JP3846897B2 - Mobile communication terminal - Google Patents

Description

The present invention relates to a mobile communication terminal such as a mobile phone or a portable information terminal, and particularly includes a camera,
The present invention relates to a mobile communication terminal having a function of transmitting image data captured by this camera by attaching it to an e-mail.

Recently, terminals having an image mail transmission function have been put into practical use in mobile communication terminals such as mobile phones and portable information terminals. The image mail transmission function is a function in which a camera is provided in a mobile communication terminal, and image data of a subject imaged by the camera is attached to a mail body and transmitted.
Conventionally, for example, this is realized as follows.

That is, in the standby state, the user first presses the camera button. Then, the imaging mode is activated, and the image data of the subject imaged by the camera is displayed on the display. When the registration button is pressed in a state where desired image data is displayed, the image data being displayed is stored in the built-in memory. Next, the user depresses a mail transmission button after performing an operation for ending the imaging mode. Then, the mail transmission mode is activated, and an operation menu for mail transmission is displayed on the display. In this state, when the user inputs information necessary for mail transmission such as a destination address, a subject, and a message, a transmission mail body is created.

Subsequently, when the image data being stored is specified as an attached file, the image data is encoded according to a predetermined encoding method before imaging and then attached to the mail text.

Then, after confirming the contents of the mail, when the transmission button is pressed, a wireless link is formed with the base station, and the mail is transmitted.

However, in a conventional mobile communication terminal equipped with such an image mail transmission function, when creating an e-mail with image data attached, exit the imaging mode and return to the main menu, and then activate the e-mail transmission mode. There is a need to. For this reason, the number of operations until image mail is transmitted is large, and the operability is poor.

In general, the image data encoding method is JPEG (Joint Photographic Experts Gross).
up) format or PNG (Portable Network Graphics) format is used. In a conventional terminal, the encoding method is designated before the imaging mode is started. For this reason, when sending an e-mail, the encoding method of the attached image data cannot be changed. To change it, it is necessary to start up the imaging mode again, specify the encoding method, and then take an image again. Yes, the operation was extremely troublesome.

The present invention has been made paying attention to the above circumstances, and its purpose is to perform processing from subject imaging to attachment of image data to the body of an email simply and quickly by simply operating an email button. Accordingly, it is an object of the present invention to provide a mobile communication terminal device that is improved in operability.

In order to achieve the above object, the present invention captures a key input unit having a plurality of keys, a camera for capturing a captured image, a shutter button for instructing photographing by the camera, and the camera. In a mobile communication terminal comprising a display that displays a captured image, an imaging control unit that captures a captured image of a subject via the camera by operating the shutter button and displays the captured image on the display; When activation of the mail function is requested by the operation of the key input unit following the operation of the shutter button and the encoding means for encoding the captured image captured from the camera , immediately before the activation request of the mail function The captured image captured and displayed on the display unit based on the shutter button operation performed is encoded by the encoding unit. Control means for size when it is checked whether fit a predetermined size, when it fits into the encoded sized captured image predetermined is confirmed by the control unit, creating a mail text A mail creating means for displaying on the display a mail screen for sending, and a transmission for sending a mail including the mail text and the encoded captured image when a mail transmission is requested by the operation of the key input unit. Means.

According to the present invention, when an operation for activating the mail transmission function is performed while the imaging function for imaging the subject is activated, the imaging function is terminated and the mail transmission function is activated. Then, in a state where the mail transmission function is activated, an input of information necessary for mail transmission is accepted and a mail body is created, and a captured image displayed on the display unit when moving to the mail transmission function is displayed. If you are accommodated in a predetermined size, and the encoded captured image so as to transmit and attach it to the mail text.

Therefore, according to the present invention, it is possible to provide a mobile communication terminal device that can easily and quickly perform processing from subject imaging to attachment of a captured image to a mail text, thereby improving operability. it can.

  Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a circuit block diagram showing a first embodiment of a mobile communication terminal having an image mail transmission function according to the present invention.

In the figure, a radio carrier signal transmitted from a base station (not shown) via a radio channel is received by an antenna 1 and then received by a receiving circuit (RX) 3 via an antenna duplexer (DUP) 2.
Is input. In the reception circuit 3, the received radio carrier signal is mixed with a reception local oscillation signal output from a frequency synthesizer (SYN) 4 and frequency-converted to a reception intermediate frequency signal. The received intermediate frequency signal is sampled by an A / D converter 6 including a low-pass filter and then input to a digital demodulation circuit (DEM) 7.

The digital demodulation circuit 7 performs digital demodulation processing after establishing frame synchronization and bit synchronization for the digital reception intermediate frequency signal. The baseband digital demodulated signal obtained by this demodulation processing is a time division multiple access circuit (TDMA) 8.
The time slot addressed to itself is separated and extracted for each transmission frame. The frame synchronization and bit synchronization information obtained in the digital demodulation circuit 7 is input to the control circuit 20.

The digital demodulated signal output from the TDMA circuit 8 is subsequently input to an error correction code decoding circuit (CH-COD) 9 where error correction decoding processing is performed. This error-correction-decoded digital demodulated signal includes information data such as mail and call voice data depending on the communication mode at that time. Among them, the voice data is input to a voice code decoding circuit (SP-COD) 10 and subjected to voice decoding processing, whereby a digital reception signal is reproduced. The digital reception signal is converted back to an analog reception signal by the D / A converter 11 and then supplied to the speaker 12 via a voice amplifier (not shown), and is output from the speaker 12 as a loud voice. Also,
Information data such as received mail and received download data is taken into the control circuit 20 and is stored in the memory (MEM) 24 by the control circuit 20 and is decoded and displayed (DI)
SP) 22.

On the other hand, the speaker's transmitted voice is collected by the microphone 13 and converted into a transmission signal, further amplified to a predetermined level by a transmission amplifier (not shown), and then input to the A / D converter 14. Then, the A / D converter 14 performs sampling at a predetermined sampling period, thereby converting it into a digital transmission signal composed of a sample pulse train. This digital transmission signal is canceled after an acoustic echo is canceled by an echo canceller (not shown).
It is input to a speech code decoding circuit (SP-COD) 9 where it is speech encoded.

This voice-coded digital transmission signal is converted into an error correction code decoding circuit (CH-COD) 9.
And is error-correction coded here. Information data such as a transmission mail output from the control circuit 20 is also input to the error correction code decoding circuit 9 and subjected to error correction encoding. The digital transmission signal output from the error correction code decoding circuit 9 is converted into a TDMA circuit 8.
Is input. In the TDMA circuit 8, a transmission frame corresponding to the time division multiple access (TDMA) system is generated, and processing for inserting the digital transmission signal into a time slot assigned to the own apparatus in the transmission frame is performed. The digital transmission signal output from the TDMA circuit 8 is subsequently input to a digital modulation circuit (MOD) 15.

The digital modulation circuit 15 generates a transmission intermediate frequency signal digitally modulated by the digital transmission signal. The transmission intermediate frequency signal is converted into an analog signal by the D / A converter 16 and then transmitted to the transmission circuit (TX) 5. Is input. As a digital modulation system, for example, π / 4 shift DQPSK (π / 4 shifted, differentially encoded quad
rature phase shift keying) method is used.

In the transmission circuit 5, the modulated transmission intermediate frequency signal is mixed with the transmission local oscillation signal output from the frequency synthesizer 4, and thereby converted into a radio carrier frequency corresponding to the radio communication channel. The transmission radio carrier signal is controlled to a predetermined transmission power level by a transmission power amplifier (not shown) and then transmitted from the antenna 1 to a base station (not shown) via the antenna duplexer 2.

The mobile communication terminal also includes a camera (CAM) 21, a display (DISP) 22, a key input unit (KEY) 23, and a memory (MEM) 24. The camera 21 is, for example, CM
OS (Complementary Metal Oxide Semiconductor) or CCD (Charge Coupled Device)
) And the like, and is controlled by the control circuit 20. The display 22
For example, a liquid crystal display (LCD) is used, and the control circuit 20
The display data output from is displayed. The key input unit 23 includes a transmission key, an end key, a plurality of function keys, and a dial key. The memory 24 includes, for example, a RAM or a flash memory, and stores mail and download data received from a telephone directory, a communication partner's terminal or an information site, and stores image data captured by the camera 21, transmission mail, and the like. To do. Reference numeral 18 denotes a power supply circuit, which generates a power supply voltage Vcc necessary for the operation of each circuit of the terminal based on the output voltage of the battery 17 composed of a secondary battery and supplies the generated power supply voltage to each circuit.

By the way, the control circuit 20 is provided with, for example, a microcomputer as a main control unit. In addition to normal control functions such as a wireless access control function and a call control function, a new function related to the present invention includes an imaging control function 20a and , A mode transition control function 20b, an encoding scheme control function 20c, and a mail transmission control function 20d.

The imaging control function 20a is activated when the camera button of the key input unit 23 is pressed in the standby state. The imaging control function 20a controls the camera 21 to capture the image data of the subject and causes the display 22 to display the image data. . At that time, if the shooting size is designated in advance, the size of the image data is set according to the shooting size, and if the frame is set, the image data is edited according to the frame. Then, the edited image data with frame is displayed on the display 22. If a timer value or shutter sound is set in advance, the shooting operation is controlled according to the setting contents.

The mode transition control function 20b monitors the transition operation to the mail transmission mode in the state where the imaging control function 20a is activated, that is, in the imaging mode. And the key input part 2
When the operation for shifting to the mail transmission mode is performed in step 3, the imaging control function 20a is terminated and the mail transmission control function 20d is activated.

The encoding method control function 20c, when a transition operation to the mail transmission mode is performed,
The key pressing time at this time is determined. If the key pressing time is shorter than a preset threshold value, the JPEG format is selected. On the other hand, if the key pressing time is longer than the threshold value, the PNG format is selected. Then, the image data is encoded according to the selected encoding method. When the PNG format is selected, the trimming frame of the image data is displayed on the display 22 so as to overlap the image data, and the user specifies the range of the image data to be left by the trimming process.

The mail transmission control function 20d creates a mail text according to the destination address, subject, and message content input by the user at the key input unit 23, and further, the imaging control function 20
The encoded data of the image data picked up by a is attached as an attached file to the mail body. Then, after the radio link is established, the created transmission mail is transmitted.

Next, an image mail transmission operation by the mobile communication terminal configured as described above will be described. FIG. 2 is a flowchart showing the procedure and content of the image mail transmission control.

In the standby state, the control circuit 20 monitors phone book search operations, call operations, mail transmission / reception operations, information site access operations, and the like, and also monitors camera button press operations in step 2a.

In this state, it is assumed that the user presses the camera button, for example, to send an image mail attached with his / her face image. Then, the control circuit 20 enters the imaging mode in step 2b, activates the camera 21 to start the imaging operation, and displays the captured moving image data on the display 22. D1 in FIG. 3 shows a state in which captured image data is displayed on the display 22. Then, when the user presses the shutter button, the control circuit 20 proceeds from step 2c to step 2d, and the captured image data at the time when the shutter button is pressed, that is, the still image is shown as a photograph in D2 of FIG. Is displayed on the display 22. That is, at this time, the display 22 becomes a paused screen.

When the user presses the registration button in this state, the control circuit 20 determines whether or not the album area provided in the memory 24 has a space, and if there is a space, encodes the still image and then the memory 24. Save in the album area. At this time, a message “Registered” is displayed on the display 22 together with the date and time, as indicated by D5 in FIG. Then, when 2 seconds have elapsed after the display of this message has started, the display returns to the state in which the moving image data captured by the camera 21 is displayed on the display 22 as indicated by D6 in FIG. On the other hand, if there is no free space in the album area in the memory 24, the screen returns to the pause screen shown in D2 without saving the still image.

Note that the user presses the clear button when re-taking a still image after pressing the shutter button. Then, a cancel message is displayed on the display 22 by the control circuit 20 as shown by D3 in FIG. In this state, when the user selects “YES” and then presses the enter button, the still image is cleared and returns to the display state of the captured image data shown in D1. When the user performs a clear operation in the state of D3, the screen returns to the pause screen shown in D2. Further, when the user performs a cursor operation in the state of D3 and selects “NO” and then presses the enter button or the clear button, the state returns to the state of D2.

Now, suppose that the user presses the mail button in order to send an e-mail with the paused still image attached in the state where the pause screen (D2 in FIG. 3) is displayed. Then, in step 2f, the control circuit 20 first determines whether the time of pressing the mail button is longer or shorter than a predetermined threshold value. If it is shorter than the threshold value, the process proceeds to step 2g.
Here, the JPEG method is selected as the image encoding method, and the still image during the pause is encoded by the JPEG method. In step 2j, it is determined whether or not the information size of the encoded still image is within a predetermined upper limit value, for example, 6 kbytes. If it is within 6 kbytes, the process proceeds to step 2k where Display the mail sending screen. A display example is shown in D7 of FIG.

In accordance with this mail transmission screen, the user operates the key input unit 23 to input a destination address, a subject, and a message body, and specify an attached file and a transmission option. Then, the control circuit 20 creates a transmission mail according to the input operation. At this time, if the attached file designation operation is not particularly performed, the encoded data of the still image during the pause is automatically attached as an attached file. When the user performs a transmission operation after the completion of the mail creation, the control circuit 20 executes control for forming a wireless link with a base station (not shown), and the above-mentioned creation is performed when the wireless link is formed. An email is sent.

On the other hand, it is assumed that the pressing time of the mail button is longer than a predetermined threshold value. In this case, the control circuit 20 selects the PNG method as the image encoding method. In general, the PNG method
Compared to the JPEG method, the information compression rate is low, and when a still image for one screen is encoded, the information size often exceeds the upper limit of the information size that can be attached to an email. Therefore, when the PNG method is selected as the encoding method, the control circuit 20 first performs still image trimming acceptance processing in step 2h.

For example, first, as shown at D8 in FIG. 4, the trimming frame T is displayed on the still image display screen. In this state, when the user operates the cursor key to move the trimming frame T to a desired position and then presses the enter button, the image in the range surrounded by the trimming frame T among the still images being paused. Is trimmed as indicated by D10 in FIG. Note that D9 in FIG. 4 shows an example of a state in which the position of the trimming frame T has been moved.

When the user presses the enter button after the trimming process, the control circuit 20 proceeds to step 2i and encodes the still image after the trimming process by the PNG method. In step 2j, the information size of the encoded still image is set to a predetermined upper limit value, for example, 6
It is determined whether or not it is within k bytes, and if it is within 6 k bytes, the process proceeds to step 2k where a mail transmission screen is displayed. A display example is shown in D11 of FIG.

As in the case of the JPEG method described above, the user operates the key input unit 23 according to the mail transmission screen to input a destination address, a subject, and a message body, and specifies an attached file and a transmission option. The control circuit 20 creates a transmission mail according to the input operation. At this time, if the user does not particularly perform an attachment file designation operation, the encoded data of the still image being paused is automatically attached as an attachment file. When the user performs a transmission operation after the completion of the mail creation, the control circuit 20 executes control for forming a wireless link with a base station (not shown), and the above-mentioned creation is performed when the wireless link is formed. An email is sent.

As described above, in the first embodiment, the mail transmission operation by the user is monitored and the mail transmission operation is performed during the imaging mode in which the still image captured by the camera 21 is displayed on the display 22. Activate the mail sending mode. When the mail input mode is activated and the user inputs information necessary for mail transmission to create a mail text, the encoded data of the still image displayed on the display 22 in the mail text. Is attached and sent.

Therefore, the user can perform the mail transmission operation as it is without performing the imaging mode end operation. In addition, since an operation of attaching the captured still image to the mail body is automatically performed, an operation for saving the captured still image data in the memory 24 and an attachment from a plurality of still image data stored in the memory 24 are performed. There is no need to select still image data to be attached and attach it to the mail text. For this reason, the operability can be greatly improved by reducing the number of user operations when creating and sending an image mail.

In the first embodiment, the encoding method of attached image data can be specified after the end of image capturing. For this reason, when changing the encoding method, it is possible to eliminate the troublesome operation of imaging again after starting the imaging mode again and specifying the encoding method again,
As a result, the encoding method of the attached image data can be selected with a simple operation.

In addition, the encoding method can be specified by the length of the operation time of the mail transmission operation. For this reason, it is not necessary to perform an operation for designating the encoding method of the attached image data separately from the mail transmission operation, thereby further improving the operability of the user.

Furthermore, in the first embodiment, when the PNG method is specified as the encoding method of the attached image data, the trimming frame T is displayed so as to overlap the still image to be attached, and the still image is displayed according to the trimming frame T. Trimming processing is performed to limit the region of the still image to be attached.

For this reason, when the PNG method with a low compression rate is selected, the trimming process of the attachment target image is automatically performed prior to the attachment of the image data. As a result, information on the attached file that can be attached to the mail Even when the size is limited to a relatively small value, it is possible to reliably transmit the attached image data.

In the first embodiment, the case where the user can specify the encoding method of the attached image data after image capturing has been described as an example. However, the encoding method can also be specified before starting image capturing or during image capturing. is there.

Hereinafter, image mail transmission control including a procedure for specifying an encoding method for attached image data before the start of imaging will be described as a second embodiment of the mobile communication terminal according to the present invention. FIG. 5 is a flowchart showing the control procedure and control contents.

That is, in the standby state, the control circuit 20 monitors the pressing operation of the camera button in step 5a. In this state, when the user presses the camera button to send an image mail, the control circuit 20 enters the imaging mode in step 5b, activates the camera 21 to start the imaging operation, and displays the captured moving image data. Display on the instrument 22.

During this imaging operation, the control circuit 20 monitors the operation of the shutter button in step 5c, and monitors the submenu selection operation in step 5g. Then, after the user selects a submenu in this state, when the image encoding method in the submenu is selected and designated, the control unit 20 proceeds to step 5h, where the selected and designated encoding method, for example, JPEG is selected. Set the method or PNG method. The default encoding method is set to the JPEG method.

When the user presses the shutter button after specifying the encoding method, the control circuit 20 proceeds from step 5c to step 5d, and displays captured image data at the time when the shutter button is pressed, that is, a still image, as a photograph. Displayed on the instrument 22. That is, at this time, the display 2
2 is the pause screen.

Subsequently, when the user presses the registration button, the control circuit 20 determines whether or not there is an empty album area provided in the memory 24. Save to the album area of. At this time, the message “Registered” is displayed on the display 22 together with the date and time. Then, when 2 seconds have elapsed after the start of the display of this message, the display returns to the state in which the moving image data captured by the camera 21 is displayed on the display 22. On the other hand, if there is no space in the album area in the memory 24, the screen returns to the paused screen without saving the still image.

On the other hand, it is assumed that the user presses the mail button in order to send an email with the still image attached during the pause while the pause screen is displayed. Then, the control circuit 20 proceeds from step 5f to step 5i, where the still image during the pause is first displayed in step 5f.
Encoding is performed according to the encoding method set in h. Then, it is determined whether or not the information size of the encoded still image is within a predetermined upper limit value, for example, 6 kbytes. If it is within 6 kbytes, the process proceeds to step 5j where the mail transmission screen is displayed. Is displayed.

In accordance with this mail transmission screen, the user operates the key input unit 23 to input a destination address, a subject, and a message body, and specify an attached file and a transmission option. Then, the control circuit 20 creates a transmission mail according to the input operation. At this time, if the attached file designation operation is not particularly performed, the encoded data of the still image during the pause is automatically attached as an attached file. When the user performs a transmission operation after the completion of the mail creation, the control circuit 20 executes control for forming a wireless link with a base station (not shown), and the above-mentioned creation is performed when the wireless link is formed. An email is sent.

As described above, in the second embodiment, similarly to the first embodiment, the mail transmission operation by the user is monitored during the imaging mode, and the mail transmission mode is activated when the mail transmission operation is performed. The encoded data of the still image being displayed is automatically attached to the mail body and transmitted. Therefore, the user can perform the mail transmission operation as it is without performing the operation for ending the imaging mode. Also, the user can store the captured still image data in the memory 24 and a plurality of still image data stored in the memory 24. An operation for selecting still image data to be attached from the above and attaching it to the mail body is not necessary. For this reason, the operability can be greatly improved by reducing the number of user operations when creating and sending an image mail.

Furthermore, since the encoding method of the attached image can be designated before the start of image capturing, the encoding method desired by the user can always be set reliably without causing forgetting the setting.

In the first embodiment, the encoding method of the attached image is determined based on the length of time when the mail transmission button is pressed. However, the determination is made based on the number of operations of the mail transmission button within a certain time. Alternatively, the determination may be made by a combination operation of a plurality of different buttons.

The encoding method of the attached image may be designated both before the start of imaging and after the end of imaging. Further, the user may arbitrarily specify whether or not to perform still image trimming processing. The shape of the trimming frame T is not limited to a rectangle, and a character such as a triangle, a star, a pentagon or more polygon, an animal, or the like. It may be set to the silhouette shape. Further, the case where the JPEG method and the PNG method are selectively used as the encoding method of the attached image has been described as an example, but other image encoding methods may be used.

Further, in each of the above embodiments, the mobile communication terminal adopting the TDMA scheme has been described as an example. However, the present invention can be similarly applied to a mobile communication terminal employing another radio communication scheme such as the CDMA scheme. In addition, the type and configuration of the mobile communication terminal, the image mail transmission control procedure, and the contents thereof can be variously modified and implemented without departing from the gist of the present invention.

1 is a circuit block diagram showing an embodiment of a mobile communication terminal having an image mail transmission function according to the present invention. The flowchart which shows the image mail transmission control procedure in the mobile communication terminal shown in FIG. 1, and its content. The figure which shows the transition of the display screen for demonstrating the imaging and registration operation | movement of the image in the mobile communication terminal shown in FIG. The figure which shows the transition of the display screen for demonstrating the image mail transmission operation | movement in the mobile communication terminal shown in FIG. The flowchart which shows the image mail transmission control procedure which shows other embodiment of the mobile communication terminal provided with the image mail transmission function concerning this invention, and its content.

Explanation of symbols

1 ... Antenna 2 ... Duplexer (DUP)
3. Receiving circuit (RX)
4 ... Frequency synthesizer (SYN)
5 ... Transmission circuit (TX)
6, 14 ... A / D converter 7 ... Digital demodulation circuit (DEM)
8 ... Time division multiple access circuit (TDMA)
9: Error correction code decoding circuit (CH-COD)
10: Speech code decoding circuit (SP-COD)
11, 16 ... D / A converter 12 ... Speaker 13 ... Microphone 15 ... Digital modulation circuit (MOD)
17 ... Battery 18 ... Power supply circuit (POW)
DESCRIPTION OF SYMBOLS 20 ... Control circuit 20a ... Imaging control function 20b ... Mode transition control function 20c ... Coding system control function 20d ... Mail transmission control function 21 ... Camera (CAM)
22 ... Display (DISP)
23 ... Key input section (KEY)
24 ... Memory (MEM)

Claims (3)

A movement provided with a key input unit having a plurality of keys, a camera for capturing a captured image, a shutter button for instructing photographing by the camera, and a display for displaying the captured image captured by the camera In the communication terminal,
An imaging control means for capturing a captured image of a subject via the camera by operating the shutter button and displaying the captured image on the display;
Encoding means for encoding a captured image captured from the camera;
When activation of the mail function is requested by operation of the key input unit following the operation of the shutter button, the mail function is fetched based on the operation of the shutter button performed immediately before the activation request of the mail function, and is displayed on the display device. Control means for confirming whether the displayed captured image is encoded within a predetermined size when encoded by the encoding means;
When it is confirmed by the control means that the encoded captured image fits in a predetermined size, a mail creation means for displaying a mail screen for creating a mail text on the display unit;
A mobile communication terminal comprising: a transmission unit configured to transmit a mail including the mail body and an encoded captured image when a mail transmission is requested by an operation of the key input unit. A movement provided with a key input unit having a plurality of keys, a camera for capturing a captured image, a shutter button for instructing photographing by the camera, and a display for displaying the captured image captured by the camera In the communication terminal,
An imaging control means for capturing a captured image of a subject via the camera by operating the shutter button and displaying the captured image on the display;
Encoding means for encoding a captured image captured from the camera;
When activation of the mail function is requested by operation of the key input unit following the operation of the shutter button, the mail function is fetched based on the operation of the shutter button performed immediately before the activation request of the mail function, and is displayed on the display device. Control means for confirming whether the displayed captured image is encoded within a predetermined size when encoded by the encoding means;
When it is confirmed by the control means that the encoded captured image fits in a predetermined size, a mail creation means for displaying a mail screen for inputting a destination address, a subject, and a message on the display When,
Mobile communication comprising: a transmission means for transmitting a mail including the destination address, subject, message, and encoded captured image when a mail transmission is requested by an operation of the key input unit. Terminal. A movement provided with a key input unit having a plurality of keys, a camera for capturing a captured image, a shutter button for instructing photographing by the camera, and a display for displaying the captured image captured by the camera In the communication terminal,
Capture control means for capturing a captured image of a subject via the camera by operating the shutter button and displaying the captured image on the display;
Encoding means for encoding a captured image captured from the camera;
When activation of the mail function is requested by operation of the key input unit following the operation of the shutter button, the mail function is fetched based on the operation of the shutter button performed immediately before the activation request of the mail function, and is displayed on the display device. Control means for causing the display to display a mail screen for creating a mail text when the displayed photographed image is encoded by the encoding means within a predetermined size. When,
A mobile communication terminal comprising: a transmission unit configured to transmit a mail including the mail body and an encoded captured image when a mail transmission is requested by an operation of the key input unit.

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