CN115150608B - Method for optimally displaying common video on giant-screen naked-eye 3D folding angle screen - Google Patents
Method for optimally displaying common video on giant-screen naked-eye 3D folding angle screen Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
- H04N13/30—Image reproducers
- H04N13/302—Image reproducers for viewing without the aid of special glasses, i.e. using autostereoscopic displays
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- H—ELECTRICITY
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- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N13/00—Stereoscopic video systems; Multi-view video systems; Details thereof
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Abstract
The invention provides a method for optimally displaying a common video on a giant-screen naked-eye 3D folding screen, belongs to the technical field of video processing and processing, relates to the technology of realizing video cutting, three-dimensional rotation, movement and stitching through a technical means and an algorithm model so as to improve the display effect of the video on the giant-screen naked-eye 3D folding screen, and particularly relates to the technology of performing specific cutting, three-dimensional rotation, movement and stitching according to parameters such as the length, width, height from the ground, the optimal viewing angle, the horizontal distance between the optimal viewing angle and the screen, the folding angle, the video resolution and the like of the finally displayed giant-screen naked-eye 3D folding screen, which is particularly suitable for optimizing the display effect of the common video on the folding screen.
Description
Technical Field
The invention relates to a method for optimally displaying a common video on a giant naked eye 3D folding angle screen, and belongs to the technical field of video processing.
Background
The huge curtain naked eye 3D angle folding screen belongs to one of LED large screens, and a 3D effect is formed through visual characteristics and specific contents, so that the purpose of naked eye 3D is achieved. The creative cost of the naked eye 3D technology aiming at the huge curtain angle folding screen is very high, the creative technology needs to adapt to the whole coverage of different screen shapes, sizes and viewing angles, the manufacturing period is long, and the timeliness is poor. Most of the contents displayed on the angle folding screen are specially customized at present, a large amount of time and experience are needed for professional production personnel to produce the contents, and the contents are needed to be subjected to field adjustment and optimization for many times, so that the traditional mode is high in price and long in period, and can only be put after materials are produced in advance, and a live broadcast scene cannot be supported. For the common video and the live broadcast content, the related technology does not process the common video, but directly puts the common video, so that the display effect is extremely poor.
Disclosure of Invention
The invention aims to provide a method for optimally displaying a common video on a giant screen naked eye 3D folding angle screen, and solves the problem that the display effect of the common video on the folding angle screen is poor.
The invention aims to achieve the aim, and the aim is achieved by the following technical scheme:
step 1: determining an optimal view angle and extracting a folded angle screen model;
step 2: optimizing the screens at two sides of the folding angle screen, and supplementing the sizes of the screens at two sides on the model;
step 3: the vertical distance X between the optimal visual angle and the corner screen corner boundary point and the human eyes is calculated, and the specific formula is as follows:
X=(L*(Htoland+HL-HP))/(L+ G)
wherein: htoland is the screen ground clearance, HL is the screen height, HP is the viewer height, L is the horizontal distance from the person to the screen, G is the distance from the folded angle of the folded angle screen to the diagonal of a quadrangle formed by the left and right screens of the folded angle screen after the two screens are complemented into a model with the same width according to the widest screen;
step 4: the angle alpha of the best view angle sight and the top edge is calculated, and the specific formula is as follows:
α= arctan（（Htoland+HL-HP-X）/WR）
wherein: WR is the screen width on the large side of the screen;
step 5: cutting the video width of the small side of the screen from the large side of the screen into WL/(WR+WL) according to the ratio of the width of the small side of the folded screen to the width of the large side of the screen by using a video editing tool, and cutting the video width of the large side of the screen from the small side of the screen into W-WL/(WR+WL), wherein WL is the width of the small side of the screen, and W is the width of video resolution;
step 6: reversely cutting the video on the small side of the screen into the same width as the video on the large side of the screen;
step 7: calculating a three-dimensional rotation angle, setting the rotation angle on the y axis as a fixed value, and calculating the rotation angle on the x axis;
step 8: setting the three-dimensional rotation angle of the x-axis as theta and the three-dimensional rotation angle of the y-axis as sigma for the video on the small side of the screen by using a video editing tool; setting the three-dimensional rotation angle of an x-axis as 360-theta and setting the three-dimensional rotation angle of a y-axis as sigma for a video on the large side of the screen; splicing the two videos into one video; and intercepting the spliced video according to the maximum square and exporting the video.
Preferably, the specific steps for calculating the three-dimensional rotation angle are as follows:
1) The x-axis and y-axis rotation formulas and coordinates are calculated,
the formula of rotation according to the X axis in three-dimensional rotation is:
the formula according to the Y-axis rotation in the three-dimensional rotation is:
since the rotation of the Z-axis coordinate is not involved, the Z-axis coordinate is not calculated, and thus a coordinate obtained by three-dimensionally rotating the θ -angle according to the X-axis and a coordinate obtained by three-dimensionally rotating the σ -angle according to the Y-axis on the basis of the X-axis rotation are obtained:
wherein: θ is an X-axis rotation angle, σ is a Y-axis rotation angle, U (0), V (0), W (0) are vertices on X, Y, Z coordinates, ux (θ), vx (θ), wx (θ) are coordinates after three-dimensional rotation of θ angles according to the X-axis, and Uxy (σ), vxy (σ), wxy (σ) are coordinates after three-dimensional rotation of σ angles according to the Y-axis on the basis of X-axis rotation, wherein Wxy (σ) =wx (θ) =w (0);
2) Coordinates of the screen after rotation of the upper left corner and the upper right corner are calculated according to the following formulas, namely, uxy (sigma) left, vxy (sigma) left, uxy (sigma) right and Vxy (sigma) right;
wherein: w is the image width, and U (0) -w and V (0) are the coordinates of the left upper angle X and Y axes;
3) The angle of the upper right corner after rotation, which changes on the plane, is equal to the angle alpha calculated in the step 4, and the following result can be obtained according to the trigonometric function formula:
4) The rotation angle θ on the x-axis is calculated by setting the rotation angle σ on the y-axis to a fixed value.
The invention has the advantages that: the invention solves the problem that the display effect of the common video on the folding angle screen is poor, and solves the problems of poor display effect, low manufacturing cost and long period of the traditional folding angle screen video. The invention can be used for the case that the folding angle of the folding angle screen is 90 degrees, is also suitable for the case that the folding angle is larger than 90 degrees, and achieves the purpose of accurate adaptation by calculating the rotation angle and the scaling by taking the folding angle number as a parameter.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
FIG. 1 is a schematic diagram of the best view mode determination according to the present invention.
FIG. 2 is a schematic diagram of the width compensation method of the present invention.
FIG. 3 is a schematic diagram showing a comparison of left and right screen widths according to the present invention.
Fig. 4 is a schematic view showing the vertical distance between the eye and the corner boundary point of the corner screen for the optimum viewing angle.
FIG. 5 is a schematic view of the best view angle line of the present invention with the top edge angle.
Fig. 6 is a schematic diagram of the coordinate labeling of the video in the upper left, upper right, and three-dimensional rotation of the video according to the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention aims to provide a method for optimally displaying a common video on a giant screen naked eye 3D folding screen, which is used for carrying out scaling, rotation, cutting and stitching on the video through a video processing technology and an algorithm model so as to improve the display effect of the common video on the folding screen.
In order to achieve the above purpose, the design scheme of the invention is as follows:
for ease of calculation, the parameter settings (see fig. 1) are as follows:
large screen left screen size (left and right according to human viewing angle): WL, HL right screen size WR: HR, where hl=hr
Screen height above ground: htoland
Height of person: HP (high pressure)
Horizontal distance of person from screen: l (L)
The angle of the folding angle screen is beta
The video resolution is: w: h
The first step: the best viewing angle is determined, as shown in fig. 1, in a manner that the folded angle of the folded angle screen is right in front of the folded angle, and the distance is L.
And a second step of: the two screens of the corner screen are mostly unequal in width, and for convenience of accurate calculation, the screens with small widths are complemented equally on the model, as shown in fig. 2.
And a third step of: the vertical distance from the eye to the junction point of the optimal viewing angle and the folding angle of the folding angle screen is calculated, as shown in figure 4,
X=(L*(Htoland+HL-HP))/(L+G)。
fourth step: the angle of the best view line to the top edge is calculated, as shown in figure 5,
α= arctan（（Htoland+HL-HP-X）/WR）。
fifth step: the left video is cut from the right to WL/(wr+wl) and the right video is cut from the left to W-WL/(wr+wl) in accordance with the left screen width ratio of the corner screen using a video editing tool.
Sixth step: the left side view is trimmed (reverse cut) to the same width as the right side view.
Seventh step: calculating a three-dimensional rotation angle, setting the rotation angle on the y axis as a fixed value sigma=20°, and calculating a rotation angle theta on the x axis; the method comprises the following specific steps:
1) The x-axis and y-axis rotation formulas and coordinates are calculated,
the formula of rotation according to the X axis in three-dimensional rotation is:
the formula according to the Y-axis rotation in the three-dimensional rotation is:
since the rotation of the Z-axis coordinate is not involved, the Z-axis coordinate is not calculated, and thus a coordinate obtained by three-dimensionally rotating the θ -angle according to the X-axis and a coordinate obtained by three-dimensionally rotating the σ -angle according to the Y-axis on the basis of the X-axis rotation are obtained:
wherein: θ is an X-axis rotation angle, σ is a Y-axis rotation angle, U (0), V (0), W (0) are vertices on X, Y, Z coordinates, ux (θ), vx (θ), wx (θ) are coordinates after three-dimensional rotation of θ angles according to the X-axis, and Uxy (σ), vxy (σ), wxy (σ) are coordinates after three-dimensional rotation of σ angles according to the Y-axis on the basis of X-axis rotation, wherein Wxy (σ) =wx (θ) =w (0);
2) Coordinates of the screen after rotation of the upper left corner and the upper right corner are calculated according to the following formulas, namely, uxy (sigma) left, vxy (sigma) left, uxy (sigma) right and Vxy (sigma) right;
wherein: w is the image width, and U (0) -w and V (0) are the coordinates of the left upper angle X and Y axes;
3) The angle of the upper right corner after rotation, which changes on the plane, is equal to the angle alpha calculated in the step 4, and the following result can be obtained according to the trigonometric function formula:
4) The rotation angle θ on the x-axis is calculated by setting the rotation angle σ on the y-axis to a fixed value.
Tenth step: in the video editing tool, as shown in fig. 6, the left side view sets the x-axis three-dimensional rotation angle to θ and the y-axis three-dimensional rotation angle to σ; the right side is used for setting the three-dimensional rotation angle of the x axis to be 360-theta and setting the three-dimensional rotation angle of the y axis to be sigma.
Eleventh step: in the video editing tool, two videos are spliced into one video; and intercepting the spliced video according to the maximum square and deriving the video.
And finally, delivering the video on the playing equipment after the video is exported.
The invention aims to process the video through a video processing technology and a mathematical model, thereby improving the display effect of the common video on the folding angle screen.
The invention aims to reduce the cost of manufacturing the folded angle screen content by technical means.
The invention aims to improve the efficiency of manufacturing the folded angle screen content by a technical means.
Claims (2)
1. The method for optimally displaying the common video on the giant screen naked eye 3D folding angle screen is characterized by comprising the following steps of:
step 1: determining an optimal view angle and extracting a folded angle screen model;
step 2: optimizing the screens at two sides of the folding angle screen, and supplementing the sizes of the screens at two sides on the model;
step 3: the vertical distance X between the optimal visual angle and the corner screen corner boundary point and the human eyes is calculated, and the specific formula is as follows:
X=(L*(Htoland+HL-HP))/(L+ G)
wherein: htoland is the screen ground clearance, HL is the screen height, HP is the viewer height, L is the horizontal distance from the person to the screen, G is the distance from the folded angle of the folded angle screen to the diagonal of a quadrangle formed by the left and right screens of the folded angle screen after the two screens are complemented into a model with the same width according to the widest screen;
step 4: the angle alpha of the best view angle sight and the top edge is calculated, and the specific formula is as follows:
α= arctan（（Htoland+HL-HP-X）/WR）
wherein: WR is the screen width on the large side of the screen;
step 5: cutting the video width of the small side of the screen from the large side of the screen into WL/(WR+WL) according to the ratio of the width of the small side of the folded screen to the width of the large side of the screen by using a video editing tool, and cutting the video width of the large side of the screen from the small side of the screen into W-WL/(WR+WL), wherein WL is the width of the small side of the screen, and W is the width of video resolution;
step 6: reversely cutting the video on the small side of the screen into the same width as the video on the large side of the screen;
step 7: calculating a three-dimensional rotation angle, setting the rotation angle on the y axis as a fixed value, and calculating the rotation angle on the x axis;
step 8: setting the three-dimensional rotation angle of the x-axis as theta and the three-dimensional rotation angle of the y-axis as sigma for the video on the small side of the screen by using a video editing tool; setting the three-dimensional rotation angle of an x-axis as 360-theta and setting the three-dimensional rotation angle of a y-axis as sigma for a video on the large side of the screen; splicing the two videos into one video; and intercepting the spliced video according to the maximum square and exporting the video.
2. The method for optimally displaying the common video on the macro-screen naked-eye 3D angle folding screen according to claim 1, wherein the specific steps of calculating the three-dimensional rotation angle are as follows:
1) The x-axis and y-axis rotation formulas and coordinates are calculated,
the formula of rotation according to the X axis in three-dimensional rotation is:
the formula according to the Y-axis rotation in the three-dimensional rotation is:
since the rotation of the Z-axis coordinate is not involved, the Z-axis coordinate is not calculated, and thus a coordinate obtained by three-dimensionally rotating the θ -angle according to the X-axis and a coordinate obtained by three-dimensionally rotating the σ -angle according to the Y-axis on the basis of the X-axis rotation are obtained:
wherein: θ is an X-axis rotation angle, σ is a Y-axis rotation angle, U (0), V (0), W (0) are vertices on X, Y, Z coordinates, ux (θ), vx (θ), wx (θ) are coordinates after three-dimensional rotation of θ angles according to the X-axis, and Uxy (σ), vxy (σ), wxy (σ) are coordinates after three-dimensional rotation of σ angles according to the Y-axis on the basis of X-axis rotation, wherein Wxy (σ) =wx (θ) =w (0);
2) Coordinates of the screen after rotation of the upper left corner and the upper right corner are calculated according to the following formulas, namely, uxy (sigma) left, vxy (sigma) left, uxy (sigma) right and Vxy (sigma) right;
wherein: w is the image width, and U (0) -w and V (0) are the coordinates of the left upper angle X and Y axes;
3) And 4, calculating the following result according to a trigonometric function formula, wherein the angle of the change of the upper right angle on the plane after rotation is equal to the angle alpha calculated in the step 4:
4) The rotation angle θ on the x-axis is calculated by setting the rotation angle σ on the y-axis to a fixed value.
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| CN114282285A (en) * | 2021-12-28 | 2022-04-05 | 中电云数智科技有限公司 | Visual large-screen aided design method based on human visual characteristics |
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| CN108572460B (en) * | 2017-03-09 | 2021-04-20 | 华为技术有限公司 | Image display system |
| US11392176B2 (en) * | 2019-01-04 | 2022-07-19 | Hewlett-Packard Development Company, L.P. | Display screen adjustments via rails |
| CN110992253B (en) * | 2019-11-30 | 2024-03-22 | 咪咕视讯科技有限公司 | Video display method, system, storage medium and terminal with flexible screen |
| US11574081B2 (en) * | 2020-03-18 | 2023-02-07 | Jvckenwood Corporation | User interface manipulation in a foldable screen device |
| CN113542463B (en) * | 2021-06-30 | 2024-02-13 | 惠州Tcl移动通信有限公司 | Video shooting device and method based on folding screen, storage medium and mobile terminal |
| CN113805655A (en) * | 2021-09-09 | 2021-12-17 | 维沃移动通信有限公司 | Display method and device and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102169283A (en) * | 2011-04-19 | 2011-08-31 | 浙江大学 | Suspension type 360-degree view field three-dimensional display device based on projector array |
| CN114282285A (en) * | 2021-12-28 | 2022-04-05 | 中电云数智科技有限公司 | Visual large-screen aided design method based on human visual characteristics |
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