TWI400943B - A method and a system for adjusting the control of the border / subtitle color of the media screen - Google Patents

Description

Method and system for adjusting border/subtitle color of media screen

The present invention relates to a method and system for controlling color adjustment, and more particularly to a method and system for adjusting the border/subtitle color of a playback media screen.

When the media of the current digital signage is playing, the message border/subtitle color of the video image is missing as follows:

1. In the case of a frame, taking a message superimposed on the played image screen as an example, the outer edge of the message is mainly a frame of a predetermined color, and if the predetermined color is close to the color of the played image, it cannot be highlighted.

2. In terms of subtitles, currently, for example, the video playback media subtitles use white or yellow, and one color is in the end, and it is impossible to change different subtitle colors according to different colors of the playback media, which sometimes affects reading.

3. In the menu aspect, for example, after triggering the remote controller, the color of a menu message generated on the played image screen is fixed, and cannot change according to the color of the image screen played by the background, and is difficult to watch and operate when the color is close.

It is an object of the present invention to provide a method and system for adjusting the border/subtitle color of a playback media screen.

The method for controlling the border/subtitle color of the playback media screen comprises the following steps: (a) obtaining a first color representing a background color according to the first region of the playback media screen; (b) according to the playback media screen The second area obtains a second color representing the foreground color; and (c) determining a third color by the brightness/color difference of the first color and the second color, and using the third color as the playing media picture The color of the border/subtitle.

The method for controlling the border color of the playback media screen comprises the following steps: (a) setting an interval value time and a position and a size of the frame; (b) determining whether to reach an interval value when playing the media, if When the interval value is reached, a color adjustment control program is executed. The color adjustment control program obtains a first color representing a background color according to the first region of the playback media screen, and obtains a second region according to the playback media screen. Representing a second color of the foreground color, and determining a third color by the brightness/color difference of the first color and the second color, and recording the third color as a border color; and (c) according to the set border position And size display the border after updating the color.

The method for adjusting subtitle color of a playback media screen includes the following steps: (a) setting a brightness threshold; (b) obtaining a first color representing a background color according to the first region of the playback media screen; And playing a second color of the foreground image, determining a third color by the brightness/color difference of the first color and the second color, and determining a color brightness value by using the second color And (c) compare the color brightness value and the brightness threshold to determine which subtitle color to use.

The frame color adjustment control system of the playback media screen comprises a background color extraction module, a foreground color extraction module and a border color generation module.

The background color extraction module obtains a first color representing a background color according to the first area of the playback media screen; the foreground color extraction module obtains a second color representing the foreground color according to the second area of the playback media screen; The frame color generating module determines a third color by the brightness/color difference of the first color and the second color, and uses the third color as the color of the border of the playing media picture.

The frame color adjustment control system for playing a media screen of the present invention comprises an editing module, a designated media module and a computing module.

The editing module is configured to input data for performing related setting operations; the designated media module is configured to specify a media material of a border color in the screen to be updated; the computing module receives the input data for setting, and according to a table lookup manner The foregoing border color is generated, and the lookup table includes a timing setting table and a matching setting table, wherein the timing setting table is a frame effect according to different time changes, and the matching setting table is a foreground/background corresponding static picture/dynamic movie setting program. Set it to produce the best match.

The adjustment control system for subtitle color of the playback media screen comprises a background color extraction module, a foreground color extraction module and a subtitle color generation module: the background color extraction module is obtained according to the first region of the playback media image a first color representing a background color; the foreground color extraction module obtains a second color representing a foreground color according to the second area of the playback media image; the subtitle color generation module is configured by the first color and the second color The brightness/color difference determines a third color, and a color brightness value is obtained from the third color, and the color brightness value and the brightness threshold value are compared to determine which subtitle color is selected.

The effect of the method and system for adjusting the border/subtitle color of the playback media screen is to determine the color of the border/subtitle of the played media screen by using the first color representing the background and the brightness/color difference of the second color representing the foreground. So that the overall picture can achieve better reading results.

The above and other technical features, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments. Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals. In addition, the three primary colors mentioned in the present invention are red (R), green (G), and blue (B), respectively, and the color values (R, G, B) of the three primary colors constitute a color, and each color value ranges from 0 to 255. The color of the border can be analogized to the color of the box used for the menu or message, not limited by the color of the border.

Referring to FIG. 1 , in a preferred embodiment of the present invention, a frame/subtitle color adjustment control system 100 for playing a media screen includes a control unit 10, a display unit 11, a memory unit 12, a receiving unit 13, and an input unit. The memory unit 12 has a media library 40, a player 41, an editing program 42, a border program 43 and a caption program 44.

The control unit 10 coordinates the operation of each component, and executes the play program 41 to play the media data of the media library 40, such as a video, video, program or video file (hereinafter referred to as playing media); the display unit 11 is a display screen for Displaying a picture of the playing medium, the screen of the playing medium presents at least one border/subtitle, and the playing medium is the background of the border/subtitle; the receiving unit 13 receives the instruction of the remote controller 2 to display the menu superimposed on the playing medium by the display unit 11; The input unit 14 is an input data device such as a keyboard mouse.

The following is a description of the system principle and the adjustment control method of the border/subtitle color and the detailed operation mode of the system. In terms of the principle, with reference to FIG. 2 to FIG. 4, in the aspect of the frame processing, it can be divided into the pre-edit processing and replay processing mode as shown in FIG. 5 and the instant processing mode as shown in FIG. 6 and FIG. 7, and the subtitle processing can be referred to the figure. 8 and FIG. 9, and the transition processing is described with reference to FIGS. 10 and 11.

The color configuration principles of the editing program 42, the border program 43, and the subtitle program 44 are similar. For convenience of explanation, the border program 43 is representative.

Referring to FIG. 2, the border program 43 includes a background color extraction module 431, a foreground color extraction module 432, a border color generation module 433, and a frame generation module 434.

The method for adjusting the border color of the playback media screen of the present invention comprises the following steps: in conjunction with FIG. 3 and FIG. 4, the background color extraction module 431 obtains a first color representing the background color according to the first region 101 of the playback media screen 401 ( Step 301), for example: (Br, Bg, Bb), respectively representing the background color of red, blue, and green; then, the foreground color extraction module 432 obtains a representative foreground image according to the second area 102 of the playback media screen 401. The second color (step 302), for example: (Fr, Fg, Fb), represents the red, blue, and green of the foreground color, respectively.

It should be noted that the range extracted by the background color extraction module 431 is, for example, the peripheral area and/or the inner circumference area of the frame. The range extracted by the foreground color extraction module 432 is, for example, the media center area 103, and the foregoing selection area may be one. / Multi-point, or multi-point, or one/multiple lines, or one/multiple rectangular areas, or one/multiple arbitrary areas, as long as it is sufficient to obtain a color value, can be regarded as an element of the foreground color or the background color.

The border color generating module 433 determines a third color by the brightness/color difference of the first color and the second color, and uses the third color as the border/subtitle color of the playing media screen 401 (step 303), for example: The color value of the three primary colors is composed (C1, C2, C3); finally, the frame generation module 434 generates a border on the playing media screen, and is composed of the color value of the third color, that is, (C1, C2, C3), as The display unit 11 plays the border color of the media screen 401.

Step 303 is a "color visibility" formula of a general visual normal proposed by the W3C (World Wide Web Consortium), and the brightness formula is L=((r*299)+(g*587)+(b*) 114)) / 1000 (Formula 1), where r, g, b are red, blue, and green values, respectively, so the background brightness value BL = ((Br * 299) + (Bg * 587) + (Bb * 114 )) / 1000, the brightness value of the foreground FL = ((Fr * 299) + (Fg * 587) + (Fb * 114)) / 1000.

In addition, the foreground and background color difference values are calculated as D=abs(Fr-Br)+abs(Fg-Bg)+abs(Fb-Bb) (formula 2), where abs(n) is an absolute value; The recommended range is that the brightness difference between the background color brightness FL and the foreground color brightness BL should be greater than 125 (ie, FL-BL>125), and the color difference value D of the background color and the foreground color should be greater than 500 (ie, D>500). .

The details are as follows:

1. According to the first area of the playing media screen, obtain a first color representing the background color: the red, blue and green values of the peripheral area and the inner surrounding area of the border are averaged by the average formula value to obtain the first color. The primary color of the color consists of (Br, Bg, Bb).

2. Obtaining a second color representing the foreground color according to the second area of the playback media screen: averaging the red, blue, and green values of the plurality of points according to the average formula according to the number of points in the center area 103 of the playback media screen The calculation is performed to find the three primary color compositions (Fr, Fg, Fb) of the second color.

3. A third color is determined by the brightness/color difference of the first color and the second color: obtaining the foreground color (Fr, Fg, Fb) in the foregoing average value to select two larger values C1 and C2, which will also represent the former The color of the three colors of the scenery (Fr, Fg, Fb) is taken as the first color value C1 and the second color value C2 of the foreground color.

4. Substituting the first color value C1 and the second color value C2 into a formula to obtain a third color value C3 to form the third color: (255-C1) and (255-C2) represent the first and the third The two color values are nested into L>125 (formula 1) and D>500 (formula 2), and the range value of the third color value C3 is obtained, that is, the first and second color values C1, C2 are known numbers, unknowns C3 substitution shall be in accordance with ((255-C1)*299)+((255-C2)*587)+(C3*114))/1000>125, and abs((255-C1)-Br)+abs(( 255-C2)-Bg)+abs(C3-Bb)>500, so the third color value C3 can be obtained. If the third color value C3>255 or <0, C1 and C2 are incremented or decremented, so that 0≦ (C1 or C2 or C3) ≦ 255, and finally (C1, C2, C3) as the color of the border, you can improve the visibility of the playback frame.

After introducing the operation principle of the system, the following describes the application of each embodiment.

Application 1: Know the media playback order, then play after saving

Referring to FIG. 5, the first embodiment mainly uses the editing program 42 to use the media data and the program table of the media database 40 to edit the different border colors of the media materials at different time points in advance, and then update the media database 40 to store the same. After the media material is played, the player 41 plays to display the border after updating the color.

The editing program 42 includes an editing module 421, a designated media module 422, and a computing module 423. The editing module 421 is configured to input data to the input unit 14 for related setting operations; and the designated media module 422 is to retrieve the media data. The calculation module 423 updates the border color in the screen; the calculation module 423 generates the border color according to the table lookup manner, and the lookup table includes a timing setting table 420 and a matching setting table 425, and the timing setting table 420 is different according to different The time-varying border effect is set in the foreground/background corresponding static image/dynamic movie setting program to generate an optimal matching effect. Please refer to the text description in the matching setting table 425.

Application 2: Unknown media playback order and instant operation and display border color

When the media playback order cannot be known, such as interactive multimedia billboards, Windows window overlays, IPTV window overlays, etc., the border color can also be displayed instantly, in the case of playing media, estimating the designated areas at the next time point. The color value is calculated first to display the border color, and the border color setting method is explained as follows.

Referring to FIG. 6, the relevant parameters are first set (step 601), including the interval value time = m seconds, and the number of values of the next color value is estimated to be n (for example, n=1, 2, 3...), and Set the position and size of the border x, y, w, h.

Next, when the media is played, timing is started (step 602), and it is determined whether or not the interval value time is reached (step 603). If yes, the color adjustment control program is executed (step 604), and the color adjustment control program is step 301 to step 303 of FIG. 3, then the adjusted border color is recorded (step 605), and finally the updated border is displayed (step 606). .

Referring to Figure 7, the interval value = m seconds is a time interval, which can be an integer or a decimal, and can be converted to a normal movie time, such as 1/25 second, or 1/29.97 seconds, or 1/30 second; The preset frame data is a background color value of a specified area (peripheral) selected every m seconds, and recorded in, for example, a queue or an array structure; if it is an overlap of an Windows window overlap and an IPTV window overlap, the interval is triggered. m seconds selects the background color value of the specified area (inner circumference) and the foreground color of the center area and records it.

In addition, in the border color setting method, the border is initially displayed in a preset border color, and then the color values of the next m seconds are estimated by the regression analysis formula by the three color recording structures, respectively. The border is displayed after the border color is calculated.

Application 3: Pre-stored or instant computing and display subtitle color

The method of superimposing subtitles on a movie can use the aforementioned pre-stored or instant operation to display subtitle color, for example, subtitle color conversion in a movie, and application of a menu subtitle of a remote controller.

Referring to FIG. 8, the subtitle program 44 (FIG. 1) includes a background color extraction module 441, a foreground color extraction module 442, a subtitle color generation module 443, and a subtitle generation module 444.

In the subtitle color adjustment control method, the background color extraction module 441, the foreground color extraction module 442, and the subtitle color generation module 443 perform steps 301 to 303 of FIG. 3, and determine the foreground color three-element value by using the same calculated color formula. (0 to 255 arbitrary value) and then calculate its bright color brightness value, the difference is that the subtitle color generating module 443 continues to use the steps of FIG. 9 to determine the use of white / yellow / blue / red.

Referring to FIG. 9, the brightness threshold is first set (step 500). In the preferred embodiment, the brightness threshold has a first value, a second value, and a third value. The first value is 226, a second value of 70 and a third value of 30.

Then, the third color is calculated by the color adjustment control program (step 501), and the color adjustment control program, that is, steps 301 to 303 of FIG. 3, calculates the third color (C1, C2, C3), and The three colors calculate the brightness value (step 502). Then, the brightness value and the brightness threshold value of the third color are compared to determine which subtitle color is selected (step 503). If the brightness value of the third color is not less than 226, white is used as the subtitle color (step 504); if the brightness value of the third color is greater than 77 and less than 226, yellow is taken as the subtitle color (step 505) If the brightness value of the third color is not less than 30 and not more than 77, the red color is taken as the subtitle color (step 506); if the brightness value of the third color is less than 30, the blue color is used as the subtitle Color (step 507).

Application 4: Front and back color transition effects when border (or subtitle) color is changed

The frame (or subtitle) obtained in the above applications 1, 2, 3 assumes that C1, C2, and C3 generated at different times are two sets of different color values (r1, g1, b1) and (r2, g2, b2). Control is in a predetermined period T (division is n times), so that r1 is gradually changed to r2, g1 is changed to g2, b1 is changed to b2, and color is displayed every time interval.

Referring to FIG. 10, let r'=(r2-r1)/n;g'=(g2-g1)/n; b'=(b2-b1)/n (step 701); perform a loop within a predetermined period T i=1 to n (step 702); then, let r2=r1+r'*i; g2=g1+g'*i; b2=b1+b'*i (step 703); with r2, g2, b2 The border (or subtitle) color is displayed and the color is set (step 704) until the loop is completed. As a result, when the foreground or background media is switched, the color of the border (or subtitle) also changes, which also conforms to the "color visibility" specification.

Referring to FIG. 11, the transition color effect of the border color is yellow to blue, and the initial yellow color (255, 255, 0), after 16 times, can be gradually changed to the value of the target color blue (0, 0, 255).

In summary, the method and system for adjusting the border/subtitle color of the playback media screen of the present invention have the effect of determining the playing media screen by using the first color representing the background and the brightness/color difference of the second color representing the foreground. The color of the border/subtitle enables the overall picture to achieve a better reading effect, so the object of the present invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent.

10. . . control unit

100. . . Adjustment control system

101. . . First area

102. . . Second area

103. . . Central region

11. . . Display unit

12. . . Memory unit

13. . . Receiving unit

14. . . Input unit

301~303. . . step

40. . . Media database

401. . . Media screen

41. . . Player

42. . . Editing program

420. . . Timing setting table

421. . . Editing module

422. . . Specified media module

423. . . Computing module

425. . . Match setting table

43. . . Border program

431. . . Background color extraction module

432. . . Foreground extraction module

433. . . Border color generation module

434. . . Border generation module

44. . . Subtitle program

441. . . Background color extraction module

442. . . Foreground extraction module

443. . . Subtitle color generation module

444. . . Subtitle generation module

500~507. . . step

601~606. . . step

701~704. . . step

1 is a system block diagram showing a preferred embodiment of a frame/subtitle color adjustment control system for playing a media picture of the present invention;

Figure 2 is a schematic diagram showing the operation of the border program;

3 is a flow chart illustrating a method for adjusting the color of a border of a playback media screen of the present invention;

4 is a schematic diagram illustrating a first area, a second area, and a frame of a playback media screen;

FIG. 5 is a schematic diagram illustrating the use of an editing program to edit media frames in advance to edit different media colors at different time points;

6 is a flow chart illustrating the unknown media playback order and real-time operation and display border color;

Figure 7 is a schematic view showing the operation principle of Figure 6;

Figure 8 is a schematic diagram showing the operation principle of the subtitle program;

FIG. 9 is a flowchart illustrating a method for adjusting and controlling subtitle color of a playback media screen of the present invention; FIG.

Figure 10 is a schematic view showing the effect of color transition before and after the color change of the border (or subtitle); and

Figure 11 is a schematic view showing the operation process of Figure 10.

301~303. . . step

Claims (10)

A method for controlling a border/subtitle color of a playback media screen, comprising the steps of: (a) obtaining a first color representing a background color according to the first region of the playback media screen; (b) according to the playback media screen The second area obtains a second color representing the foreground color; and (c) determining a third color by the brightness/color difference of the first color and the second color, and using the third color as the playing media picture The color of the border/subtitle. According to the method for adjusting the border/subtitle color of the playback media picture according to the first aspect of the patent application scope, the step (c) is to compare the three primary color values representing the foreground color as the foreground color. a color value and a second color value, substituting the first and second color values into a brightness formula and a color difference formula to determine a third color value, and composing the first, second, and third color values The third color. According to the method for adjusting the border/subtitle color of the playback media screen according to the first or second aspect of the patent application, the step (a) is based on the red and blue points of the peripheral area and the inner circumference area of the border/subtitle. The green value is the background color value, and the red, blue and green values of the peripheral area and the inner surrounding area are respectively averaged by the average value formula to obtain the three primary color components of the first color; the step (b) is based on the playing. The central portion of the media picture takes a number of points and averages the red, blue, and green values of the points to calculate the three primary colors of the second color. The method for controlling the border/subtitle color of the playback media screen according to the first or second aspect of the patent application is controlled to have a transition effect before and after the color change of the border or the subtitle color in a predetermined period. The method for adjusting the color of the border color of the playing media screen comprises the following steps: (a) setting an interval value time and a position and a size of the frame; (b) determining whether to reach an interval value when playing the media, if When the interval value is reached, a color adjustment control program is executed. The color adjustment control program obtains a first color representing a background color according to the first region of the playback media screen, and obtains a second region according to the playback media screen. Representing a second color of the foreground color, and determining a third color by the brightness/color difference of the first color and the second color, and recording the third color as a border color; and (c) according to the set border position And size display the border after updating the color. A method for controlling subtitle color playback of a media screen, comprising the steps of: (a) setting a brightness threshold; (b) obtaining a first color representing a background color according to the first region of the playback media screen; And playing a second color of the foreground image, determining a third color by the brightness/color difference of the first color and the second color, and determining a color brightness value by using the second color And (c) compare the color brightness value and the brightness threshold to determine which subtitle color to use. According to the method for adjusting the color of the subtitle color of the playback media screen according to the sixth aspect of the patent application, wherein the brightness threshold has a first value, a second value and a third value according to the value. The color value of the three colors is not less than the first value, that is, white is selected as the subtitle color; if the color brightness value of the third color is greater than the second value and less than the first value, the yellow color is taken as Subtitle color; if the color brightness value of the third color is not less than the third value and not greater than the second value, the red color is selected as the subtitle color; if the color brightness value of the third color is less than the third color Value, that is, blue is used as the subtitle color. An adjustment control system for playing a border color of a media picture, comprising: a background color extraction module, obtaining a first color representing a background color according to the first area of the playback media picture; and a foreground color extraction module, according to the playing The second area of the media picture obtains a second color representing the foreground color; a border color generation module determines a third color by the brightness/color difference of the first color and the second color; and a frame generation module When the playback media screen generates a border, the third color is used as the color of the border of the playback media screen. An adjustment control system for playing a border color of a media screen, comprising: an editing module for inputting data for performing related setting operations; and a designated media module for designating a media material for updating a border color in the screen; and a computing module receives the input data for setting, and generates the foregoing border color according to the table lookup manner, wherein the lookup table includes a timing setting table and a matching setting table, and the timing setting table is a frame effect according to different time changes. The collocation setting table is set by the foreground/background corresponding static picture/dynamic movie setting program to generate an optimal matching effect. An adjustment control system for playing subtitle color of a media picture, comprising: a background color extraction module, obtaining a first color representing a background color according to the first area of the playback media picture; and a foreground color extraction module, according to the playing The second area of the media picture obtains a second color representing the foreground color; and a subtitle color generating module, the third color is determined by the brightness/color difference of the first color and the second color, and the third color is used The color finds a color brightness value, and compares the color brightness value and the brightness threshold to determine which subtitle color to use.