KR20110038934A - Display calibration apparatus and method thereof for image quality enhancement using categorizing of image and recognition information of human skin - Google Patents

Abstract

PURPOSE: A display calibration apparatus for enhancing image quality by categorizing an image and recognizing the information of a human skin is provided to improve image quality recognized by a user by adopting different emotions to every image category and reproducing a preferable human skin color. CONSTITUTION: A category discrimination unit(100) classifies an image category, and a skin recognition unit(200) recognizes a human skin color in an image. A screen adjustment unit(300) adjusts a screen according to the skin information of the person recognized in the skin recognition unit. In addition, the screen adjustment unit adjusts a screen by using a screen adjustment variable which varies according to the skin information of the recognized person and the classified category.

Description

DISPLAY CALIBRATION APPARATUS AND METHOD THEREOF FOR IMAGE QUALITY ENHANCEMENT USING CATEGORIZING OF IMAGE AND RECOGNITION INFORMATION OF HUMAN SKIN}

The present invention relates to a display adjusting device and a display adjusting method using a category of an image and skin recognition information of a person to improve image quality.

The display serves as a visual bearer of information that the user receives and recognizes with the eyes through the output device of the display. In the research of display devices, thinning, high image quality, and low power and eco-friendliness are the core, and the dual high definition is focused on the development of technology for improving the performance of physical image quality such as resolution to improve image quality. However, the recent improvement in display performance and the development of image quality technology has improved the performance of physical image quality, but there is a limit to the image quality improvement only by improving the physical image quality by excluding the process of recognizing information from the user's perspective.

Among the colors included in the image reproduced on the display device, the human skin color has a high frequency, and the reproduction of the human skin color is an important factor in the image quality performance of the image output device, but the image quality of recognizing and reproducing the human skin color in the image. Improvement methods are not being considered. In addition, the conventional display image quality improvement technology does not consider a method of sufficiently reflecting the sensitivity required by the content in order to provide a picture quality that satisfies the viewer according to various contents of the image, It is designed to adjust the picture quality only, so it is difficult to access. Even if the content is in mind, only 2-3 modes of picture quality are adjusted in a batch so that the user needs to adjust the picture quality and adjust the picture quality directly. There is this.

The present invention has been proposed to solve the above problems of the conventionally proposed methods, by classifying the category of the image and recognizing the skin of the person to adjust the screen, to reflect and prefer different emotions for each category of the image It is an object of the present invention to provide a display adjusting device and a display adjusting method for improving image quality by reproducing skin color and improving image quality perceived by a user, using image category and human skin recognition information.

According to an aspect of the present invention for achieving the above object, a display adjustment device for improving the image quality using the category of the image and human skin recognition information,

(1) a category discrimination unit classifying a category of an image;

(2) a skin recognition unit for recognizing a human skin in the image; And

And (3) a screen adjustment unit for adjusting the screen according to the category classified by the category determination unit and the skin information of the person recognized by the skin recognition unit.

Preferably, the screen adjustment unit,

The screen may be adjusted using a screen adjustment variable that is changed according to the classified category and the recognized skin information of the person.

More preferably, the screen adjustment variable,

It can include Hue parameters, Saturation parameters, and Lightness parameters of the display.

According to another aspect of the present invention for achieving the above object, a display adjustment method for improving the image quality using the category of the image and human skin recognition information,

The adjustment of the screen according to the category of the image and the skin information of the person in the image is characterized by its configuration.

Preferably,

(1) transmitting image information on the category classified by the category determining unit and the skin of the person recognized by the skin recognizing unit to the screen adjusting unit;

(2) adjusting the screen by the screen adjusting unit when the image information is transmitted to the screen adjusting unit; And

(3) if the screen is adjusted by the screen adjustment unit, displaying the adjusted image.

More preferably, adjusting the screen may include:

According to the classified category and the recognized skin information, the screen may be adjusted by adding preset weights to the screen adjustment variables.

Even more preferably, the weight is

A predetermined value may be added to or subtracted from the screen adjustment variable value to improve the image quality according to the category of the image.

Even more preferably, the weight is

A predetermined value may be added to or subtracted from the screen adjustment variable value to improve the image quality according to the skin information of the person in the image.

According to the present invention, according to the display adjustment device and the display adjustment method for improving the image quality using the category of the image and the human skin recognition information, to classify the category of the image and to recognize the human skin of the image to adjust the screen By providing a display adjustment device and a display adjustment method for improving the image quality using category and human skin recognition information, it is effective to improve the image quality recognized by the user by reflecting different emotions for each category of the image and reproducing the preferred skin color of the user. have.

Hereinafter, with reference to the accompanying drawings, an embodiment of a display adjustment device according to the present invention will be described in detail.

FIG. 1 is a diagram schematically illustrating an apparatus for adjusting a display for improving image quality by using a category of an image and skin recognition information of a person, according to an exemplary embodiment. As shown in FIG. 1, a display adjusting apparatus for improving image quality using a category of an image and skin recognition information of a human includes a category determining unit 100 classifying a category of an image and a skin recognizing a human skin in the image. Recognizing unit 200, and the screen classification unit 300 for adjusting the screen according to the category classified by the category determination unit 100 and the skin information of the person recognized by the skin recognition unit 200. In addition, the display controller 400 may display a screen adjusted by the screen controller 300.

The category determining unit 100 classifies a category of the received image. The category determination unit 100 may determine various categories of the image by the category determination unit 100, and then adjust the image quality by the screen adjustment unit 300 to sufficiently reflect the emotions required by the contents to improve the image quality. The category of the image may be classified into news, documentary, affection, war and sports.

The skin recognizing unit 200 recognizes a human skin color in an image. When the human skin color is recognized, the screen adjustment unit 300 may adjust the image quality to improve the skin color, which is an important factor for the image quality performance of the image output device, to a user's preferred color.

As illustrated in FIG. 1, the screen adjustment unit 300 may adjust the screen using a screen adjustment variable that is changed according to the classified category and the recognized skin information of the person. The screen adjusting unit 300 may improve image quality to a screen that the user prefers by sufficiently reflecting emotions that are differently required according to various contents by using screen adjustment variables that change according to the classified category and the recognized skin information of the person. Can be. The screen adjustment variable may include a Hue parameter, a saturation parameter, and a lightness parameter of the display. These parameters are useful as screen adjustment variables because they are independent of the device and the means by which human vision perceives color. On the other hand, in addition to the four screen adjustment parameters may include Gamma, Chroma (Colorfulness), Brightness, and Contrast parameters. In addition, the screen adjustment parameters can be used independently, and several screen adjustment variables can be used together, so that at least two or more can be adjusted at the same time.

Next, an embodiment of the display adjustment method according to the present invention will be described in detail with reference to FIGS. 2 to 6.

2 is a flowchart illustrating a display adjusting method for improving image quality using a category of an image and skin recognition information of a person according to an exemplary embodiment of the present invention. As shown in FIG. 2, the display adjusting method for improving image quality using the category of the image and the skin recognition information of the person adjusts the screen according to the category of the image and the skin information of the person in the image. Regardless of the performance of the display panel, it is possible to provide a user's favorite image by adjusting the screen to an image that is easy to be recognized by the human eye and to the emotion by using the category of the image and the recognized skin color information. The picture quality can be improved.

As shown in FIG. 2, a display adjustment method for improving image quality using a category of an image and skin recognition information of a person according to an exemplary embodiment of the present invention first includes categories and skins classified by the category determination unit 100. In operation S100, the image information regarding the skin of the person recognized by the recognition unit 200 may be transmitted to the screen adjustment unit. The category determining unit 100 classifies the category of the image from the received image, the skin recognition unit 200 recognizes the human skin, and transmits the recognized information to the screen adjusting unit 300, thereby providing category information and skin of the image. Information can be used to improve image quality. In the category determination unit 100, categories of images may be classified by referring to program information of an image, and the like. In the skin recognizing unit 200, a human skin detects a skin color from an image of a received image, The distribution range in the image can be calculated and identified.

Next, as shown in FIG. 2, when the image information is transmitted to the screen adjusting unit, the screen adjusting unit 300 may adjust the screen (S200). When adjusting the screen, the weights of the screen adjustment variables can be set in advance according to the categorized category and the recognized skin information of the screen, so that the screen adjustment parameters can be changed in various ways. can do. Here, the weight may be added to or subtracted from the screen adjustment variable value to improve the image quality according to the category of the image. Since preferences vary according to the categories of images classified as news, documentary, love, war, and sports, as shown in Experiment 1 below, a predetermined value is assigned to a screen adjustment variable value to classify the categories of images and have high preference. In order to increase or decrease the weight, the weight may be set in advance to improve the image quality.

Experimental Example 1

For the purpose of improving the image quality of the display, the subject of each category is presented by presenting 6 images with the image quality adjustment variable to check the effective image quality adjustment variable according to the category. Physiological fatigue was tested.

3 is a diagram illustrating a level at which an image quality adjustment parameter is adjusted for each category according to Experimental Example 1 of the present invention. The experiment method was conducted by three people in their 20s, who were most sensitive to the video, and showed five categories of documentary, love, news, sports, and war as shown in FIG. 3. H (Hue), M (Chroma (Colorfulness)), L (Lightness) and CN The preferences were confirmed by presenting a screen in which the image quality adjustment parameter of (Contrast) was adjusted in five levels.

FIG. 4 is a diagram illustrating image quality adjustment variable preferences according to categories of images according to Experimental Example 1 of the present invention. Particularly, (a), (b), (c), (d), and (e) are documentary and affection, respectively. , The results of the experiment in the news, sports and war categories. As shown in FIG. 4, when the documentary category is at the H_3, M_2, L_3, CN_4 level, the love category is at the H_3, M_3, L_3, CN_2 level, the news category is at the H_3, M_2, L_3, CN_3, sports If the category is H_3, M_3, L_3, CN_4, the war category showed the highest preference when H_4, M_2, L_3, CN_4.

In addition, as shown in FIG. 2, the weight may be added to or subtracted from the screen adjustment variable value to improve the image quality according to the skin information of the person in the image. Among the colors included in the image reproduced on the display device, the human skin color has a high frequency, and since the preference of the human skin color is obvious as in Experiment 2 below, when the skin color of the human in the image is recognized, the skin color has high preference. In order to add or subtract a predetermined value to a screen adjustment variable value, weights may be set in advance to improve image quality.

Experimental Example 2

For the purpose of improving the image quality of the display, in order to effectively reproduce the skin color in the output device of the display, the user's preferred color region for the human skin color was tested. The images used in the experiment were taken with the lkegami HDK-790E HD Camara, and then Autodesk Luster adjusted the color, brightness and saturation of only the face.

FIG. 5 is a diagram illustrating a preferred color gamut of a user's human skin color in order to effectively reproduce the skin color in a display adjustment device for improving image quality using image category and human skin recognition information according to Experimental Example 2 of the present invention. Figures showing the images used, in particular (a), (b) and (c) are images rendered by adjusting the screen adjustment parameters of the Hue parameter, Lightness parameter and Saturation parameter, respectively. The Hue parameter creates Level 1, Level 2, Level 4 and Level 5 by moving Level 3 at a position about 2 degrees clockwise on the 1 axis of the vector SCOPE and moving it 3 degrees clockwise and counterclockwise, respectively. Here, the Hue angle means that the system shifts from red to yellow or yellow to green or green to blue or blue to red in Hue, and gradually goes from the original screen Level 3 to Level 1. It contains a lot of reddish colors, and from level 3 to level 5, it means more yellowish colors. The Lightness parameter adjusts the brightest part of the face in the Waveform Meter to Level 1 (535mV), Level 2 (520mV), Level 3 (510mV), Level 4 (500mV), and Level 5 (490mV). The saturation parameter creates Level 1, Level 2, Level 4, and Level 5 by placing Level 3 on the axis of the axis 1 and increasing the saturation to the extent that the difference is felt.

The test method shows 15 scenes randomly for 30 seconds per subject and examines the suitability evaluation of five adjectives of “beautiful”, “natural”, “comfortable”, “gentle” and “satisfactory” for each scene. The evaluation scale evaluated the image quality between “not at all (1)” to “very so (7)” and the experimental results according to the adjustment of the screen adjustment parameters are shown in FIG. 6.

FIG. 6 is a diagram illustrating an experimental result of a preferred color region of a user's human skin color according to Experimental Example 2 of the present invention. Particularly, (a), (b), and (c) are Hue parameters, Saturation parameters, and Lightness, respectively. It is the result of experiment when adjusting the screen adjustment parameter of the parameter. 6a to 6c, the red line is 'beautiful', yellow line is 'natural', orange line is 'comfortable', green line is 'soft', green line is 'satisfactory' Represent each. As shown in FIG. 6, the experimental results according to Hue parameter adjustment are similar to those of Hue 1, 2 and 3, and the result is higher than Hue 4 and 5, resulting in reddish than Level 4 and 5, which contain many yellowish colors. Level 1, 2, and 3 images, which contain a lot of colors, were preferred. Experimental results of saturation parameter adjustment showed that Sat 2, 3 and 4 were similar and preferred than Sat 1 and 5, so that the preference trend of slightly high saturation level 2 and slightly low saturation level 4 was shown in Default Level 3 image. High saturation and low saturation were not preferred. The experimental results of the lightness parameter adjustment showed that Lig 1 and 2 were similar and had a higher preference than Lig 3, 4 and 5.

As described above, the image display quality on the display device and the human skin color in the image have a favorable preference for image quality, and the image quality of the image display is improved due to the relationship with human color nerves that vary depending on the sensitivity due to the change in color. By classifying the category of the image and recognizing the skin of the person in the image to adjust the screen, it was confirmed that the image quality recognized by the user can be improved.

Finally, when the screen is adjusted by the screen controller 300, the adjusted image may be displayed (S300). In step S300 of displaying the adjusted image, the screen is adjusted based on the category classified in the step S200 and the recognized human skin information. Make the user aware.

As described above, the display adjustment method for improving the image quality using the category of the image and the human skin recognition information according to an embodiment of the present invention, the category classified by the category determiner 100 and the skin recognition unit 200 is recognized In operation S100, when the image information is transmitted to the screen adjusting unit, the screen adjusting unit 300 adjusts the screen (S200) and the screen adjusting unit 300. If the screen is adjusted, the method may include displaying the adjusted image (S300). In this case, after classifying the category of the image and recognizing the skin of the person and transmitting the information to the screen adjusting unit (S100), the screen may be adjusted using both category classification information and the recognized human skin information (S200). In addition, when the human skin of the image is not confirmed after classifying the category of the image, after transmitting the information to the screen adjusting unit (S100), the screen may be adjusted using only the category information (S200), and the screen may be adjusted ( Even after the display (S200) and the display (S300), if the human skin is recognized by the skin recognition unit 200, the screen can be adjusted again (S200) and display (S300).

The present invention described above may be variously modified or applied by those skilled in the art, and the scope of the technical idea according to the present invention should be defined by the following claims.

1 is a diagram schematically illustrating an apparatus for adjusting a display for improving image quality by using a category of an image and skin recognition information of a person according to an exemplary embodiment of the present invention.

2 is a flowchart illustrating a display adjustment method for improving image quality using a category of an image and skin recognition information of a person according to an exemplary embodiment of the present invention.

3 is a view showing a level of adjusting the image quality adjustment variable for each category according to Experimental Example 1 of the present invention.

4 is a diagram illustrating image quality adjustment variable preferences according to categories of images according to Experimental Example 1 of the present invention.

5 is a view showing an image used in the experiment of the preferred color region for the human skin color of the user in order to effectively reproduce the skin color according to Experimental Example 2 of the present invention.

6 is a view showing the experimental results of the preferred color region for the human skin color of the user according to Experimental Example 2 of the present invention.

<Explanation of symbols for main parts of the drawings>

100: category determination unit 200: skin recognition unit

300: screen adjustment unit 400: display unit

Claims (8)

In the display adjustment device for improving the image quality using the category of the image and the human skin recognition information, (1) a category discrimination unit classifying a category of an image; (2) a skin recognition unit for recognizing a human skin in the image; And (3) a screen adjusting unit for adjusting a screen according to a category classified by the category determining unit and skin information of a person recognized by the skin recognizing unit; Display adjustment apparatus for improving the image quality using a category of the image and the human skin recognition information, characterized in that it comprises a. The display device of claim 1, wherein the screen adjustment unit comprises: And adjusting the screen by using a screen adjustment variable which is changed according to the classified category and the recognized skin information of the person. The method of claim 2, wherein the screen adjustment variable, A display adjustment device for improving image quality using a category of an image and human skin recognition information, comprising a Hue parameter, a Saturation parameter, a Lightness parameter, and a Gamma parameter of a display. In the display adjustment method for improving the image quality using the category of the image and the human skin recognition information, And adjusting the screen according to a category of an image and skin information of a person in the image. The method of claim 4, wherein (1) transmitting image information on the category classified by the category determining unit and the skin of the person recognized by the skin recognizing unit to the screen adjusting unit; (2) adjusting the screen by the screen adjusting unit when the image information is transmitted to the screen adjusting unit; And And (3) displaying the adjusted image when the screen is adjusted by the screen adjustment unit. The display adjustment method of claim 1, further comprising displaying the adjusted image. The method of claim 5, wherein adjusting the screen comprises: And adjusting the screen by adding a predetermined weight to the screen adjustment variable according to the classified category and the recognized skin information, respectively. The method of claim 6, wherein the weight is, A display adjustment method for improving image quality by using a category of an image and skin recognition information of a human, characterized by adding or subtracting a predetermined value to a screen adjustment variable value so as to improve the image quality according to the category of the image. The method of claim 6, wherein the weight is, And a predetermined value is added to or subtracted from a screen adjustment variable value so as to improve image quality according to skin information of a person in the image.

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