KR101578556B1 - Method For Taking Picture Of Portable Terminal And Portable Terminal Performing The Same - Google Patents

Abstract

A method of photographing a portable terminal and a portable terminal for performing the method, which can easily confirm whether or not a focus is achieved when taking a picture by using a portable terminal and can take a clear picture. When the photographing mode is activated, the display area of the portable terminal is divided into a first area and a second area, an image picked up in the first area is displayed, and an area selected from the user is enlarged in the image picked up in the second area And then re-adjusting the focus of the imaged image so that the focused area is focused when an event indicating focus adjustment occurs. Accordingly, it is possible to easily confirm the focus of an image to be photographed, and to shoot a clear image by re-adjusting the focus through it.

Captured image, segmentation, enlargement, area, focus, adjustment

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of photographing a portable terminal,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable terminal, and more particularly, to a method of photographing a portable terminal, which can be applied to a portable terminal having a built-in camera, and a portable terminal for performing the method.

Portable terminals include mobile phones, PDAs (Personal Digital Assistants), PMPs (Portable Multimedia Players), UMPCs (Ultra Mobile Personal Computers), etc. The portable terminals gradually become smaller in size and light in weight.

In recent years, there is a growing interest in portable terminals that can use multiple functions. For example, attention has been focused on a mobile terminal including a wireless Internet service, a camera / camcorder function, a game function, an MP3 player function, and a DMB (Digital Multimedia Broadcasting) function.

In particular, a portable terminal with a built-in camera is widely used because of convenience of photographing or video shooting, and the image quality is approaching the level of a general digital camera due to the development of camera technology.

Of the additional services of the portable terminal as described above, the camera function is added for multimedia communication, and is used as a general camera in a state where it is not used for communication.

In order to accurately focus the image on the image sensor in the photographing of the portable terminal with the built-in camera, the focus is measured, the focal distance is measured, the focus is adjusted to the subject to be photographed, (OUT OF FOCUSING).

In the case of a general camera photographing, although the focus is set at the center of the composition formed by the photographed image, there are cases in which the photographed object or the object is not located at the center. In such a case, The composition is selected again and shot.

In the case of a digital camera for automatically selecting a focus, a one-point type frame system in which a focus is formed at the center of a composition formed by a photographed image and a multi-point type frame system in which a plurality of areas, Is used.

However, the portable terminal with a built-in camera has a disadvantage in that it is not possible to confirm whether the object or the subject is focused by the user at the time of photographing because the display device is small.

In addition, the above-mentioned portable terminal with a built-in camera has a disadvantage that it can automatically adjust the focus at the time of photographing but can not focus on the object or the subject desired by the user.

A first object of the present invention is to provide a method of photographing a portable terminal, which can easily confirm whether or not the focus is coincident when taking a picture by using a portable terminal, and can take a clear picture.

It is a second object of the present invention to provide a portable terminal having a photographing function capable of easily confirming whether or not a photograph is photographed using a portable terminal and photographing a clear photograph.

According to one aspect of the present invention, there is provided a method of photographing a portable terminal, the method comprising: when a photographing mode is activated, dividing a display area of the portable terminal into a first area and a second area Displaying an image picked up in the first area, enlarging and displaying a predetermined area from the user in the picked-up image in the second area, and, when an event instructing focus adjustment occurs, And re-adjusting the focus of the captured image so that the focused area is focused. Wherein the step of enlarging and displaying a region selected by the user in the captured image in the second region includes the steps of obtaining a coordinate value of the predetermined region, calculating a coordinate value of the selected region in the second region on the basis of the coordinate value Calculating an enlargement ratio to be displayed in an enlarged manner, and enlarging and displaying the predetermined area in the second area based on the enlargement ratio. Wherein the step of re-adjusting the focus of the picked-up image so as to focus on the predetermined region when an event to cause the focus adjustment occurs is performed by adjusting a focus distance of the camera lens, The focus of the captured image can be adjusted so as to fit the image. Wherein the step of re-adjusting the focus of the picked-up image so as to focus on the predetermined area when an event indicating the focus adjustment occurs is performed by adjusting a sharpness value of the camera, The focus of the captured image can be adjusted so as to fit the image. The step of re-adjusting the focus of the picked-up image so as to focus on the predetermined area when the event instructing the focus adjustment occurs may be performed by adjusting the aperture value of the camera to deepen the depth of the object, Can be adjusted. The method of photographing a portable terminal as set forth in claim 1, further comprising the steps of: determining an event instructing to shoot an enlarged image of the selected area; and, when an event instructing shooting of the enlarged image of the selected area is generated, And adjusting the angle of view for photographing the enlarged image of the image.

According to another aspect of the present invention, there is provided a portable terminal having a photographing function, wherein when the photographing mode is activated, a display area of the portable terminal is divided into a first area and a second area, And displays an image picked up in the first area, enlarges and displays a region selected from the user in the picked-up image in the second area, and then when an event for instructing focus adjustment occurs A control unit for re-adjusting the focus of the captured image so as to focus on the selected area, and a control unit for controlling the focus of the captured image corresponding to the photographed image corresponding to the captured image and / And a storage unit for storing the photographed image. The controller may adjust the focus distance of the camera lens to readjust the focus of the captured image so that the selected area is in focus. The controller may adjust the sharpness value of the camera to readjust the focus of the sensed image so as to focus on the predetermined area. The control unit may adjust the aperture value of the camera to deepen the depth of the subject to readjust the focus. Wherein the control unit judges an event instructing shooting of an enlarged image of the selected area and, when an event instructing shooting of the enlarged image of the selected area is generated, It is possible to readjust the angle of view.

According to the photographing method of the portable terminal and the portable terminal performing the same, when the photographing mode is activated, the portable terminal divides the display area into the first area and the second area, and displays the sensed image in the first area And enlarges a predetermined area from the user in the captured image and displays it on the second area. Thereafter, when the user adjusts the focus after confirming the second area, the portable terminal adjusts the focus of the captured image displayed in the first area so as to focus on the selected area.

Accordingly, it is possible to easily confirm the focus of an image to be photographed, and to shoot a clear image by re-adjusting the focus through it.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention. Like reference numerals are used for like elements in describing each drawing.

The terms first, second, A, B, etc. may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises" or "having" and the like are used to specify that there is a feature, a number, a step, an operation, an element, a component or a combination thereof described in the specification, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

Hereinafter, preferred embodiments according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a flowchart illustrating a photographing process of a portable terminal according to an exemplary embodiment of the present invention.

Referring to FIG. 1, the portable terminal according to the present invention determines whether a photograph photographing mode has been executed (step 101). If it is determined that the photograph photographing mode has been executed, the portable terminal classifies the display area into two areas (step 103). The display area may be divided into a first area in which an image sensed through a camera is displayed and a second area in which an area selected from the user is enlarged and displayed in the sensed image displayed in the first area.

The captured image shows a subject to be photographed in photographing in advance, and the structure and background of the subject can be confirmed through the photographed image.

In FIG. 1, the display area of the portable terminal is divided into the first area and the second area. However, in another embodiment of the present invention, the display area may be configured to be performed in a portable terminal having two display devices. For example, an image captured through a camera can be displayed on a first display device of the portable terminal having the two display devices, and a second display device can display a selected area on a captured image displayed on the first display device May be enlarged and displayed.

Then, the portable terminal displays the image photographed in the first divided area (step 105).

Next, the portable terminal selects a predetermined area for enlargement in the image picked up by the user, and obtains the coordinate value of the selected area (step 107). Here, the portable terminal can acquire the size and position of the selected region from the user through the coordinate values of the selected region.

Thereafter, the portable terminal calculates an enlargement ratio of the selected area based on the obtained coordinate values (step 109). Here, the portable terminal obtains the length and the length of the selected region from the user in the captured image displayed in the first region, and obtains the length and the length of the selected region based on the length and the length of the predetermined second region. The magnification ratio can be calculated.

Next, the portable terminal enlarges the selection area based on the calculated enlargement ratio and displays it on the second area (step 111). Here, the user can confirm whether the image captured in the first area is clear by checking the selected area enlarged and displayed in the second area. If the user does not focus on the selected area enlarged in the second area, the user generates an event for focus adjustment using a menu for focus adjustment displayed on the touch screen of the portable terminal or a preset key .

The portable terminal determines whether an event instructing focus adjustment is provided from the user (step 113). Here, the event for instructing the focus adjustment is for shooting a clear image by adjusting the focus when the focus is not in focus.

If it is determined in step 113 that an event instructing focus adjustment is provided from the user, the portable terminal re-adjusts the focus of the captured image displayed in the first area so as to focus on the selected area (step 115). In the case of a portable terminal having an optical focus adjustment function, the focus of the preview image displayed in the first area can be adjusted so that the selected area is in focus by adjusting the focal distance of the lens.

Further, in the case of a portable terminal having no optical focus adjustment function, the focus can be adjusted by adjusting a parameter value necessary for camera photographing. For example, it is possible to adjust the focus by adjusting the sharpness value among the parameters related to photographing, and by adjusting the aperture value among parameters related to photographing, the depth of the subject can be deepened to adjust the focus.

Alternatively, if it is determined in step 113 that an event instructing focus adjustment is not provided from the user, the portable terminal proceeds to step 117 without performing step 115 and performs the following steps.

Then, the portable terminal determines whether an event for instructing photographing has been generated (step 117). If an event for instructing photographing is generated, the portable terminal records the photographed subject and stores the photographed image (step 119). That is, the focus of the captured image is adjusted again, and then the captured image is stored.

2 illustrates a user interface displayed in the photographing process of the portable terminal shown in FIG.

Referring to FIG. 2, FIG. 2 (a) shows an example in which two display devices (i.e., a first display device and a second display device) are provided in a portable terminal. An image picked up by the first display device 201 of the portable terminal is displayed and when the user selects a predetermined selection area 202 to be enlarged in the captured image, the selected selection area is enlarged .

Accordingly, the user can check the second display device 203 to confirm whether the subject to be photographed is in focus, thereby providing convenience in use.

2B shows an example in which one display device of the portable terminal is divided into two display areas (i.e., a first area and a second area). The image picked up in the first area 205 of the portable terminal is displayed and when the user selects a predetermined selection area 206 to be enlarged in the captured image, the selected selection area is enlarged and displayed in the second area 207 .

Accordingly, the user can confirm whether the subject to be photographed is in focus by checking the second area 207, thereby providing convenience in use.

3 is a flowchart illustrating a photographing process of a portable terminal according to another embodiment of the present invention. In the photographing process of the portable terminal shown in FIG. 3, steps 101 to 115 perform the same process as steps 101 to 115 of the photographing process of the portable terminal shown in FIG. 1, A detailed description thereof will be omitted.

Referring to FIG. 3, after the focus of the image captured in step 115 is readjusted, the portable terminal displays an event that instructs shooting of an image obtained by enlarging a predetermined area from the user, Is provided (step 118).

Here, the user can select an image to be photographed by pressing a menu or a predetermined key displayed on the touch screen.

If it is determined at step 118 that an event instructing shooting of an enlarged image of the selected area is not provided, the portable terminal basically determines an image to be shot at the same angle of view as that of the captured image displayed in the first area 120).

Alternatively, if it is determined in step 118 that the event instructing the photographing of the enlarged image of the selected area is provided, the portable terminal displays the enlarged image of the area selected by the user (i.e., the image displayed in the second area) The image to be photographed at a corresponding angle of view is determined (step 126), and the angle of view for photographing the enlarged and predetermined area is readjusted (step 128).

Then, the portable terminal determines whether an event is instructed to take a picture (step 122), and if an event instructing taking a picture is taken, the portable terminal captures a subject corresponding to the captured image and stores the taken image (step 124 ). That is, the focus of the captured image is adjusted again, and then the captured image is stored.

FIG. 4 shows a photograph taken through a photographing method of a portable terminal according to an embodiment of the present invention.

4 (a) is an enlarged view of a region 402 selected by the user in the image captured in the first region 401 of the portable terminal, and FIG. 4 When the user confirms this and operates the menu or the key to readjust the focus so that the selected area 403 is sharpened, the focus of the selected area 407 is adjusted as shown in FIG. 4 (b) .

Thereafter, when the user takes a picture, a clear picture that focuses on the selected area can be obtained as shown in Fig. 4 (c).

As shown in FIGS. 1 to 4, according to the method of photographing a portable terminal according to an exemplary embodiment of the present invention, when the photographing mode is activated, the portable terminal divides the display area into a first area and a second area, Displays an image picked up in the separated first area, enlarges a predetermined area in the picked-up image, and displays the enlarged area in the second area. Thereafter, when the user checks the second area and adjusts the focus, the portable terminal captures a picture by adjusting the focus of the preview image displayed in the first area so that the selected area is in focus.

Accordingly, it is possible to easily confirm the focus of an image to be photographed, and to shoot a clear image by re-adjusting the focus through it.

5 is a block diagram illustrating a configuration of a portable terminal having a photographing function according to an exemplary embodiment of the present invention.

5, a portable terminal having a photographing function according to an exemplary embodiment of the present invention includes a camera unit 510, a control unit 520, a display unit 531, a key input unit 532, a storage unit 540 , A wireless transceiver 550, a microphone 560, and a speaker 570. [

The camera unit 510 may include a lens (not shown), a CCD image sensor (or a CMOS image sensor) (not shown), and an image processing module (not shown) Converts the photographed image into an image data form through image processing, and provides the converted image data to the control unit 520.

Here, the camera unit 510 adjusts the focal length of the lens (not shown) to focus the image based on the control of the controller 520.

The control unit 520 determines whether a photographing mode execution signal is inputted from the key input unit 532. If the photographing mode execution signal is inputted, the control unit 520 divides the display area of the display unit 531 into two areas.

The control unit 520 can divide the display unit 531 into a first area in which the captured image is displayed and a second area in which the area selected from the user is enlarged and displayed in the captured image displayed in the first area.

The control unit 520 provides an image captured in the first area of the display unit 531. [ Next, the control unit 520 selects a predetermined area for enlargement in the captured image displayed on the display unit 531, and obtains the coordinate value of the selected area. Here, the controller 520 can obtain the size and position of the selected region from the user through the coordinate values of the selected region.

Then, the control unit 520 calculates the enlargement ratio of the selected region based on the obtained coordinate values.

Here, the control unit 520 obtains the length and the length of the selected area from the user in the captured image displayed in the first area of the display unit 531, The enlargement ratio of the selected area can be calculated based on the length of the area.

Next, the control unit 520 enlarges the selected area on the basis of the calculated enlargement ratio and displays it on the second area of the display unit 531. [

The control unit 520 re-adjusts the focus of the captured image displayed in the first area of the display unit 531 so as to focus on the predetermined area, when an event signal for instructing focus adjustment is provided from the key input unit 532 . Here, the control unit 520 may adjust the focal distance of the lens included in the camera unit 510 and adjust the focus of the captured image displayed in the first area of the display unit 531 so that the selected area is focused .

Alternatively, the control unit 520 may adjust the focus by adjusting parameter values necessary for camera shooting. For example, the control unit 520 can adjust the focus by adjusting the sharpness value among the parameters related to photographing, adjust the aperture value among the parameters related to the photographing, and adjust the focus by deepening the depth of the subject have.

When an event signal for instructing photographing is provided from the key input unit 532, the control unit 520 stores the photographed image in the storage unit 540 after photographing the subject. That is, the control unit 520 re-adjusts the focus of the captured image displayed on the display unit 531, and then stores the captured image in the storage unit 540.

Alternatively, according to another embodiment of the present invention, the control unit 520 may adjust the focus of the captured image displayed on the display unit 531 and then enlarge the image picked up from the key input unit 532 and the selected area It is determined whether or not an event signal for instructing shooting of an enlarged image of a predetermined area of the image is provided.

If an event signal for instructing shooting of an image enlarged in a predetermined area from the key input unit 532 is not provided, the control unit 520 basically switches the display unit 531 to the first area, And determines an image to be photographed.

Alternatively, if an event signal for instructing shooting of an image enlarged by a predetermined area is provided from the key input unit 532, the control unit 520 may display an image obtained by enlarging an area selected by the user from the image captured by the display unit 531 That is, the image displayed in the second area), and re-adjusts the angle of view for photographing the enlarged selected area.

Then, the control unit 520 determines whether or not an event signal for instructing photographing is provided from the key input unit 532. If an event signal for instructing photographing is provided, the control unit 520 determines whether a subject corresponding to the sensed image of the display unit 531 And stores the photographed image in the storage unit 540. That is, the control unit 520 re-adjusts the focus of the captured image displayed on the display unit 531, and then stores the captured image in the storage unit 540.

The function of the control unit 520 may be performed by the graphic processing module 521. [ The graphic processing module 521 divides the display unit 531 into two areas when the photographing mode execution signal is inputted from the key input unit 532 and displays the enlarged selected area in the second area of the display unit 531, And adjusts the focus of the captured image so that the enlarged selected area is in focus.

The display unit 531 displays a user interface screen corresponding to the input key event based on the control of the control unit 520. When a predetermined application program is executed, Display the execution screen.

Here, the display unit 531 enlarges and displays the area selected by the user in the second area based on the control of the control unit 520 in the captured image displayed in the first area. Alternatively, according to another embodiment of the present invention, the display unit 531 may be divided into a first display device and a second display device under the control of the control unit 520. [ Here, the selected area of the captured image displayed on the first display device is magnified and displayed on the second display device.

The key input unit 533 includes a plurality of keys. When a predetermined key is operated by the user, the key input unit 533 converts the key code into a key code corresponding to the operated key, and provides the converted key code to the control unit 520.

5, the display unit 531 and the key input unit 533 are shown as being independent from each other. However, in another exemplary embodiment of the present invention, the display function of the display unit 531 and the key input unit 533 may be applied to the touch screen 530 at the same time.

The storage unit 540 may be a nonvolatile memory such as a RAM (Random Access Memory) and / or a flash memory, an EEPROM (Electrically Erasable and Programmable Read Only Memory) Programs (e.g., operating systems) and other application programs and / or data generated by the user may be stored.

In particular, the storage unit 540 stores the photographed image corresponding to the sensed image displayed in the first area of the display unit 531 under the control of the control unit 520. [ Alternatively, the storage unit 540 stores the photographed image corresponding to the enlarged selected area displayed on the second area of the display unit 531 under the control of the control unit 520. [

The wireless transceiver unit 550 may include a duplexer, a high frequency processor, and an intermediate frequency processor. The wireless transceiver 550 may receive a radio frequency (RF) signal transmitted through an antenna ANT through a duplexer, Converts the baseband signal provided from the control unit 520 into an intermediate frequency, converts the baseband signal to an intermediate frequency, and then converts the intermediate frequency signal back to a baseband signal It is possible to convert it into a radio frequency signal and provide it to the antenna ANT through a duplexer.

Alternatively, the wireless transceiver unit 550 may use a direct conversion method of directly demodulating a high frequency signal received without a frequency conversion, instead of the heterodyne receiving method of demodulating the high frequency signal as described above through an intermediate frequency conversion into a baseband signal have.

The microphone 560 receives a voice of a user at the time of voice communication, converts the received voice into an electrical signal, and provides the voice to the control unit 520. The speaker 570 receives the voice signal of the voice communication partner decoded from the voice codec (not shown) and outputs it as a signal of an audible frequency band.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims. It will be possible.

1 is a flowchart illustrating a photographing process of a portable terminal according to an exemplary embodiment of the present invention.

2 illustrates a user interface displayed in the photographing process of the portable terminal shown in FIG.

3 is a flowchart illustrating a photographing process of a portable terminal according to another embodiment of the present invention.

FIG. 4 shows a photograph taken through a photographing method of a portable terminal according to an embodiment of the present invention.

5 is a block diagram illustrating a configuration of a portable terminal having a photographing function according to an exemplary embodiment of the present invention.

Description of the Related Art

510: camera unit 520:

521: Graphic processing module 530: Touch screen

531: Display section 532: Key input section

550: wireless transmitting / receiving unit 560: microphone

570: Speaker

Claims (11)

A method of photographing a portable terminal having a built-in camera, Dividing a display area of the portable terminal into a first area and a second area when the photographing mode is activated; Displaying an image captured in the first area; Enlarging and displaying a region selected from the user in the captured image in the second region; Adjusting the focus of the image picked up in the first area and the magnified image in the second area so as to focus on the predetermined area when an event indicating focus adjustment occurs; And Selectively photographing an enlarged display image focused on the second area or a focused image focused on the first area, Wherein the step of enlarging and displaying the area selected by the user in the captured image in the second area comprises: Obtaining a coordinate value of the selected area; Calculating an enlargement ratio displayed by enlarging the predetermined region in the second region based on the coordinate value; And And enlarging and displaying the selected area in the second area based on the enlargement ratio. delete 2. The method of claim 1, wherein, in the event that an event indicating the focus adjustment occurs, re-adjusting the focus of the captured image so as to focus on the predetermined area, Adjusting the focal distance of the lens of the camera so as to readjust the focus of the sensed image so as to focus on the predetermined area. 2. The method of claim 1, wherein, in the event that an event indicating the focus adjustment occurs, re-adjusting the focus of the captured image so as to focus on the predetermined area, And adjusting the sharpness value of the camera to adjust the focus of the captured image. 2. The method of claim 1, wherein, in the event that an event indicating the focus adjustment occurs, re-adjusting the focus of the captured image so as to focus on the predetermined area, And adjusting the aperture value of the camera to deepen the depth of the subject to readjust the focus. The method according to claim 1, Determining an event that instructs to shoot an enlarged image of the selected area; And Further comprising the step of re-adjusting an angle of view for photographing an enlarged image of the selected area when an event instructing photographing of the enlarged image of the selected area is generated. A display area of the portable terminal is divided into a first area and a second area to display an image picked up in the first area when the photographing mode of the portable terminal equipped with the camera is activated, Adjusting the focus of the image picked up in the first area so as to focus on the predetermined area when an event instructing focus adjustment is generated after enlarging and displaying a predetermined area from the user in the image, ; And And a storage unit that stores a photographed image corresponding to the captured image and / or a photographed image corresponding to the enlarged selected area based on the control of the control unit, Wherein, Controlling the portable terminal to selectively photograph the picked-up image focused on the first area or an image of a predetermined area enlarged on the second area, and adjusting the sharpness value of the camera, Wherein the focus adjustment is performed so as to capture a clear image on the portable terminal. 8. The apparatus of claim 7, And adjusting the focal distance of the camera lens so as to readjust the focus of the captured image so as to focus on the predetermined area. delete 8. The apparatus of claim 7, And adjusting the aperture value of the camera to deepen the depth of the subject to readjust the focus of the subject. 8. The apparatus of claim 7, When an event for instructing shooting of an enlarged image of the selected area is generated and an event for instructing shooting of an enlarged image of the selected area is generated, The portable terminal having a photographing function.

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