KR101639949B1 - Apparatus and method for stereoscopic image post-processing with reduced visual fatigue - Google Patents

Abstract

The stereoscopic image display apparatus according to embodiments of the present invention includes an image decoding unit for decoding the source image data encoded by a predetermined moving picture encoding format to recover stereoscopic image data, an image decoding unit for separating the original stereoscopic images from the reconstructed stereoscopic image data, A stereoscopic image post-processing unit for generating corrected stereoscopic images by correcting the brightness contrast values of the object area and the background area with respect to a predetermined reference brightness contrast value with respect to the original stereoscopic images, And may include a formatter for formatting according to a stereoscopic image display method and transmitting the formatted image to a display.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a stereoscopic image post-processing apparatus and method capable of reducing visual fatigue,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stereoscopic image technique, and more particularly, to a visual fatigue of a stereoscopic image.

The most well-known method for displaying stereoscopic images is a method of separating left eye image and right eye image, which are represented by red arrows, using a color filter having a complementary color relationship, a method of selecting a left eye image and a right eye image, A method of selecting the left eye image only on the left eye using the shutter glasses, and a method of making the right eye image appear only on the right eye. The method using sunglasses has the disadvantage that the object is not displayed in natural color. In the method using polarizing glasses, the left eye image is seen in the right eye or the right eye image is displayed in the left eye according to the polarization ability, and the stereoscopic effect is deteriorated. The method using the shutter glasses has a disadvantage in that the image appears to blink due to the opening and closing of the shutter. Various methods for overcoming these drawbacks and expressing 3D images more realistically are being studied.

On the other hand, ghost phenomenon is one of the problems that a viewer sees when viewing a stereoscopic image. The ghost phenomenon is a phenomenon in which an afterimage remains on the display, and the ghost phenomenon occurring in the stereoscopic image causes the images to overlap, increasing the visual fatigue of the viewer, causing a headache, dizziness, etc., And the like. Accordingly, in order to expand the stereoscopic-related market, it is necessary to suppress or minimize the ghost phenomenon to eliminate the visual fatigue of viewers.

In addition, excessive depth setting for the three-dimensional feeling can cause visual fatigue. The depth of vision due to the depth varies depending on the person, so the visual fatigue due to the depth also varies depending on the person. However, reducing depth to reduce visual fatigue is not a solution because it reduces the depth of detail for everyone.

Thus, there is a need for a technique for reducing the visual fatigue while maintaining the stereoscopic effect during the stereoscopic viewing.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stereoscopic image post-processing apparatus and method capable of reducing visual fatigue.

The object of the present invention is to provide a stereoscopic image post-processing apparatus and method capable of reducing visual fatigue based on contrast.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stereoscopic image post-processing apparatus and method capable of reducing visual fatigue without damaging the stereoscopic effect by adjusting the depth.

The solution to the problem of the present invention is not limited to those mentioned above, and other solutions not mentioned can be clearly understood by those skilled in the art from the following description.

A stereoscopic image display device according to an aspect of the present invention includes:

An image decoding unit decoding the source image data encoded by the predetermined moving picture encoding format to reconstruct the stereoscopic image data;

A stereoscopic image separating unit for separating the original stereoscopic images from the restored stereoscopic image data;

A stereoscopic image post-processing device for generating corrected stereoscopic images in which brightness contrast values of an object area and a background area of the original stereoscopic images are corrected according to a predetermined reference brightness contrast value; And

And a formatter for formatting the corrected stereoscopic images according to a predetermined stereoscopic image display method and transmitting the formatted stereoscopic images to the display.

According to one embodiment, the stereoscopic image post-

An object background identification unit for distinguishing an object region and a background region having a three-dimensional sense from the original stereoscopic images;

A color model converting unit for converting original stereoscopic images of the first color model into converted stereoscopic images of a second color model including a brightness component;

The identified object region and background region are superimposed on the converted stereoscopic images of the second color model to acquire the brightness distribution of the object region and the brightness distribution of the background region respectively and if the brightness contrast value of the object region and the background region is smaller than a predetermined reference A brightness contrast value correcting unit for generating corrected stereoscopic images of the second color model by respectively adjusting the brightness distribution of the object area and the brightness distribution of the background area so as to be corrected according to the brightness contrast value; And

And a color model inverse transformer for inversely converting the corrected stereoscopic images of the second color model having the brightness distribution of the adjusted object region and the brightness distribution of the adjusted background region into the corrected stereoscopic images of the first color model.

According to an exemplary embodiment, the object background identification unit may operate to distinguish the object region and the background region based on the disparity map of the original stereoscopic images.

According to one embodiment, the object background identification unit

A gray scale image converting unit for converting the original stereoscopic images into images of gray scale;

An object boundary detection unit that detects a boundary that separates an object region and a background region according to a correlation value obtained by correlating blocks in the same position in each of a plurality of gray scale images; And

And an object region determining unit that determines an object region among the regions divided by the detected boundaries.

According to one embodiment, the first color model in the color model conversion unit is an RGB color model, and the second color model is an HSI color model, an HSL color model, an HSV color model, a YCbCr color model, a YUV color model, ≪ / RTI >

According to one embodiment, the brightness contrast value correcting unit

Acquiring an average of the object area brightness of pixels belonging to the object area and a brightness average of the background area of pixels belonging to the background area among the converted stereoscopic images of the second color model,

The brightness correction amount is calculated by the following equation so that the brightness contrast value before correction calculated as the ratio of the background area brightness average to the object area brightness average before correction can be corrected to the reference brightness contrast value:

(Where, k is a reference brightness contrast value, I _O is an average brightness of an object region, I _B is a brightness average of a background region, and q is a brightness correction amount)

And correct the object area brightness distribution by the brightness correction amount to generate corrected stereoscopic images of the second color model.

According to one embodiment, the reference brightness contrast value may be 30%.

According to an exemplary embodiment, the reference brightness contrast value may be defined as a range having a lower limit of 30% or less and an upper limit of 30% or more.

According to one embodiment, the brightness contrast value correcting unit may be operable to add, to the brightness data of each of the pixels, a value obtained by multiplying a brightness correction amount by a weight differentially given based on the distance from the boundary in the object zone.

According to another embodiment of the present invention, a stereoscopic image post-processing apparatus for correcting original stereoscopic images and generating corrected stereoscopic images in a stereoscopic image display apparatus includes:

An object background identification unit for distinguishing an object region and a background region having a three-dimensional sense from the original stereoscopic images;

A color model converting unit for converting original stereoscopic images of the first color model into converted stereoscopic images of a second color model including a brightness component;

A brightness contrast value correcting unit for generating corrected stereoscopic images of the second color model by respectively adjusting the brightness distribution of the object region and the brightness distribution of the background region according to a predetermined reference brightness contrast value; And

And a color model inverse transformer for inversely converting the corrected stereoscopic images of the second color model having the brightness distribution of the adjusted object region and the brightness distribution of the adjusted background region into the corrected stereoscopic images of the first color model.

According to still another aspect of the present invention, there is provided a stereoscopic image post-processing method for correcting original stereoscopic images in a stereoscopic image display device to generate corrected stereoscopic images,

Wherein the stereoscopic image display device comprises:

A step of distinguishing the object region and the background region having a stereoscopic effect from the original stereoscopic images;

Converting original stereoscopic images of the first color model into converted stereoscopic images of a second color model including a brightness component;

Generating corrected stereoscopic images of the second color model by adjusting the brightness distribution of the object region and the brightness distribution of the background region respectively according to a predetermined reference brightness contrast value; And

Converting the corrected stereoscopic images of the second color model having the brightness distribution of the adjusted object region and the brightness distribution of the adjusted background region into the corrected stereoscopic images of the first color model.

According to one embodiment, the step of distinguishing the object zone from the background zone

And separating the object area and the background area based on the disparity map of the original stereoscopic images.

According to one embodiment, the step of distinguishing the object zone from the background zone

Converting the original stereoscopic images into grayscale images;

Detecting a boundary that separates an object region and a background region according to a correlation value obtained by correlating blocks in the same position in each of a plurality of gray scale images; And

And determining an object zone among the zones divided by the detected boundary.

According to one embodiment, the first color model in the color model conversion unit is an RGB color model, and the second color model is an HSI color model, an HSL color model, an HSV color model, a YCbCr color model, a YUV color model, ≪ / RTI >

According to an embodiment, the step of generating corrected stereoscopic images of the second color model comprises:

Obtaining an average of the object area brightness of pixels belonging to the object area and a brightness average of the background area of pixels belonging to the background area among the converted stereoscopic images of the second color model;

The brightness correction amount is calculated by the following equation so that the brightness contrast value before correction calculated as the ratio of the background area brightness average to the object area brightness average before correction can be corrected to the reference brightness contrast value:

Calculating in accordance with (here, k is compared to the reference brightness value, I _O is the mean, I _B is the background area brightness average brightness object zone, q is a brightness correction amount); And

And correcting the object region brightness distribution by the brightness correction amount to generate corrected stereoscopic images of the second color model.

According to one embodiment, the reference brightness contrast value may be 30%.

According to an exemplary embodiment, the reference brightness contrast value may be defined as a range having a lower limit of 30% or less and an upper limit of 30% or more.

According to one embodiment, the step of generating corrected stereoscopic images of the second color model by correcting the object area brightness distribution by the brightness correction amount comprises:

And adding a value obtained by multiplying a weight given differentially based on the distance from the boundary in the object region by the brightness correction amount, to the brightness data of each pixel.

According to the stereoscopic image post-processing apparatus and method capable of reducing the visual fatigue of the present invention, visual fatigue can be reduced based on contrast.

According to the stereoscopic image post-processing apparatus and method capable of reducing the visual fatigue of the present invention, it is possible to reduce the visual fatigue without damaging the three-dimensional feeling by adjusting the depth.

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

1 is a block diagram illustrating a stereoscopic image post-processing apparatus and a stereoscopic image display apparatus including the stereoscopic image post-processing apparatus according to an embodiment of the present invention.
2 is a flowchart illustrating a stereoscopic image post-processing method according to an embodiment of the present invention.
FIGS. 3, 4 and 5 illustrate the performance of the stereoscopic image post-processing apparatus according to an embodiment of the present invention. FIG. 3 illustrates a case where the brightness of the whole image is increased collectively before correction, And the left and right stereoscopic images after correcting the brightness ratio of the object and the background according to the stereoscopic image post-processing method according to the embodiment.

For the embodiments of the invention disclosed herein, specific structural and functional descriptions are set forth for the purpose of describing an embodiment of the invention only, and it is to be understood that the embodiments of the invention may be practiced in various forms, The present invention should not be construed as limited to the embodiments described in Figs.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

Throughout this specification, the term "brightness" is used as an achromatic component in pixel data, including luminance, Y, luma, Y ' Intensity, I).

1 is a block diagram illustrating a stereoscopic image post-processing apparatus and a stereoscopic image display apparatus including the stereoscopic image post-processing apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the stereoscopic image display apparatus 10 includes an image decoding unit 11, a stereoscopic image separating unit 12, a stereoscopic image post-processing apparatus 100, a formatter 13, have.

The image decoding unit 11 decodes the source image data encoded by the predetermined moving image encoding format to reconstruct the stereoscopic image data.

The stereoscopic image separating unit 12 separates two stereoscopic images, that is, a left stereoscopic image and a right stereoscopic stereoscopic image, from the reconstructed stereoscopic image data, for example, in the case of stereoscopic stereoscopic images.

The stereoscopic image post-processing apparatus 100 generates corrected stereoscopic images in which the brightness contrast values of the object area and the background area of the original stereoscopic images are corrected according to a predetermined reference brightness contrast value.

The formatter 13 formats the corrected stereoscopic images according to a predetermined stereoscopic image display system, for example, a time division shutter glass system or a polarization system, and transmits the formatted images to the display 14.

The stereoscopic image post-processing apparatus 100 according to an exemplary embodiment of the present invention includes a stereoscopic image post-processing apparatus 100 for generating corrected stereoscopic images in which brightness contrast values of an object area and a background area of original stereoscopic images are corrected according to a predetermined reference brightness contrast value, An object background identification unit 110, a color model conversion unit 120, a brightness contrast value correction unit 130, and a color model inversion unit 140.

The object background identification unit 110 distinguishes the object area having a three-dimensional sense from the original stereoscopic images and the background area. The designer can decide empirically whether the object area and the background area should be distinguished based on a certain degree of three-dimensional feeling.

More specifically, according to the embodiment, the object background identification unit 110 can distinguish the object area from the background area based on a disparity map of the original stereoscopic images.

In another embodiment, the object background identification unit 110 includes a gray-scale image conversion unit 111 for converting original stereoscopic images into images of gray scale, An object boundary detection unit 112 for detecting a boundary that distinguishes between an object region and a background region according to a correlation value obtained by correlation calculation between blocks, an object region determination unit 112 for determining an object region among the regions divided by the detected boundary Section 113. [0034]

The gray-scale image conversion unit 111 converts each pixel data of the original stereoscopic images, for example, by replacing a value of one of the RGB color models, that is, the first color model, or an average value of two or more color components, Lt; / RTI >

On the other hand, for gray-scale images, a boundary can be detected through a predetermined boundary detection algorithm.

For example, if two blocks at the same position are in the background, the two blocks have almost the same pixel values, so that the correlation value will be calculated to be high. On the other hand, if any one of the two blocks corresponds to the edge of an object in one image and corresponds to the background in another image, then the two blocks are likely to have different pixel values and the correlation value is calculated to be low Will be. Even if both blocks are objects, since the two blocks have almost the same pixel values, the correlation value can be calculated to be high.

In this exemplary manner, the object boundary detection unit 112 can simply detect the boundary between the object region and the background region.

Subsequently, the object region determining unit 113 can determine an area constituting the menopause path as an object area, and an area not including the boundary as background areas, from among the two areas divided by the detected boundary.

Depending on the embodiment, the object region determining unit 113 may determine whether the corresponding region is an object region or a background region with reference to a disparity map with respect to several representative pixel positions in a region constituting a menopause path and in an area not constituting the menopausal path .

Although the distinction between the object region and the background region in the object background discrimination section 110 is not strict, the designer can compromise between accuracy, calculation amount and speed depending on the situation.

Next, the color model converting unit 120 converts the original stereoscopic images of the first color model into the converted stereoscopic images of the second color model including the brightness components.

Illustratively, the first color model may be an RGB color model, the second color model may be a HSI (Hue, Saturation, Intensity) color model, an HSL color model, an HSV color model, A YCbCr color model, a YUV color model, a YIQ color model, or other color models equivalent to or capable of replacing them.

It is well known that the first color model and the second color models can be transformed or inversely transformed according to a definition defined by an authority such as CIE (Commission Internationale de L'eclairage).

Next, the brightness contrast value correcting unit 130 superimposes the identified object region and background region on the converted stereoscopic images of the second color model to obtain the brightness distribution of the object region and the brightness distribution of the background region, respectively, The corrected stereoscopic images of the second color model are generated by adjusting the brightness distribution of the object area and the brightness distribution of the background area so that the brightness contrast value of the background area is corrected according to the predetermined reference brightness contrast value.

Specifically, the brightness contrast value correcting unit 130 may obtain the average brightness of the object region of the pixels belonging to the object region and the average brightness of the background regions of the pixels belonging to the background region, among the converted stereoscopic images of the second color model.

Also, the brightness contrast value correcting unit 130 corrects the brightness correction amount so that the brightness contrast value before correction calculated as the ratio of the average brightness of the background region to the average brightness of the object region before correction can be corrected to the reference brightness contrast value. 2 can be determined as follows.

Here, k is a reference brightness contrast value, I _O is an average brightness of an object region, I _B is a brightness average of a background region, and q is a brightness correction amount.

The brightness contrast value correcting unit 130 corrects the object region brightness distribution by the brightness correction amount q, for example, by adding the brightness correction amount q to the brightness data of all the pixels in the object region to generate corrected stereoscopic images of the second color model do.

Depending on the embodiment, k may be 30%. If there is a brightness contrast value of more than 30% between the object and the background, for example, a difference in brightness, the person may feel a somewhat unnatural feeling. On the other hand, if there is a brightness contrast value of less than 30% between the object and the background, for example, a brightness difference, the three-dimensional feeling may drop sharply depending on the person.

Accordingly, the brightness contrast value correcting unit 130 may increase the brightness contrast value between the object and the background to 30% if the brightness contrast value is lower than the reference brightness contrast value, or may decrease the brightness contrast value to 30% if the brightness contrast value exceeds 30%.

Since it is natural that a three-dimensional sensation appears in an object other than the background, it is reasonable that the correction of the brightness contrast value between the object and the background is performed by a method of correcting the brightness of the object rather than the brightness of the background.

According to an embodiment, the reference brightness contrast value k may be a range, not a single value, e.g., 30 < k < 40. In this case, if the contrast-before-correction brightness value is lower than the lower limit of the reference brightness contrast value, it is increased to the lower limit, and if it is higher than the upper limit brightness,

The brightness contrast value correction unit 130 may calculate brightness contrast value q in the object region instead of adding the brightness correction amount q as it is in the previous embodiment A value obtained by multiplying a weight given differentially based on the distance from the boundary by the brightness correction amount q may be added to the brightness data of each pixel.

The color model inverse transformer 140 inversely transforms the corrected stereoscopic images of the second color model having the brightness distribution of the adjusted object region and the brightness distribution of the adjusted background region into the corrected stereoscopic images of the first color model.

2 is a flowchart illustrating a stereoscopic image post-processing method according to an embodiment of the present invention.

Referring to FIG. 2, a stereoscopic image post-processing method for a stereoscopic image display apparatus 10 according to an embodiment of the present invention is a stereoscopic image post-processing method in which a stereoscopic image display apparatus 10 displays an object region and a background region In order to generate corrected stereoscopic images in which the brightness contrast value is corrected according to a predetermined reference brightness contrast value, step S21 may be started from the step of distinguishing the object area having a stereoscopic effect from the original stereoscopic images and the background area. The designer can decide empirically whether the object area and the background area should be distinguished based on a certain degree of three-dimensional feeling.

Specifically, according to the embodiment, in step S21, the stereoscopic image display device 10 can distinguish the object area and the background area based on the disparity map of the original stereoscopic images.

According to the embodiment, step S21 is a step in which the stereoscopic image display device 10 converts the original stereoscopic images into grayscale images, and performs a correlation calculation on the blocks in the same position in each of the plurality of gray- Detecting a boundary that separates the object region and the background region according to a correlation value, and determining an object region of the regions divided by the detected boundary.

Next, in step S22, the stereoscopic image display device 10 converts the original stereoscopic images of the first color model into the converted stereoscopic images of the second color model including the brightness component.

In step S23, the stereoscopic image display device 10 superimposes the identified object area and the background area on the converted stereoscopic images of the second color model to obtain the brightness distribution of the object area and the brightness distribution of the background area, respectively , The corrected stereoscopic images of the second color model are generated by adjusting the brightness distribution of the object area and the brightness distribution of the background area so that the brightness contrast values of the object area and the background area are corrected according to the predetermined reference brightness contrast value.

According to the embodiment, the step S23 is a step in which the stereoscopic image display apparatus 10 displays the average of the object area brightness of the pixels belonging to the object area among the converted stereoscopic images of the second color model and the brightness of the background area of the pixels belonging to the background area And calculating a brightness correction amount based on the above-described equations (1) and (2) so as to correct the brightness contrast value before correction calculated as the ratio of the background region brightness average to the object region brightness average before correction to the reference brightness contrast value, Includes the step of generating corrected stereoscopic images of the second color model by, for example, adding the brightness correction amount q to the brightness data of all the pixels in the object area by correcting the object area brightness distribution by the brightness correction amount q can do.

Depending on the embodiment, k may be 30%.

According to an embodiment, the reference brightness contrast value k may be a range having a predetermined lower limit and an upper limit.

The step S23 in the other embodiment is a method in which the three-dimensional image display apparatus 10 displays the brightness correction amount q (t) on the weight value differentially given based on the distance from the boundary in the object region, instead of directly adding the brightness correction amount q To the brightness data of each of the pixels.

In step S24, the stereoscopic image display apparatus 10 displays the corrected stereoscopic images of the second color model having the brightness distribution of the adjusted object area and the brightness distribution of the adjusted background area in the corrected stereoscopic images of the first color model .

In step S25, the stereoscopic image display device 10 formats the corrected stereoscopic images according to a predetermined stereoscopic image display method, and displays the corrected stereoscopic images on the display 14.

FIGS. 3, 4 and 5 illustrate the performance of the stereoscopic image post-processing technique according to an embodiment of the present invention. In FIG. 3, the brightness of the entire image is increased before correction, The left and right stereoscopic images after correcting the brightness contrast value of the object and the background according to the stereoscopic image post-processing method according to the embodiment, respectively.

Referring to FIG. 3, a left image and a right image in which a cylindrical black bottle is standing in front of a somewhat dark background are illustrated. 3 is a state before correction, in which the letters written on the front face of the cylindrical bottle which is the center of the three-dimensional feeling due to the brightness, that is, the brightness is low, are not well distinguished. Also, since the bottle has a uniform lightness as a whole, it looks like a plane, and it is difficult to obtain a feeling of being a cylinder itself. The shape of the reflection of objects around the bottom of the bottle is hardly noticeable.

Referring to FIG. 4, a left image and a right image in the case where the brightness of the whole image is collectively increased are illustrated. In FIG. 4, as the brightness is improved, the letters written on the front face of the cylindrical bottle, which is the center of the three-dimensional feeling, are clearly visible, but the background is also brighter and the overall feeling is different from the original image.

Referring to FIG. 5, left and right images having improved brightness of an object are illustrated according to a stereoscopic image post-processing technique according to an embodiment of the present invention. As the letters on the front of the cylindrical bottle, which is the center of the three-dimensional feeling, are well visible, the visibility is improved and the three-dimensional feeling is improved so that the difference in gradation due to illumination is improved at the bottle lid portion. However, / RTI &gt;

It is to be understood that both the foregoing general description and the following detailed description of the present invention are exemplary and explanatory and are intended to provide further explanation of the invention as claimed. It will be understood that variations and specific embodiments which may occur to those skilled in the art are included within the scope of the present invention.

Further, the apparatus according to the present invention can be implemented as a computer-readable code on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the recording medium include ROM, RAM, optical disk, magnetic tape, floppy disk, hard disk, nonvolatile memory and the like. The computer-readable recording medium may also be distributed over a networked computer system so that computer readable code can be stored and executed in a distributed manner.

10 Stereoscopic Image Display
11 image decoding unit
12 stereoscopic image separation unit
100 stereoscopic image post-processing device
110 Object Background Identification Unit
111 gray scale image conversion unit
112 object boundary detector
113 Object Area Decision Unit
120 color model conversion unit
130 brightness contrast value correction unit
140 color model inverted part
13 Formatter
14 display

Claims (10)

An image decoding unit decoding the source image data encoded by the predetermined moving picture encoding format to reconstruct the stereoscopic image data;
A stereoscopic image separating unit for separating the original stereoscopic images from the restored stereoscopic image data;
A stereoscopic image post-processing device for respectively generating a corrected stereoscopic image in which brightness contrast values of the object area and the background area are corrected according to a predetermined reference brightness contrast value for each of the original stereoscopic images; And
And a formatter for formatting the corrected stereoscopic images generated for each of the original stereoscopic images according to a predetermined stereoscopic image display method and transmitting the formatted stereoscopic images to a display,
Wherein the brightness contrast value is defined as a ratio of a value obtained by increasing an average brightness before correction of the object zone by a brightness correction amount and a value obtained by decreasing an average brightness before correction of the background area by the brightness correction amount. The stereoscopic image post-processing apparatus according to claim 1,
An object background identification unit for distinguishing an object region and a background region having a three-dimensional sense from the original stereoscopic images;
A color model converting unit for converting original stereoscopic images of the first color model into converted stereoscopic images of a second color model including a brightness component;
The identified object region and background region are superimposed on the converted stereoscopic images of the second color model to acquire the brightness distribution of the object region and the brightness distribution of the background region respectively and if the brightness contrast value of the object region and the background region is smaller than a predetermined reference A brightness contrast value correcting unit for generating corrected stereoscopic images of the second color model by respectively adjusting the brightness distribution of the object area and the brightness distribution of the background area so as to be corrected according to the brightness contrast value; And
And a color model inverse transformer for inversely transforming the corrected stereoscopic images of the second color model having the brightness distribution of the adjusted object region into the corrected stereoscopic images of the first color model. The stereoscopic image display apparatus of claim 2, wherein the object background identification unit operates to distinguish the object region and the background region based on a disparity map of the original stereoscopic images. The apparatus according to claim 2, wherein the object background identification unit
A gray scale image converting unit for converting the original stereoscopic images into images of gray scale;
An object boundary detection unit that detects a boundary that separates an object region and a background region according to a correlation value obtained by correlating blocks in the same position in each of a plurality of gray scale images; And
And an object region determining unit for determining an object region among the regions divided by the detected boundary. 2. The image processing apparatus according to claim 2, wherein the first color model in the color model conversion unit is an RGB color model, and the second color model is an HSI color model, an HSL color model, an HSV color model, a YCbCr color model, a YUV color model, And the three-dimensional image display device. A stereoscopic image post-processing apparatus for correcting original stereoscopic images in a stereoscopic image display apparatus to generate corrected stereoscopic images,
An object background identification unit for distinguishing an object region and a background region having a three-dimensional sense from the original stereoscopic images;
A color model converting unit for converting original stereoscopic images of the first color model into converted stereoscopic images of a second color model including a brightness component;
A brightness contrast value correcting unit for respectively generating corrected stereoscopic images of the second color model by adjusting the brightness distribution of the object region and the brightness distribution of the background region with respect to each of the converted stereoscopic images according to a predetermined reference brightness contrast value; And
Converting the corrected stereoscopic images of the second color model having the brightness distribution of the adjusted object region and the brightness distribution of the adjusted background region generated for each of the converted stereoscopic images into the corrected stereoscopic images of the first color model Model inversion section,
Wherein the brightness contrast value is defined as a ratio of a value obtained by increasing an average brightness before correction of the object zone by a brightness correction amount and a value obtained by decreasing an average brightness before correction of the background area by the brightness correction amount. A stereoscopic image post-processing method for correcting original stereoscopic images in a stereoscopic image display device to generate corrected stereoscopic images,
Wherein the stereoscopic image display device comprises:
A step of distinguishing the object region and the background region having a stereoscopic effect from the original stereoscopic images;
Converting original stereoscopic images of the first color model into converted stereoscopic images of a second color model including a brightness component;
Generating corrected stereoscopic images of the second color model by respectively adjusting the brightness distribution of the object area and the brightness distribution of the background area for each of the converted stereoscopic images according to a predetermined reference brightness contrast value; And
Transforming the corrected stereoscopic images of the second color model having the brightness distribution of the adjusted object area generated for each of the converted stereoscopic images into the corrected stereoscopic images of the first color model,
Wherein the brightness contrast value is defined as a ratio of a value obtained by increasing an average brightness before correction of the object zone by a brightness correction amount and a value obtained by decreasing an average brightness before correction of the background area by the brightness correction amount, Way. 8. The method of claim 7, wherein the step of distinguishing the object zone from the background zone comprises:
And separating the object region and the background region based on the disparity map of the original stereoscopic images. 8. The method of claim 7, wherein the step of distinguishing the object zone from the background zone comprises:
Converting the original stereoscopic images into grayscale images;
Detecting a boundary that separates an object region and a background region according to a correlation value obtained by correlating blocks in the same position in each of a plurality of gray scale images; And
And determining an object region among regions divided by the detected boundary. 8. The method of claim 7, wherein in the color model conversion step, the first color model is an RGB color model and the second color model is an HSI color model, an HSL color model, an HSV color model, a YCbCr color model, a YUV color model, Wherein the stereoscopic image post-processing method comprises the steps of:

Images