KR20130043033A - Correction method of image color using touch screen - Google Patents

Abstract

PURPOSE: A color correction method of an image using a touch screen is provided to guarantee temporal and spatial efficiency for the motion of a hand by controlling color correction with one motion. CONSTITUTION: A touch screen is waited during set time until sensing touch in a location(S20). The touch screen checks the motion of a finger in set time(S30). The touch screen changes a change location for the finger into a selected point coordinate. The touch screen stores a change location coordinate value in a cache(S51). The touch screen calculates a color correction variable by using an original application(S60). The touch screen stores the color attribute value of the image in the cache by correcting the color attribute value of an image(S70,S80). [Reference numerals] (AA) Start; (BB,DD) No; (CC,EE,FF) Yes; (GG) End; (S10) Setting/changing a correction mode; (S20) Waiting; (S30) Is a finger contact detected?; (S40) Is the motion of a finger detected in a set time?; (S50) Changing the changed location coordinate of a finger; (S51) Storing changed location coordinate(Pn) cache; (S60) Calculating a color correction variable; (S70) Correcting the color attribute of an image; (S71) Displaying the corrected image; (S80) Storing the corrected color attribute value cache;

Description

Correction method of image color using touch screen}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for color correction of an image in a digital device, and in particular, by using a touch screen of a digital device used in photographic and imaging equipment, a 3-way color correction method or a slide used in a conventional color correction control device. The present invention relates to a method of color correction of a new image, which avoids the method and reduces the number of adjustments for color correction of the image by using hand movements and moving lines. In addition, the present invention relates to a color correction method of an image using a touch screen that can be implemented by a user-centered interface method to more intuitively adjust color correction to check the result.

Traditional color correction methods can be classified into HSL, RGB, and BGC methods.

At this time, the HSL method is a method of correcting color by separately analyzing each of the colors (Hue, H), saturation (S), and lightness (L) based on three attributes of color. The RGB method is a color correction method developed based on the color space that holds color information, and independently adjusts Red, R, Green, G, and Blue. That's the way it is. It's a technique commonly used to implement color in monitors. Finally, the BGC method is a traditional method used to adjust color in TV CRTs. The BGC method is a method of compensating color using brightness (B), gamma (G), and contrast (C). It has the characteristic that the user can easily adjust the color of the CRT simply by using the terminology.

Referring to FIG. 6A in detail, the abbreviation of the BGC scheme means Brightness-Gamma-Contrast. In other words, it is the color correction method of the traditional TV CRT that adjusts dark areas, mid-brightness areas and highlight areas. The BGC method is to correct colors according to the tonal range. The previous RGB method explained that the amount of change in the color space axis is the fundamental difference between the RGB method and the BGC method. The RGB method is a change in space, while the BGC method is a change in a line. Referring to the difference between the two methods with reference to Fig. 6a (a), the change in one line is the diagonal line shown in the right figure. The figure on the right is a curve showing the input / output relationship of the histogram. The histogram is discussed in more detail later. It darkens to the left and down at the input of the X axis and the output of the Y axis. One gray line is displayed because grayscale tones indicate input / output relations. As a result, by adjusting the input and output relationship indicated by the diagonal line, it is possible to change the output value for the input value to adjust the color. As described above, the shape of the oblique line is adjusted by using the Brightness-Gamma-Contrast button according to the tone range, and each function is illustrated in FIG. 6G (b). Combining the functions of B, G, and C will freely create the shape of the curve. As a result, the relationship between input and output can be created in the form desired by the user.

First, adjusting Brightness affects the entire output value for the input. Adjusting the gamma adjusts the mid-brightness area with the convex shape downwards or upwards. Finally, the contrast can control the entire area. However, even if brightness control affects the entire area, there is a separate function that can adjust the other two areas, so it is actually used to affect only the dark area. As a result, the BGC method is understood as a method of inducing a relative change in the input value and the output value by changing the shape of the diagonal line representing the input / output relationship.

In addition, in order to precisely correct color, each conventional color correction method is divided into a dark region (Shadow, S), a mid-brightness region (Mid-Ton, M), and a bright region (Highlight, H). If the area to be corrected is not selected separately according to the tone (brightness), the entire area (Master, M) is automatically applied. Since the human visual perception ability does not respond evenly to each area, it is more efficient in terms of color correction to adjust it really according to the brightness according to the brightness. In that sense, it is more efficient in terms of color correction. In that sense, color correction for each region can be said to be essential. This is summarized in Table 1 below.

Meanwhile, advances in computer technology have caused many changes in terms of color correction of photographs and images. First of all, the above-mentioned various methods were provided in an environment in which various methods can be used in a real computer environment. An environment was provided in which the color-property method, the method used to reproduce color on the monitor, and the method of the traditional TV CRT were all selected. However, since color reproduction in the computer environment has evolved with the time of using the mouse as an interface, the method of the color correction controller has naturally developed to be limited to the principle and method of using the mouse.

In such a digital environment, a color correction method of a conventional image (photo and video) or a user interface following the same includes: 1. SLIDE BARS UI, 2. COLOR WHEELS UI, 3. COLOR PICKER (COLOR PICKER UI), 4. CURVE UI.

The conventional image color correction method and the user interface according thereto will be described with reference to the drawings.

1. Slide Bar Format (SLIDE BARS UI)

The slide bar format is a representative user interface format used for color correction of photographs and images in a digital environment. As shown in FIG. 6A, each slide bar operates independently to adjust HSL, Hue, Saturation, and Lightness. In practice, at least three movements are required to adjust the color. In addition, there is an inconvenience in that the degree to be adjusted through the actual mouse is compared with the displayed image (picture, image) and the change is confirmed.

2. Color Wheel Method (COLOR WHEELS UI)

The color wheel method uses a vector. A vector is one that determines its value through direction and distance. Therefore, by moving the reference point, which is the initial value of the color wheel, to a specific position, the new color value is changed by the direction and distance that is newly generated. The attribute of the color controlled through the color wheel is determined by the direction of movement (Hue) and the distance traveled saturation (Saturation). 6B is a view of a representative color wheel. The initial value is shown before the left side changes, and the right side shows the color and saturation by moving the center point.

Although the above method can adjust two attributes (hue and saturation) through one movement, it does not control all three attributes (hue, saturation, brightness) that need to be adjusted to correct the color at once. Since there are three color attributes, one additional element requires another movement. That is, the vertical bar at the far right of the screen which still displays brightness does not change, and there is a problem in that it is controlled by a separate operation. In the figure of FIG. 6B, it can be seen that the rightmost vertical bar of the screen which still displays brightness does not change.

3. COLOR PICKER UI

Referring to the figure of FIG. 6C, the color picker method is a method of 'picking up' color. That is, the user directly selects a desired color on the screen. For more sophisticated color selection, you can enter the detail value numerically. Unlike the method described above, the color picker method is more similar to the function of selecting a color when drawing a picture than the function of adjusting color. Therefore, it is not frequently used in the color correction framework of an actual image.

One of the advantages of the color picker is that it can be used in various modes, and there are several radio buttons (button-like buttons) shown on the right side of the screen of FIG. 6C. For example, if you want to select a color-related method of Hue, select the radio button 'H'. This will cause the outer square picker window to change to color mode. For a specific selection method, first, the radio button H (Hue, color) is clicked to switch to the color scheme. Then adjust the vertical bar in the center of the screen to select the desired color from the color spectrum. Then, the corresponding color is displayed on the left screen and you can select the saturation (S) and brightness (L) of the desired color by clicking on the screen. Based on the color, you choose the saturation and brightness accordingly.

Referring to the upper figure of FIG. 6C, among the radio buttons on the right, RGB, CMYK, or Lab selection buttons in addition to H, S, and B may be seen. Each concept is more easily understood through the following diagram. The representative RGB color space will be described. The lower figure of FIG. 6C is called an RGB color space. In the digital environment, all color reproductions exist as numerical values, and these numerical values have a range between three-dimensional light as shown in FIG. 6D. When referred to as RGB or Lab, each constitutes a three-dimensional space with R, G, B, or L, a, b as the axes. In this space, the colors of photos or images exist with one color coordinate value. In the color picker mode, one radio button means one axis so that other elements can be adjusted based on the axis. That is, the 3D stereoscopic color space is used in the space of the 2D plane.

However, even in the color picker method, the user must select the desired color every time and adjust the value again. In terms of finding a color to be corrected by clicking several times, the method is different from the previous method and has the same problem.

4. CURVE UI

The curve method was not originally designed for color correction. When the TV CRT was first invented, it provided a function to induce better image quality by adjusting the screen to a user's environment for poor image quality problems. The concept of a curve is easily explained through the figure of FIG. 6E. Not only a TV CRT but also one image reproduced on a computer monitor exists as shown in FIG. 6E.

However, every curve adds several points to fine tune the color, and in the end, the user interface requires multiple clicks to adjust, just like the ones listed earlier. You will see a black image that looks like a ridge in the middle of the figure of FIG. 6E. This classifies the amount of physical data recorded in an image according to the brightness.

The concept is a bit difficult, for example, imagine a black and white photo recorded as a file on your computer. The light and dark parts of the black-and-white photo that exist in the file are all recorded digitally, with the darkest part being 0, the brightest part being 255, and the medium brightness being approximately 127. do. The height of the value itself is not important. The brightness is specified by that number only (for 8-bit images). Therefore, the brightness information of the corresponding picture is displayed in black and white tones starting from 0 on the left and 255 on the right.

The brightness information of each photographic image existing as a pixel indicates the total amount distributed in a bar graph according to the tone (tone, brightness) from 0 to 255. As a result, the vertical Y-axis of the screen represents the sum of pixels with the same brightness distributed in one image, and the horizontal X-axis shows the bar graph continuously because it is a defined brightness value. If it is a color picture, the three R, G, and B channels are each displayed in a single grayscale and are superimposed on one integrated screen. Thus, the same format as that of the single channel of the black and white picture is shown in Figure 6e. What is displayed in this way is called 'histogram' in jargon.

The reason why the histogram is explained is that the curve is corrected by using the amount of distribution of each pixel brightness (tone and gradation) displayed on the histogram. That is, the physical information amount of the histogram is displayed as an output relation to an input. The X-axis of the curve is histogram information input, and the Y-axis of the curve is histogram information to be output. Color correction through curves is a way to change this relationship.

6E is a representative view of the curve system. You will see a bar with gray levels on the X and Y axes. As described above, since the X-axis becomes input histogram information and the Y-axis becomes output information therefor, each side includes gray scales. Since the curve method is the same as the histogram method, the left side becomes a dark area and the right side becomes a light area. The left side of the figure of FIG. 6E is a case where the relationship between the input and the output is 1: 1 linear, and the right side of the figure changes the output information of the input. The relationship can be changed by adding a control point as shown in FIG. 6E. The curve method is not only diagonal but there is also a curve method that adjusts to a horizontal line as shown in FIG. 6F.

As such, the conventional color correction scheme or interface has been used for a long time, thereby ensuring its accuracy and precision. However, it is impossible to define it as a good method unconditionally because of its high accuracy and precision. Because modern computers are small and light. Rather, the traditional color correction method used to improve accuracy and precision may be more inconvenient on a small display screen that is easy to carry. Unlike mouse clicks, of course, many of today's devices are designed to allow for various forms of recognition. These changes are rapidly intensifying their influence as trends. In other words, input devices have reached a new era of paradigm shift.

Therefore, unlike conventional methods based on keypads or touch pads, a new concept of color correction method which reduces unnecessary repetitive operation of the user and can correct color in one continuous operation in an intuitive and easy manner of the user, There is an urgent need for the development of interfaces that follow this.

Accordingly, the present invention has been made to solve the above problems, reducing unnecessary repetitive operation of the user, and provides an interface suitable for a mobile environment having a size and characteristics different from the existing computer environment to provide a color in one continuous operation. An object of the present invention is to provide a color correction method of an image using a touch screen capable of correction.

Another object of the present invention is a mobile environment is a device having a personal tendency, unlike the existing computer environment, the touch to enable color correction in an intuitive and easy way according to the mobile environment device for the user to use anytime, anywhere The present invention provides a method for correcting color of an image using a screen.

A feature of the color correction method of an image using a touch screen according to the present invention for achieving the above object is (A) when the correction mode is selected by the user, three planes that are predefined on the surface of the touch panel Displaying a reference position coordinate having a point coordinate and a central position coordinate positioned at the center of a coordinate inside the circle consisting of the three point coordinates, and (B) when detecting a contact at one of the three point coordinates. Waiting until or for a preset time; (C) if a contact is detected at one of the three point coordinates, checking whether there is a finger movement within a set time, and (D) the check result If the finger movement is detected within the set time, the selected point coordinates are converted to the changed position of the finger, Storing the coordinate values in a cache, and (E) calculating a color correction variable using a circular application, using the current position coordinates, the previous position coordinate values stored in the cache, and the current and immediately set center position coordinate values, respectively. And correcting the color attribute values of the allocated image accordingly, and (F) storing the color attribute values of the corrected image in a cache, wherein the prototype application in step (E) is The calculation method of the used color correction variable calculates the center change distance between the previous center position coordinate and the current center position coordinate and the area ratio between the previous circle and the current circle, and then calculates an average rotation value between the previous circle and the current circle, Center change distance, area ratio between circles and average, which are variables necessary for color correction of image by defined reference position coordinate and center position coordinate Obtaining a rotation value, and correcting a color of the image by changing a color attribute value of the image based on at least one of the acquired color correction variable, the center change distance, the area ratio between the circles, and the average rotation value. It is.

Preferably, the step (F) further comprises the step of displaying the image corrected with the color attribute value of the image corrected in the step (E) so as to be confirmed on the display.

Preferably, the center change distance between the position coordinates is changed by applying the change of the center of gravity point using the center of gravity point principle by changing the position of the center of gravity by changing at least one of the position coordinates of the three color attribute values, The three attribute values are changed together by the attribute value.

Another feature of the color correction method of the image using the touch screen according to the present invention for achieving the above object is (a) three planes that are predefined on the surface of the touch panel when the correction mode is selected by the user Displaying a reference position coordinate having a point coordinate of an image and a center position coordinate positioned at the center of a coordinate inside the triangle composed of the three point coordinates, and (b) detecting a contact at a position of one of the three point coordinates. Waiting until or for a preset time; (c) if a contact is detected at one of the three point coordinates, checking whether there is a finger movement within a set time, and (d) checking As a result, if the movement of the finger is detected within the set time, the selected point coordinates are converted into the changed position with respect to the finger, Storing the calculated position coordinate values in the cache, and (e) using the triangular application as a color correction variable using the current position coordinates, the previous position coordinate values stored in the cache, and the center position coordinate values set at the current and previous positions, respectively. And correcting the color attribute values of the allocated image according to the calculation, and (f) storing the corrected color attribute values of the image in a cache, wherein the triangle in the step (e) The calculation method of the color correction variable using the application calculates the center change distance between the previous center position coordinate and the current center position coordinate and the area ratio between the previous triangle and the current triangle, and then calculates the average rotation value between the previous triangle and the current triangle, Center change distance and triangle, which are variables required for color correction of an image by the predefined reference position coordinates and the center position coordinates Obtaining a color of the image by changing a color attribute value of the image based on at least one of the area ratio of the area and the average rotation value, and the at least one of the obtained center change distance, the area ratio between the triangles, and the average rotation value. And calibrating.

Preferably, the step (f) further comprises the step of displaying the image corrected by the color attribute value of the image to be corrected in the step (e) so that it can be confirmed on the display.

Preferably, the correction of the color attribute value of the image is characterized in that the red, green, and blue values of the image are changed in proportion to the center change distance between the position coordinates for the three coordinate points. do.

Preferably, the center change distance between the position coordinates is changed by applying the change of the center of gravity point using the center of gravity point principle by changing the position of the center of gravity by changing at least one of the position coordinates of the three color attribute values, The three attribute values are changed together by the attribute value.

Another feature of the color correction method of the image using the touch screen according to the present invention for achieving the above object is (1) when the correction mode is selected by the user, three predefined in the surface of the touch panel Displaying a reference position coordinate having point coordinates on a plane and a center position coordinate positioned at the center of a coordinate inside or outside of the three point coordinates, and (2) contacting one of the three point coordinates. (3) if a contact is detected at one of the three point coordinates, checking whether there is a finger movement within a set time; and (4) As a result of the check, if the movement of the finger is detected within the set time, the selected point coordinate is changed to the changed position with respect to the finger. And storing the changed position coordinate values in the cache, and (5) using the current position coordinates, the previous position coordinate values stored in the cache, and the central position coordinate values set at the current and previous positions, respectively. Calculating a color attribute value of the assigned image according to the operation, and (6) storing the color attribute value of the corrected image in the cache, wherein, in the step (5) The calculation method of the color correction variable using the linear application of calculates the vertical component distance of the immediate distance between the position coordinate and the center position coordinate at the previous time point, and then the vertical component distance of the current distance between the current position coordinate and the current center position coordinate. Calculate the vertical component distance from the center position coordinate with respect to the finger at the current time point and the previous time point. And obtaining a vertical component distance ratio with respect to and correcting the color of the image by changing a color attribute value of the image based on the obtained vertical component distance ratio.

Preferably, the step (6) further comprises the step of displaying the image corrected by the color attribute value of the image corrected in the step (5) so that it can be confirmed on the display.

Preferably, the correction of the color attribute values of the image is based on the ratio of the center distance between the position coordinates and these vertical and horizontal component distance ratios for the three coordinate points, the brightness value, gamma value and contrast ( Contrast) is characterized in that each change.

The color correction method of the image using the touch screen according to the present invention as described above has the following effects.

First, there is an effect that the color correction can be adjusted with only one movement of the color correction, which had to be adjusted in a circular manner by repeating each color correction adjusting device individually.

Second, it is possible to guarantee the maximum spatial and spatial efficiency of the hand movement by providing an interface suitable for a mobile environment having a different size and characteristic from the movement of the hand which has been moved for color correction in the existing computer environment.

Third, the process that had to be checked by alternating the adjustment device and the image to correct the color can be drastically reduced to the process of confirming only the applied effect through the monitor, resulting in an intuitive interface form. To maximize its effectiveness and development potential.

Specifically, according to the present invention, it is possible to change the Hue, Saturation, and Lightness values of the image by one continuous operation with the user's intuition while reducing unnecessary repetitive motions of the user. Color correction of an image can be easily performed, and various user interfaces of circular, triangle, and linear for color correction can be implemented.

According to another aspect of the present invention, it is possible to change the red, green, and blue values of an image, respectively, with the user's intuition and one continuous operation, while reducing unnecessary repetitive motions of the user. The color correction of the image can be easily performed, and various user interfaces of a circle, a triangle, and a linear for color correction can be implemented.

According to the present invention of another measurement, it is possible to change the brightness, gamma and contrast values of an image in a user's intuition and one continuous operation while reducing unnecessary repetitive motions of the user. As a result, the image can be easily color corrected, and various user interfaces of a circle, a triangle, and a linear for color correction can be implemented.

Furthermore, according to the present invention, since various color correction parameters are generated in one operation, not only two or a combination of various user interfaces of circular, triangular, and linear type, but also one interface method according to the user's setting It is possible to implement various color correction interfaces, such as a combination of parts.

1A is a diagram for explaining a basic concept of a color correction method of an image according to an embodiment of the present invention.
1B is a diagram illustrating a method of setting an exemplary average rotation value by a method according to an embodiment of the present invention.
2 is a flowchart illustrating a color correction method of an image using a touch screen according to an embodiment of the present invention.
3A to 3D are diagrams for explaining a color correction method of an image using a circular application according to an embodiment of the present invention.
4A to 4B are views for explaining a color correction method of an image using a triangular application according to an embodiment of the present invention.
5A to 5B are views for explaining a color correction method of an image using a linear application according to an embodiment of the present invention.
6A to 6G illustrate the background of the present invention.

Other objects, features and advantages of the present invention will become apparent from the detailed description of the embodiments with reference to the accompanying drawings.

A preferred embodiment of the color correction method of an image using a touch screen according to the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. It is provided to let you know. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely the most preferred embodiments of the present invention and are not intended to represent all of the technical ideas of the present invention. Therefore, various equivalents It should be understood that water and variations may be present.

1 to 7 are views for explaining a color correction method of an image using a touch screen according to an embodiment of the present invention.

As described above, there are HSL method using three attributes of conventional colors, RGB method of three-dimensional color space, and BGC method considering input / output characteristics for color correction, and each method required for color correction in any application. The fundamental elements of every change do not change.

1 is a view for explaining the basic concept of an embodiment of a color correction method according to the present invention.

Referring to FIG. 1, when a request for color correction is generated by a user, three points corresponding to three attributes of colors and a center point of the three points are previously defined on the touch panel. In this case, the three points formed are formed of any one of a circle, a triangle, and a linear shape according to the application.

Then, the position information of the finger touched on the touch panel, that is, the amount of change in the position of the finger whose position coordinate is changed according to the movement of the finger on the surface of the touch panel from the position coordinates, may be used as a parameter for color correction ( The color correction of the image is performed by changing each color attribute value of the image using the color correction variable).

That is, based on the position coordinates obtained by converting the input coordinates of the finger on the surface of the touch panel with respect to the position of the finger to be changed according to the finger movement on the surface of the touch panel. The coordinates of the center position of the inside or outside of a specific shape (circular, triangular, linear) that is deformed according to the movement of the formed finger are changed, and the distance between the center position coordinate and the center position coordinate value (center change) Distance), the area ratio between figures, the average rotation value between figures, the amount of distance change (distance ratio) between the position coordinate and the center position coordinate, the amount of change in the vertical or horizontal component distance between the position coordinates from the center position coordinate with respect to the finger (vertical component) Distance ratio or horizontal component distance ratio) and calculate the color correction parameters in advance. Hue, Saturation, Lightness value, Red, Green, Blue value, or Brightness of the image, which is the color attribute of the assigned image ), Color correction is performed by changing the gamma and contrast values.

First, a description will be given of a method of acquiring information used in an embodiment of the present invention, an arithmetic method, and an embodiment and display in the drawings.

The reference position coordinate Pn predefined on the surface of the touch panel consists of point coordinates [(X1n, Y1n), (X2n, Y2n), (X3n, Y3n)] and three point coordinates on three planes. It is defined as the center position coordinate (Cn) located at the coordinate center of the inside or outside of the figure. Therefore, the first reference position coordinate (Pn) and the center position coordinate when the reference center point of the figure is fixed and set on the interface when requesting the color correction operation of the image (set or change the fixed mode to be described later). The (C ₀ ) value has a value already set regardless of the position coordinate of the first finger, and the user starts the color correction operation based on the reference center point corresponding to the position coordinate of the first center position coordinate (C ₀ ). Done.

In the color correction operation, the reference position coordinate is changed according to the movement of the finger while maintaining the same ratio according to the movement of the finger touching one point among the reference position coordinates Pn having the three point coordinates. And with this, the center position coordinate Cn located in the center of three point coordinates Pn will also change naturally. N represents position coordinates that are changed n times according to the movement of a finger. The change distance of the position coordinate may be calculated by a known mathematical method based on the distance between the current reference position coordinate Pn and the previous reference position coordinate Pn-1.

The changed reference position coordinate Pn identifies three point coordinates that are changed by detecting a finger movement and sets the changed three point coordinates as a new reference position coordinate Pn.

In addition, the center position coordinate Cn is an internal or external coordinate of a figure consisting of point coordinates [(X1n, Y1n), (X2n, Y2n), (X3n, Y3n) on three planes of the reference position coordinate Pn. With (CXn, CYn), you can use one set by user's preset among center of gravity, depth, inner, outer or center of the figure, and coordinates on three planes ((X1n, Y1n), (X2n, Y2n) , (X3n, Y3n)] is calculated by a known mathematical method. In this case, the center of gravity that the user can intuitively grasp as the center of the figure is preferable.

Based on the changed reference position coordinates (Pn) and the center position coordinates (Cn) to calculate and set the center change distance, the area ratio of the figure, the average rotation value, the center change distance, the area ratio of the figure, the average rotation value Color correction of the image is performed by using.

In this case, the center change distance may be calculated by a known mathematical method as a distance between the current center position coordinate Cn and the immediately preceding center position coordinate Cn-1. According to an exemplary embodiment, the distance between the current center position coordinate Cn and the center position coordinate of the figure formed by the reference position coordinate P ₀ may be set and calculated, and may be calculated when the reference center point of the figure is fixed. In an example, the distance between the current center position coordinate Cn and the set center position coordinate corresponding to the fixed center point may be set and calculated.

And the area ratio of the figure is the area ratio between the area of the figure formed by the coordinates of the three planes of the current position coordinates (Pn) and the area of the previous figure formed by the coordinates of three planes of the previous position coordinates (Pn-1) In this case, the current figure area may be calculated by the ratio of the previous figure area or the ratio of the previous figure area to the current figure area. According to an embodiment, it may be calculated as the ratio of the area of the current figure to the area of the figure formed by the reference position coordinates P ₀ .

In addition, the average rotation value is a rotation ratio of the immediately preceding triangle formed of three plane coordinates of the position coordinate Pn-1 immediately before a new figure formed of three plane coordinates of the current position coordinate Pn, According to the user's inclination and work type, it is desirable to implement to be set and calculated by the user in various ways that can intuitively rotate the figure and the color correction effect accordingly. According to the exemplary embodiment, the rate of change of the average value of the three angles formed by the straight line between the center position coordinate and each position coordinate with the horizontal line (X axis) or the vertical line (Y axis) may be set as the average rotation value. The rate of change of the largest value or the rate of change of the largest value of change may be set as the average rotation value.

FIG. 1B is a view for explaining the movement of the center position coordinates or the change in the area or shape of a figure according to a user's disposition and work type. In this case, in order to facilitate the description in FIG. 1B, only the triangle-shaped figure will be described. However, this is for ease of description, it should be noted that all shapes of various shapes are applicable, and the figures do not limit the triangle.

As shown in Fig. 1B (a), when the movement of the center position coordinates or the change of the area or shape of the triangle is small according to the user's inclination and work type, the angle of rotation of the straight line between the three coordinates and the center point will be approximated. Therefore, the rate of change of the angle between the straight line and the horizontal line (X axis) or the vertical line (Y axis) between any one coordinate and the center point can be set as the average rotation value.

In the case of FIG. 1B (B) (D) (D), when the triangle is mainly rotated about one coordinate (one point) among three plane coordinates according to the user's disposition and work type, the coordinate The average rotation rate of the rotation amount of the coordinate (point) at the furthest distance from the point, that is, the change rate of the angle between the coordinate (point) and the center position coordinate (point) and the horizontal line (X axis) or the vertical line (Y axis). Setting to a value may be a preferred form to allow the user to intuitively observe the rotation of the triangle and thus the color correction effect.

The vertical component distance ratio or horizontal component distance ratio between the position coordinate Pn and the center position coordinate Cn is the three vertical or horizontal component distances between the three plane coordinates of the new position coordinate Pn and the center position coordinate, respectively. Three ratio values of the vertical or horizontal component distances between the coordinates on the three immediately preceding planes and the immediate central position coordinates, can be obtained by using known mathematical methods, either directly from the position coordinate values or from the distance between the position coordinates and the center position coordinates. It is calculated.

Hereinafter, a circular application color correction method and a triangular application color correction method in which a representative embodiment of the color correction method of an image using a touch screen according to the present invention can be implemented as a color correction method of an image in connection with color correction elements. Finally, the linear application color correction method will be described with reference to the drawings.

1st Example

2 is a flowchart illustrating a color correction method of an image using a touch screen according to an embodiment of the present invention. In the first embodiment, an image color correction method is applied to a circular application by applying an HSL method for correcting color by separately interpreting each of hue (Hue, H), saturation (S), and lightness (L). Explain. However, this is one embodiment for description, and the RGB method and the BGC method may be applied using the same method.

Referring to FIG. 2, first, when a user selects and sets an HSL correction mode at a start stage, as shown in FIG. 3A, point coordinates (1, 2, 3) on three planes are defined on the surface of the touch panel. The reference position coordinate Pn having the position? And the center position coordinate Cn positioned at the coordinate center 4 inside the circle composed of these three point coordinates are displayed (S10).

In operation S20, the controller detects contact at one of three point coordinates 1, 2, and 3 displayed on the touch panel or waits for a preset time (S20).

If a contact is detected at one of the three point coordinates (1, 2, 3) (S30), it is checked whether there is a finger movement within a set time (S40).

As a result of the check (S40), when the movement of the finger is detected within the set time, the selected point coordinates are converted into the changed position with respect to the finger, and the changed position coordinate value is stored in the cache (S50). At the same time, using the current position coordinates (Pn) and the previous position coordinate values (Pn-1) stored in the cache and the set center position coordinate values (Cn and Cn-1), the color correction variables are calculated using a circular application. (S60), thereby correcting the color attribute values of the allocated image (S70). Then, the corrected image is displayed (S71). In addition, the color attribute value of the corrected image is stored in the cache (S70). In addition, when the movement of the finger within the set time is continuously detected, the color correction operation below the change position coordinate transformation is continuously performed.

In this case, the calculation method of the color correction parameter using the prototype application in step S60 will be described in more detail as follows.

First, by calculating the center change distance between the previous center position coordinates and the current center position coordinates and the area ratio between the previous circle and the current circle, and then calculating the average rotation value between the previous circle and the current circle, the predefined reference position coordinates ( The center change distance, the area ratio between the circles, and the average rotation value, which are variables necessary for HSL color correction of the image by Pn) and the center position coordinate Cn, are calculated and obtained.

Thus obtained, the center correction distance, the area ratio between the circles, and the average rotation values, which are the color correction variables, are changed by changing the Hue, Saturation, and Lightness values of the image, as set by the user. Color correction of the image is performed.

Preferably, the image is displayed in such a manner that the corrected contents can be checked on the display, and the image of the color corrected by the user's selection or a preset condition is stored and finished.

In the above embodiment, it is the user's setting whether the center correction distance, the circular area ratio, and the average rotation value, which are color correction variables, are assigned to the image's Hue, Saturation, and Lightness values. Can be decided by.

According to the exemplary embodiment, the color value of the image is changed in proportion to the center change distance between the position coordinates, the saturation value of the image is changed in proportion to the circular area ratio, and the lightness value is proportional to the average rotation value. It is desirable to change this. It is preferable to set the center to the center position coordinates of the circle as the center of gravity of the circle.

At this time, the color (Hue) manipulation and extraction of the change value is a center of gravity (4) that is moved in four directions up, down, left and right by using the 'move' action of the natural hand method of the circular center point (4) as shown in FIG. When the color value is extracted, the Hue element means the color defined as the direction (direction) from the point of view of the Yin and Yang Five Elements of the Orient, and the meaning of the color in the color spectrum and the color wheel also means Direction, and eventually, changing the color value of the image in proportion to the center change distance between the position coordinates, reflecting the movement of the hand of the natural hand method, concludes that it is an action faithful to the original meaning of the color element. It is based on having.

In addition, saturation manipulation and change value extraction indicate saturation, which means saturation, how well the color is 'settled' in a dictionary meaning, which is not easily understood, is it pure or muddy, or It is easy to understand if the colors are agglomerated or scattered, and the saturation value is determined according to how far from the central white point in the actual CIE xy standard color space, and the agglomeration and scattering or distance from the center point. Considering the natural hand method, the following behavior can be easily recalled, and as shown in FIG. 3C, one of the coordinates of one of the three plane coordinates (1, 2, 3) of the natural hand method of ' To determine the area of the circle created by the 'move' action, so that the saturation value of the image changes in proportion to the area ratio of the circle. The evidence also that it is desirable to implement point. At this time, it can be seen that the center point 4 of the circle changes together as the area of the circle changes. This provides the effect of presenting the ideal color (H) according to the change of the saturation (S) using the center of gravity principle. Accordingly, the color correction, which previously had to be adjusted individually and repeatedly, can be effectively adjusted with only one movement.

Furthermore, lightness manipulation and change value extraction are lightness, that is, the last element of the HSL method. As is well known, color is the result of light's wavelength, and since light's life is brightness, we can infer that brightness represents color's vitality. When you think of a nob, turning something off, turning it off, or turning down or making the audio louder, what you do is controlling its driving force. The same principle is used in the natural hand method, and in order to adjust the lightness element representing the vitality of the color, as shown in FIG. 3D, the rotating action is performed. Turn the circle clockwise or reverse direction to adjust the brightness. At this time, turn the clockwise direction to increase the brightness, and turn it to the reverse direction to decrease the brightness.

Second Example

2 is a flowchart illustrating a color correction method of an image using a touch screen according to an embodiment of the present invention. In the second embodiment, an image color correction method will be described by applying an RGB method of correcting color by analyzing red, green, and blue individually, to a triangular application. However, this is one embodiment for the description, it is possible to apply the HSL method, BGC method using the same method.

Referring to FIG. 2, first, when a user selects and sets an RGB correction mode at a start stage, as shown in FIG. 4A, point coordinates (1, 2, 3) defined on three planes are defined on the surface of the touch panel. The reference position coordinate Pn having the position? And the center position coordinate Cn positioned at the coordinate center 4 inside the triangle composed of these three point coordinates are displayed (S10).

In operation S20, the controller detects contact at one of three point coordinates 1, 2, and 3 displayed on the touch panel or waits for a preset time (S20).

If a contact is detected at one of the three point coordinates (1, 2, 3) (S30), it is checked whether there is a finger movement within a set time (S40).

As a result of the check (S40), when the movement of the finger is detected within the set time, the selected point coordinates are converted into the changed position with respect to the finger, and the changed position coordinate value is stored in the cache (S50). At the same time, using the current position coordinates (Pn) and the previous position coordinate values (Pn-1) stored in the cache and the set center position coordinate values (Cn and Cn-1), the color correction variables are calculated using a triangular application. (S60), thereby correcting the color attribute values of the allocated image (S70). Then, the corrected image is displayed (S71). In addition, the color attribute value of the corrected image is stored in the cache (S70). In addition, when the movement of the finger within the set time is continuously detected, the color correction operation below the change position coordinate transformation is continuously performed.

In this case, the calculation method of the color correction parameter using the triangular application in step S60 will be described in more detail as follows.

First, the predetermined reference position coordinates are calculated by calculating the center change distance between the previous center position coordinates and the current center position coordinates and the area ratio between the previous triangles and the current triangles, and then calculating the average rotation value between the previous triangles and the current triangles. The center change distance, the area ratio between triangles, and the average rotation value, which are variables necessary for RGB color correction of the image by Pn and the center position coordinate Cn, are calculated and obtained.

The center change distance, the area ratio between triangles, and the average rotation values, which are thus obtained, are the color correction variables, and the red, green, and blue values of the image are changed as set by the user. Color correction is performed.

Preferably, the image is displayed in such a manner that the corrected contents can be checked on the display, and the image of the color corrected by the user's selection or a preset condition is stored and finished.

In the above embodiment, it is determined by the user's setting whether the center correction distance, the triangle area ratio, and the average rotation value, which are color correction variables, are assigned to the red, green, and blue values of the image. Can be determined.

According to the exemplary embodiment, it is preferable that the red, green, and blue values of the image are changed in proportion to the center change distance between the position coordinates. It is preferable to set the center to the center position coordinates of the triangle as the center of gravity of the triangle.

At this time, the red, green, and blue value manipulation and change value extraction of the image are coordinates of any one of coordinates (1, 2, 3) of the three plane coordinates as shown in FIG. Three coordinates (1, 2, 3) that move in four directions (1, 2, 3) and the center of gravity (4) red, green and Implement to extract blue values. That is, the red value is a coordinate point 3 located at the lower right of three vertices of the triangle, and the red value increases as the distance from the triangle center 4 increases. The green value is the coordinate point (1) located at the top of the three vertices of the triangle, and the green value increases as the distance from the triangle center (4) increases. Finally, the blue value is the coordinate point 2 located at the lower left of the three vertices of the triangle, and the blue value increases as it moves away from the center of the triangle 4.

As such, as the coordinates of the three vertices of the triangle are moved, the center point 4 of the triangle changes together. Accordingly, as the Red value moves away from the center 4, the Green and Blue values move away from the center 4 together. This provides the effect of suggesting an ideal coordinate change of the remaining coordinates according to one coordinate change using the center of gravity principle. Accordingly, the color correction, which previously had to be adjusted individually and repeatedly, can be effectively adjusted with only one movement.

Third Example

2 is a flowchart illustrating a color correction method of an image using a touch screen according to an embodiment of the present invention. In the third embodiment, an image color correction method will be described by applying a BGC method for correcting colors by separately analyzing brightness, gamma, and contrast, to a linear application. However, this is one embodiment for explanation, and it is possible to apply the HSL method and the RGB method using the same method.

Referring to FIG. 2, first, when a user selects and sets a BGC correction mode in a start step, point coordinates (1, 2, 3) on three predefined planes are illustrated on the surface of the touch panel as shown in FIG. The reference position coordinate Pn having the position? And the center position coordinate Cn positioned at the coordinate center 4 of the linear inner or outer line consisting of these three point coordinates are displayed (S10).

In operation S20, the controller detects contact at one of three point coordinates 1, 2, and 3 displayed on the touch panel or waits for a preset time (S20).

If a contact is detected at one of the three point coordinates (1, 2, 3) (S30), it is checked whether there is a finger movement within a set time (S40).

As a result of the check (S40), when the movement of the finger is detected within the set time, the selected point coordinates are converted into the changed position with respect to the finger, and the changed position coordinate value is stored in the cache (S50). At the same time, using the current position coordinates (Pn) and the previous position coordinate values (Pn-1) stored in the cache and the set center position coordinate values (Cn and Cn-1), the color correction variables are calculated using a linear application. (S60), thereby correcting the color attribute values of the allocated image (S70). Then, the corrected image is displayed (S71). In addition, the color attribute value of the corrected image is stored in the cache (S70). In addition, when the movement of the finger within the set time is continuously detected, the color correction operation below the change position coordinate transformation is continuously performed.

In this case, the calculation method of the color correction variable using the linear application in step S60 will be described in more detail as follows.

First, the vertical component distances of the immediate distances between the position coordinates and the center position coordinates are calculated from the previous viewpoint, and then the vertical component distances of the current distances between the current position coordinates and the current center position coordinates are calculated. The vertical component distance from the center position coordinate with respect to the finger is calculated to obtain a vertical component distance ratio according to three coordinate points which are color correction variables.

The three vertical component distance ratios for the center correction distance and the three coordinate points, which are thus obtained, are the color correction variables, respectively, as set by the user, such as the brightness value, gamma value and contrast of the image. ) Value is changed to correct the color of the image.

Preferably, the image is displayed in such a manner that the corrected contents can be checked on the display, and the image of the color corrected by the user's selection or a preset condition is stored and finished. In this case, which of the three distance ratios, which are color correction variables, is assigned to a value of brightness, gamma, and contrast of an image may be determined by a user's setting.

According to an embodiment, the brightness, gamma and contrast values of the image are changed in proportion to the ratio of the center distance between the position coordinates and the ratio of the vertical and horizontal component distances to the three coordinate points. desirable. The setting of the center of the linear coordinates to the center position is preferably set to the center of gravity of the rectangle including any point corresponding to the coordinate point located at the center.

At this time, the brightness value, gamma value, and contrast value manipulation and change value extraction of the image are any one of coordinates 1, 2, and 3 of the three plane coordinates as shown in FIG. The vertical (horizontal) component distance, which is the vertical (horizontal) component distance of each finger's position coordinate, center position coordinate, and distance that is moved in four directions Calculates brightness, gamma, and contrast values of the image according to the ratio of the vertical component distances of the vertical (horizontal) component distances to the three calculated vertical component distances. Implement to extract That is, the brightness value is located on the left side of the linear line, and adjusts the dark area among all the tone areas. The gamma value is located in the center of the line and focuses on the mid-brightness of the entire tone range. Finally, the Contrast value is located on the right side of the line and focuses on the bright areas of the entire tone area.

Meanwhile, the present invention is not limited to the case where one of the HSL method, the RGB method, or the BGC method is implemented in a selected form as described above.

Therefore, not only a combination of two or modes of the HSL method, the RGB method, or the BGC method, but also a form of combining a part of another method with one method may be implemented to be selected by a user. It can also be customized to provide a user with a fixed form of combination.

Although the technical spirit of the present invention described above has been described in detail in a preferred embodiment, it should be noted that the above-described embodiment is for the purpose of description and not of limitation. In addition, those skilled in the art will understand that various embodiments are possible within the scope of the technical idea of the present invention. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

Claims (17)

(A) When the correction mode is selected by the user, a reference position coordinate having three predefined point coordinates on the surface of the touch panel and a center located at the coordinate center in the circle consisting of these three point coordinates. Displaying the position coordinates,
(B) waiting until a contact is detected at one of the three point coordinates or for a preset time;
(C) checking whether there is a finger movement within a predetermined time when a contact is detected at one of the three point coordinates;
(D) converting the selected point coordinates into a changed position with respect to the finger when the movement of the finger is detected within a predetermined time as a result of the check, and storing the changed position coordinate value in a cache;
(E) Using the current position coordinates and the previous position coordinate values stored in the cache and the current and immediately set center position coordinate values, the color correction variable is calculated using the circular application, and thus the color attribute of the assigned image. Correcting the value,
(F) storing the color attribute values of the corrected image in a cache,
At this time, the calculation method of the color correction parameter using the circular application in the step (E) calculates the center change distance between the previous center position coordinates and the current center position coordinates and the area ratio between the previous circle and the current circle, and then Obtaining an average rotation value, an area ratio between the circles, and an average rotation value, which are variables necessary for color correction of the image by the predefined reference position coordinates and the center position coordinates, by calculating an average rotation value between the current circles;
And correcting a color of the image by changing a color attribute value of the image based on at least one of the acquired color correction variable, the center change distance, the area ratio between the circles, and the average rotation value. Color correction method of image using touch screen. The method of claim 1,
The step (F) further comprises the step of displaying the image corrected by the color attribute value of the image to be corrected in the step (E) on the display so that the color of the image using the touch screen using a circular application Calibration method. The method of claim 1,
The color attribute value of the image is corrected by changing the color value of the image in proportion to the center change distance between the position coordinates, the chroma value of the image in proportion to the circular area ratio, and changing the brightness of the image in proportion to the average rotation value. Lightness) is a color correction method of an image using a touch screen using a circular application, characterized in that the value is changed. The method of claim 1,
The setting of the center of the circle to the coordinates of the center position is set to the center of gravity of the circular, characterized in that the color of the image using the touch screen using a circular application. The method of claim 3, wherein
The center change distance between the position coordinates is applied to one attribute value that is changed as the center of gravity is changed by changing the position coordinates of at least one of three color attribute values by applying a change of the center of gravity using a center of gravity point principle. Color attribute of the image using a touch screen using a circular application, characterized in that the three attribute values are changed together. The method of claim 1,
When the color correction method of the image is an HSL method, the color property values are Hue, Saturation value, and Lightness value. When the RGB method is used, the color property is Red, Green. ) And a blue value, and in the case of the BGC method, brightness, gamma, and contrast values are used to correct the color of an image using a touch screen using a circular application. (a) When the correction mode is selected by the user, a reference position coordinate having three predefined point coordinates on the surface of the touch panel and a center located at the coordinate center inside the triangle composed of these three point coordinates. Displaying the position coordinates,
(b) waiting until a contact is detected at one of the three point coordinates or for a preset time;
(c) checking whether there is a finger movement within a set time when a contact is detected at one of the three point coordinates;
(d) converting the selected point coordinates into a changed position with respect to the finger when the movement of the finger is detected within a predetermined time as a result of the check, and storing the changed position coordinate value in a cache;
(e) Using the current position coordinates and the last position coordinate values stored in the cache and the current and immediately set center position coordinate values, the color correction variable is calculated using the triangular application, and thus the color attributes of the assigned image. Correcting the value,
(f) storing the color attribute values of the corrected image in a cache,
At this time, the calculation method of the color correction parameter using the triangle application in the step (e) calculates the center change distance between the previous center position coordinates and the current center position coordinates and the area ratio between the previous triangle and the current triangle, and then Calculating a mean rotation value between current triangles to obtain a center change distance, an area ratio between triangles, and an average rotation value, which are variables necessary for color correction of the image by the predefined reference position coordinates and the center position coordinates;
And correcting the color of the image by changing a color attribute value of the image based on at least one of the acquired center correction distance, the area ratio between the triangles, and the average rotation value. Color correction method of image using touch screen. The method of claim 7, wherein
The step (f) further comprises the step of displaying the image corrected by the color attribute value of the image to be corrected in the step (e) on the display so that the color of the image using the touch screen using a triangular application Calibration method. The method of claim 7, wherein
In the correction of the color attribute value of the image, the red, green, and blue values of the image are changed in proportion to the center change distance between the position coordinates for the three coordinate points. Color correction method of the image using the touch screen. The method of claim 7, wherein
The setting of the center to the center position coordinates of the triangle is set to the center of gravity of the triangle, characterized in that the color of the image using the touch screen using a triangular application. The method of claim 7, wherein
The center change distance between the position coordinates is applied to one attribute value that is changed as the center of gravity is changed by changing the position coordinates of at least one of three color attribute values by applying a change of the center of gravity using a center of gravity point principle. Color property of the image using a touch screen using a triangular application, characterized in that the three attribute values are changed together. The method of claim 7, wherein
When the color correction method of the image is an HSL method, the color property values are Hue, Saturation value, and Lightness value. When the RGB method is used, the color property is Red, Green. ) And a blue value, and in the case of the BGC method, brightness, gamma, and contrast values are used to correct an image color using a touch screen using a triangular application. (1) When the correction mode is selected by the user, the reference position coordinate having three point coordinates defined on the plane in advance on the surface of the touch panel, and the position at the center of the coordinates inside or outside the linear line consisting of these three point coordinates Displaying a central position coordinate,
(2) waiting until a contact is detected at one of the three point coordinates or for a preset time;
(3) if a contact is detected at one of the three point coordinates, checking whether there is a finger movement within a set time;
(4) converting the selected point coordinates into a changed position with respect to the finger when the movement of the finger is detected within a predetermined time as a result of the check, and storing the changed position coordinate value in a cache;
(5) Using the current position coordinates and the last position coordinate values stored in the cache and the current and immediately set center position coordinate values, the color correction variable is calculated using a linear application, and thus the color attribute of the assigned image. Correcting the value,
(6) storing the color attribute values of the corrected image in a cache,
At this time, the calculation method of the color correction variable using the linear application in the step (5) calculates the vertical component distance of the immediately preceding distance between the position coordinates and the center position coordinates at the previous time point, and then the current position coordinates and the current center position coordinates. Computing the vertical component distance of the current distance with the, to calculate the vertical component distance from the center position coordinates with respect to the finger at the current time point and the previous time point to obtain the vertical component distance ratio for the three coordinate points as the color correction variable Wow,
And correcting the color of the image by changing a color attribute value of the image based on the obtained vertical component distance ratio. The method of claim 13,
The step (6) further comprises the step of displaying the image corrected by the color attribute value of the image corrected in the step (5) so that it can be confirmed on the display color of the image using the touch screen using a linear application Calibration method. The method of claim 13,
The correction of the color attribute values of the image is based on the ratio of the center distance between the position coordinates and the ratio of these vertical and horizontal component distances to the three coordinate points, the brightness, gamma and contrast values of the image. The color correction method of the image using the touch screen using a linear application, characterized in that each is changed. The method of claim 13,
The method of correcting the color of an image using a touch screen using a linear application, wherein the linear center to center position coordinates are set to a center of gravity of a rectangle including an arbitrary point corresponding to a coordinate point located at the center. . The method of claim 13.
When the color correction method of the image is an HSL method, the color property values are Hue, Saturation value, and Lightness value. When the RGB method is used, the color property is Red, Green. ) And a blue value, and in the case of the BGC method, brightness, gamma, and contrast values are used to correct the color of an image using a touch screen using a linear application.

Images