WO2021040075A1

WO2021040075A1 - Image display apparatus and image processing method thereof

Info

Publication number: WO2021040075A1
Application number: PCT/KR2019/010941
Authority: WO
Inventors: 서재교
Original assignee: 엘지전자 주식회사
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2021-03-04

Abstract

The present invention relates to an image display apparatus and an image processing method thereof. An image display apparatus and an image processing method thereof according to an embodiment of the present invention are provided, and the image display apparatus comprises: a foreground detection unit for detecting a foreground; a foreground detection unit for augmenting a three-dimensional effect of an image of a foreground region; and a background processing unit for lowering a brightness level of a background image. Accordingly, the three-dimensional effect in the entire image can be further enhanced, while reducing power consumption, by processing an image of a foreground region such that the three-dimensional effect thereof is augmented and by reducing brightness of an image of a background region.

Description

Image display device and image processing method thereof

The present invention relates to an image display device and an image processing method thereof, and more particularly, to an image display device for enhancing a three-dimensional effect and an image processing method thereof.

In the field of image quality processing, there have been attempts to improve image quality such as a three-dimensional effect by detecting a person's face in a video and processing it separately. However, since the human face does not occupy a high proportion of the image and expresses a three-dimensional effect only on the face, the three-dimensional effect is not so great on the entire screen.

On the other hand, in relation to power consumption reduction, a technique of adjusting brightness through a dynamic contrast function is known. However, since the dynamic contrast function controls the level of the entire image, there is a problem that the contrast ratio decreases in a still scene. In addition, when the entire image is darkened to protect the user's eyesight, there is a problem in that the fatigue of the eyesight cannot be protected in the still image.

The problem to be solved by the present invention is to provide an image display device and a control method thereof for increasing image quality by enhancing a three-dimensional effect in an image.

The problem to be solved by the present invention is to reduce power consumption while increasing image quality.

An object to be solved by the present invention is to provide an image display device capable of protecting both eyesight and fatigue of a user while reducing power consumption and a control method thereof.

In order to solve the above-described problems, an image display device and an image processing method thereof according to an embodiment of the present invention include a foreground detection unit that detects a foreground, a foreground detection unit that enhances a three-dimensional effect of an image in the foreground region, and a background image. By providing a background processing unit for reducing the luminance level, it is possible to further enhance the effect of enhancing a three-dimensional effect in the entire image.

In order to solve the above-described problems, the image display device and the image processing method thereof according to an embodiment of the present invention perform dynamic contrast adjustment of varying the contrast level according to the luminance level for the image in the background area, but to adjust the overall gain. To decrease the luminance level.

In order to solve the above-described problems, an image display device and an image processing method thereof according to an embodiment of the present invention effectively reduce the overall level while maintaining the black resolution of the contrast adjustment curve for the image of the background area. It is possible to reduce the luminance of the image of.

In order to solve the above-described problems, an image display device and an image processing method thereof according to an embodiment of the present invention effectively output a local dimming control signal for reducing the brightness of a backlight module corresponding to the background area. Luminance can be reduced.

As described above, the image display device and the control method thereof according to the present invention can further increase a three-dimensional effect in the entire image by reducing the brightness of the image in the background area.

As described above, the image display device and its control method according to the present invention can reduce power consumption by reducing the brightness of an image in a background area through dynamic contrast adjustment or local dimming control.

As described above, the image display device and the control method thereof according to the present invention can protect both eyesight and fatigue of a user while reducing power consumption.

1 is a control block diagram of an image display device according to an embodiment of the present invention.

2 illustrates an example of dynamic contrast adjustment of a background processing unit according to an embodiment of the present invention.

3 is a flowchart illustrating a method of setting an image quality processing mode in an image display device according to an embodiment of the present invention.

4 illustrates an example of a UI menu related to an image quality processing mode of an image display device according to an embodiment of the present invention.

5 is a flowchart illustrating an image processing method of an image display device according to an embodiment of the present invention, and FIG. 6 is a diagram schematically illustrating the image processing method of FIG. 5.

7 is a control block diagram of an image display device according to another embodiment of the present invention.

8 is a flowchart illustrating an image processing method of an image display device according to another exemplary embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in a variety of different forms, and only these embodiments make the disclosure of the present invention complete, and are common knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to those who have, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

1 is a control block diagram of an image display device according to an embodiment of the present invention. The image display device according to the present embodiment includes a signal receiving unit 10, a scaler 20, a frame memory 21, a foreground detecting unit 30, a foreground processing unit 31, a background processing unit 40, a synthesizing unit 50, and And a control unit 60.

The signal receiving unit 10 is for receiving a signal from the outside, and a broadcast receiving unit 11 for receiving a broadcast signal, an external device interface unit 13 for connection with an external device, and a network interface unit for Internet connection (15) may be included.

The broadcast receiver 11 may include an RF tuner that receives an RF broadcast signal, tunes a channel, and outputs an IF signal, and a demodulator that demodulates the IF signal converted by the tuner.

The external device interface unit 13 includes, for example, a High Definition Multimedia Interface (HDMI) connector, a component video connector, a composite video connector, for receiving content from a PC, a set-top box, or a multimedia playback device. It may include a D-sub connector or the like.

The network interface unit 15 includes a communication module for connecting to a wired/wireless network including an Internet network. The network interface unit 15 includes an Ethernet terminal for connection to a wired network, or WLAN (Wireless LAN) (Wi-Fi), Wibro (Wireless broadband), for connection to a wireless network. Wimax (World Interoperability for Microwave Access) and HSDPA (High Speed Downlink Packet Access) communication standards can be used.

The scaler 20 is for adjusting the size of the received image, and can be scaled vertically or horizontally and vertically.

The frame memory may store the received image signal and temporarily store data scaled by the scaler 20.

The foreground detection unit 30 detects a foreground region from the scaled image data stored in the frame memory. Here, the foreground refers to an important part in the image screen, for example, a central person, an object, a moving object, etc. of the screen. A method of detecting a foreground area in an input image can be detected by extracting a specific area through a histogram analysis or by using a color distribution. In addition, an object may be detected using a frame-by-frame difference of image or an outline, or geometrical edge-to-feature mapping information may be extracted, and a foreground object may be detected based on this. The foreground detection unit 30 of the present invention may detect a foreground or a foreground region using various foreground detection algorithms. The foreground detection unit 30 can be implemented with a foreground detection algorithm and a processor that processes the algorithm.

The foreground processing unit 31 is for 3D enhancement processing for an image in the foreground region, and is implemented including an algorithm for image quality processing and a processor for executing the algorithm. The foreground processing unit 31 receives information on the location and size of the foreground area from the foreground detection unit 30, and provides contrast, noise reduction, and edge restoration of the foreground image corresponding to the location and size of the foreground area. Edge Restoration), edge enhancement, gamma correction, color, tint, and sharpness. A setting value for each image quality adjustment item of the foreground processing unit 31 is set by the control unit 60 to be described later.

The background processing unit 40 is for processing an image of a background area other than a foreground area in an image frame, and is implemented including an algorithm for image quality processing and a processor for executing the algorithm. Here, the background region refers to a background screen including, for example, a background background, a mountain, a tree, and the like, which are of less importance in the image. The background processing unit 40 receives position and size information on the foreground area from the foreground detection unit 30 and processes the image of the background area other than the foreground. The background processing unit 40 reduces the overall luminance level of the image in the background area.

The background processing unit 40 includes a dynamic contrast adjustment unit for varying the contrast level according to the luminance level of the image input with respect to the image in the background area. The dynamic contrast adjustment unit reduces the overall luminance level of the image when adjusting the dynamic contrast of the image in the background area. The setting value for the contrast adjustment item of the background processing unit 40 is set by the control unit 60 to be described later. Contrast adjustment items of the dynamic contrast adjustment unit may be gamma, look-up table, backlight brightness, and the like, and the background processing unit 40 processes the image quality of the background image in response to a setting value set by the control unit 60.

2 shows an example of dynamic contrast adjustment of the background processing unit 40. Referring to FIG. 2, FIG. 2(a) shows a gamma curve applied in a general mode among dynamic contrast adjustment items, for example, an image quality processing mode that does not process a 3D effect, and FIG. 2(a) is a background It shows a gamma curve applied to an image. As shown in FIG. 2, in the gamma curve in the normal mode, the gain is reduced by about 20% to reduce the total luminance level while maintaining the black resolution. Accordingly, the effect of the screen contrast ratio in the background image remains as it is, but the overall luminance is lowered, thereby reducing power consumption and further enhancing the effect of enhancing the three-dimensional effect of the foreground. In FIG. 2, a gamma curve is described as an example, but the same can be applied to a case where the luminance level is reduced by using a contrast curve or a lookup table. That is, the gain is reduced so that the overall luminance level is lowered while maintaining the black resolution. The operation of the background processing unit 40 described above is a technique suitable for application to the display panel 70, for example, an OLED panel capable of adjusting the luminance level of each image pixel.

The synthesizing unit 50 synthesizes and outputs the image of the foreground processing unit 31 and the image of the background processing unit 40.

The control unit 60 is in charge of overall control of the image display device according to a user command or an internal program input through the user input interface unit 90. The control unit 60 separates the foreground and the background from the image signal from the signal receiving unit 10 in accordance with the image reproduction command received through the user input interface unit 90 to enhance a three-dimensional effect to display the display panel 70. Control so that it can be output through.

As described above, the control unit 60 sets the image quality item and the image quality item adjustment value of the foreground processing unit 31 and the background processing unit 40 to enhance the 3D effect of the foreground image and reduce the total luminance level of the background image, While making the foreground appear more prominent in the image, power consumption can be effectively reduced.

The controller 60 may be implemented by including a program code for signal processing and control, a memory (not shown) for storing the same, and a processor (not shown) for executing the same. The memory (not shown) may store programs for processing and controlling each signal, and may store various OSs, middleware, platforms, and various applications of the image display device.

The image display device according to the present exemplary embodiment further includes a panel drive control unit 80, a display panel 70, and a user input interface unit 90.

The display panel 70 is for displaying an image on a screen, such as a liquid crystal display (LCD) panel, a light emitting diode (LED) panel, an organic light emitting diode (OLED) panel, etc. It can be implemented as The display panel 70 according to the present invention includes a display module and a display driver driving the display module.

The panel drive control unit 80 is for controlling the driving of the display panel 70, converts the image signal output through the synthesis unit 50 into a format suitable for the display panel 70 and outputs it, and adjusts the white balance and gamma. The driving of the display panel 70 is controlled through timing control. When the background processing unit 40 reduces the luminance level of the background image by adjusting the gamma value, the panel drive control unit 80 receives the adjusted gamma value and adjusts the gamma value of the image.

The user input interface unit 90 is for transmitting a signal input by a user to the control unit 60 or for transmitting a signal from the control unit 60 to the remote control device 200, and communicates with the remote control device 200. It may include a communication module for. For example, the user input interface unit 90 can be remotely configured according to various communication methods such as Bluetooth, WB (Ultra Wideband), ZigBee, RF (Radio Frequency) communication method, or infrared (IR) communication method. A communication module capable of receiving and processing control signals such as power on/off, channel selection, and image quality setting from the control device 200 or to transmit a control signal from the control unit 60 to the remote control device 200 It may include.

The control unit 60 includes a UI generation unit 61 that generates a UI menu for receiving a user input regarding separation of a foreground area and a background area and a three-dimensional effect enhancement process. The UI menu includes a menu item for selecting a depth intensity for enhancing a three-dimensional effect on an image in the foreground area. The control unit 60 adjusts setting values for image quality processing of the foreground processing unit 31 and the background processing unit 40 in response to the depth intensity selected through the user input interface unit 90.

In this way, the present invention detects the foreground and performs a separate 3D effect enhancement process for the image in the foreground area, and reduces the overall luminance level by reducing the gain for the background image so that the foreground image further increases the 3D effect, while the display panel The power consumption of 70 can be reduced.

Hereinafter, a method for selecting and adjusting a 3D effect in the image display device according to an exemplary embodiment will be described with reference to FIGS. 3 and 4. 3 is a flowchart illustrating a method of setting an image quality processing mode in an image display device according to an embodiment of the present invention. Referring to FIG. 3, when the user selects a menu related to the image quality processing mode (S10), the controller 60 generates a UI menu related to the image quality processing mode and controls it to be displayed on the display panel 70 (S11). 4 illustrates an example of a UI menu related to an image quality processing mode of an image display device according to an embodiment of the present invention. FIG. 4A shows a foreground detection mode related to the foreground and background separation and 3D effect enhancement processing according to the present invention, that is, a UI menu 61a for selecting a 3D effect mode on the screen. It is expressed as.

When the user selects the 3D effect mode, that is, the foreground detection mode (S12), the controller 60 generates a UI menu for selecting the depth intensity of the three-dimensional effect and controls it to be displayed on the display panel 70 (S13). 4B shows a UI menu 61b for selecting the depth intensity of a three-dimensional effect in the 3D effect mode, and the depth intensity is divided into three levels of'up, middle, and bottom'.

When the user selects any one of'upper, middle, and lower', the control unit 60 includes the foreground processing unit 31 and the background processing unit 40 so that image quality can be processed with a depth intensity of a three-dimensional effect corresponding to the user's selection. Values of the quality items are set (S14). The control unit 60 controls the image quality processing of the foreground processing unit 31 and the background processing unit 40 by establishing the image quality adjustment items and adjustment values according to the depth of the three-dimensional effect as a data table in advance, and setting the image quality items in response thereto. can do.

The image display device according to the present invention may adjust not only the intensity related to the 3D enhancement processing by the foreground processing unit 31 but also a reduction value of the luminance level of the image in the background region according to the depth intensity of the 3D effect set by the user. For example, if the depth intensity of the three-dimensional effect is set to'image', the luminance level of the image in the background area can be further adjusted to be larger so that the foreground image becomes more prominent.

Hereinafter, an image processing method of an image display device according to an exemplary embodiment will be described with reference to FIGS. 5 and 6. 5 is a flowchart illustrating an image processing method of an image display device according to an embodiment of the present invention, and FIG. 6 is a diagram schematically illustrating the image processing method of FIG. 5.

Referring to FIG. 5, when an image is reproduced in an image display device, the controller 60 checks whether a 3D effect mode, that is, a foreground detection mode, is set in the image quality processing mode (S20). If the 3D effect mode is set, the control unit 60 checks the set depth intensity and controls the foreground detection unit 30, the foreground processing unit 31, and the background processing unit 40 to operate in the 3D effect mode. The foreground detection unit 30 detects a foreground area from the input image (S21), and provides location information and size information about the foreground area to the foreground processing unit 31. The foreground detection unit 30 performs a three-dimensional effect enhancement processing of the image in the foreground region in response to the image quality item and the image quality adjustment value according to the depth intensity set by the control unit 60 (S22).

On the other hand, the background processing unit 40 reduces the dynamic contrast ratio, that is, the dynamic contrast gain set by the control unit 60 for the image of the background area other than the foreground area, thereby reducing the total luminance level while maintaining the black resolution (S23).

The synthesizing unit 50 synthesizes and outputs the foreground image output from the foreground processing unit 31 and the background image output from the background processing unit 40 (S24). The panel drive control unit 80 converts the image output from the synthesis unit 50 according to the display format of the display panel 70, and adjusts gamma according to the values calculated by the foreground processing unit 31 and the background processing unit 40. To be displayed on the display panel 70 (S25).

Referring to FIG. 6, FIG. 6A shows an input image input to an image display device, and FIG. 6B shows an image of a foreground area processed by the foreground processing unit 31. In Fig. 6A, it can be seen that a three-dimensional effect is augmented by detecting a moving bird and an object as a foreground. 6C shows that the background processing unit 40 reduces the total luminance level of the image in the background region. FIG. 6D shows a screen synthesized by the combining unit 50 and displayed on the display panel 70. As a whole, it can be seen that the three-dimensional effect of the foreground is remarkably expressed and the three-dimensional effect is enhanced.

In the above-described embodiment, it has been described that the background processing unit 40 processes the image of the background area other than the foreground area, but in FIG. 6, it is confirmed that the background processing unit 40 has processed the image of the entire frame including the foreground area. I can. Since the synthesis unit 50 synthesizes the foreground image and the background processing unit 40 processes only the background image and the entire image, there is no difference in the output image. Therefore, if it is easier and faster to process the entire image than to separate the background, the background processing unit 40 may process the entire image as shown in FIG. 6.

Hereinafter, an image display device and an image processing method thereof according to another exemplary embodiment of the present invention will be described with reference to FIGS. 7 and 8. Since it is difficult to adjust the brightness of each pixel in an image display device such as an LCD panel that adjusts the brightness by the backlight module 75, it is possible to enhance the three-dimensional effect of the image in a different way from the previous embodiment.

7 is a control block diagram of an image display device according to another embodiment of the present invention. The image display device according to the present embodiment includes a signal receiving unit 10, a scaler 20, a frame memory 21, a foreground detecting unit 30, a foreground processing unit 31, a background processing unit 40, a synthesizing unit 50, and A control unit 60, a user input interface unit 90, a display panel 70, and a panel drive control unit 80 are included. Descriptions overlapping with the above-described embodiments will be omitted as necessary, and a description will be made focusing on the differences from the above-described embodiments. In addition, some components such as the signal receiving unit 10 and the user input interface unit 90 are omitted in FIG. 7, but these are omitted for convenience of description. In this embodiment, the signal receiving unit 10, the scaler 20, the frame memory 21, the foreground detection unit 30, the foreground processing unit 31, the synthesis unit 50, the panel drive control unit 80, the user input interface unit Since the operation of (90) is the same as that of the above-described embodiment, the detailed description is replaced with the above description.

The display panel 70 includes a display module 71, a display driver 73 for driving the display module 71, a plurality of backlight modules 75 for irradiating light to the display module 71, and a backlight module 75 It includes a backlight driver 77 for driving. The backlight module 75 may be a Cold Cathode Fluorescent Lamp (CCFL), a Light Emitting Diode (LED) lamp, and the like, and the backlight driver 77 is a turn-on of the backlight module 75. Controls /off. In the present invention, the backlight module 75 is provided with an LED lamp, and the backlight can be divided into a plurality of blocks and a dimming value can be adjusted for each block. In FIG. 7, a plurality of backlight modules 75 corresponding to a plurality of blocks are represented.

The control unit 60 includes a PWM control unit 63 that performs Pulse Width Modulation control related to dimming of the backlight unit. Because it is difficult to control the brightness of each pixel due to the characteristics of the LCD display panel 70, the image in the foreground region detected by the foreground detection unit 30 is subjected to a three-dimensional effect enhancement process, but the background region is subjected to backlight local dimming. Decrease.

Specifically, the control unit 60 receives information on the location and size of the foreground area from the foreground detection unit 30, and transmits a local dimming control signal to the backlight driver 77 so that the brightness of the backlight corresponding to the background area is reduced. Print it out. The PWM control unit 63 may reduce the brightness by reducing the duty cycle of the local dimming PWM signal or controlling the frequency.

The PWM control unit 63 may be set to output a dimming control signal that reduces the brightness of the backlight module 75 corresponding to the background area by 20 to 50% from the existing level. In addition, the reduction value of the luminance level of the image in the background area may be adjusted according to the depth intensity of the three-dimensional effect set by the user. For example, if the depth intensity of the three-dimensional effect is set to'image', the luminance level of the image in the background area can be further adjusted to be larger so that the foreground image becomes more prominent.

8 is a flowchart illustrating an image processing method of the image display device of FIG. 7. Referring to FIG. 8, when reproducing an image in an image display device, the controller 60 checks whether a 3D effect mode, that is, a foreground detection mode, is set in the image quality processing mode (S30). If the 3D effect mode is set, the control unit 60 checks the set depth intensity and controls the foreground detection unit 30, the foreground processing unit 31, and the background processing unit 40 to operate in the 3D effect mode. Specifically, the foreground detection unit 30 detects a foreground area from the input image (S31), and provides location information and size information about the foreground area to the foreground processing unit 31. The foreground detection unit 30 performs a three-dimensional effect enhancement processing of the image in the foreground region in response to the image quality item and the image quality adjustment value according to the depth intensity set by the control unit 60 (S32).

Meanwhile, the background processing unit 40 processes an image or an entire image of a background region other than the foreground region in a general mode (S33).

The synthesizing unit 50 synthesizes and outputs the foreground image output from the foreground processing unit 31 and the background image output from the background processing unit 40 (S34). The controller 60 receives position and size information about the foreground area and outputs a dimming control signal to reduce the brightness of the backlight module 75 corresponding to the background area (S35). The panel drive control unit 80 converts the image output from the synthesis unit 50 according to the display format of the display panel 70 to be displayed on the display module 71 (S36). In this case, the controller 60 may control the brightness of the image in the foreground area to be brighter.

In this way, the image display device according to the present invention separates the foreground and the background, and instead of performing a process to enhance a three-dimensional effect in the foreground, the image in the background area decreases the brightness, so that the three-dimensional effect of the foreground image is more prominent in the entire image The power consumption of the display panel 70 can be reduced.

Meanwhile, the method of operating an image display device of the present invention may be implemented as a code that can be read by a processor on a recording medium that can be read by a processor provided in the image display device. The processor-readable recording medium includes all types of recording devices that store data that can be read by the processor. Examples of recording media that can be read by the processor include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, etc., and also include those implemented in the form of carrier waves such as transmission through the Internet. . In addition, the recording medium readable by the processor may be distributed over a computer system connected through a network, so that code readable by the processor may be stored and executed in a distributed manner.

In addition, although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the technical field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. In addition, various modifications are possible by those of ordinary skill in the art, and these modifications should not be understood individually from the technical spirit or prospect of the present invention.

Claims

In the image display device,

A foreground detection unit that detects a foreground region from the input image;

A foreground processing unit that enhances a three-dimensional effect on the image of the foreground region;

A background processing unit that processes an image of a background area excluding the foreground area;

A synthesizing unit for synthesizing the image of the foreground region and the image of the background region; And

And a control unit for controlling image quality processing of the foreground processing unit and the background processing unit.
The method of claim 1,

Wherein the control unit controls the background processing unit to decrease the luminance level of the image in the background area.
The method of claim 2,

The background processing unit includes a dynamic contrast adjustment unit for varying the contrast level according to the luminance level of the input image with respect to the image in the background area;

Wherein the control unit controls the dynamic contrast adjustment unit to decrease a luminance level when adjusting the dynamic contrast of the image in the background area.
The method of claim 3,

The background processing unit includes a dynamic contrast adjustment unit for varying the contrast level according to the luminance level of the input image with respect to the image in the background area;

Wherein when the dynamic contrast adjustment unit adjusts the dynamic contrast of the image in the background area, the controller controls the overall level to be reduced while maintaining the black resolution of the contrast adjustment curve.
The method of claim 3,

The dynamic contrast adjustment unit variably processes a contrast level based on a gamma curve or a lookup table;

And the control unit controls the dynamic contrast adjustment unit to reduce a gain when adjusting the contrast of the image in the background area.
The method of claim 5,

A display panel that displays an image; And

A panel driving control unit for converting the image output from the synthesizing unit to be displayed on the display panel;

And the panel driving control unit driving and controlling the display panel according to a gamma value adjusted by the dynamic contrast adjustment unit.
The method of claim 1,

A display module displaying the image on a screen;

A display driver driving the display module;

A plurality of backlight modules irradiating light to the display module; And

Further comprising a backlight driver for driving the plurality of backlight modules;

The control unit includes a PWM (Pulse Width Modulation) control unit that adjusts the brightness of the backlight driving unit, and the PWM control unit outputs a dimming control signal for reducing the brightness of the backlight module corresponding to the background area. Display device.
The method of claim 7,

The PWM control unit outputs a dimming control signal for reducing the brightness of the backlight module corresponding to the background area by 15 to 40% from an existing level.
The method of claim 1,

The control unit includes contrast, noise reduction, edge restoration, edge enhancement, gamma correction, color, tint, and sharpness ( sharpness) by setting an adjustment value for at least one image quality item, and controlling the foreground processing unit to enhance the three-dimensional effect on the image in the foreground area.
The method of claim 9,

Further comprising a user input interface unit for user input;

The control unit includes a UI generating unit for generating a UI menu for receiving a user input regarding separation processing of the foreground area and the background area;

The UI menu includes a menu item for selecting a depth intensity for enhancing a three-dimensional effect for an image in the foreground area;

And the control unit adjusts a setting value for image quality processing of the foreground processing unit in response to a depth intensity selected from the menu item through the user input interface unit.
Detecting a foreground area from the input image;

Enhancing a three-dimensional effect on the image of the foreground area;

Reducing a luminance level of an image in a background area excluding the foreground area; And

And synthesizing the image of the foreground region and the image of the background region.
The method of claim 11,

The step of reducing the luminance level of the image in the background area comprises reducing the overall level while maintaining the black resolution of a preset contrast adjustment curve when the dynamic contrast of the image in the background area is adjusted. Treatment method.
Detecting a foreground area from the input image;

Enhancing a three-dimensional effect on the image in the foreground area;

Processing an image of a background area excluding the foreground area;

Synthesizing the image of the foreground area and the image of the background area; And

And outputting a dimming control signal for reducing brightness of a backlight module corresponding to the background area.
The method according to any one of claims 11 to 13,

The processing of the image of the foreground area may include: Contrast, Noise Reduction, Edge Restoration, Edge Enhancement, gamma correction, and color. , A three-dimensional effect on the image of the foreground region by adjusting at least one of a tint and sharpness.
The method of claim 14,

Generating a UI menu for selecting a depth intensity for a three-dimensional effect enhancement processing for the image in the foreground area; And

And adjusting a setting value for image quality processing of the foreground area corresponding to the depth intensity selected in the UI menu.