CN103826114A - Stereo display method and free stereo display apparatus - Google Patents
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Abstract
The invention provides a stereo display method and a free stereo display apparatus. The method which is applied to the free stereo display apparatus comprises obtaining N viewpoint stereo image based on a video image, N being an integer equal to or larger than 2; obtaining N character graphs; rendering the N character graphs based on the image coding mode of the free stereo display apparatus to obtain N viewpoint stereo character graphs; and displaying the N viewpoint stereo character graphs on corresponding positions of the N viewpoint stereo image.
Description
Technical field
Display Technique of the present invention field, relates in particular to a kind of stereo display method and auto-stereoscopic display device.
Background technology
At present, auto-stereoscopic display device has obtained larger development, progressively enters commercial demonstration market, and develops towards family expenses display direction.These 3 d display devices, by playing 2D video image or 2 viewpoint 3D video images, provide three-dimensional stereoscopic visual impression to user.These 2D video images or 2 viewpoint 3D video images are greatly all with captions, these captions are embedded in image frame, because captions turn many viewpoints 3D or 2 viewpoint 3D turn in the process of many viewpoints 3D at 2D, free stereo algorithm is obscuring captions character and video image background usually, therefore be easy in the time of the three-dimensional depth of computed image picture, there is erroneous judgement in the edge in captions and image background, thereby cause the depth of field distortion of the edge of captions and image background, there is bird caging phenomenon in picture, has a strong impact on user's viewing effect.
Therefore, in prior art, there is captions and video image marginal distortion, cause the technical problem of picture distortion.
Summary of the invention
The embodiment of the present invention provides a kind of stereo display method and auto-stereoscopic display device, in order to solve the captions and the video image marginal distortion that exist in prior art, causes the technical problem of picture distortion.
One aspect of the present invention provides a kind of stereo display method, is applied to an auto-stereoscopic display device, and described method comprises: obtain N viewpoint stereo-picture based on video image, N is more than or equal to 2 integer; Obtain N width character graphics; According to the Image Coding mode of described auto-stereoscopic display device, play up described N width character graphics, obtain the three-dimensional character graphics of N viewpoint; Three-dimensional described N viewpoint character graphics is presented on the relevant position of described N viewpoint stereo-picture.
The present invention also provides a kind of electronic equipment on the other hand, comprising: multi-viewpoint stereo image rendering module, and for obtain N viewpoint stereo-picture based on video image, N is more than or equal to 2 integer; Character graphics drafting module, for obtaining N width character graphics; Many viewpoints character graphics rendering module, for according to the Image Coding mode of described auto-stereoscopic display device, plays up described N width character graphics, obtains the three-dimensional character graphics of N viewpoint; Display module, for being presented at three-dimensional described N viewpoint character graphics the relevant position of described N viewpoint stereo-picture.
The one or more technical schemes that provide in the embodiment of the present invention, at least have following technique effect or advantage:
The stereo display method providing in an embodiment of the present invention, obtains N viewpoint stereo-picture based on video image, and N is more than or equal to 2 integer; Obtain N width character graphics; According to the Image Coding mode of described auto-stereoscopic display device, play up described N width character graphics, obtain the three-dimensional character graphics of N viewpoint; Three-dimensional described N viewpoint character graphics is presented on the relevant position of described N viewpoint stereo-picture.Also, in the present embodiment, captions are separated with video image, process respectively, so can avoid occurring the problem of captions marginal distortion.
Accompanying drawing explanation
Fig. 1 is the flow chart of the stereo display method in the application one embodiment;
Fig. 2 is the schematic diagram that white space is filled in the application one embodiment;
Fig. 3 is the functional block diagram of the auto-stereoscopic display device in one embodiment of the invention.
Embodiment
The embodiment of the present invention provides a kind of stereo display method and auto-stereoscopic display device, in order to solve the captions and the video image marginal distortion that exist in prior art, causes the technical problem of picture distortion.
Technical scheme in the embodiment of the present invention is to solve above-mentioned technical problem, and general thought is as follows:
The stereo display method providing in an embodiment of the present invention, obtains N viewpoint stereo-picture based on video image, and N is more than or equal to 2 integer; Obtain N width character graphics; According to the Image Coding mode of described auto-stereoscopic display device, play up described N width character graphics, obtain the three-dimensional character graphics of N viewpoint; Three-dimensional described N viewpoint character graphics is presented on the relevant position of described N viewpoint stereo-picture.Also, in the present embodiment, captions are separated with video image, process respectively, so can avoid occurring the problem of captions marginal distortion.
In order better to understand technique scheme, below in conjunction with Figure of description and concrete execution mode, technique scheme is described in detail.
The embodiment of the present invention provides a kind of stereo display method, be applied in an auto-stereoscopic display device, the television set that this auto-stereoscopic display device concrete example in this way can free stereo shows, liquid crystal display, or other electronic equipments that can free stereo show.
Please refer to Fig. 1, next introduce the stereo display method in the present embodiment, the method comprises:
Step 101: obtain N viewpoint stereo-picture based on video image, N is more than or equal to 2 integer;
Step 102: obtain N width character graphics;
Step 103: according to the Image Coding mode of auto-stereoscopic display device, play up N width character graphics, obtain the three-dimensional character graphics of N viewpoint;
Step 104: three-dimensional N viewpoint character graphics is presented on the relevant position of N viewpoint stereo-picture.
Wherein, step 101 and step 102 to the execution sequence of step 103 can change, for example, first perform step 102 to step 103, perform step again 101, also can as shown in Figure 1, first perform step 101, perform step again 102 to step 103, or can also carry out simultaneously.
Wherein, in practice, video image may be 2D video image or 2 viewpoint 3D video images.Further, in video file, may comprise independently subtitle file, also may not comprise independently subtitle file, captions are to combine together with image frame.And according to having independently subtitle file and subtitle file independently not, the implementation process of step 101 and step 102 is slightly different, below a point situation is introduced.
In the first situation, video file comprises independently subtitle file, and step 101 is specially so: the depth information that obtains video image; According to depth information and video image, play up according to the Image Coding mode of auto-stereoscopic display device, obtain N viewpoint stereo-picture.Video image herein can be 2D video image or 2 viewpoint 3D video images.
Further, step 102 specifically comprises: the subtitle file based on video image obtains a character graphics; Copy N-1 width character graphics based on character graphics, obtain N width character graphics, wherein, the displacement of adjacent two width character graphicss is the first displacement, for example, copy in the horizontal direction, and the first displacement is horizontal displacement.Specifically, can be based on arrange font and/or font size by the captioned test changed figure in subtitle file, the font of this setting and/or font size can be the default values of system, or arranged by user, certainly it is also conceivable that other parameters, these parameter art technology can be selected according to actual needs.
Further, in this kind of situation, the first displacement can arrange or use system default value by user, the going out screen or enter the degree of stereoeffect of screen of the first Influence of Displacement captions, when the value of the first displacement is greater than zero and when larger, captions to go out screen degree larger, when the value of the first displacement is less than zero and absolute value when larger, captions to enter screen degree larger, in the time that the value of the first displacement is zero, captions are 2D display effect.Therefore, can obtain very easily different Subtitle Demonstration effects.
In the second situation, video file does not comprise independently subtitle file, so before step 102, the method also comprises: obtain the captions character edge figure on video image, concrete example is listed as to the boxed area of the capable j+y row of i+x and carries out rim detection the capable j of i of current frame image A by canny edge detection algorithm or other edge detection algorithms in this way, because the color distortion of captions color and background image is larger, more easily obtain captions character edge figure, wherein, the scope of surveyed area can be set by the user, the efficiency that rational scope can improve detection algorithm is set.In such cases, video image can be 2D video image or 2 viewpoint 3D video images, just for 2D video image, after current frame image A is carried out to rim detection, acquisition is one group of captions character edge figure, and for 2 viewpoint 3D video images, after detecting, acquisition is two groups of captions character edge figures.Carry out after this step, the current frame image of removing captions character edge figure has a white space.
In the time that detection gets captions character edge figure, just perform step 102, specifically comprise: the captions character edge figure based on video image obtains a character graphics; Copy N-1 width character graphics based on character graphics, obtain N width character graphics, wherein, the displacement of adjacent two width character graphicss is the first displacement, for example, copy in the horizontal direction, and the first displacement is horizontal displacement.Specifically, in step 102, the captions character edge figure based on video image obtains a character picture and is specially: captions character edge figure is filled to obtain character graphics.
The in the situation that of the present embodiment, the first displacement is different and slightly different according to video image, and in the time that video image is 2D image, the value of the first displacement specifically can, as described in the previous case, arrange or use system default value by user; And in the time that video image is 2 viewpoint 3D rendering, except can, with the method value as described in the previous case, can also be the parallax value of obtaining captions character edge figure from 2 viewpoint 3D video images; Determine the first displacement according to parallax value, under normal circumstances, the first displacement is consistent with this parallax value, for example identical.
Further, the step 101 in the second situation specifically comprises: video image is got on and filled except the white space of captions character edge figure, obtain video image after treatment; Obtain the depth information of video image after treatment; Take video image after treatment as benchmark image, according to depth information, play up according to the Image Coding mode of auto-stereoscopic display device, obtain N viewpoint stereo-picture.
Below introduce a kind of feasible fill method, the rule that assignment is filled is as follows:
1. with behavior unit, the pixel in character edge in the every a line of processing place successively; When the pixel of the capable b of a row is during in certain of row character edge, give new value by the pixel of capable a b row
, wherein k1, k2, k3, k4 are less than or equal to 1 weight coefficient.In the specific implementation, as shown in Figure 2, when the neighbor of the pixel of the capable b row of a is picture material, weight coefficient corresponding to this pixel is 1; In the closed contour of the neighbor of the pixel of the capable b row of a in capable certain character edge or edge composition, the corresponding weight coefficient of this pixel is 0.
2. with behavior unit, successively to carry out assignment in the pixel of 1 location of pixels of contiguous character edge in every a line;
3. with behavior unit, successively to carry out assignment in the pixel of 2 location of pixels of contiguous character edge in every a line;
Repeat above process, the whole pixels of white space again assignment are filled.In other embodiments, can also fill with the fill rule that stands up, as long as white space is filled, so can avoid producing degree of depth distortion in captions edge in the time that video image is carried out to depth extraction.For convenient description below, the video image of the NULI character content after filling is called to current frame image B here.
Then obtain the depth information of current frame image B, and take current frame image B as benchmark image, according to the depth information obtaining, play up according to the Image Coding mode of auto-stereoscopic display device, obtain N viewpoint stereo-picture.
No matter be which kind of situation, when obtaining after N width character graphics, just perform step 103, according to the Image Coding mode of auto-stereoscopic display device, play up N width character graphics, obtain the three-dimensional character graphics of N viewpoint.Wherein, in this step, the degree of depth of character graphics can be provided also and can be arranged by user by system.
Next perform step 104, be presented on the relevant position of N viewpoint stereo-picture by the three-dimensional character graphics of N viewpoint.In practice, step 104 also has numerous embodiments, corresponding to aforementioned the first situation, step 104 specifically can comprise: add three-dimensional described N viewpoint character picture to transparent OSD layer, according to the position of the OSD layer of time shaft and user's setting, and stacked this OSD adding is presented on the N viewpoint stereo-picture obtaining in step 101, in stereoscopic video images, show three-dimensional captions thereby realize.Wherein time shaft is generally comprised within subtitle file.
And corresponding to aforementioned the second situation, step 104 specifically comprises: add three-dimensional N viewpoint character graphics to transparent OSD layer, and by stacked this OSD correspondence position that is added to N viewpoint stereo-picture layer, this correspondence position specifically can be determined by following steps:
Calculate the resolution extension of benchmark image to the full frame resolution of the display of auto-stereoscopic display device required horizontal resolution expansion ratio and vertical resolution expansion ratio;
According to horizontal resolution expansion ratio and vertical resolution expansion ratio to captions character edge figure the first coordinate position in video image adjust, obtain the second coordinate position, the second coordinate position is this relevant position.
The resolution of for example benchmark image is that 600 × 800(is respectively vertical resolution and horizontal resolution, the format write of following resolution is identical therewith), the full frame resolution 900 × 1200 of display, the first coordinate position concrete example [(100 × 200) in this way, (200 × 600)], in the present embodiment, the data record of the first coordinate position is two coordinate figures at diagonal angle.Calculated level resolution extension ratio is 1.5 times so, vertical resolution expansion ratio is 1.5 times, the second coordinate position is vertical resolution and horizontal resolution on the first coordinate position and expands respectively 1.5 times so, the second coordinate position is [(150 × 300), (300 × 900)] so.
Wherein, in the time that video image is 2D image, benchmark image is specially aforementioned current frame image B, and while being 2 viewpoint 3D rendering for video image, benchmark image is specially the left visual point image of visual point image L(of aforementioned current frame image B) or the right visual point image of visual point image R().
Wherein, the first coordinate position can be specifically the home position of the captions that record in the time obtaining captions character edge figure.By the method, can make character graphics to cover and be suspended on the original captions position on stereo-picture, thereby realize the three-dimensional Subtitle Demonstration at video image.
In practice, step 104 can also realize by other means, for example, by three-dimensional N viewpoint character graphics and N viewpoint stereo-picture, play up according to the Image Coding mode of auto-stereoscopic display device, by the pixel on relevant position on the alternative N viewpoint stereo-picture of pixel of the three-dimensional character graphics of N viewpoint.
Can be found out by above description, in the present embodiment, captions be separated with video image, process respectively, so can avoid occurring the problem of captions marginal distortion.
Based on same inventive concept, one embodiment of the invention also provides a kind of auto-stereoscopic display device, and as shown in Figure 3, this auto-stereoscopic display device comprises: multi-viewpoint stereo image rendering module 201, for obtain N viewpoint stereo-picture based on video image, N is more than or equal to 2 integer; Character graphics drafting module 202, for obtaining N width character graphics; Many viewpoints character graphics rendering module 203, for according to the Image Coding mode of auto-stereoscopic display device, plays up N width character graphics, obtains the three-dimensional character graphics of N viewpoint; Display module 204, for being presented at three-dimensional N viewpoint character graphics the relevant position of N viewpoint stereo-picture.
In one embodiment, character graphics drafting module 202 obtains a character graphics specifically for the captions character edge figure on subtitle file or video image based on video image; Copy N-1 width character graphics based on character graphics, obtain N width character graphics, wherein, the displacement of adjacent two width character graphicss is the first displacement.
In another embodiment, in the time that the captions character edge figure based on video image obtains a character graphics, multi-viewpoint stereo image rendering module 201 is filled except the white space of captions character edge figure specifically for video image is got on, and obtains video image after treatment; Obtain the depth information of video image after treatment; And take video image after treatment as benchmark image, according to depth information, play up according to the Image Coding mode of auto-stereoscopic display device, obtain N viewpoint stereo-picture.
Further, character graphics drafting module 202 is specifically for filling to obtain character graphics to captions character edge figure.
In another embodiment, in the time that video image is 2 viewpoint 3D video image, character graphics drafting module 202 is concrete also for obtain the parallax value of captions character edge figure from 2 viewpoint 3D video images; Determine the first displacement according to parallax value.
Further, in the time that the captions character edge figure based on video image obtains a character graphics, also comprise: many viewpoints character graphics locating module, expand ratio and vertical resolution expansion ratio for resolution extension to the required horizontal resolution of the full frame resolution of the display of auto-stereoscopic display device of calculating benchmark image; According to horizontal resolution expansion ratio and vertical resolution expansion ratio to captions character edge figure the first coordinate position in video image adjust, obtain the second coordinate position, the second coordinate position is relevant position.
In one embodiment, in the time that the subtitle file based on video image obtains a character graphics, multi-viewpoint stereo image rendering module 201 is specifically for obtaining the depth information of video image; According to depth information and video image, play up according to the Image Coding mode of auto-stereoscopic display device, obtain N viewpoint stereo-picture.
In another embodiment, character graphics drafting module 202 specifically for based on arrange font and/or font size by the captioned test changed figure in subtitle file.
Various variation patterns in stereo display method in earlier figures 1 embodiment and instantiation are equally applicable to the auto-stereoscopic display device of the present embodiment, by the aforementioned detailed description to stereo display method, those skilled in the art can clearly know the implementation method of auto-stereoscopic display device in the present embodiment, so succinct for specification, is not described in detail in this.
The one or more technical schemes that provide in the embodiment of the present invention, at least have following technique effect or advantage:
The stereo display method providing in an embodiment of the present invention, obtains N viewpoint stereo-picture based on video image, and N is more than or equal to 2 integer; Obtain N width character graphics; According to the Image Coding mode of described auto-stereoscopic display device, play up described N width character graphics, obtain the three-dimensional character graphics of N viewpoint; Three-dimensional described N viewpoint character graphics is presented on the relevant position of described N viewpoint stereo-picture.Also, in the present embodiment, captions are separated with video image, process respectively, so can avoid occurring the problem of captions marginal distortion.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt complete hardware implementation example, completely implement software example or the form in conjunction with the embodiment of software and hardware aspect.And the present invention can adopt the form at one or more upper computer programs of implementing of computer-usable storage medium (including but not limited to magnetic disc store and optical memory etc.) that wherein include computer usable program code.
The present invention is with reference to describing according to flow chart and/or the block diagram of the method for the embodiment of the present invention, equipment (system) and computer program.Should understand can be by the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or the combination of square frame.Can provide these computer program instructions to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, the instruction that makes to carry out by the processor of computer or other programmable data processing device produces the device for realizing the function of specifying at flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be stored in energy vectoring computer or the computer-readable memory of other programmable data processing device with ad hoc fashion work, the instruction that makes to be stored in this computer-readable memory produces the manufacture that comprises command device, and this command device is realized the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make to carry out sequence of operations step to produce computer implemented processing on computer or other programmable devices, thereby the instruction of carrying out is provided for realizing the step of the function of specifying in flow process of flow chart or multiple flow process and/or square frame of block diagram or multiple square frame on computer or other programmable devices.
Obviously, those skilled in the art can carry out various changes and modification and not depart from the spirit and scope of the present invention the present invention.Like this, if within of the present invention these are revised and modification belongs to the scope of the claims in the present invention and equivalent technologies thereof, the present invention is also intended to comprise these changes and modification interior.
Claims (14)
1. a stereo display method, is applied to an auto-stereoscopic display device, it is characterized in that, described method comprises:
Obtain N viewpoint stereo-picture based on video image, N is more than or equal to 2 integer;
Obtain N width character graphics;
According to the Image Coding mode of described auto-stereoscopic display device, play up described N width character graphics, obtain the three-dimensional character graphics of N viewpoint;
Three-dimensional described N viewpoint character graphics is presented on the relevant position of described N viewpoint stereo-picture.
2. the method for claim 1, is characterized in that, described in obtain N width character graphics and specifically comprise:
Captions character edge figure on subtitle file based on described video image or described video image obtains a character graphics;
Copy N-1 width character graphics based on described character graphics, obtain described N width character graphics, wherein, the displacement of adjacent two width character graphicss is the first displacement.
3. method as claimed in claim 2, is characterized in that, in the time that the captions character edge figure based on described video image obtains a character graphics, described based on described video image acquisition N viewpoint stereo-picture, comprising:
Described video image is got on and filled except the white space of captions character edge figure, obtain video image after treatment;
Obtain the depth information of described video image after treatment;
Take described video image after treatment as benchmark image, according to described depth information, play up according to the Image Coding mode of described auto-stereoscopic display device, obtain described N viewpoint stereo-picture.
4. method as claimed in claim 2 or claim 3, is characterized in that, the described captions character edge figure based on described video image obtains a character graphics, is specially:
Described captions character edge figure is filled to obtain described character graphics.
5. method as claimed in claim 2 or claim 3, is characterized in that, in the time that described video image is 2 viewpoint 3D video image, determines described the first displacement by following steps:
From described 2 viewpoint 3D video images, obtain the parallax value of described captions character edge figure;
Determine described the first displacement according to described parallax value.
6. method as claimed in claim 2, is characterized in that, in the time that the captions character edge figure based on described video image obtains a character graphics, determines described relevant position by following steps:
Calculate the resolution extension of benchmark image to the full frame resolution of the display of described auto-stereoscopic display device required horizontal resolution expansion ratio and vertical resolution expansion ratio;
According to described horizontal resolution expansion ratio and described vertical resolution expansion ratio to described captions character edge figure the first coordinate position in described video image adjust, obtain the second coordinate position, described the second coordinate position is described relevant position.
7. method as claimed in claim 2, is characterized in that, in the time that the subtitle file based on described video image obtains a character graphics, described based on described video image acquisition N viewpoint stereo-picture, comprising:
Obtain the depth information of described video image;
According to described depth information and described video image, play up according to the Image Coding mode of described auto-stereoscopic display device, obtain described N viewpoint stereo-picture.
8. an auto-stereoscopic display device, is characterized in that, comprising:
Multi-viewpoint stereo image rendering module, for obtain N viewpoint stereo-picture based on video image, N is more than or equal to 2 integer;
Character graphics drafting module, for obtaining N width character graphics;
Many viewpoints character graphics rendering module, for according to the Image Coding mode of described auto-stereoscopic display device, plays up described N width character graphics, obtains the three-dimensional character graphics of N viewpoint;
Display module, for being presented at three-dimensional described N viewpoint character graphics the relevant position of described N viewpoint stereo-picture.
9. auto-stereoscopic display device as claimed in claim 8, is characterized in that, described character graphics drafting module obtains a character graphics specifically for the captions character edge figure on the subtitle file based on described video image or described video image; Copy N-1 width character graphics based on described character graphics, obtain described N width character graphics, wherein, the displacement of adjacent two width character graphicss is the first displacement.
10. auto-stereoscopic display device as claimed in claim 8 or 9, it is characterized in that, in the time that the captions character edge figure based on described video image obtains a character graphics, multi-viewpoint stereo image rendering module is filled except the white space of captions character edge figure specifically for described video image is got on, and obtains video image after treatment; Obtain the depth information of described video image after treatment; And take described video image after treatment as benchmark image, according to described depth information, play up according to the Image Coding mode of described auto-stereoscopic display device, obtain described N viewpoint stereo-picture.
11. auto-stereoscopic display devices as claimed in claim 8 or 9, is characterized in that, described character graphics drafting module is specifically for filling to obtain described character graphics to described captions character edge figure.
12. auto-stereoscopic display devices as claimed in claim 8 or 9, it is characterized in that, in the time that described video image is 2 viewpoint 3D video image, described character graphics drafting module is concrete also for obtain the parallax value of described captions character edge figure from described 2 viewpoint 3D video images; Determine described the first displacement according to described parallax value.
13. auto-stereoscopic display devices as claimed in claim 9, is characterized in that, in the time that the captions character edge figure based on described video image obtains a character graphics, also comprise:
Many viewpoints character graphics locating module, expands ratio and vertical resolution expansion ratio for resolution extension to the required horizontal resolution of the full frame resolution of the display of described auto-stereoscopic display device of calculating benchmark image; According to described horizontal resolution expansion ratio and described vertical resolution expansion ratio to described captions character edge figure the first coordinate position in described video image adjust, obtain the second coordinate position, described the second coordinate position is described relevant position.
14. auto-stereoscopic display devices as claimed in claim 9, is characterized in that, in the time that the subtitle file based on described video image obtains a character graphics, described multi-viewpoint stereo image rendering module is specifically for obtaining the depth information of described video image; According to described depth information and described video image, play up according to the Image Coding mode of described auto-stereoscopic display device, obtain described N viewpoint stereo-picture.
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| CN107613405A (en) * | 2017-09-30 | 2018-01-19 | 福州瑞芯微电子股份有限公司 | A kind of VR video captions display methods and device |
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| US10582269B2 (en) | 2014-07-11 | 2020-03-03 | Lg Electronics Inc. | Method and device for transmitting and receiving broadcast signal |
| WO2023230965A1 (en) * | 2022-06-01 | 2023-12-07 | 京东方科技集团股份有限公司 | Display method and device |
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