KR100734003B1 - User terminal capable of function selection using camera and function selection method thereof - Google Patents

Abstract

A mobile communication terminal making it possible to select a function by using a camera and a function selecting method thereof are provided to maximize usage rate of parts by using the camera. A mobile communication terminal making it possible to select a function by using a camera comprises a memory(155), a camera unit(120), and a controller(150). The memory(155) stores information on hand shapes matched with each function which can be selected in the mobile communication terminal. The camera unit(120) takes an image of hand shapes of a user, generates the taken image and outputs the taken image. The controller(150) compares the taken image with the information about the hand shapes stored at the memory, and recognizes the function matched with the information on the hand shape if there is the information on the hand shape identical to the image. The information on the hand shape is location vector information matched with location of a finger.

Description

User terminal capable of function selection using camera and function selection method

1 is a block diagram of a mobile communication terminal according to an embodiment of the present invention.

2 is an external view of a mobile communication terminal according to an embodiment of the present invention.

3 is a flowchart illustrating a function selection method using a camera unit in a mobile communication terminal according to an embodiment of the present invention.

4 is a diagram illustrating a method of obtaining an extracted image from an original image.

5 is a table illustrating the shape of a user's hand that can be set corresponding to a function provided in a mobile communication terminal.

6 and 7 illustrate a method of recognizing a hand shape from an extracted image using a shape recognition program.

<Description of the symbols for the main parts of the drawings>

100: mobile communication terminal

110: display unit

120: camera unit

125: image processing unit

130: input unit

150: control unit

155: memory section

The present invention relates to a mobile communication terminal, and more particularly, to a mobile communication terminal capable of selecting a function using a camera and a method of selecting the function.

Due to the rapid spread of mobile communication terminals, mobile communication terminals have become an essential means of communication in modern life, such as a large amount of communication occurring in human relationships through mobile communication terminals. In addition, with the rapid development of wireless communication and data communication technology, the mobile communication terminal has various functions in addition to the basic voice call function. Accordingly, users' demands for additional functions such as message transmission, personal schedule management, phone number search, Internet search, broadcast reception, and video or music playback using a mobile communication terminal are increasing day by day.

As a method of selecting a function included in the mobile communication terminal, the most commonly used method is a method of directly pressing a plurality of key buttons including a menu key on a key pad of the mobile communication terminal. That is, the user presses a menu key provided in the mobile communication terminal, and then moves to a position where the function icon is displayed by operating the direction key (or cursor movement key) several times in various menus (functions) displayed on the LCD screen. By selecting the function icon of the position using the selection key, the corresponding function to be used can be used.

However, the conventional method for selecting a function in a mobile communication terminal has a problem that a user must go through a complicated process such as requiring several button operations to find a function to be used. In particular, although the functions frequently used by the user are relatively limited compared to the various and diverse functions of the recent mobile communication terminal, the user must go through the complicated process as described above every time to select the corresponding function. It can be cumbersome.

In addition, the conventional method for selecting a function in a mobile communication terminal has a problem in that a button and menu operation require a lot of time and effort for the user to select a function.

Accordingly, an object of the present invention is to provide a mobile communication terminal capable of selecting a function using a camera that allows a user to select a function more easily and quickly, and a method of selecting the function.

Another object of the present invention is to provide a mobile communication terminal capable of selecting a function using a camera capable of maximizing component utilization by allowing the provided camera to be used universally and a method of selecting the function.

It is still another object of the present invention to provide a mobile communication terminal capable of selecting a function using a camera that may cause an interest to a user, away from the existing monotonous function selection method through a key button, and a method of selecting the function.

Other objects of the present invention will be readily understood through the following description.

According to an aspect of the present invention, there is provided a mobile communication terminal having an imaging function, comprising: a memory unit for storing hand shape information corresponding to each function selectable from the mobile communication terminal; A camera unit generating and outputting image data photographing a user's hand; And a control unit for comparing the image data output from the camera unit with the hand shape information stored in the memory unit and recognizing a function corresponding to the matching hand shape information, wherein the hand shape information is position vector information corresponding to the position of the finger. A mobile communication terminal can be provided.

In addition, the mobile communication terminal according to the present invention may further include an image processing unit for removing an image other than the user's hand from the image data output from the camera unit.

According to another aspect of the present invention, a mobile communication terminal having an imaging function, comprising: (a) generating image data of a user's hand through a camera unit; (b) determining whether or not the image data matches the shape information of the hand stored in the memory unit; And (c) selecting a function corresponding to the hand information corresponding to the image data, wherein the hand information is a position vector information corresponding to the position of the finger. have.

In addition, according to the method for selecting a function in the mobile communication terminal according to the present invention, the method may further include extracting only the user's hand from the image data before step (b).

The following merely illustrates the principles of the invention. Thus, although not clearly described or illustrated herein, one of ordinary skill in the art would be able to invent various methods that implement the principles of the invention and are included in the concepts and scope of the invention and apparatuses using the same. In other words, it is to be understood that all details, including the principles, aspects, and embodiments of the present invention, as well as listing specific embodiments, are intended to include structural and functional equivalents. In addition, in describing the present invention, when it is determined that the detailed description of the related known technology may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be denoted by the same reference numerals regardless of the reference numerals and redundant description thereof will be omitted.

1 is a block diagram of a mobile communication terminal according to an embodiment of the present invention, Figure 2 is an external view of a mobile communication terminal according to an embodiment of the present invention. In the following description, the mobile communication terminal 100 is used as a term referring to various information communication devices, including a PDA, and the like, and various forms such as a folder type and a slide type in addition to the bar type illustrated in FIG. 2. Of course it can have.

1 and 2, the mobile communication terminal 100 according to the present invention includes a display unit 110, a camera unit 120, an image processing unit 125, an input unit 130, a controller 150, and a memory unit ( 155, a wireless unit 160, and a handset 170.

The wireless unit 150 performs a wireless communication function of the mobile communication terminal 100. The radio unit 150 includes an RF unit and a radio processor. The RF unit includes a radio frequency (RF) transmitter for upconverting and amplifying a frequency of a transmitted signal, an RF receiver for downconverting and low noise amplifying a frequency of a received signal. The wireless processor may be configured with a modem, a codec, and the like. The modem modulates and encodes a signal transmitted through the RF transmitter, and demodulates and decodes the signal received through the RF receiver. The codec includes a data codec for processing character and numeric data to be transmitted and received, an audio codec for processing voice data to be transmitted and received, and the like.

The handset 160 outputs the received voice data received from the audio codec of the wireless processor or transmits the transmitted voice data received through the microphone to the audio codec of the wireless processor.

The input unit 130 allows a user to select text and numeric data or to select various functions (eg, a phone call, a message transmission, an internet search, etc.) that the mobile communication terminal 100 has. Provide a user interface. Of course, when the image data photographed through the camera unit 120 can be performed by recognizing the selected menu function, a function button (for example, phone call, message transmission, Internet search, etc.) in the input unit 130. May be omitted. In this case, the mobile communication terminal can be miniaturized or used for other purposes as much as the area where the function button existed.

The input unit 130 may be implemented in the same or similar form or manner as the input unit in a general mobile communication terminal (for example, a button type keypad provided with a plurality of key buttons as illustrated in FIG. 2). have. Of course, it is obvious that the present invention may be implemented in various forms or methods, such as a touch screen method. If the input unit 130 is implemented as a touch screen method, the display unit 110 described above will also perform a function as the input unit 130. However, in the following description, it is assumed that the input unit 130 is implemented as a button-type keypad as illustrated in FIG. 2.

The camera unit 120 converts the captured image into an electrical image signal (analog image signal) and outputs the image sensor, and an analog image signal input from the image sensor is referred to as a digital image signal (hereinafter referred to as 'original image data'). Signal processing unit to convert

The image sensor may be a Charge Coupled Device (CCD) sensor, a Complementary Metal-Oxide Semiconductor (CMOS) sensor, or the like, and the signal processor may be a digital signal processor (DSP) or the like. In this case, the image sensor and the signal processor may be integrally implemented or separated.

The image processor 125 performs a function of generating image data processed from the original image data input from the camera unit 120 (hereinafter referred to as 'processed image data').

Here, the image processor 125 may include an image codec and a scaler. The image codec performs a function of encoding original image data or decoding the compressed image data to original image data. At this time, any one of various image codecs, such as JPEG and MPEG, can be selected as an image codec. The scaler performs a function of scaling the original image data into image data having a size and the number of pixels that can be displayed on the display unit 110. In addition, the image processing unit 125 receives a specific program for image processing stored in the program memory of the memory unit 155 to be described later through the control unit 150, and adjusts the brightness of the original image data using the same. The user may generate image data having a desired image quality. By performing all or some of these processes, the image processor 125 may generate the processed image data.

The display unit 110 may display various data including image data stored in the memory unit 155 to be described later on the screen according to an instruction of the controller 150. In addition, the input data input through the input unit 130 may be displayed on the screen according to the instruction of the control unit 150. Here, the liquid crystal display (LCD), organic light emitting diodes (OLED), or the like may be used as the display unit 110. The display unit 110 may further include a separate display memory for storing processed image data. have.

The memory unit 155 stores various programs for controlling the overall operation of the mobile communication terminal, data generated by program execution, captured image data, and the like. The memory unit 155 may be implemented as an integrated memory or may be divided into a plurality of memory units (eg, a program memory, a data memory, an image memory, etc.). In this case, the original image data itself may be stored in the image memory, or the processed image data whose image quality or size is adjusted through the image processor 125 may be stored.

In particular, the memory unit 155 according to the present invention includes information about each hand shape (see FIG. 5) defined in advance or defined by the user corresponding to various functions included in the mobile communication terminal 100. Can be stored. Here, the hand information may be image information or data information about the corresponding image (hereinafter, referred to as a 'hand database'). Therefore, the hand database may be stored in the image memory or the data memory. In this case, various functions of the mobile communication terminal 100 corresponding to the hand-shaped database may also be stored in the data memory of the memory unit 155 as previously defined or as defined by the user (see description of FIG. 5).

The controller 150 controls the overall operation of the mobile communication terminal. That is, the controller 150 retrieves various data stored in the memory unit 155 and transfers the data to the display unit 110 or controls the operations of the camera unit 120 and the image processor 125. In addition, the controller 150 extracts a hand-shaped image from the image photographed by the camera unit 120 or compares the extracted image with a hand-shaped database stored in the memory unit 155 to select the user. Can be recognized.

In addition, although the image processor 125 and the controller 150 are configured as separate blocks in FIG. 1, the image processor 125 and the controller 150 may be implemented as integrated chips.

3 is a flowchart illustrating a function selection method using a camera unit in a mobile communication terminal according to an exemplary embodiment of the present invention.

In step S301, the user places his hand at a position where the camera unit 120 can photograph the subject (see Fig. 2).

In this case, the mobile communication terminal 100 should be in a state in which a camera imaging mode is selected to enable imaging of a subject through the camera unit 120. The camera capturing mode may be a general picture capturing mode, a specialized menu function setting mode, or a preview mode (that is, a state in which an external image is displayed through the display unit 110 before pressing the shutter).

Therefore, the user needs to first select the camera imaging mode through the input unit 130. That is, the user may select the camera imaging mode through several operations such as a menu key and a direction key provided in the input unit 130. However, any one of the key buttons (for example, a key button as shown by reference numeral 131 of FIG. 2) included in the input unit 130 may be selected as a separate selection key (hereinafter, referred to as an 'imaging mode selection key') for the camera imaging mode. In this case, the camera imaging mode can be selected more easily without the user having to operate the key button several times.

As described above, when the camera imaging mode is selected, the display unit 110 may display an image before imaging continuously input through the lens of the camera unit 120 on the screen. Through this, the user can check whether the entire hand is located at a position and a focal length that can be accurately captured by the camera unit 120. In addition, through the display of the image before the image captured by the display unit 110, the user matches the image displayed on the screen according to the shape of his or her hand and the preset hand shape data corresponding to the function to be selected. You can check if it is. The preset hand data may be displayed on the display unit 155 in the form of a thumbnail image for the convenience of the user's selection of a menu function.

In step S302, the camera unit 120 picks up the user's hand. That is, when the user selects the imaging through the input unit 130 (for example, the input of the imaging function button or the selection of the imaging function menu), the controller 150 selects a corresponding signal (hereinafter, referred to as 'imaging selection'). Signal ”) to instruct the camera unit 120 to capture the subject. Here, the captured image is stored in the image memory of the memory unit 155. In this case, an image stored in the image memory is called an original image.

At this time, the controller 150 needs to identify whether the imaging selection signal is an imaging selection signal for general image capturing or an imaging selection signal for function selection according to the present invention. As described above, it may be easy to identify each mode by setting different modes in advance. That is, when the imaging of the subject through the camera unit 120 is for general image capturing, not for function selection, it is not necessary to go through steps S303 to S305 below this step. Various methods may be used to identify the image pickup selection signal. For example, a method of distinguishing the image pickup mode for image capturing and the image pickup mode for function selection on a menu displayed through the display unit 110 may be used. Can be. Alternatively, as described above, the controller 150 determines that the imaging mode is to select a function only when the camera imaging mode is selected through an imaging mode selection key provided separately in the input unit 130 rather than selection through an operation such as a menu key. The method may also be used.

In step S303, the controller 150 extracts only the user's hand from the original image photographed in step S302. In order to extract only the user's hand portion, for example, a boundary detection technique described below may be used. Here, an image obtained by extracting only the user's hand from the original image is called an extracted image. Before the extraction of the extracted image through the controller 150, an image processing process (hereinafter, referred to as a preprocessing process) by the image processor 125 may be included. Detailed description thereof will be provided with reference to FIG. 4.

In this case, the obtained extracted image is stored in the image memory of the memory unit 155 or reprocessed into an image having a constant size through the scaler of the image processor 125 under the control of the controller 150. It may be stored in the image memory of the unit 155. However, in the following description, it is assumed that the extracted image is stored in the image memory of the memory unit 155 by the latter method.

In operation S304, the controller 150 checks whether the extracted image matches data of any one of the hand-shaped databases stored in the memory unit 155. For example, a specific program (hereinafter, referred to as a 'shape recognition program') stored in the program memory of the memory unit 155 may be used for the shape matching. That is, the controller 150 loads the shape recognition program stored in the program memory of the memory unit 155, the extracted image stored in the memory unit 155, and the hand database, and then uses the shape recognition program to extract the extracted image and hand. Determine whether they match the shape database. Detailed description thereof will be provided below with reference to FIG. 5.

In this case, if it is determined that the extracted image does not match the hand database, the controller 150 may determine this as an error. In this case, the controller 150 may control the display unit 110 to display an error message such as "an incorrect hand shape or a function that matches the hand shape" is displayed. If it is determined that the extracted image coincides with any one of the data in the hand database, step S305 is performed.

In operation S305, the controller 150 executes a function corresponding to hand data that is matched (recognized) with the extracted image. For example, when the function corresponding to the hand data corresponding to the extracted image is in the message transmission mode, a message input window is displayed on the display unit 110, and in the call mode by speed dial, the call to the corresponding recipient is Can be tried.

 Of course, step S305 may further include a step of confirming whether the function desired to be selected by the user is correctly recognized by the controller 150. That is, before the controller 150 immediately executes the function recognized as being selected, the controller 150 instructs the display unit 110 to display information (message) corresponding to the recognized function, thereby confirming the user. You can do that. For example, if the Internet search mode is recognized by the controller 150, the display 110 displays a message such as "You have selected the Internet search mode. Would you like to connect now?", And the user presses the OK button. After pressing it can be set to attempt an internet connection.

4 is a diagram illustrating a method of obtaining an extracted image from an original image. FIG. 4A illustrates an original image captured by the camera unit 120 through step S302 of FIG. 3, and FIG. 4B illustrates a high frequency filter of the image processor 125 of FIG. 4. The converted video obtained by converting the original video shown in (a) is shown, and Figs. 4C to 4E show extracted images obtained from the converted video.

Of course, unlike the original image illustrated in (a) of FIG. 4, the actual original image may include a subject (eg, a background object, etc.) other than the user's hand. However, the subject other than the hand included in the original image is recognized by the controller 150 while being removed through an image processing process (preprocessing process) to be described later or through a shape matching process through a shape recognition program described below with reference to FIG. 6. It will be readily apparent to one skilled in the art that the present invention will not. Therefore, in the following description, it is assumed that the original image captured through step S302 of FIG. 3 is the same as that of FIG.

The original image is a color image including color information of red (R), green (G), and blue (B) for each pixel (fixel) constituting the original image, as shown in FIG. .

Here, the original image may be converted into a converted image as shown in FIG. 4B through a preprocessing process using a high frequency filter included in the image processor 125. In this case, the high frequency filter may distinguish color differences between adjacent pixels by using color information of each pixel in the original image. Therefore, when the original image passes through the high frequency filter, only the boundary portion representing the color difference of more than a predetermined range between adjacent pixels is prominently displayed in the converted image. In this case, the boundary portion that is prominently displayed according to the color difference between adjacent pixels in the converted image is referred to as color difference information.

For example, in the original image shown in (a) of FIG. 4, the pixels constituting the flesh-colored hands or the pixels constituting the green background each exhibit the same color (or a color difference within a predetermined range). All are displayed in black through the converted image of FIG. 4 (b) while passing through the high frequency filter. On the other hand, the boundary between the hand (skin) and the background (green) is prominently displayed, forming the outline of the hand through the converted image due to the large color difference between adjacent pixels. In addition, according to the degree of color difference between adjacent pixels, the outline of the hand is slightly blurred in comparison with the outline of the hand.

That is, through the above-described preprocessing process, the red (R), green (G), and blue (B) color information of the original image is removed, and only the color difference information corresponding to the shape of the hand (outline and outline) is obtained. It will be included.

4B illustrates a case where a high frequency filter is used in a preprocessing process performed by the image processor 125, but various image filters may be used in addition to the high frequency filter.

The controller 150 may obtain the extracted image as shown in FIG. 4C from the converted image including only the color difference information corresponding to the shape of the hand. For example, the controller 150 extracts color difference information of a predetermined size or more corresponding to an outline forming a hand from the converted image to obtain an extracted image (that is, only an image corresponding to the shape of the hand) from the converted image. Can be. Alternatively, the extracted image may be obtained by extracting only the color difference information forming the closed curve (that is, the closed curve formed by the outline of the hand in this example).

Here, the extracted image may be processed again by the image processor 125 as an image as shown in FIG. 4D (that is, an image in which the contour of the inside of the shape of the hand is removed from the extracted image of FIG. 4C). . This is to efficiently use the memory space of the memory unit 155 necessary for storing the extracted image by removing unnecessary information included in the extracted image (ie, internal contour information of the hand). Of course, in order to effectively use the memory space, the extracted image may be stored in the image memory in the form of an image as shown in (e) of FIG. 4 (that is, an image in which all information except the outline of the hand shape is removed). In the following description, it is assumed that the extracted image is stored in the image memory in the form of the image of FIG.

However, in the above description, since the original image is the same as in FIG. 4A, only the color difference information corresponding to the shape of the hand is displayed through the converted image shown in FIG. 4B, but the converted image is displayed according to the original image. May include color difference information about a subject other than a hand. Therefore, in this case, in addition to the extracted image corresponding to the shape of the hand illustrated in FIGS. 4C to 4E, an extracted image corresponding to another subject may be further obtained. That is, one or more extracted images may be obtained by the controller 150. However, the extracted image obtained for the subject other than the hand may be easily removed through the shape matching process by the controller 150 to be described below with reference to FIG. 6.

In addition, the above-described method of obtaining the extracted image is merely an example, and various image extraction methods may be used in addition to the above. For example, the controller 150 may use a method of obtaining an extracted image by extracting pixels having color information corresponding to the flesh color from the original image.

5 is a table illustrating the shape of a user's hand that can be set corresponding to a function provided in the mobile communication terminal.

In the table of Fig. 5, each hand shape defining a number "1" to a number "10" (or "0") and a letter "OK" is shown. At this time, as can be seen through each of the hand image shown in the table of Figure 5, each hand shape is a number "1" to the number "10" and the letter "OK". However, the hand shape presented by the table of FIG. 5 is just an example, and in addition, various hand shapes may be used. In addition, in the table of FIG. 5, the numbers corresponding to the shapes of the hands are also merely identifiers for identifying individual functions provided in the terminal. For example, when the controller 150 determines (recognizes) the hand shape taken by the user from the extracted image as the hand shape corresponding to the identifier “1” shown in the table of FIG. 5, the function corresponding to the identifier “1” is performed. Will be selected (executed). That is, different functions may correspond to each of the identifiers "1" to "10" and the identifier "OK".

Such an identifier may be previously defined (set) in the terminal, but the user may further define or newly define the identifier. That is, the user changes the corresponding function corresponding to the identifier predefined in the terminal through the input unit 130 according to the frequency of use (selection), or captures the shape of the hand to be further defined through the camera unit 120. You can then set up additional functions for this. By adding or changing the identifier, the user can select a function included in the mobile communication terminal 100 more conveniently and in various ways. At this time, the addition of the identifier is also possible by a combination of the predefined identifier. For example, a user may add a new identifier "12" through a combination of identifiers "1", "2" and "OK" or a combination of identifiers "10", "2" and "OK".

Here, the hand shape corresponding to each identifier is hand image information (for example, a hand outline image, etc.) or data information on the hand image (for example, data about a position vector corresponding to the hand shape). Etc.) and a hand-shaped database, and may be stored in the image memory or data memory of the memory unit 155. In addition, a corresponding function corresponding to each identifier may also be stored in the data memory of the memory unit 155.

6 and 7 illustrate a method of recognizing a hand shape from an extracted image by using a shape recognition program. 6 shows a case in which the user takes the shape of a hand corresponding to the identifier "2", and FIG. 7 shows a case in which the user takes the shape of a hand corresponding to the identifier "6".

FIG. 6A illustrates the extracted image obtained by the controller 150 through step S303 of FIG. 3 when the user takes the shape of a hand corresponding to the identifier “2”.

When the extracted image is obtained as shown in FIG. 6A, the controller 150 first extracts feature point information from the extracted hand image. As the feature point information, as illustrated in FIG. 6B, reference point information and inflection point information may be used. Here, the reference point information refers to information that is a starting point for generating a finger position vector to be described later in the hand-shaped extracted image. The reference point information may be selected at any one point (location) of the extracted image, but it is assumed below that the point illustrated in FIG. 6B is selected as the reference point information. In addition, the inflection point information refers to information on a point where the slope of the curve starts to change more than a predetermined range in the outline (ie, the curve) formed by the hand-shaped extracted image. Therefore, the controller 150 may extract the inflection point information by finding a point in which the slope of the curve changes in the outline formed by the extracted image by more than a predetermined range.

When the reference point information and the inflection point information are extracted, the control unit 150 uses the reference point information as the starting point and the inflection point information as the end point as shown in FIG. 6C (in this example, the position vector of reference numerals 1 to 4). Im). Such a position vector may be temporarily stored in the data memory of the memory unit 155.

In this case, the position vector may include length information of the vector, and the controller 150 selects only position vectors having length information of a predetermined size or more among the position vectors. Through this process, the control unit 150 uses the position vector corresponding to the finger as shown in FIG. 6D (in this example, the position vector of the reference numeral 1 and the reference numeral 4) (hereinafter, referred to as the “finger position vector”). Can be found.

In the case of FIG. 7, the controller 150 may find the finger position vectors corresponding to the reference numeral 1 and the reference numeral 3 by going through the same process as described above (FIGS. 7A to 7D). ) Reference).

Herein, the controller 150 may recognize an identifier corresponding to the shape of the hand taken by the user in consideration of the number of finger position vectors and the angle θ between the finger position vectors. For example, in FIG. 6D, the number of finger position vectors is two, and the angle between the finger position vectors is θ ₁ . In the case of FIG. 7D, the number of finger position vectors is two, and the angle between the finger position vectors is θ ₂ . That is, in the case of FIGS. 6D and 7D, the number of finger position vectors is the same, but the angles between the finger position vectors are different from θ ₁ and θ ₂ . In this case, when the angle θ between the finger position vectors is equal to or greater than a predetermined size, the controller 150 may recognize that a thumb (ie, a finger shape corresponding to the identifier “5”) is included. Here, the angle θ of a predetermined size may be based on a maximum angle (hereinafter, referred to as a “reference angle”) that can be formed between the fingers when the fingers other than the thumb are opened as far as possible. That is, assuming that the fingers are open, the angle between the thumb and index finger is formed larger than the reference angle that can be formed between the other fingers. Therefore, when the angle between the finger position vectors is greater than or equal to the reference angle, it may be determined that any one of the finger position vectors corresponds to the thumb.

That is, since the angle θ ₁ between the finger position vectors of FIG. 6D is smaller than the reference angle, the controller 150 determines that a finger position vector corresponding to the thumb does not exist among the finger position vectors. (d) may be recognized as the identifier "2" corresponding to the number (ie, two) of the finger position vectors. However, in the case of FIG. 7D, since the angle θ ₂ between the finger position vectors is larger than the reference angle, the controller 150 may determine that a finger position vector corresponding to the thumb exists among the finger position vectors. Therefore, in FIG. 7D, the controller 150 may recognize the number of two finger position vectors as the identifier “6” by adding the identifier “5” corresponding to the thumb and the other finger.

Using the shape recognition program described above, the controller 150 may recognize a hand shape taken by the user from the extracted image, and select a function corresponding thereto.

In the above, the case of the identifier "2" and the identifier "6" has been described as an example, but those skilled in the art will readily appreciate that other identifiers may be distinguished and recognized by the above-described method. In addition, the shape recognition program described above is only one example of various image recognition methods, and the above-described shape recognition program may further include various other determination (recognition) methods and processes for more accurate shape recognition. .

As described above, according to the mobile communication terminal capable of selecting a function using a camera and a method of selecting the same according to the present invention, there is an effect that a user can easily and quickly select a function provided in the mobile communication terminal.

In addition, the present invention has the effect of maximizing component utilization by allowing the camera to be used universally.

In addition, the present invention has the effect that the user can be interested in using the terminal from the existing monotonous function selection method through the key button when selecting the function in the mobile communication terminal.

Although the above has been described with reference to a preferred embodiment of the present invention, those skilled in the art to which the present invention pertains without departing from the spirit and scope of the present invention as set forth in the claims below It will be appreciated that modifications and variations can be made.

Claims (4)

A mobile communication terminal provided with an imaging function, A memory unit for storing hand shape information corresponding to each function selectable from the mobile communication terminal; A camera unit generating and outputting image data photographing a user's hand; And When the image data output from the camera unit is compared with the hand information stored in the memory unit, and it is determined that there is hand information corresponding to the image data, a function corresponding to the matched hand information is performed. Includes a control to recognize, And the hand information is position vector information corresponding to the position of the finger. The method of claim 1, And an image processor which removes an image other than the user's hand from the image data output by the camera unit. A mobile communication terminal provided with an imaging function, (a) generating image data of the user's hand through the camera unit; determining whether the image data matches the shape information of the hand stored in the memory unit; And (c) selecting a function corresponding to the hand information that matches the image data; And the hand information is position vector information corresponding to the position of the finger. The method of claim 3, Prior to step (b) above And extracting only a hand portion of a user from the image data.

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