KR20110042805A - A method of filtering and a apparatus of capturing picture with filtering function - Google Patents

Abstract

PURPOSE: A filtering method and photographing device having a filtering function are provided to filter an area except a selected area by a user or a selected area by a user. CONSTITUTION: A preview image of a sensed subject is displayed on a touch screen(S710). The selected area is received by a user form the preview image(S720). By using the selected area by a user from the preview image, a filter function is applied(S730). A coordinate information is extracted from the selected area by a user(S740). The step of applying the filter function used the coordinate information(S750).

Description

TECHNICAL APPARATUS WITH A FILTERING METHOD AND FILTERING FUNCTION

The present invention relates to an image pickup apparatus having a filtering method and a filtering function. In particular, the present invention relates to a filtering method for filtering an area except an area selected by a user or an area selected by a user, and an image pickup device having a filtering function.

As an imaging device, a camera can be considered first. With the development of technology, the spread of digital cameras from analog cameras is spreading. Meanwhile, a mobile communication terminal having a function of storing a photographed image by mounting a camera has been developed. In recent years, most mobile communication terminals are equipped with a camera.

Terminals such as personal computers, laptops, mobile phones, etc. may be configured to perform various functions. Examples of such various functions include data and voice communication functions, taking pictures or videos through a camera, storing voices, playing music files through a speaker system, and displaying images or videos. Some terminals include additional functionality to play games, while others are implemented as multimedia devices. Moreover, recent terminals can receive a broadcast or multicast signal to watch a video or television program.

In general, a terminal may be divided into a mobile terminal and a stationary terminal according to whether or not it is mobile, and again, the mobile terminal may be a portable terminal (or handheld terminal) according to whether the user can directly carry it. And it may be divided into a vehicle mount terminal (vehicle mount terminal).

1 is a view showing an image to which the filtering according to the prior art is applied. As shown in FIG. 1, according to the related art, the filtering function of the imaging apparatus is a function of giving a single tone to an entire image such as sepia, negative, and black and white.

As described above, according to the related art, the filtering function of the imaging device is a function of giving a single tone to the entire image such as sepia, negative, and black and white.

An object of the present invention is to provide an image pickup apparatus having a filtering method and a filtering function capable of filtering only a specific region of an image of the image pickup apparatus.

Technical problems to be achieved in the present invention are not limited to the above-mentioned technical problems, and other technical problems not mentioned above will be clearly understood by those skilled in the art from the following description. Could be.

In order to achieve the above object, the filtering method according to an aspect of the present invention displays a preview image of a detected subject on a touch screen, receives an area selected by the user from the preview image, and provides the user with the preview image. Apply the filter function using the area selected by.

In this case, coordinate information may be extracted from an area selected by the user, and a filter function may be applied to the preview image by using the coordinate information.

In addition, a filter function may be applied to a region other than the selected region or the selected region in the preview image.

In addition, a specific color in the selected area may be input, and a filter function may be applied except for the specific color in the selected area.

In addition, if the selected area is around the face, an original area may be automatically formed.

In addition, the selected area may be an irregular area selected by the user by drawing an outline.

In order to achieve the above object, the image pickup apparatus according to an aspect of the present invention displays a preview image of a detected subject, the display unit for receiving an area selected by the user in the preview image and the preview image by the user It may include an image signal processor (hereinafter referred to as "ISP") to apply a filter function using the selected area.

In this case, the imaging apparatus may further include a main system apparatus for extracting coordinate information from the selected area.

In addition, the ISP may apply a filter function to an area except the selected area or the selected area in the preview image according to a user's selection.

In addition, the display unit may receive a specific color in the selected area, and the ISP may apply a filter function except the specific color in the selected area.

According to an embodiment of the present invention, only a specific region of the preview image may be filtered by applying a filter function to the preview image by extracting coordinate information by receiving a specific region of the preview image from a user.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned above may be clearly understood by those skilled in the art from the following description. will be.

The present invention relates to a filtering method for filtering an area except an area selected by a user or an area selected by a user, and an image pickup device having a filtering function. Therefore, the present invention can be applied to a portable terminal (digital camera, mobile communication terminal, etc.) having a camera function. Therefore, hereinafter, an embodiment to which the present invention is applied to a mobile communication terminal and a digital camera will be described.

Hereinafter, a mobile terminal related to the present invention will be described in more detail with reference to the accompanying drawings. The suffixes "module" and "unit" for components used in the following description are given or used in consideration of ease of specification, and do not have distinct meanings or roles from each other.

The mobile terminal described herein may include a mobile phone, a smart phone, a laptop computer, a digital broadcasting terminal, a personal digital assistant (PDA), a portable multimedia player (PMP), navigation, and the like.

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

The mobile terminal 100 includes a wireless communication unit 110, an A / V input unit 120, a user input unit 130, a sensing unit 140, an output unit 150, a memory 160, and an interface. The unit 170, the controller 180, and the power supply unit 190 may be included. The components shown in FIG. 2 are not essential, so that a mobile terminal having more or fewer components may be implemented.

Hereinafter, the components will be described in order.

The wireless communication unit 110 may include one or more modules that enable wireless communication between the mobile terminal 100 and the wireless communication system or between the mobile terminal 100 and a network in which the mobile terminal 100 is located. For example, the wireless communication unit 110 may include a broadcast receiving module 111, a mobile communication module 112, a wireless Internet module 113, a short range communication module 114, and a location information module 115 .

The broadcast receiving module 111 receives a broadcast signal and / or broadcast related information from an external broadcast management server through a broadcast channel.

The broadcast channel may include a satellite channel and a terrestrial channel. The broadcast management server may mean a server that generates and transmits a broadcast signal and / or broadcast related information or a server that receives a previously generated broadcast signal and / or broadcast related information and transmits the same to a terminal. The broadcast signal may include not only a TV broadcast signal, a radio broadcast signal, and a data broadcast signal, but also a broadcast signal having a data broadcast signal combined with a TV broadcast signal or a radio broadcast signal.

The broadcast related information may mean information related to a broadcast channel, a broadcast program, or a broadcast service provider. The broadcast related information may also be provided through a mobile communication network. In this case, it may be received by the mobile communication module 112.

The broadcast related information may exist in various forms. For example, it may exist in the form of Electronic Program Guide (EPG) of Digital Multimedia Broadcasting (DMB) or Electronic Service Guide (ESG) of Digital Video Broadcast-Handheld (DVB-H).

The broadcast receiving module 111 may include, for example, Digital Multimedia Broadcasting-Terrestrial (DMB-T), Digital Multimedia Broadcasting-Satellite (DMB-S), Media Forward Link Only (MediaFLO), and Digital Video Broadcast (DVB-H). Digital broadcast signals can be received using digital broadcasting systems such as Handheld and Integrated Services Digital Broadcast-Terrestrial (ISDB-T). Of course, the broadcast reception module 111 may be configured to be suitable for not only the above-described digital broadcast system but also other broadcast systems.

The broadcast signal and / or broadcast related information received through the broadcast receiving module 111 may be stored in the memory 160.

The mobile communication module 112 transmits and receives a wireless signal with at least one of a base station, an external terminal, and a server on a mobile communication network. The wireless signal may include various types of data according to transmission and reception of a voice call signal, a video call call signal, or a text / multimedia message.

The wireless internet module 113 refers to a module for wireless internet access and may be embedded or external to the mobile terminal 100. Wireless Internet technologies may include Wireless LAN (Wi-Fi), Wireless Broadband (Wibro), World Interoperability for Microwave Access (Wimax), High Speed Downlink Packet Access (HSDPA), and the like.

The short range communication module 114 refers to a module for short range communication. As a short range communication technology, Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra Wideband (UWB), ZigBee, and the like may be used.

The location information module 115 is a module for obtaining a location of a mobile terminal, and a representative example thereof is a GPS (Global Position System) module.

Referring to FIG. 2, the A / V input unit 120 is for inputting an audio signal or a video signal, and may include a camera 121 and a microphone 122. The camera 121 processes image frames such as still images or moving images obtained by the image sensor in the video call mode or the photographing mode. The processed image frame may be displayed on the display unit 151.

The image frame processed by the camera 121 may be stored in the memory 160 or transmitted to the outside through the wireless communication unit 110. Two or more cameras 121 may be provided according to the use environment.

The microphone 122 receives an external sound signal by a microphone in a call mode, a recording mode, a voice recognition mode, etc., and processes the external sound signal into electrical voice data. The processed voice data may be converted into a form transmittable to the mobile communication base station through the mobile communication module 112 and output in the call mode. The microphone 122 may implement various noise removing algorithms for removing noise generated in the process of receiving an external sound signal.

The user input unit 130 generates input data for the user to control the operation of the terminal. The user input unit 130 may include a key pad dome switch, a touch pad (static pressure / capacitance), a jog wheel, a jog switch, and the like.

The sensing unit 140 detects a current state of the mobile terminal 100 such as an open / closed state of the mobile terminal 100, a location of the mobile terminal 100, presence or absence of a user contact, orientation of the mobile terminal, acceleration / deceleration of the mobile terminal, and the like. To generate a sensing signal for controlling the operation of the mobile terminal 100. For example, when the mobile terminal 100 is in the form of a slide phone, it may sense whether the slide phone is opened or closed. In addition, whether the power supply unit 190 is supplied with power, whether the interface unit 170 is coupled to the external device may be sensed. The sensing unit 140 may include a proximity sensor 141.

The output unit 150 is used to generate output related to visual, auditory, or tactile senses, which includes a display unit 151, an audio output module 152, an alarm unit 153, a haptic module 154, and a projector module. 155, and the like.

The projector module 155 is a component for performing an image project function using the mobile terminal 100. The whole or part of an image displayed on the display unit 151 according to a control signal of the controller 180. Can be enlarged and displayed on an external screen.

The projector module 155 may be displayed on a light source (not shown) for generating light for outputting an image to the outside, display means (not shown) for displaying an image according to the light generated by the light source, and on the display means. It may include a lens (not shown) to enlarge the image to the outside at a predetermined focal length. The light source can generate laser light. The image output through the lens can be displayed enlarged on the external screen.

The projector module 155 may be divided into a cathode ray tube (CRT) module, a liquid crystal display (LCD) module, or a digital light processing (DLP) module according to the device type of the display means. In particular, the DLP module may be advantageous in miniaturization of the projector module 155 by using a fragmentary structure in which a light generated from a light source is filtered to reflect the image displayed on a digital micromirror device (DMD) chip and to enlarge and project the light. have.

The projector module 155 may be provided in the longitudinal direction on the side, front, or back of the mobile terminal 100. Of course, the projector module 155 may be provided at any position of the mobile terminal 100 as necessary.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, when the mobile terminal is in a call mode, the mobile terminal displays a user interface (UI) or a graphic user interface (GUI) related to the call. When the mobile terminal 100 is in a video call mode or a photographing mode, the mobile terminal 100 displays photographed and / or received images, a UI, and a GUI.

The display unit 151 includes a liquid crystal display (LCD), a thin film transistor-liquid crystal display (TFT LCD), an organic light-emitting diode (OLED), and a flexible display (flexible). and at least one of a 3D display.

Some of these displays can be configured to be transparent or light transmissive so that they can be seen from the outside. This may be referred to as a transparent display. A representative example of the transparent display is TOLED (Transparant OLED). The rear structure of the display unit 151 may also be configured as a light transmissive structure. By this structure, the user can see the object located behind the terminal body through the area occupied by the display unit 151 of the terminal body.

There may be two or more display units 151 according to the implementation form of the mobile terminal 100. For example, in the mobile terminal 100, a plurality of display portions may be spaced apart from one another, or may be disposed integrally with one another, and may be disposed on different surfaces, respectively.

When the display unit 151 and a sensor for detecting a touch operation (hereinafter, referred to as a touch sensor) form a mutual layer structure (hereinafter referred to as a touch screen), the display unit 151 may be configured in addition to an output device. Can also be used as an input device. The touch sensor may have, for example, a form of a touch film, a touch sheet, a touch pad, or the like.

The touch sensor may be configured to convert a change in pressure applied to a specific portion of the display unit 151 or capacitance generated in a specific portion of the display unit 151 into an electrical input signal. The touch sensor may be configured to detect not only the position and area of the touch but also the pressure at the touch.

If there is a touch input to the touch sensor, the corresponding signal (s) is sent to the touch controller. The touch controller processes the signal (s) and then transmits the corresponding data to the controller 180. As a result, the controller 180 can know which area of the display unit 151 is touched.

Referring to FIG. 2, a proximity sensor 141 may be disposed in an inner region of the mobile terminal surrounded by the touch screen or near the touch screen. The proximity sensor refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or an object present in the vicinity without using a mechanical contact by using an electromagnetic force or infrared rays. Proximity sensors have a longer life and higher utilization than touch sensors.

Examples of the proximity sensor include a transmission photoelectric sensor, a direct reflection photoelectric sensor, a mirror reflection photoelectric sensor, a high frequency oscillation proximity sensor, a capacitive proximity sensor, a magnetic proximity sensor, and an infrared proximity sensor. When the touch screen is capacitive, the touch screen is configured to detect the proximity of the pointer by the change of the electric field according to the proximity of the pointer. In this case, the touch screen (touch sensor) may be classified as a proximity sensor.

Hereinafter, for convenience of explanation, the act of allowing the pointer to be recognized without being in contact with the touch screen so that the pointer is located on the touch screen is referred to as a "proximity touch", and the touch The act of actually touching the pointer on the screen is called "contact touch." The position where the proximity touch is performed by the pointer on the touch screen refers to a position where the pointer is perpendicular to the touch screen when the pointer is in proximity proximity.

The proximity sensor detects a proximity touch and a proximity touch pattern (for example, a proximity touch distance, a proximity touch direction, a proximity touch speed, a proximity touch time, a proximity touch position, and a proximity touch movement state). Information corresponding to the sensed proximity touch operation and proximity touch pattern may be output on the touch screen.

The sound output module 152 may output audio data received from the wireless communication unit 110 or stored in the memory 160 in a call signal reception, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. The sound output module 152 may also output a sound signal related to a function (eg, a call signal reception sound, a message reception sound, etc.) performed in the mobile terminal 100. The sound output module 152 may include a receiver, a speaker, a buzzer, and the like.

The alarm unit 153 outputs a signal for notifying occurrence of an event of the mobile terminal 100. Examples of events occurring in the mobile terminal include call signal reception, message reception, key signal input, and touch input. The alarm unit 153 may output a signal for notifying occurrence of an event in a form other than a video signal or an audio signal, for example, vibration. The video signal or the audio signal may be output through the display unit 151 or the audio output module 152, so that they 151 and 152 may be classified as part of the alarm unit 153.

The haptic module 154 generates various tactile effects that the user can feel. Vibration is a representative example of the haptic effect generated by the haptic module 154. The intensity and pattern of vibration generated by the haptic module 154 can be controlled. For example, different vibrations may be synthesized and output or may be sequentially output. In addition to vibration, the haptic module 154 may be configured to provide a pin array that vertically moves with respect to the contact skin surface, a jetting force or suction force of air through the jetting or suction port, grazing to the skin surface, contact of the electrode, electrostatic force, and the like. Various tactile effects can be generated, such as effects by the endothermic and the reproduction of a sense of cold using the elements capable of endotherm or heat generation.

The haptic module 154 may not only deliver the haptic effect through direct contact, but also may implement the user to feel the haptic effect through a muscle sense such as a finger or an arm. The haptic module 154 may be provided with two or more according to the configuration aspect of the mobile terminal 100.

The memory 160 may store a program for the operation of the controller 180 and may temporarily store input / output data (for example, a phone book, a message, a still image, a video, etc.). The memory 160 may store data regarding vibration and sound of various patterns output when a touch input on the touch screen is performed.

The memory 160 may be a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), RAM (Random Access Memory, RAM), Static Random Access Memory (SRAM), Read-Only Memory (ROM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Programmable Read-Only Memory (PROM), Magnetic Memory, Magnetic It may include a storage medium of at least one type of disk, optical disk. The mobile terminal 100 may operate in connection with a web storage that performs a storage function of the memory 160 on the Internet.

The interface unit 170 serves as a path with all external devices connected to the mobile terminal 100. The interface unit 170 receives data from an external device, receives power, transfers the power to each component inside the mobile terminal 100, or transmits data inside the mobile terminal 100 to an external device. For example, wired / wireless headset ports, external charger ports, wired / wireless data ports, memory card ports, ports for connecting devices with identification modules, audio input / output (I / O) ports, The video input / output (I / O) port, the earphone port, and the like may be included in the interface unit 170.

The identification module is a chip that stores various types of information for authenticating the usage rights of the mobile terminal 100, and includes a user identification module (UIM), a subscriber identify module (SIM), and a universal user authentication module ( Universal Subscriber Identity Module (USIM), and the like. Devices with identification modules (hereinafter referred to as "identification devices") can be manufactured in a smart card format. Accordingly, the identification device can be connected to the terminal 100 through the port.

The interface unit may be a passage through which power from the cradle is supplied to the mobile terminal 100 when the mobile terminal 100 is connected to an external cradle, or various command signals input from the cradle by a user may be transferred. It may be a passage that is delivered to the terminal. Various command signals or power input from the cradle may be operated as signals for recognizing that the mobile terminal is correctly mounted on the cradle.

The controller 180 typically controls the overall operation of the mobile terminal. For example, perform related control and processing for voice calls, data communications, video calls, and the like. The controller 180 may include a multimedia module 181 for playing multimedia. The multimedia module 181 may be implemented in the controller 180 or may be implemented separately from the controller 180.

The controller 180 may perform a pattern recognition process for recognizing a writing input or a drawing input performed on the touch screen as text and an image, respectively. The controller may filter an area excluding an area selected by the user or an area selected by the user.

The power supply unit 190 receives an external power source and an internal power source under the control of the controller 180 to supply power for operation of each component.

Various embodiments described herein may be implemented in a recording medium readable by a computer or similar device using, for example, software, hardware or a combination thereof.

According to a hardware implementation, the embodiments described herein include application specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), and the like. It may be implemented using at least one of processors, controllers, micro-controllers, microprocessors, and electrical units for performing other functions.

In some cases, the embodiments described herein may be implemented by the controller 180 itself.

According to the software implementation, embodiments such as the procedures and functions described herein may be implemented as separate software modules. Each of the software modules may perform one or more functions and operations described herein.

Software code may be implemented in software applications written in appropriate programming languages. The software code may be stored in the memory 160 and executed by the controller 180.

Next, an image capturing apparatus having a filtering function according to an embodiment of the present invention will be described with reference to FIG. 3. 3 is a view showing an image pickup device having a filtering function according to an embodiment of the present invention.

As shown in FIG. 3, an imaging device having a filtering function according to an exemplary embodiment of the present invention includes a camera sensor 610, an input unit 620, a main system device 630, an image signal processor, and an image signal processor. "ISP" 640, a digital signal processor (hereinafter referred to as "DSP") 650, and a display unit 660.

The camera sensor 610 receives an image of a subject. When the image of the subject is input through the camera sensor 610, the image capturing apparatus displays the image before the filtering function is applied to the display unit 660.

The input unit 620 receives data from a user. The input unit 620 may include a keypad, a dome switch, a touch pad, and the like. If the display unit 660 is a touch screen type, the display unit 660 may perform both an output unit and an input unit. The display unit 660 of the image capturing apparatus according to the embodiment of the present invention is a touch screen type. Accordingly, the input unit 620 may include a touch screen input unit and other types of input unit together.

The input unit in the form of a touch screen receives an area selected by the user. The user can select a specific area of the image displayed on the touch screen by dragging a specific area of the image displayed on the touch screen, drawing an outline of the specific area using a touch pen, or coloring a specific area. have. In addition, a specific area may be selected by dragging a fixed pattern such as a square, a star, and a heart. And a plurality of areas can be selected. Then, after setting the face detection function and selecting a face periphery, the imaging apparatus may automatically form a circle around the face.

The input unit 620 may receive a color to which the filter is to be applied or a color to which the filter is not applied in the selected area from the user. That is, the user may touch and select a color to which the filter is to be applied or a color to which the filter is to be excluded from the selected area of the image displayed on the touch screen.

The input unit 620 may receive input from the user to apply the filter to the selected area or to apply the filter to an area other than the selected area.

The input unit 620 may receive a filter function from the user. Filter features include sepia, negative and black and white.

The input unit 620 transfers data input by the user to the main system device 630. The data input by the user may be an area, a color, and a filter function selected by the user.

The main system device 630 extracts coordinate information from an area selected by the user received from the input unit 620. When the area selected by the user is irregular, such as when the user selects a specific area by using a touch pen or selects a specific area by coloring a specific area, the outline of the selected area is configured. Coordinate array information of pixels to be extracted.

The main system device 630 transfers the extracted coordinate information and other data input by the user to the ISP 640.

The ISP 640 applies a filter to the image received from the camera sensor 610 using the coordinate information and the user data received from the main system device 630. The filtered image is transmitted to the DSP 650. The image transmitted by the ISP 640 to the DSP 650 is YCbRr data.

The DSP 650 converts the YCbRr data received from the ISP 640 into RGB data and transmits the converted RGB data to the display unit 660.

The display unit 660 displays an image. The display unit 660 displays an image sensed by the camera sensor 610 before the filtering function is selected by the user, and displays the filtered image when the filtering function is selected by the user.

Next, a filtering method according to an embodiment of the present invention will be described with reference to FIGS. 4 to 14.

4 is a flowchart illustrating a filtering method according to an embodiment of the present invention.

When the image of the subject is input through the lens, the image capturing apparatus displays the preview image (S710).

In operation S720, data regarding a filtering function is received from the user. The data on the filtering function can be selected in the area selected by the user, the filter function, the color to which the filter is to be applied within the selected area, or the color to be excluded from the filter application, the filter to be applied to the selected area or the selected area. May be applied or not.

The image pickup apparatus may receive a color from which a user wants to apply a filter or a color to exclude filter application within a selected area. That is, the user may touch and select a color to which the filter is to be applied or a color to which the filter is to be excluded from the selected area of the image displayed on the touch screen.

The imaging apparatus may receive an input from the user as to whether to apply the filter to the selected area or to apply the filter to an area other than the selected area.

The imaging apparatus may receive a filter function from the user. Filter features include sepia, negative and black and white.

The area selected by the user may be an area where the user wants to apply the filtering function or an area where the user does not want to apply the filtering function. The imaging device receives an area selected by the user from the preview image displayed on the touch screen.

The user can select a specific area of the image displayed on the touch screen by dragging a specific area of the image displayed on the touch screen, drawing an outline of the specific area using a touch pen, or coloring a specific area. have. In addition, a specific area may be selected by dragging a fixed pattern such as a square, a star, and a heart. And a plurality of areas can be selected. Then, after setting the face detection function and selecting a face periphery, the imaging apparatus may automatically form a circle around the face.

A case in which the user selects a specific area by dragging a specific area of the image displayed on the touch screen will be described with reference to FIG. 5. FIG. 5 illustrates a case in which a user selects a specific area by dragging a specific area of an image displayed on the touch screen.

As shown in FIG. 5, the user drags and selects an area of the image displayed on the touch screen to which the filtering function is not to be applied. In addition, in the selected area, touch and select a color to exclude filter application. In Figure 5 the user selects red.

The imaging device then applies the filtering function except for the red color in the area selected by the user. 5 shows a case where the black and white function is applied. Which filter function to apply may be determined by user input.

A case in which a user selects a specific region by drawing an outline of a specific region of an image displayed on the touch screen using a touch pen will be described with reference to FIG. 6. FIG. 6 is a diagram illustrating a case where a user selects a specific area by drawing an outline of a specific area of an image displayed on a touch screen using a touch pen.

As illustrated in FIG. 6, the user draws and selects an area of the image displayed on the touch screen to which the filtering function is not to be applied. If no specific color is selected, the image pickup apparatus applies the filtering function except for the area selected by the user. That is, the filtering function is applied to all colors of the area selected by the user. 6 shows a case where the black and white function is applied. Which filter function to apply may be determined by user input.

A case in which the user selects a specific area by coloring a specific area of the image displayed on the touch screen will be described with reference to FIG. 7. FIG. 7 is a diagram illustrating a case where a user selects a specific region by coloring a specific region of an image displayed on the touch screen.

As illustrated in FIG. 7, the user selects by coloring an area of the image displayed on the touch screen to which the filtering function is not to be applied. If no specific color is selected, the image pickup apparatus applies the filtering function except for the area selected by the user. That is, the filtering function is applied to all colors of the area selected by the user. 7 shows a case where the black and white function is applied. Which filter function to apply may be determined by user input.

A case in which a user selects a specific area by dragging a specific area of an image displayed on the touch screen with a fixed pattern such as a square, a star, and a heart will be described with reference to FIG. 8. FIG. 8 is a diagram illustrating a case where a user selects a specific area by dragging a specific area of an image displayed on the touch screen to a fixed pattern such as a square, a star, and a heart.

The left side of FIG. 8 shows a case of selecting a specific region by a square pattern, and the right side of FIG. 8 shows a case of selecting a specific region by a heart pattern. As shown in the left side of FIG. 8, a plurality of regions may be selected.

As shown in FIG. 8, the user drags and selects an area of the image displayed on the touch screen, to which the filtering function is not applied, by a fixed pattern such as a square, a star, and a heart. If the specific color is not selected, the image pickup apparatus applies the filtering function except for the area selected by the user.

A case in which the imaging device automatically forms a circle around the face when the user selects the face detection after setting the face detection function will be described with reference to FIG. 9. FIG. 9 is a diagram illustrating a case in which the imaging apparatus automatically forms a circle around the face when the user selects the face detection after setting the face detection function.

As shown in FIG. 9, when the user sets a face detection function and selects a face periphery, the imaging apparatus automatically forms a circle around the face, and then selects an area except the circle around the face. Apply filtering.

The imaging apparatus extracts coordinate information from the area selected by the user (S730). If the area selected by the user is indefinite, the coordinate array information of the pixels constituting the outline of the selected area is extracted.

The imaging apparatus applies a filter function to the preview image using the coordinate information and the user data (S740). The imaging apparatus determines whether to apply a filter function to each pixel of the preview image by using the received coordinate information.

If the user inputs to apply the filter function to the selected area, the user applies the filter function to the area selected by the user. If the user inputs to apply the filter function to the area except the selected area, the area selected by the user is selected. Filter function is applied to all areas except. When the user selects a specific color from the selected areas, the filter function is applied to the selected area except for the specific color. The filter function selected by the user is applied.

The imaging apparatus displays the filtered image (S750).

The filtered image may be displayed in a preview state, a preview after shooting, or a stored state. In addition, only the filtered screen may be stored during storage, or both the basic screen and the filtered screen may be stored.

In the exemplary embodiment of the present invention, the case where the filter function is applied by receiving an area selected by the user has been described. However, the image pickup device may analyze the image itself and automatically recognize the object or the foreground to apply the filter function to the image. .

In the case of recognizing an object and applying a filter function, it is possible to detect a moving object and apply a filter function only to the object or to apply a filter function to an area except the object. The imaging apparatus may extract a motion vector between frames from the preview image to separate a moving object, and apply a filter function to the object.

An object detection algorithm will be described with reference to FIG. 10. 10 is a diagram illustrating an object detection algorithm.

As shown in FIG. 10, an object is recognized by dividing an image into small rectangular shapes (24x24) into simple rectangular features consisting of 2 to 4 squares. The value of each feature is expressed as the difference between the pixel sum of the white area and the pixel sum of the black area. Object detection may be possible even with a Y value excluding color information. Calculate the Intensity Ratio in each area and determine which feature is close to. If the area size is 24x24, the number of feature sets to be compared is tens of thousands. In order to optimize this calculation, an integrated image method is used.

In the case of applying the filter function to the image by recognizing the foreground, it is possible to separate the foreground and background of the image and apply the filter function only to the foreground or the background. Two cameras can be used to separate the foreground and background, or to extract distance information from the image and separate the foreground and background.

11A is a diagram illustrating a method of separating a foreground and a background using calculations. As shown in FIG. 11A, with the concentration value and time of each pixel, a background and a foreground are distinguished using a prediction algorithm of a moving object. It is up to the algorithm implementation to determine the level of movement in the background.

11B is a diagram illustrating a method of separating a foreground and a background using two cameras. As shown in FIG. 11B, a distance (displacement) is measured in a stereo image photographed by two cameras. It works in the same way as the two eyes, so you can calculate distance information. After calculating the displacement of the entire image and creating a displacement histogram, the foreground and the background can be divided.

Further, according to an embodiment of the present invention, the above-described method can be implemented as a code that can be read by a processor on a medium on which the program is recorded. Examples of processor-readable media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like, and may be implemented in the form of a carrier wave (for example, transmission over the Internet). Include.

The image pickup device having the filtering method and the filtering function described as above may not be limitedly applied to the configuration and method of the above-described embodiments, but the embodiments may be modified in whole or in various embodiments so that various modifications may be made. Some may be optionally combined.

1 is a view showing an image to which the filtering according to the prior art is applied.

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

3 is a view showing an image pickup device having a filtering function according to an embodiment of the present invention.

4 is a flowchart illustrating a filtering method according to an embodiment of the present invention.

FIG. 5 illustrates a case in which a user selects a specific area by dragging a specific area of an image displayed on the touch screen.

FIG. 6 is a diagram illustrating a case where a user selects a specific area by drawing an outline of a specific area of an image displayed on a touch screen using a touch pen.

FIG. 7 is a diagram illustrating a case where a user selects a specific region by coloring a specific region of an image displayed on the touch screen.

FIG. 8 is a diagram illustrating a case where a user selects a specific area by dragging a specific area of an image displayed on the touch screen to a fixed pattern such as a square, a star, and a heart.

FIG. 9 is a diagram illustrating a case in which the imaging apparatus automatically forms a circle around the face when the user selects the face detection after setting the face detection function.

10 is a diagram illustrating an object detection algorithm.

11A is a diagram illustrating a method of separating a foreground and a background using calculations.

11B is a diagram illustrating a method of separating a foreground and a background using two cameras.

Claims (11)

Displaying a preview image of the detected subject on a touch screen; Receiving an area selected by a user in the preview image; And And applying a filter function to the preview image by using the area selected by the user. The method of claim 1, Extracting coordinate information from the area selected by the user; The applying of the filter function may include using the coordinate information. The method of claim 1, The applying of the filter function may include applying a filter function to an area except the selected area in the preview image. The method of claim 1, The applying of the filter function may include applying a filter function to the selected area in the preview image. The method of claim 1, Receiving a specific color in the selected area; The applying of the filter function may include applying a filter function except for the specific color in the selected area. The method of claim 1, And receiving the selected area comprises automatically forming an original area when the selected area is around the face. The method of claim 1, And the selected area is an irregular area selected by the user by drawing an outline. A display unit which displays a preview image of the detected subject and receives an area selected by the user from the preview image; And And an image signal processor (hereinafter, referred to as "ISP") to apply a filter function to the preview image by using the area selected by the user. The method of claim 8, And a main system device for extracting coordinate information from the selected area. The method of claim 8, And the ISP applies a filter function to an area other than the selected area or the selected area in the preview image according to a user's selection. The method of claim 1, The display unit receives a specific color in the selected area, And the ISP applies a filter function to remove the specific color within the selected area.

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