KR20080028183A - Images control system and method thereof for potable device using a projection function - Google Patents

Abstract

An image control system of a portable terminal having a projection function and a method are provided to enable a user to select a background image of the terminal randomly based on moving image realization without limiting size of a display, thereby realizing a virtual studio function. A camera(120) takes at least one image. A memory(170) stores at least one of a portion of a background image and the current image, audio data combined with an audio signal, and transmission data. An input unit(130) generates an input signal. An RF(Radio Frequency) unit(110) downloads at least one of the background image and the audio data, and forms a communication channel for transceiving the transmission data. An audio processor(140) collects and reproduces the audio signal. A display(150) displays the current image, and provides a screen interface. A controller(160) controls generation, projection, and transmission of the transmission data.

Description

IMAGES CONTROL SYSTEM AND METHOD THEREOF FOR POTABLE DEVICE USING A PROJECTION FUNCTION}

1 is a view showing the configuration of an image control system of a portable terminal having a projection function according to an embodiment of the present invention;

2 is a view schematically showing the configuration of a mobile terminal of the present invention;

3 is a view schematically showing a detailed configuration of a control unit of the present invention;

4 is a view schematically showing a detailed configuration of an image synthesizing unit of the present invention;

5 is a flowchart illustrating an image control method of a portable terminal having a projection function according to an embodiment of the present invention;

6 is a diagram illustrating an image processing example according to the flow of the image control method of the present invention in a screen configuration.

The present invention relates to an image control system and method for a portable terminal having a projection function, and more particularly to an image control system and method for a portable terminal having a projection function capable of realizing a virtual studio in image synthesis after photographing a subject.

In order to reduce the size of the portable terminal, the development of the device and the development of the software have been made in order to reduce the size of the portable terminal, and as the development of the portable terminal has been repeated, various needs of many users have been met. Various optional features have been developed for this purpose. In particular, among the optional functions, the multimedia function and the DMB function require a display area of a predetermined size or more for displaying a moving image. Accordingly, a larger display unit is required for a camera phone, a mobile communication terminal such as a mobile phone and a PDA for moving picture service, and the like, and thus, the existing smallest terminals have recently increased in thickness and volume.

However, although the display of mobile communication terminals has recently increased for image or moving picture service, the size of the display of the mobile communication terminal has a lot of limitations to have a satisfactory size. Accordingly, in a video call and personal broadcast service to which a moving picture is applied, there is a demand for the appearance of a mobile communication terminal having a display unit having an appropriate size.

In addition, the existing mobile communication terminal can be a video call or a personal broadcast by transmitting and receiving the image currently being photographed using a camera, but the existing video call or personal broadcast is inevitably limited in the user's environment. That is, a user having a mobile communication terminal transmits an image and a moving picture to the other party with the environment of the place where the user is currently located as his background, for example, in an unsuitable environment such as a restroom or a specific place. In practice, there is no use of services such as video calls or personal broadcasting.

Therefore, the present invention was devised to solve the above-mentioned problems of the prior art, and an object of the present invention is to implement a virtual studio function by allowing a user to arbitrarily select a background of a terminal user based on a moving image without limitation of display size. The present invention provides a method of controlling an image of a portable terminal having a possible projection function.

According to an aspect of the present invention, there is provided a device including: a mobile terminal for generating transmission data by combining a pre-stored background image, a part of a current image currently being captured, and an audio signal; And a projector module for projecting the transmission data.

According to an embodiment of the present invention, a background image is selected; Collecting a current image and an audio signal in which a portion of the image is to be combined with the background image; Extracting a designated image from the current image; Generating a combined image by combining the extracted designated image with the background image; Generating transmission data by synchronizing the combined image with the audio signal; And projecting the generated transmission data through a projector.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, only the parts necessary for understanding the operation according to the embodiment of the present invention will be described, it should be noted that the description of other parts will be omitted so as not to distract from the gist of the present invention.

The terms or words used in the specification and claims described below should not be construed as being limited to the ordinary or dictionary meanings, and the inventors are appropriate to the concept of terms in order to explain their invention in the best way. It should be interpreted as meanings and concepts in accordance with the technical spirit of the present invention based on the principle that it can be defined. Therefore, the embodiments described in the specification and the drawings shown in the drawings are only one of the most preferred embodiments of the present invention, and do not represent all of the technical idea of the present invention, various modifications that can be replaced at the time of the present application It should be understood that there may be equivalents and variations.

For example, an embodiment using a video call, a personal broadcast, and the like provided by a mobile terminal will be described below. However, the image control system and method of the portable terminal of the present invention are not limited thereto. That is, the video control system and method of a portable terminal having a projection function according to an exemplary embodiment of the present invention enable arbitrary selection of a background for transmitting and receiving images and moving images, such as moving image messages as well as video calls and personal broadcasting. Various services using image transmission and reception and extended and modified forms of the above-described services may also be applied in various ways.

In addition, in the following description, the portable terminal is divided into a receiving terminal and a transmitting terminal in order to clarify the gist of the invention and to facilitate the explanation and understanding thereof. The portable terminal according to the exemplary embodiment of the present invention can implement both the transmitting service and the receiving service.

In the following description, an activation menu selection of a projector module for projecting a combined image of a current image and a background image according to an embodiment of the present invention will be defined as a virtual studio mode. The virtual studio mode may be set to be automatically switched when the portable terminal and the projector module are combined, and may be switched when the projector module is combined after designating the virtual studio mode according to a user's menu selection.

In addition, in the embodiment of the present invention, the mobile terminal will be described using a mobile communication terminal as an example, but the present invention is not limited thereto. Therefore, the portable terminal according to an embodiment of the present invention is a terminal capable of storing voice information or receiving voice information at a specified time, and is preferably a mobile communication terminal, a digital broadcasting terminal, or a personal digital assistant (PDA). Assistant (Smart Phone), International Mobile Telecommunication 2000 (IMT-2000) terminal, Wideband Code Division Multiple Access (WCDMA) terminal and Universal Mobile Telecommunication Service (UMTS) terminal, portable Internet terminal, high speed downlink packet Applicable to all information communication devices and multimedia devices such as terminals, and applications thereof.

1 is a view showing the appearance of an image control system of a portable terminal having a projection function according to an embodiment of the present invention, Figure 2 is a block diagram showing each configuration of the portable terminal of the present invention.

1 and 2, an image control system of a mobile terminal according to an embodiment of the present invention includes a camera 120, a memory 170, a key input unit 130, a radio frequency unit 110, and an audio processing unit ( 140, a portable terminal 100 including a display unit 150 and a control unit 160, and a projector module 200 on which the portable terminal 100 is mounted.

The camera 120 receives a data signal by capturing a predetermined image, and performs digital signal conversion of the received image data through linkage with an encoder (not shown). The camera 120 captures an image that can be used as a background image (Back_Img) under the control of the controller 160, and stores the image in the memory 170. The camera 120 receives power while capturing the current image (Now_Img). Photographed and provided to the controller 160.

The memory 170 temporarily or semi-permanently stores the taken current image (Now_Img) necessary for a video call and personal broadcasting, including an application program required for operating a function according to an embodiment of the present invention, and the current image (Now_Img). ) And the background image (Back_Img) to be combined. The memory 170 may largely include a program area and a data area.

The program area may include an operating system (OS) for booting the mobile terminal 100, an application required for multimedia playback, other options of the mobile terminal 100, for example, a sound playback function, an image or video playback function. Store applications, etc. required.

In particular, the program area stores a camera application (Camera.App) for controlling the camera 120 of the present invention and an image control application (IMG.App) for image synthesis according to the present invention. The camera application Camera.App controls the operation of the camera 120 under the control of the controller 160, and the image control application IMG.App includes the current image and / or the current image including the captured video. ) And the background image Back_Img specified by the user are synthesized to generate a combined image Conv_Img, and the generated combined image Conv_Img is transmitted to the projector module 200. When the mobile terminal 100 activates each of the above functions in response to a user request, the mobile terminal 100 provides the respective functions by using corresponding application programs under the control of the controller 160.

The data area is an area in which data generated according to the use of the mobile terminal 100 is stored. In addition, the data area stores a current image (Now_Img) captured by the camera 120 and is used by a user to capture a background of a specific image. Alternatively, the background image (Back_Img) downloaded from the outside is stored. The data area may temporarily or semi-permanently store the combined image Conv_Img in which the current image Now_Img and the background image Back_Img are combined with each other according to activation of the image control application IMG.App. have. The data area may store an audio signal A_sig input from the outside or audio data A_Data downloaded from a communication channel formed with the outside. The memory 170 transmits, to the projector module 200, the transmission data Tr_Data combining the combined image Conv_Img, the audio signal A_sig, and the audio data A_Data under the control of the controller 160. . The data area may temporarily or semi-permanently store transmission data (Tr_Data) currently transmitted and received when receiving a video call and a personal broadcast.

The key input unit 130 includes a plurality of input keys and function keys for receiving numeric or character information and setting various functions. The function keys may include direction keys, side keys, shortcut keys, and the like, which are set to perform a specific function. In addition, the key input unit 130 transmits a key signal input in relation to user setting and function control of the portable terminal 100 to the controller 160.

In particular, the key input unit 130 generates a key input signal for selecting a virtual studio mode of a menu capable of combining the current image Now_Img and the background image Back_Img according to an embodiment of the present invention. The key input unit 130 generates a key input signal for selecting a background image (Back_Img) and other camera 120 operation control according to the virtual studio mode selection, and transmits the generated key input signal to the controller 160.

The radio frequency unit 110 wirelessly transmits user data to another external mobile terminal or the like or transmits and receives the transmission data (Tr_Data) through interworking with an external web server and a WAP server. It is responsible for a series of communications. The radio frequency unit 110 may include a radio frequency transmitter for upconverting and amplifying a frequency of a transmitted signal, and a radio frequency receiver for low noise amplifying and downconverting a received signal.

In particular, the radio frequency unit 110 transmits the transmission data (Tr_Data) to the mobile communication system or an external WAP server according to an embodiment of the present invention, the radio frequency unit of the other terminal is the transmission data (Tr_Data) Receive

The audio processor 140 reproduces an audio signal such as a voice required for a call or transmits an audio signal A_sig such as a voice input from a microphone to the controller 160. In particular, the audio processor 140 of the present invention may provide the audio signal A_sig to the controller 160 to integrate the audio signal A_sig input from the microphone with the combined image Conv_Img.

The display unit 150 displays various menus of the mobile terminal 100, information input by the user, or information provided to the user. In particular, the display unit 150 may be selectively on-off according to the operation of the projector module 200 according to an embodiment of the present invention. In detail, the display unit 150 provides a menu interface for entering the virtual studio mode when the user wants to view the combined image Conv_Img on the projector module 200. In addition, the display unit 150 displays a message for activating the projector module 200 according to the selection of the virtual studio mode selected in the menu interface, and when the projector module 200 is activated, the display unit 150 is automatically turned off. In addition, the transmission data (Tr_Data) may be displayed by being kept on according to a user's selection. Meanwhile, the display unit 150 may be formed of a liquid crystal display (hereinafter, referred to as an LCD). When the LCD is formed in the form of a touch screen, the display unit 150 may be used. ) May be included in the input means.

The controller 160 controls the overall operation of the portable terminal 100 and a signal flow between internal blocks of the portable terminal 100. The controller 160 may include functions of a modem and a codec.

The controller 160 converts and outputs an image signal output from the camera 120 into an image signal and generates screen data for displaying the output image signal. The controller 160 may transmit and receive an image signal transmitted and received, for example, the combined image Conv_Img according to the standard of the display unit 150, and may compress and decompress the video data.

In particular, the controller 160 according to the present invention separates the background image and the designated image (Sel_Img) from the current image (Now_Img), synthesizes the designated image (Sel_Img) and the background image (Back_Img) to combine the combined image (Conv_Img). In addition, the audio signal A_sig collected through the audio processor 140 is synthesized to the combined image Conv_Img to generate transmission data Tr_Data. To this end, the controller 160 includes an image separator 162, an image synthesizer 164, and an audio synthesizer 166 as shown in FIG.

The image separator 162 separates the background image and the designated image Sel_Img from the current image Now_Img. To this end, the image separator 162 scans the images of the current image Now_Img and separates the specified image Sel_Img and the background image by using a method of extracting a boundary value from the image. The boundary value is an area where a color change occurs rapidly on one image, and represents a boundary between the background image and the designated image (Sel_Img). The boundary value is used to distinguish the specified image (Sel_Img) from the background image. Thereafter, the image separator 162 selects the designated image Sel_Img according to the signal input from the key input unit 130, and separates the selected designated image Sel_Img from the background image to have an image, ie, a chroma key. It will be saved as (Chroma Key) image. The image separator 162 may separate the background image and the designated image Sel_Img in the same manner as the above-described method not only for the still image but also for the moving image.

The image synthesizer 164 generates a combined image Conv_Img by synthesizing the background image Back_Img selected by the user and the designated image Sel_Img stored with the chroma key. To this end, the image synthesizing unit 164 includes a subtraction processing unit 301, a noise processing unit 302, an image scalar processing unit 303, a dynamic synchronization processing unit 304, and a synthesis processing unit 305 as shown in FIG. 4. It is configured by.

The subtraction processor 301 performs a filter function to extract the optimal designated image Sel_Img by removing the background image corresponding to the background from the current image Now_Img received from the camera 120.

The noise processing unit 302 is a processing unit for removing noise, but even if the image is obtained from the camera 120 in a fixed place, the value of the image changes with the change of time. In particular, the background generates a large amount of noise due to light reflection. Perform noise reduction on it.

In the case of a video image, the size of the image scalar processing unit 303 varies depending on the format or the encoded state. In this case, the image scalar processing unit 303 automatically converts the size of the image according to the network transmission size.

The dynamic synchronization processor 304 is a processor that solves a frame sync problem of the current image No_Img input from the camera 120 and the background image Back_Img combined with some images of the current image No_Img.

The synthesizing unit 305 performs a function of smoothly synthesizing the video stream data of the background image (Back_Img) from the current image (Now_Img) input from the camera 120 except for the designated image (Sel_Img), for example, a human object. .

If there is a sound associated with a previously stored background image (Back_Img), the audio synthesizer 166 extracts the sound and collects the audio signal A_sig and memory 170 that are currently collected through the audio processor 140. ) Collects and combines the audio data (A_Data) previously stored in the user's selection to generate a sound mix (S_mix) to combine with the combined image (Conv_Img) to generate the transmission data (Tr_Data). Here, the audio signal A_sig may add a sound effect for an effect. The audio synthesizer 166 mixes a sound received by the radio frequency unit 110 of the mobile terminal, audio data such as MP3 and Advanced Audio Coding (AAC), sound associated with a background image (Back_Img), and a sound mix. (S_mix) is generated, and the transmission data (Tr_Data) is generated by synchronizing the sound mix (S_mix) with the combined image (Conv_Img) generated by the image synthesizer 164. Here, the audio synthesizer 166 may attach various effects such as echo and chorus when generating the sound mix S_mix.

The projector module 200 is a device connected to the mobile terminal and capable of enlarging and displaying an image signal transmitted from the mobile terminal. The projector module 200 includes a projector 220 that enlarges and irradiates an input image and a cradle 210 that supports the projector 220 and the mobile terminal 100. In the present invention, the projector module 200 is described in a form in which the projector 220 and the cradle 210 are separately provided and combined, but the lens, the beam generator, the image signal input unit, etc. constituting the projector 220 in the cradle 210. By providing a cradle 210 may perform the projector 220 function. That is, the projector module 200 of the present invention may be formed in a cradle form having a projection function by integrating the cradle 210 and the projector 220. That is, the projector module 200 according to an exemplary embodiment of the present invention may include an image signal input unit for inputting an image signal, a beam generator for converting the image signal into light, and a projection integrated with lenses for projecting light from the beam generator. It may be formed of a cradle having a function.

The projector 220, which can be applied to an embodiment of the present invention, is a device that displays an image enlarged through a lens on a screen by receiving signals from various video devices such as a TV, a VCR, a DVD player, a PC, a camcorder, and a beam. A projector, a liquid crystal display (LCD) projector, and a digital light processing (DLP) projector may be applied.

The cradle 210 is manufactured in an “L” shape and the portable terminal 100 is seated on the curved seating portion, and when the mobile terminal 100 is mounted, the projector input terminal formed on one side of the portable terminal 100 and the cradle 210 are coupled to each other. The image signal of the terminal 100 is transmitted to the projector 220. The cradle 210 is preferably manufactured to a predetermined weight or more so that the cradle 210 may be fixed when the portable terminal 100 is mounted, and the lens of the projector 220 may be rotated so that the user can select a projection direction.

The image control system of a portable terminal having a projection function according to the present invention should perform data transmission in order to use the captured image in a video call and personal broadcast, and the data transmitted and received is WAP and image provided by the mobile communication system. Can transmit and receive using the call channel.

Meanwhile, FIG. 2 illustrates a block configuration for explaining an operation according to an embodiment of the present invention for convenience of description, but the present invention is not limited to this configuration. Therefore, the mobile terminal 100 of the present invention may further include a multimedia module and / or a digital broadcasting module according to the provision form thereof.

In the above, the configuration of the image control system of the portable terminal having the projection function according to an embodiment of the present invention has been described. Hereinafter, an image control method of a portable terminal having a projection function according to an embodiment of the present invention will be described.

5 is a flowchart illustrating an image control method of a portable terminal having a projection function according to an embodiment of the present invention, and FIG. 6 is a diagram illustrating an example of an image screen according to the image control method of the present invention.

5 and 6, the image control method of the present invention first checks whether the mobile terminal 100 is in a virtual studio mode (S101).

In step S101, the controller 160 confirms the virtual studio mode for use of the projector module 200 according to the present invention, and according to the selection of the virtual studio mode, the image control method of the mobile terminal of the present invention described below. To perform. The user may access the virtual studio mode through a menu, and when the portable terminal 100 and the projector module 200 are combined, the portable terminal 100 may be automatically switched to the virtual studio mode.

Next, the controller 160 selects a background image Back_Img stored in the memory 170 (S102).

In step S102, the controller 160 selects one of the background images Back_Img previously stored in the memory 170. The background image Back_Img may be an image previously photographed by the camera 120, and may be downloaded and stored from the outside using a communication channel through the radio frequency unit 110.

Next, the controller 160 activates the camera 120 to capture an image (S103).

In step S103, the controller 160 activates the camera 120 to capture the current image (Now_Img). In this case, the display unit 150 may display an image currently being focused by the camera 120.

In step S101, in the virtual studio mode, the controller 160 determines whether to add pre-stored audio data (A_Data) to the currently input audio signal (A_sig) (S104), and audio data (A_Data). When additionally selecting, the audio data A_Data stored in the memory 170 is selected (S105). In step S104, if there is no audio data A_Data addition, no additional audio data A_Data is added to the audio signal A_sig.

In step S105, the audio data A_Data may include data associated with the background image Back_Img and data downloaded from the outside.

Next, the controller 160 activates the microphone MIC for inputting the audio signal A_sig (S106).

In step S106, the controller 160 activates the microphone MIC to collect an audio signal A_sig that occurs simultaneously with collecting the current image Now_Img.

Thereafter, the controller 160 collects the current image Now_Img using the camera 120 and collects the audio signal A_sig using the microphone MIC (S107).

In step S107, the controller 160 collects, for example, an image, such as a face or a body of the user, that the user wants to transmit as a current image (Now_Img), and collects a voice or sound to be transmitted to the other party. The microphone MIC is used to collect the audio signal A_sig.

Next, the controller 160 separates the designated image (Sel_Img) and the background image from the collected current image (Now_Img) (S108).

In step S108, the controller 160 distinguishes the designated image (Sel_Img) and the background image by scanning each image of the current image (Now_Img) and extracting a boundary value from the scanned image, and designating the image on the separated image. The image Sel_Img is separated from the background image. In this case, the specified image Sel_Img and the background image may be separated into divisions of boundary regions in which the pixel difference is rapidly changed.

Next, the controller 160 temporarily stores the designated image Sel_Img in the memory 170 (S109).

In step S109, the controller 160 extracts the designated image Sel_Img and stores the specified image Sel_Img in the memory 170 as a chroma key image.

Next, the controller 160 generates the combined image Conv_Img by combining the designated image Sel_Img and the background image Back_Img selected in step S102 (S110).

In operation S110, the controller 160 combines the chroma keyed designated image Sel_Img onto the background image Back_Img using the synthesis processor 305 to generate a combined image Conv_Img.

Meanwhile, after collecting the audio signal A_sig, the controller 160 determines whether to add an effect to the collected audio signal A_sig (S111), and when the effect is added, edits the audio signal A_sig according to the effect. (S112). In step S111, if there is no effect selection, the controller 160 transfers the collected audio signal A_sig to the next step without editing.

In step S111, the effect may include subtraction and addition filters for editing the audio signal A_sig to a specific sound desired by the user, and the filter may include an echo and a chorus. The step S111 may be used when a user using a personal broadcast wants to create a special atmosphere and notify an event.

Next, the controller 160 checks whether the audio data A_Data is selected in step S104 (S113), and if the selected audio data A_Data exists, the audio signal A_sig and the audio data ( A_Data) is mixed to generate a sound mix S_mix (S114). In step S113, if the selected audio data A_Data does not exist, the audio signal A_sig is transferred to the next step without mixing.

Thereafter, the controller 160 combines the combined image Conv_Img generated in step S110 and the audio signal A_sig of step S113 or the sound mix S_mix generated in step S114 with each other to transmit transmission data Tr_Data. It generates (S115).

In step S115, the controller 160 generates transmission data Tr_Data by adjusting and synchronizing the combined image Conv_Img and the audio signal A_sig.

Next, the controller 160 activates the projector module 200 to display the transmission data Tr_Data, and projects the transmission data Tr_Data after activation of the projector module 200 (S116).

In step S116, the controller 160 transmits the transmission data Tr_Data to the projector 220, and the projector 220 projects the combined image Conv_Img among the transmission data Tr_Data. Meanwhile, the audio processor 140 reproduces the sound mix signal S_mix included in the transmission data Tr_Data through the speaker SPK in synchronization with the combined image Conv_Img.

On the other hand, the controller 160 transmits the generated transmission data (Tr_Data) to the outside through the communication channel generated by the radio frequency unit 110 (S117).

In the step S117, an embodiment used for external transmission may be a personal broadcast and a video call. In personal broadcasting, the camera 120 of the mobile terminal 100 captures an anchor or moderator for broadcasting to generate a current image (Now_Img), and the selected background image (Back_Img) and the current image stored in the memory 170. A designated image of (Now_Img) For example, a moderator is extracted as a designated image (Sel_Img) and then edited as a chroma key image. Subsequently, the controller 160 combines the designated image Sel_Img and the background image Back_Img to generate a combined image Conv_Img, and collects the collected audio signal A_sig and a sound mix S_mix in an edited form. The transmission data Tr_Data is generated by combining with the combined image Conv_Img. Next, the control unit 160 transmits the transmission data (Tr_Data) to the projector 220 and the radio frequency unit 110, respectively, while checking the transmission data (Tr_Data) to be broadcasted in real time. Personal broadcasting can be performed.

In the video call, the transmission data (Tr_Data) is transmitted to the other party's mobile terminal 100, and the other party's transmission data (Tr_Data) is each transmitted to the user's mobile terminal 100 and reproduced through the projector module 200. As a result, the transmission data Tr_Data transmitted and received during the video call can be viewed using the projector 220.

The image control system and method of a portable terminal having a projection function according to an embodiment of the present invention described above can produce a virtual studio using a portable terminal and a projector module without making a physical set that requires a high cost, and using the same. Broadcast programs can be produced and broadcast in various forms.

As described above, in the detailed description of the present invention has been described with respect to specific embodiments, various modifications are possible without departing from the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below, but also by the equivalents of the claims.

As described above, according to the video control system method of the portable terminal having the projection function of the present invention proposed by the present invention, the user can select a background of the terminal user arbitrarily based on a moving picture without limiting the size of the display unit. Function implementation is possible.

Claims (11)

Selecting a background image; Collecting a current image and an audio signal in which a portion of the image is to be combined with the background image; Extracting a designated image from the current image; Generating a combined image by combining the extracted designated image with the background image; Generating transmission data by synchronously adjusting the combined image and the audio signal; And And projecting the generated transmission data through a projector to form a virtual studio. The method of claim 1, The audio signal synchronized with the combined image is Editing the audio signal by applying a subtraction or addition filter to give a specific effect to the audio signal; And Combining previously stored audio data with the audio signal; Image control method of a portable terminal having a projection function, characterized in that performing at least one of the steps. The method of claim 1, Extracting the designated image Scanning the current image; Extracting a boundary value at which a difference of pixels occurs by a predetermined reference value or more from the scanned image; Dividing and separating a designated image and a background image other than the designated image based on the extracted boundary value; Generating the separated designated image as a chroma key image having a specific color as a background; And And temporarily storing the generated chroma key image. The method of claim 1, And transmitting the generated transmission data to the outside using a communication channel. The method of claim 1, The current video is An image control method for a portable terminal having a projection function, characterized in that it is a still image or a moving image. A mobile terminal for generating transmission data by combining a pre-stored background image, a part of an image currently being captured, and an audio signal; And And a projector module for projecting the transmission data to provide a virtual studio environment. The method of claim 6, The mobile terminal A camera for capturing at least one of the current image and the background image; A memory configured to store at least one of the background image and a portion of the current image, audio data coupled to the audio signal, and the transmission data; An input unit for generating an input signal for controlling the camera; A radio frequency unit for downloading at least one of the background image and the audio data from the outside and forming a communication channel for transmitting and receiving the transmission data; An audio processor for collecting and reproducing the audio signal; A display unit which displays the current image and provides a screen interface for controlling the camera and controlling the radio frequency unit; And a control unit for controlling signal flows between the camera, the memory, the input unit, the radio frequency unit, the audio processing unit, and the display unit, and controlling the transmission data generation, projection, and transmission. Image control system of a mobile terminal having. The method of claim 7, wherein The control unit An image separator for separating a designated image and a background image from the current image and editing the designated image as a chroma key image; An image synthesizer configured to combine the designated image and the background image to generate a combined image; And An audio synthesizer configured to generate a sound mix by editing the audio signal to have a specific effect and combining the audio signal associated with the background image or downloaded from the outside with the audio signal; Image control system of a mobile terminal having a. The method of claim 8, The image synthesizer A subtraction processor which removes the background image from the current image; A noise processor to remove noise of the image; An image scalar processing unit for automatically converting the size of the transmission data according to a network state; A dynamic synchronization processor configured to process frame sync between the current image and the background image; And And a synthesis processor for synthesizing the designated image and the background image. The method of claim 6, The projector module A projector for magnifying and irradiating an input image; And And a cradle supporting the projector and the portable terminal. The image control system of the portable terminal having a projection function. The method of claim 6, The projector module A cradle having a projection function integrated with an image signal input unit for inputting an image signal, a beam generator for converting the image signal into light, and lenses for projecting light from the beam generator. Video control system.

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