in the captured image even when the radio waves are radiated, or a second resolution at which interference noise appears in the captured image when the radio waves are radiated, a discrimination means for discriminating whether the resolution of the acquired captured image data is the second resolution when the reception means receives an instruction input, and a control means for controlling the circuit unit to interrupt radiation of the radio waves when the discrimination means discriminates that the resolution of the acquired captured image data is the second resolution.

Furthermore, a first aspect of the program according to the present invention causes a computer of a terminal device having a circuit unit that emits radio waves to function as a reception means for receiving an instruction input to store captured image data acquired via an imaging unit in a memory unit, a control means for controlling the circuit unit to interrupt the emission of the radio waves when the instruction input is received by the reception means , and an image acquisition means for acquiring the captured image data at either a first resolution at which interference noise does not appear in the captured image even when the radio waves are radiated, or a second resolution at which interference noise appears in the captured image when the radio waves are radiated, and the image acquisition means acquires the captured image data of the first resolution in real time as preview image data, while, when the instruction input is received by the reception means, acquires the captured image data of the second resolution after the emission of the radio waves is interrupted by the control means and stores it in the memory unit .
Furthermore, a second aspect of the program of the present invention is characterized in that it causes a computer of a terminal device having a circuit unit that radiates radio waves to function as: a reception means for receiving an instruction input to store captured image data acquired via an imaging unit in a memory unit; an image acquisition means for acquiring the captured image data at either a first resolution at which interference noise does not appear in the captured image even when the radio waves are radiated, or a second resolution at which interference noise appears in the captured image when the radio waves are radiated; a discrimination means for discriminating whether the resolution of the acquired captured image data is the second resolution when the reception means receives an instruction input; and a control means for controlling the circuit unit to interrupt the emission of the radio waves when the discrimination means discriminates that the resolution of the acquired captured image data is the second resolution.
Furthermore, a first aspect of the control method according to the present invention is a control method executed by a terminal device having a circuit unit that emits radio waves, and includes a reception process for receiving an instruction input to store captured image data acquired via an imaging unit in a memory unit, a control process for controlling the circuit unit to interrupt the emission of the radio waves when the instruction input is received by the reception process , and an image acquisition process for acquiring the captured image data at either a first resolution at which interference noise does not appear in the captured image even when the radio waves are radiated, or a second resolution at which interference noise appears in the captured image when the radio waves are radiated, wherein the image acquisition process acquires the captured image data of the first resolution in real time as preview image data, while when the instruction input is received by the reception process, acquires the captured image data of the second resolution after the emission of the radio waves is interrupted by the control process and stores it in the memory unit .
In addition, a second aspect of the control method of the present invention is a control method executed by a terminal device having a circuit unit that radiates radio waves, and is characterized in that it includes a reception process that receives an instruction input to store captured image data acquired via an imaging unit in a memory unit, an image acquisition process that acquires the captured image data at either a first resolution at which interference noise does not appear in the captured image even when the radio waves are radiated, or a second resolution at which interference noise appears in the captured image when the radio waves are radiated, a discrimination process that discriminates whether the resolution of the acquired captured image data is the second resolution when the instruction input is accepted by the reception process, and a control process that controls the circuit unit to interrupt radiation of the radio waves when it is determined by the discrimination process that the resolution of the acquired captured image data is the second resolution.

The present invention makes it possible to reduce noise in captured images.

1A is a front external view of a handheld terminal according to a first embodiment of the present invention, and FIG. FIG. 2 is a block diagram showing a functional configuration of the handheld terminal. 11 is a diagram showing the image saving resolution of the camera unit and the presence or absence of interference noise. FIG. 1A is a schematic diagram showing a captured image having interference noise, and FIG. 1B is a schematic diagram showing a captured image without interference noise; 1A is a diagram showing an example of a captured image having interference noise, FIG. 1B is a diagram showing an example of a captured image without interference noise, and FIG. 1C is an enlarged view of a portion of the captured image having interference noise in FIG. 11 is a flowchart showing a first imaging process. 11 is a timing chart showing the signal level of the shutter, the image data output from the camera unit, and the radio wave output from the NFC unit in the first imaging process. 11 is a flowchart showing a second imaging process.

The first and second embodiments of the present invention will be described in detail below with reference to the attached drawings. Note that the present invention is not limited to the illustrated examples.

(First embodiment)
A first embodiment of the present invention will be described with reference to Figures 1(a) to 7. First, the device configuration of this embodiment will be described with reference to Figures 1(a) to 2. Figure 1(a) is a front external view of a handheld terminal 10 of this embodiment. Figure 1(b) is a rear external view of the handheld terminal 10. Figure 2 is a block diagram showing the functional configuration of the handheld terminal 10.

The handheld terminal 10 shown in Fig. 1(a) and Fig. 1(b) as a terminal device (mobile terminal) is a portable information processing terminal that is used at the installation site, such as a supermarket, a mass retailer, or a warehouse that stores products, and is operated by a user, such as a store clerk or a manager, to input information. The handheld terminal 10 has a function for scanning symbols (barcodes, two-dimensional codes).

As shown in Fig. 1(a) and Fig. 1(b), the handheld terminal 10 has an operation unit 12 as a reception means, a display unit 14, an NFC unit 161 as a circuit unit, a scanner unit 17, a camera unit 18 as an imaging unit, and an LED (Light Emitting Diode) 191 on the housing 10a. The operation unit 12 has a touch panel 121 and a physical key unit 122. The touch panel 121 is a capacitive touch panel provided on the display panel of the display unit 14 on the front side of the housing 10a, and receives touch input from the user. Note that the touch panel 121 may be a touch panel of another type, such as a resistive film type.

The physical key section 122 has a physical trigger key 122a and a physical key group 122b. The physical trigger key 122a is provided on the front, left and right sides, and back of the housing 10a, and is a trigger key serving as a physical key (hard key) that accepts input from the user to execute a scan on the scanner section 17. The physical key group 122b is provided on the front side of the housing 10a and is a plurality of physical keys that accept various inputs from the user, and includes, for example, a numeric keypad that accepts input of numbers and letters, cursor keys that accept directional inputs of up, down, left and right, and various function keys that accept input of various functions.

The display unit 14 has an LCD (Liquid Crystal Display) display panel and displays various information on the display panel.

The NFC unit 161 is provided on the rear surface of the housing 10a, and is a communication unit that has an antenna for an NFC wireless communication method (NFC antenna (coil antenna)), a modulation/demodulation circuit, a signal processing circuit, etc., and performs NFC wireless communication with a communication destination by inputting and outputting an electromagnetic field. The frequency of the radio waves (electromagnetic field) of the NFC unit 161 is, for example, 13.56 [MHz], but is not limited to this. The NFC unit 161 may be configured as a wireless communication unit for a communication method of another frequency.

The NFC unit 161 performs NFC wireless communication with a communication destination such as a non-contact IC (Integrated Circuit) card such as an employee ID card, and reads information stored in the communication destination. The NFC unit 161 is located close to the camera unit 18, surrounding the camera unit 18 and the LED 191.

The scanner unit 17 is provided on the top surface of the housing 10a and has an aimer light emitting element and an imaging element such as a CMOS (Complementary Metal Oxide Semiconductor) imager, and is a scanner unit that captures an image of a symbol (barcode, two-dimensional code) that is a subject and reads the symbol. For example, the user orients the scanner unit 17 of the handheld terminal 10 so that the symbol is positioned within the aimer light, and the symbol is captured and scanned by the user pressing the physical trigger key 122a or touching the virtual trigger key as a soft key displayed on the display unit 14.

The camera unit 18 is provided on the rear surface of the housing 10a, and is a digital camera unit that has an optical system and an image sensor and captures an image of a subject to generate image data. During a preview in which real-time preview (live) image data is displayed on the display unit 14, the image data generated by the camera unit 18 is acquired as preview image data, and when the user presses the shutter during the preview, image data of a still image for storage is generated by the camera unit 18 as the captured image data. The subject of the camera unit 18 is, for example, a cardboard box that contains a product, and a user or the like visually checks the image of the captured image data generated by the image capture (captured image) to check for crushing, scratches, etc. on the cardboard box of the product.

The LED 191 is a light-emitting element that is provided on the rear surface of the housing 10a in close proximity to the camera unit 18 and irradiates light onto the subject of the camera unit 18.

Next, the internal functional configuration of the handheld terminal 10 will be described with reference to FIG. 2. The handheld terminal 10 includes a CPU (Central Processing Unit) 11 as a discrimination means, control means, and image acquisition means, an operation unit 12, a RAM (Random Access Memory) 13, a display unit 14, a storage unit 15, a wireless communication unit 16, a scanner unit 17, a camera unit 18, an output unit 19, and a battery 20. Each unit of the handheld terminal 10 is connected via a bus 21.

The CPU 11 controls each part of the handheld terminal 10. The CPU 11 reads out a specified program from among the system programs and application programs stored in the memory unit 15, expands it in the RAM 13, and executes various processes in cooperation with the expanded program.

The operation unit 12 has a touch panel 121 and a physical key unit 122, and accepts touch input from the user to the touch panel 121 and key input to the physical key unit 122, and outputs the operation information to the CPU 11.

RAM 13 is a volatile memory that forms a work area for temporarily storing various data and programs.

The display unit 14 performs various displays on the LCD display panel according to the display information instructed by the CPU 11. The display unit 14 may be an EL (Electro-Luminescence) display or other display unit.

The storage unit 15 is a non-volatile storage unit such as a flash memory from which information can be read and written. Various data and programs are stored in the storage unit 15. In particular, the storage unit 15 stores a first imaging program P1 as an application program for executing a first imaging process described below.

The wireless communication unit 16 has antennas for various wireless communication methods, a modulation/demodulation circuit, a signal processing circuit, etc., and is at least one wireless communication unit that performs wireless communication with a communication destination, and has an NFC unit 161. The wireless communication methods of each wireless communication unit other than the NFC unit 161 of the wireless communication unit 16 include a wireless LAN (Local Area Network) such as Wi-Fi (registered trademark), a wireless WAN (Wide Area Network), etc. For example, the CPU 11 transmits and receives information to and from a communication destination such as a contactless IC card by NFC communication via the NFC unit 161 of the wireless communication unit 16.

Scanner unit 17, under the control of CPU 11, captures an image of a symbol as a subject, generates image data, and outputs the image data to CPU 11. CPU 11 decodes the image data of the symbol captured by scanner unit 17 to obtain data contained in the symbol. Scanner unit 17 may be a laser scanner that scans a barcode as a symbol with laser light, and decodes a signal obtained by inputting the reflected light to obtain data contained in the barcode.

The camera unit 18 captures an image of a subject and generates captured image data under the control of the CPU 11.

The output unit 19 has an LED 191 and a sound output unit such as an amplifier and a speaker, and according to the control of the CPU 11, turns on/off the LED 191 and outputs sound from the sound output unit.

The battery 20 is a rechargeable battery (secondary battery) such as a lithium ion battery, and supplies power to each part of the handheld terminal 10. The battery 20 also turns off the supply of power to each part of the handheld terminal 10 (power off) under the control of the CPU 11.

Next, the operation of the handheld terminal 10 will be described with reference to Figs. 3 to 7. Fig. 3 is a diagram showing the image saving resolution of the camera unit 18 and the presence or absence of interference noise. Fig. 4(a) is a schematic diagram showing a captured image with interference noise. Fig. 4(b) is a schematic diagram showing a captured image without interference noise. Fig. 5(a) is a diagram showing a captured image with interference noise. Fig. 5(b) is a diagram showing a captured image without interference noise. Fig. 5(c) is an enlarged view of a portion vc of the captured image with interference noise in Fig. 5(a). Fig. 6 is a flowchart showing the first imaging process. Fig. 7 is a timing chart showing the shutter signal level, image data output from the camera unit 18, and radio wave output from the NFC unit 161 in the first imaging process.

First, the interference between the NFC unit 161 and the camera unit 18 will be described with reference to Figs. 3 to 5(b). When capturing an image of a subject using the camera unit 18, in response to a selection input by the user via the operation unit 12, when image data captured by the camera unit 18 (captured image data) is saved as captured image data, it is possible to select and set the imaging resolution of the camera unit 18 to one of a number of image saving resolutions in the table of Fig. 3. For example, as shown in Fig. 3, it is possible to select one image saving resolution from 13.0 M [pixel], 8.3 M [pixel], 5.8 M [pixel], 5.0 M [pixel], 3.1 M [pixel], and 0.9 M [pixel].

The output frequency of the radio waves from the NFC unit 161 is a fixed frequency of 13.56 [MHz], and therefore may interfere with the image storage resolution of the camera unit 18, and may appear as interference noise in the image of the captured image data (captured image). For example, as shown in FIG. 3, the output frequency of the radio waves from the NFC unit 161 may interfere with the image storage resolution of 13.0 M [pixels], causing interference noise ("X" in FIG. 3), but it may not interfere with other image storage resolutions and no interference noise may occur ("O" in FIG. 3).

In the captured image of the captured image data generated by the camera unit 18 capturing an image of a subject at an image storage resolution (13.0 M [pixel]) at which interference occurs with the output frequency of the radio waves from the NFC unit 161, there is a risk that multiple interference fringes consisting of dark and light colored areas extending vertically due to the occurrence of interference noise, as shown in the schematic diagram of the captured image shown in FIG. 4(a). Specifically, as shown in FIG. 5(a), an example of an actual captured image corresponding to the captured image of FIG. 4(a) contains interference fringes. More specifically, as shown in FIG. 5(c), in an enlarged view of a portion vc of the actual captured image of FIG. 5(a), interference fringes are captured in which dark and light colored areas extending vertically are alternately arranged horizontally, and the image quality is poor due to the interference fringes.

In contrast, when capturing an image of the same subject as the captured image in FIG. 4(a), as shown in FIG. 4(b), in a schematic diagram of the captured image of captured image data generated by capturing an image of the subject by the camera unit 18 at a resolution (other than 13.0 M [pixel]) that does not cause interference with the output frequency of the radio waves from the NFC unit 161, no interference noise occurs and no interference fringes are visible. Specifically, as shown in FIG. 5(b), in an example of an actual captured image corresponding to the captured image in FIG. 4(b), no interference fringes are visible and the image quality is better than that of the captured image in FIG. 5(a).

Next, the first imaging process executed by the handheld terminal 10 will be described with reference to FIG. 6. In the handheld terminal 10, for example, when a user inputs an instruction to execute the first imaging process via the operation unit 12, the CPU 11 executes the first imaging process in cooperation with the first imaging program P1 that is read from the storage unit 15 and appropriately deployed in the RAM 13.

It is assumed that a preview resolution for previewing captured image data (captured image data) on the display unit 14 and an image storage resolution for storing the captured image data in the storage unit 15 are set in advance for the camera unit 18 by operation input from the user via the operation unit 12. The preview resolution and image storage resolution are set, for example, by selecting from each image storage resolution in the table of FIG. 3. It is preferable that the preview resolution is set to a resolution (0.9 M [pixel] to 8.3 M [pixel]) that does not generate interference noise with the radio waves of the NFC unit 161, because interference noise is not reflected in each frame of the preview image. For example, it is assumed that the above-mentioned resolution that does not generate interference noise is set as the default preview resolution, and can be set to another resolution that does not generate interference noise by a selection operation by the user.

It is also assumed that communication including emission of radio waves is set on/off in advance in the NFC section 161 in response to an operational input by the user via the operation section 12. When the NFC section 161 is on, NFC radio waves are emitted from the NFC section 161 and NFC communication with a communication destination such as a contactless IC card is possible, but there is a possibility of interference noise occurring as shown in the table in FIG. 3. When the NFC section 161 is off, NFC radio waves are not emitted from the NFC section 161 and NFC communication is not possible, but there is no possibility of interference noise occurring as shown in the table in FIG. 3.

As shown in FIG. 6, first, the CPU 11 activates the camera unit 18 (step S11). Then, the CPU 11 sets the imaging resolution of the camera unit 18 to a preset preview resolution (step S12). The preview resolution is, for example, a resolution at which no interference noise occurs (0.9M [pixel] to 8.3M [pixel]). Then, the CPU 11 obtains the captured image data at the preview resolution from the camera unit 18 and displays the preview image on the display unit 14 (step S13).

Then, the CPU 11 determines whether or not the user has performed a shutter operation via the operation unit 12 (step S14). If there has been no shutter operation (step S14; NO), the process proceeds to step S14. If there has been a shutter operation (step S14; YES), the CPU 11 switches and sets the imaging resolution of the camera unit 18 to a preset image saving resolution (step S15). The image saving resolution is, for example, a resolution at which interference noise occurs (13.0 M [pixel]).

Then, the CPU 11 determines whether the NFC section 161 is on and whether there is an output (radiation) of NFC radio waves from the NFC section 161 (step S16). If there is an output of NFC radio waves (step S16; YES), the CPU 11 turns off the NFC section 161 (step S17). The CPU 11 then causes the camera section 18 to generate and acquire image data of an image of the subject at a resolution for image storage, and stores the image data in the memory section 15 (step S18). In step S18, the CPU 11 acquires and stores the image data at a timing when the resolution switching has stabilized after adjusting the exposure and white balance for image capture by the camera section 18.

Note that step S15 may be inserted between steps S17 and S18. In other words, the order of switching the resolution and then turning off the NFC unit 161 does not necessarily have to be followed.

Then, the CPU 11 turns on the NFC unit 161 (step S19). Then, the CPU 11 switches and sets the imaging resolution of the camera unit 18 to a preset preview resolution (step S20), and proceeds to step S13.

If there is no NFC radio wave output (step S16; NO), the CPU 11 causes the camera unit 18 to generate and acquire image data of the subject at a resolution for image storage, and stores the image data in the memory unit 15 (step S21), and then proceeds to step S20.

For example, as shown in FIG. 7, the first imaging process is executed in the handheld terminal 10 in which the NFC section 161 is (always) turned on and NFC radio waves are being output. In step S13, image data with a preview resolution (preview image data with a preview size) is generated and acquired by the camera section 18, and a preview display is started. When a shutter operation is performed in step S14, the imaging resolution is switched to the image saving resolution in step S15, and the NFC section 161 is turned off in step S17.

Then, in step S18, the exposure and white balance of the camera unit 18 are adjusted, and then image data at the image saving resolution (image data at the image saving size) is generated and acquired by the camera unit 18 and stored in the memory unit 15. Then, in step S19, the NFC unit 161 is turned on, in step S20 the imaging resolution is switched to the preview resolution, and again in step S13, image data at the preview size is generated and acquired by the camera unit 18 and the preview display is started.

As described above, according to this embodiment, the handheld terminal 10 as a terminal device includes an NFC section 161 that emits radio waves, an operation section 12 that accepts an instruction input (shutter operation input) to store captured image data (image data) acquired via the camera section 18 in the storage section 15, and a CPU 11 that controls the NFC section 161 to stop emitting radio waves (turns off the NFC section 161) when the operation section 12 accepts a shutter operation input.

Therefore, even if the image saving resolution of the camera unit 18 after the shutter operation input is a resolution (second resolution) that interferes with the radio waves of the NFC unit 161, the NFC unit 161 is turned off and does not emit radio waves, so that interference noise in the captured image data obtained and stored from the camera unit 18 can be reduced.

When the CPU 11 receives an instruction input from the operation unit 12, it determines whether or not radio waves are being emitted from the NFC unit 161, and if it determines that radio waves are being emitted from the NFC unit 161, it controls the NFC unit 161 to stop emitting radio waves. Therefore, even if the image saving resolution of the camera unit 18 after the shutter operation input is a resolution (second resolution) that interferes with the radio waves of the NFC unit 161, the NFC unit 161 that is emitting radio waves is turned off and no longer emits radio waves, so that interference noise in the captured image data acquired from the camera unit 18 and stored can be reduced.

The CPU 11 also acquires image data from the camera unit 18 at either a first resolution (0.9 M [pixel] to 8.3 M [pixel]) at which interference noise does not appear in the captured image even when radio waves are radiated, or a second resolution (13.0 M [pixel]) at which interference noise appears in the captured image when radio waves are radiated. The CPU 11 also acquires image data at the first resolution in real time as preview image data, and when a shutter command input is received, acquires image data at the second resolution as captured image data after the radio wave radiation is interrupted and stores it in the storage unit 15. This makes it possible to reduce interference noise in the preview image of the preview image data, and also to reduce interference noise in the captured image of the captured image data.

In addition, after storing the image data of the second resolution in the storage unit 15, the CPU 11 controls the NFC unit 161 to a state in which radio wave emission is possible (NFC unit 161 ON). This makes it possible to reduce interference noise in the captured image of the captured image data, and to quickly transition to a state in which NFC communication using the NFC unit 161 is possible, thereby minimizing the time during which the NFC unit 161 (NFC communication) cannot be used.

Second Embodiment
A second embodiment of the present invention will be described with reference to Fig. 8. First, the device configuration of this embodiment is the same as that of the first embodiment, and uses the handy terminal 10. However, it is assumed that a second imaging program P2 (not shown) is stored in the storage unit 15 instead of the first imaging program P1, and that the table data (table data) shown in Fig. 3 is stored in the storage unit 15.

Next, the operation of the handheld terminal 10 will be described with reference to FIG. 8. FIG. 8 is a flowchart showing the second imaging process.

The second imaging process executed by the handheld terminal 10 will be described with reference to FIG. 8. In the handheld terminal 10, for example, when a user inputs an instruction to execute the second imaging process via the operation unit 12, the CPU 11 executes the second imaging process in cooperation with the second imaging program P2 that is read from the storage unit 15 and appropriately deployed in the RAM 13. Here, it is assumed that the NFC unit 161 is set to be always on in advance.

As shown in FIG. 8, steps S31 to S35 are the same as steps S11 to S15 of the first imaging process in FIG. 6. The CPU 11 then refers to the table data in FIG. 3 stored in the memory unit 15 and determines whether the imaging resolution has been switched to an image saving resolution that interferes with radio waves from the NFC unit 161 in step S35 (step S36).

If the resolution has been switched to the interfering image storage resolution (step S36; YES), the process proceeds to step S37. If the resolution has not been switched to the interfering image storage resolution (step S36; NO), the process proceeds to step S41. Steps S37 to S41 are the same as steps S17 to S21 of the first imaging process in FIG. 6.

As described above, according to this embodiment, the handheld terminal 10 includes an NFC section 161 that emits radio waves, an operation section 12 that accepts instruction input to store captured image data (image data) acquired via the camera section 18 in the storage section 15, and a CPU 11 that acquires image data at either a first resolution at which interference noise does not appear in the captured image even when radio waves are radiated, or a second resolution at which interference noise appears in the captured image when radio waves are radiated, and that, upon receiving instruction input, determines whether the resolution of the acquired image data is the second resolution, and, if it is determined that the resolution of the acquired image data is the second resolution, controls the NFC section 161 to stop emitting radio waves.

As a result, when the image saving resolution of the camera unit 18 after the shutter operation input is the second resolution that interferes with the radio waves of the NFC unit 161, the NFC unit 161 is turned off and does not emit radio waves, so that interference noise in the captured image of the captured image data acquired and stored from the camera unit 18 can be reduced.

The CPU 11 also acquires captured image data of the first resolution in real time as preview image data, and when an instruction input is received from the operation unit 12, if it is determined that the resolution of the image data to be acquired is the second resolution, the CPU 11 acquires captured image data of the second resolution after the emission of radio waves from the NFC unit 161 is interrupted and stores the data in the storage unit 15. This makes it possible to reduce interference noise in the preview image of the preview image data, and also to reduce interference noise in the captured image of the captured image data.

In the above explanation, an example has been disclosed in which a non-volatile storage unit such as a flash memory is used as a computer-readable medium for the program according to the present invention, but the present invention is not limited to this example. As other computer-readable media, portable recording media such as a CD-ROM can be applied. Furthermore, carrier waves can also be applied to the present invention as a medium for providing data for the program according to the present invention via a communication line.

The description in the above embodiment is an example of the terminal device and program according to the present invention, and is not limited to this.

For example, the first embodiment and the second embodiment may be appropriately combined. Specifically, for example, in the first imaging process of FIG. 6, if step S16; YES, it is determined whether the imaging resolution has been switched to an image storage resolution that interferes with the radio waves of the NFC section 161 in step S15, corresponding to step S36 of FIG. 8. If it has been switched to an interfering image storage resolution, steps S17 to S20 are executed, and if it has not been switched to an interfering image storage resolution, steps S21 and S20 are executed.

In addition, in each of the above embodiments, the preview resolution during preview and the image saving resolution during image capture are set separately and used to generate image data, but this is not limited to the above. For example, the same image saving resolution may be set both during preview and image capture and used to generate image data.

In addition, in each of the above embodiments, image data of a still image at an image saving resolution (captured image data) is obtained from the camera unit 18 during the period when the NFC unit 161 is off, and interference noise is prevented from appearing in the captured still image of the captured image data, but this is not limited to the above. For example, image data at a preview resolution or moving image data for capturing may be obtained from the camera unit 18 during the period when the NFC unit 161 is off, and interference noise may be prevented from appearing in the preview image of the preview image data or each frame of the moving image data for capturing.

In addition, in each of the above embodiments, the NFC unit 161 is used as a circuit unit that may interfere with the camera unit 18, but this is not limited to the above. For example, a communication unit that uses a communication method other than NFC may be used as a circuit unit that emits radio waves that may interfere with the camera unit 18.

Furthermore, the detailed configuration and detailed operation of each component of the handheld terminal 10 in the above embodiment may of course be modified as appropriate without departing from the spirit of the present invention.

Although the embodiments of the present invention have been described, the scope of the present invention is not limited to the above-described embodiments, but includes the scope of the invention described in the claims and its equivalents.
The invention as described in the claims originally attached to this application is set forth below. The claim numbers in the appended claims are the same as those in the claims originally attached to this application.
[Additional Notes]
<Claim 1>
A circuit section that emits radio waves;
a receiving unit for receiving an instruction input for storing captured image data acquired via the imaging unit in a storage unit;
a control means for controlling the circuit unit to stop emitting the radio wave when the instruction input is received by the receiving means;
A terminal device comprising:
<Claim 2>
a determination unit that determines whether or not radio waves are being emitted from the circuit unit when an instruction input is received by the reception unit,
the control means controls the circuit unit to stop emitting the radio waves when the determination means determines that the circuit unit is emitting radio waves.
2. The terminal device according to claim 1 .
<Claim 3>
an image acquisition means for acquiring the captured image data at either a first resolution at which interference noise does not appear in the captured image even when the radio wave is radiated, or a second resolution at which interference noise appears in the captured image when the radio wave is radiated,
the image acquisition means acquires the captured image data of the first resolution in real time as preview image data, and when the instruction input is accepted by the acceptance means, acquires the captured image data of the second resolution after the control means stops emitting the radio waves, and stores the image data in the storage unit.
3. The terminal device according to claim 1 or 2.
<Claim 4>
A circuit section that emits radio waves;
a receiving unit for receiving an instruction input for storing captured image data acquired via the imaging unit in a storage unit;
an image acquisition means for acquiring the captured image data at either a first resolution at which interference noise does not appear in the captured image even when the radio wave is radiated, or a second resolution at which interference noise appears in the captured image when the radio wave is radiated;
a determination means for determining whether or not a resolution of the captured image data to be acquired is the second resolution when an instruction input is received by the reception means;
a control means for controlling the circuit unit to stop emitting the radio wave when the determination means determines that the resolution of the captured image data to be acquired is the second resolution;
A terminal device comprising:
<Claim 5>
the image acquisition means acquires the captured image data of the first resolution in real time as preview image data, and, when the acceptance means accepts the instruction input, if the discrimination means discriminates that the resolution of the captured image data to be acquired is the second resolution, the image acquisition means acquires the captured image data of the second resolution after the control means interrupts the emission of the radio waves and stores the image data in the storage unit.
5. The terminal device according to claim 4.
<Claim 6>
the control means controls the circuit unit to a state in which the radio wave can be emitted after the captured image data having the second resolution is stored in the storage unit.
6. The terminal device according to claim 3 or 5.
<Claim 7>
A computer of a terminal device having a circuit unit that emits radio waves,
A receiving means for receiving an instruction input for storing captured image data acquired via the imaging unit in a storage unit;
a control means for controlling the circuit unit to stop emitting the radio waves when the instruction input is received by the receiving means;
A program to function as a
<Claim 8>
A computer of a terminal device having a circuit unit that emits radio waves,
A receiving means for receiving an instruction input for storing captured image data acquired via the imaging unit in a storage unit;
an image acquisition means for acquiring the captured image data at either a first resolution at which interference noise does not appear in the captured image even when the radio wave is radiated, or a second resolution at which interference noise appears in the captured image when the radio wave is radiated;
a determination means for determining whether or not a resolution of the captured image data to be acquired is the second resolution when an instruction input is received by the reception means;
a control means for controlling the circuit unit to stop emitting the radio wave when the determination means determines that the resolution of the captured image data to be acquired is the second resolution;
A program to function as a

10 Handheld terminal 10a Housing 11 CPU
12 Operation unit 121 Touch panel 122 Physical key unit 122a Physical trigger key 122b Physical key group 13 RAM
14 Display unit 15 Memory unit 16 Wireless communication unit 161 NFC unit 17 Scanner unit 18 Camera unit 19 Output unit 191 LED
20 Battery 21 Bus

Claims (9)

A circuit section that emits radio waves;
a receiving unit for receiving an instruction input for storing captured image data acquired via the imaging unit in a storage unit;
a control means for controlling the circuit unit to stop emitting the radio wave when the instruction input is received by the receiving means;
an image acquisition means for acquiring the captured image data at either a first resolution at which interference noise does not appear in the captured image even when the radio wave is radiated, or a second resolution at which interference noise appears in the captured image when the radio wave is radiated,
the image acquisition means acquires the captured image data of the first resolution in real time as preview image data, and when the instruction input is accepted by the acceptance means, acquires the captured image data of the second resolution after the control means stops emitting the radio waves, and stores the image data in the storage unit.
A terminal device comprising: a determination unit that determines whether or not radio waves are being emitted from the circuit unit when an instruction input is received by the reception unit,
the control means controls the circuit unit to stop emitting the radio waves when the determination means determines that the circuit unit is emitting radio waves.
2. The terminal device according to claim 1 . A circuit section that emits radio waves;
a receiving unit for receiving an instruction input for storing captured image data acquired via the imaging unit in a storage unit;
an image acquisition means for acquiring the captured image data at either a first resolution at which interference noise does not appear in the captured image even when the radio wave is radiated, or a second resolution at which interference noise appears in the captured image when the radio wave is radiated;
a determination means for determining whether or not a resolution of the captured image data to be acquired is the second resolution when an instruction input is received by the reception means;
a control means for controlling the circuit unit to stop emitting the radio wave when the determination means determines that the resolution of the captured image data to be acquired is the second resolution;
A terminal device comprising: the image acquisition means acquires the captured image data of the first resolution in real time as preview image data, and, when the acceptance means accepts the instruction input, if the discrimination means discriminates that the resolution of the captured image data to be acquired is the second resolution, the image acquisition means acquires the captured image data of the second resolution after the control means interrupts the emission of the radio waves and stores the image data in the storage unit.
4. The terminal device according to claim 3 . the control means controls the circuit unit to a state in which the radio wave can be emitted after the captured image data having the second resolution is stored in the storage unit.
5. The terminal device according to claim 1, wherein the first and second terminals are connected to each other. A computer of a terminal device having a circuit unit that emits radio waves,
A receiving means for receiving an instruction input for storing captured image data acquired via the imaging unit in a storage unit;
a control means for controlling the circuit unit to stop emitting the radio waves when the instruction input is received by the receiving means;
functioning as an image acquisition means for acquiring the captured image data at either a first resolution at which interference noise is not captured in the captured image even when the radio wave is radiated, or a second resolution at which interference noise is captured in the captured image when the radio wave is radiated;
The image acquisition means acquires the captured image data of the first resolution in real time as preview image data, while when the instruction input is accepted by the acceptance means, the image acquisition means acquires the captured image data of the second resolution after the control means interrupts the emission of the radio waves and stores it in the memory unit. A computer of a terminal device having a circuit unit that emits radio waves,
A receiving means for receiving an instruction input for storing captured image data acquired via the imaging unit in a storage unit;
an image acquisition means for acquiring the captured image data at either a first resolution at which interference noise does not appear in the captured image even when the radio wave is radiated, or a second resolution at which interference noise appears in the captured image when the radio wave is radiated;
a determination means for determining whether or not a resolution of the captured image data to be acquired is the second resolution when an instruction input is received by the reception means;
a control means for controlling the circuit unit to stop emitting the radio wave when the determination means determines that the resolution of the captured image data to be acquired is the second resolution;
A program to function as a A control method executed by a terminal device having a circuit unit that emits radio waves, comprising:
A reception process of receiving an instruction input for storing captured image data acquired via the imaging unit in a storage unit;
a control process for controlling the circuit unit to stop emitting the radio waves when the instruction input is received by the reception process;
an image acquisition process for acquiring the captured image data at either a first resolution at which interference noise does not appear in the captured image even when the radio wave is radiated, or a second resolution at which interference noise appears in the captured image when the radio wave is radiated;
The control method is characterized in that the image acquisition process acquires the first resolution image data in real time as preview image data, while when the instruction input is accepted by the reception process, the control process acquires the second resolution image data after the emission of the radio waves is interrupted and stores it in the memory unit . A control method executed by a terminal device having a circuit unit that emits radio waves, comprising:
A reception process of receiving an instruction input for storing captured image data acquired via the imaging unit in a storage unit;
an image acquisition process for acquiring the captured image data at either a first resolution at which interference noise does not appear in the captured image even when the radio wave is radiated, or a second resolution at which interference noise appears in the captured image when the radio wave is radiated;
a determination process of determining whether or not a resolution of the captured image data to be acquired is the second resolution when an instruction input is accepted by the acceptance process;
a control process for controlling the circuit unit to stop emitting the radio wave when the resolution of the captured image data to be acquired is determined to be the second resolution by the determination process;
A control method comprising:

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