CN103559713B - Method and terminal for providing augmented reality - Google Patents
Method and terminal for providing augmented reality Download PDFInfo
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- CN103559713B CN103559713B CN201310551040.0A CN201310551040A CN103559713B CN 103559713 B CN103559713 B CN 103559713B CN 201310551040 A CN201310551040 A CN 201310551040A CN 103559713 B CN103559713 B CN 103559713B
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Abstract
The invention discloses a method for providing augmented reality. The method for providing augmented reality includes the following steps that a terminal obtains images of a current scene through a camera and displays the images on a terminal screen; a target is determined to exist in the images of the current scene through detection; video content corresponding to the target is loaded; the video content is played; the position of the video at the current frame image is obtained; when the position of the frame image is larger than zero, the frame image is rendered and overlaid to the scene displayed on the terminal screen; along with the playing process of the video, the sequential frame image is updated, rendered and overlaid to the scene. The invention further discloses the terminal for providing augmented reality. By means of the method and terminal for providing augmented reality, a temporary black zone can be avoided when an augmented reality video is played at the beginning.
Description
Technical field
The present invention relates to augmented reality field, provide method and the terminal of augmented reality especially by playing video.
Background technology
Augmented reality (Augmented Reality is called for short AR), is the new technique grown up on the basis of virtual reality, is also referred to as mixed reality or the real border of expansion etc..It is that the information provided by computer system increases user's technology to real world perception, virtual information content is added in the scene of real world, thus realizes the enhancing to reality.Along with popularizing rapidly of the intelligent mobile terminal with photographic head, the application of various augmented realities also emerges in an endless stream, and is widely used in the fields such as amusement, life, medical science, advertisement and education.Planar target in augmented reality system typically has based on artificial labelling (Marker), and natural image, and the AR system of some advanced person also supports objective.In the presence of AR application is detected by photographic head and to have target in scene, can on the target area of display some virtual contents of superposition, if 3D model is modal form.
Along with three dimensional graphics progress on mobile terminals, some new terminals can support that output video frame picture renders as texture.There is AR application using the first frame picture of one section of video as target image at present, broadcasting video on the object region in the scene that terminal screen show, it is achieved to allow the magic effect that rest image moves up, be the form of expression of a kind of good augmented reality.But find in practice, if video is positioned at terminal local, general effect is the most fine, but during for real-time play Internet video, target area in scene there will be of short duration black region when commencing play out, although the time is comparatively short, but make the visual effect of augmented reality become discontinuous, have a strong impact on effect and the Consumer's Experience of augmented reality.Additionally for terminal local video, if video is relatively big, and do not have pre-loaded, but find to reload during target, picture is likely to there will be of short duration black region.As it is shown in figure 1, black color block areas 101 should be exactly the region that video playback shows in fact, the shape in region is usually tetragon, but is not necessarily rectangle, relevant with target position in the scene and attitude, is exactly target image under general area.
Although Internet video can be downloaded in advance, and pre-loaded video content, the appearance making black region becomes of short duration the most visible, but much there is substantial amounts of video content application scenario, can not be the most locally downloading, the most all load into, it is therefore necessary to the problem the most thoroughly solving to be likely to occur black region when AR video playback starts.
Summary of the invention
Based on the deficiencies in the prior art, the primary and foremost purpose of the present invention is to provide a kind of method providing augmented reality, it is to avoid of short duration when commencing play out video in the scene black region occur, especially plays Internet video.
Another object of the present invention is to provide a kind of terminal providing augmented reality, it is to avoid of short duration when commencing play out video in the scene black region occur, especially plays Internet video.
For realizing above-mentioned each purpose, the present invention adopts the following technical scheme that
The alleged method that augmented reality is provided of an object of the present disclosure, including step:
Terminal obtains current scene image by photographic head, and is shown on a terminal screen；
Target is detected in described current scene image；
Load the video content corresponding with described target；
Play described video content；
Obtain the position of described video present frame picture；
When the position of described frame picture is more than zero, just frame picture is rendered in the scene shown on the terminal screen that is added to；
Along with the playing progress rate of video, follow-up frame frame updating is rendered and is added in scene；
Described frame picture viewing area in the scene determines according to size and the current pose data of described target.
Further, after target being detected in described current scene image, a static images is rendered as texture and is added on the target area of scene；
Load the video content corresponding with playing described target simultaneously；
When the position of the frame picture of described video playback is more than zero, uses described frame of video picture to render and be added on the target area of scene.
Further, the type of described target is labelling, and described labelling includes black rectangle frame, comprises the one-dimensional bar code of inverse in a wherein edge regions of described black rectangle frame；
In the presence of target label having been detected in described current scene image, intercept the edge regions of the black rectangle frame of target label described in current scene image；
Described edge regions is first carried out inverse process, the most therefrom detects and resolve one-dimensional bar code；
Analysis result according to described bar code loads and plays the video content of correspondence；
When obtaining the position of frame picture of described video more than zero, frame picture is rendered on the target area being added in terminal demonstration scene.
Further, pre-setting the offset parameter of video area and target area, described offset parameter includes the dimension scale in relative target region, video area, and the offset vector of central point；
Target is detected in described current scene image, when the position of the frame picture playing video is more than zero, current location and default described offset parameter according to described target determine video area, are rendered by the frame picture of described video and show on the video area of relevant position that is added to.
Further, after described current scene image detects the target disappearance scheduled duration that described video is corresponding, suspend and play described video, and record the current location of video playback；
Follow-up when the target detecting that described video is corresponding reappears, continue to commence play out from the position recorded video, and the frame picture of described video is rendered display in the scene that is added to.
The alleged terminal that augmented reality is provided of the present invention the second purpose, including:
Augmented reality engine unit, for obtaining current scene image by photographic head, and shown on a terminal screen, target in detection current scene, notify in the presence of having target that video playback unit commences play out corresponding video, and the frame picture of the video provided by video playback unit renders and is added in scene；
Video playback unit, in the presence of target having been detected at augmented reality engine unit, corresponding video content is obtained by video frequency searching unit, load the video content corresponding with described target, play described video content, obtain the position of described video present frame picture, when the position of described frame picture is more than zero, by augmented reality engine unit, frame picture is rendered in the scene shown on the terminal screen that is added to, along with the playing progress rate of video, follow-up frame picture is rendered by the renewal of augmented reality engine unit and is added in scene；
Video frequency searching unit, retrieves corresponding video content for the target identification provided according to augmented reality engine unit from terminal local or server, and returns to video playback unit.
Further, after augmented reality engine unit detects target in described current scene image, one static images is rendered as texture and is added on the target area of scene, notice video playback unit loads the video content corresponding with playing described target simultaneously, when the position of the frame picture of described video playback is more than zero, the frame of video picture using described video playback unit to provide renders and is added on the target area of scene.
Further, also include bar code processing unit, the type of described target is labelling, described labelling includes black rectangle frame, the one-dimensional bar code of inverse is comprised in a wherein edge regions of described black rectangle frame, in the presence of augmented reality engine unit has detected target label in described current scene image, the edge regions of the black rectangle frame of target label described in current scene image is intercepted by bar code processing unit, described edge regions is first carried out inverse process, the most therefrom detect and resolve one-dimensional bar code, video playback unit loads and plays the video content of correspondence according to the analysis result of described bar code, when obtaining the position of frame picture of described video more than zero, frame picture is rendered on the target area being added in terminal demonstration scene by augmented reality engine unit.
Further, in described terminal, storage has the offset parameter pre-setting video area with target area, and described offset parameter includes the video area dimension scale relative to target area, and the offset vector of central point；
Augmented reality engine unit detects target in described current scene image, when the position of the frame picture playing video is more than zero, current location and default described offset parameter according to described target determine video area, are rendered by the frame picture of described video and show on the corresponding video area that is added to.
Further, after augmented reality engine unit detects the target disappearance scheduled duration that described video is corresponding in described current scene image, notice video playback unit suspends plays described video, and records the current location of video playback；
Follow-up augmented reality engine unit, when the target detecting that described video is corresponding reappears, continues notice video playback unit and commences play out video from the position recorded, and the frame picture that video playback unit provides renders display in the scene that is added to.
Compared with prior art, when the present invention is by loading and play video after augmented reality target being detected, whether the position according to frame of video picture is more than zero, judge that video the most really commences play out, reusable frame picture renders, thus the frame picture of video content just can be exported when starting, the black region without content is shown without of short duration, the effect making augmented reality is more perfect coherent, it is greatly improved Consumer's Experience, especially for playing Internet video online, even if network delay is the biggest, the phenomenon of of short duration black region also will not occur when video commences play out.Additionally the present invention can also be after finding target, and before frame of video picture renders display, first static images or Word message etc. of display, such user is during waiting video to be loaded, it can be seen that some relevant information contenies.The present invention combines also by by target label and bar code, can provide greater number of Online Video content in the case of target label limited amount.
Beneficial effects of the present invention is far above enumerates all main points in above-mentioned, repeats no more as space is limited.Need further it is emphasised that: other any technological change because being caused thinking the realization of the i.e. technical scheme of gained alleged by the present invention, and with the beneficial effect caused by this change, though not recording in plain text at this, being all belonging to one of ordinary skilled in the art and commercial field personnel can deduce.
With specific embodiment, the present invention is specifically described below in conjunction with the accompanying drawings.
Accompanying drawing explanation
There is the schematic diagram of of short duration black region in Fig. 1 when being and commence play out augmented reality video in prior art；
Fig. 2 provides the method flow diagram of augmented reality for the embodiment of the present invention；
Fig. 3 is the indicia patterns that the embodiment of the present invention comprises one-dimensional bar code；
Fig. 4 provides the terminal structure schematic diagram of augmented reality for the embodiment of the present invention.
Detailed description of the invention
The method providing augmented reality alleged by the present invention, can apply in the various intelligent terminal with photographic head, such as smart mobile phone, panel computer, intelligent television, game machine, intelligent glasses or wrist-watch etc..
See Fig. 2, the schematic flow sheet of the method for augmented reality is provided for the embodiment of the present invention, mainly comprises the steps.
201, terminal obtains current scene image by photographic head, and is shown on a terminal screen.At this moment the content shown is typically all real reality scene, the same with preview screen during shooting photo, commonly referred to background video.
202, in current scene image, target is detected.The type of target can be labelling, it is also possible to be natural image.If natural image, typically require that it possesses enough characteristic points, be otherwise difficult to identified and follow the tracks of.Using the first frame picture of a video as target image, and in advance the mark of this target can be associated with video.
203, the video content corresponding with target is loaded.After identifying target, find the video content of correspondence according to the mark of target and load.Can also application start after the most pre-loaded, but so for video more bigger time the most improper.The most preferably on-demand loading video again after target being detected, also has when being switched to another one target (other videos corresponding), and the object video before can first discharging reloads new video, memory problem so can occurs.
Generally load networks video council needs the long period, therefore when loading, can show a progress icon, such as the progress circle etc. rotated, when starting frame of display video picture, hides progress icon.Generally use Asynchronous loading to prepare the mode of video, after loading successfully, in readjustment formula, commence play out corresponding video.Also this video is associated with three-D grain while loading, in order to follow-up can be by frame of video frame updating to exporting on the scene areas rendered.
204, video content is play.For Internet video, although loading successfully, but being not meant to can output frame picture immediately, owing to the transmission of frame data requires time for, updating in scene if therefore directly exported by the present frame picture of object video when commencing play out, may arise that the phenomenon of black region, the duration of appearance is relevant with the situation of network and video attribute, some HD videos are in the case of network is poor, it may appear that the black region of long period.So now can't more new frame picture, render in the scene.
205, the position of video present frame picture is obtained.In the circulation thread that interface is drawn, obtain the position of the present frame picture playing video.When initial, the position of frame picture can be set to negative value, such as-1.
206, when the position of frame of video picture is more than zero, just frame picture is rendered in the scene shown on the terminal screen that is added to.At this moment the frame picture obtained will not occur black region again, but the content of video.
The most before this, after target being detected in current scene image, a static images can be rendered as texture and be added on the target area of scene, load the video content corresponding with playing target simultaneously.As a transparent photo frame picture can be used to be added on target area, the outside of the target image that user sees has added individual photo frame.In this period of waiting time, except display static images, still show some dynamic specially good effects, as made color change etc. of occurrence dynamics when rendering of target area；Word message etc. can also be shown.
207, along with the playing progress rate of video, follow-up frame frame updating is rendered and is added in scene.Note that the restriction of terminal system performance, it is not that all frames of video all can be updated output in scene, from the point of view of original video content, in AR application, the frame picture of display is not continuous print, but have certain interval, but this is substantially without there being the biggest impact, do not have the most discontinuous sense In the view of user.
Frame of video picture viewing area in the scene determines according to size and the current pose data of target.The target area in the video area i.e. viewing area of frame of video picture and scene generally all can be allowed overlapping, so can realize allowing the magic effect that the target image in picture moves up.Video pictures and target area perfectly can be coincided together, even if the position of photographic head changes always by data such as the targeted attitude matrixes that augmented reality engine provides, it is also possible to persistently follow the tracks of and keep coincidence status.
Many times using labelling convenient simpler than natural image as target, but the quantity of usual labelling is very limited amount of, if sum is 512, if so there being substantial amounts of online Internet video, the quantity of labelling is the most much of that.
As shown in Figure 3, it is possible to use include the labelling of black rectangle frame 301, the distinguishing characteristics of labelling is mainly determined by the sawtooth 302 at edge, comprises the one-dimensional bar code 303 of inverse in a wherein edge regions of black rectangle frame 301；In the presence of target label having been detected in current scene image, intercept the edge regions of the black rectangle frame of target label in current scene image；Opposite edge zones first carries out inverse process, the most therefrom detects and resolves one-dimensional bar code；Analysis result according to bar code loads and plays the video content of correspondence；When obtaining the position of frame picture of video more than zero, frame picture is rendered on the target area being added in terminal demonstration scene.
The form of one-dimensional bar code is a lot, such as UPC-A and UPC-E, EAN-8 and EAN-13, Code 39, Code 93, Code 128 etc..If system limits in advance can only use certain format barcode, detection speed can ratio comparatively fast.If in order to more flexible, it is also possible to do not limit, but the form traveling through various bar code detects one by one and resolves, if successfully parsing result just stop detection.
The region additionally playing video might not be completely superposed with target area, the frame inner region of indicia framing as shown in Figure 3, comprises image 304, is only video area, less than target area (whole indicia framing).Can pre-set the offset parameter of video area and target area, offset parameter includes the dimension scale in relative target region, video area, and the offset vector of central point；Target is detected in current scene image, when the position of the frame picture playing video is more than zero, current location and default offset parameter according to target determine video area, are rendered by the frame picture of video and show on the video area of relevant position that is added to.
If terminal camera is removed from target, after current scene image detects the target disappearance scheduled duration that described video is corresponding, such as 3 seconds, suspend and play described video, and record the current location of video playback；Follow-up when the target detecting that this video is corresponding reappears, continue to commence play out from the position recorded video, and the frame picture of this video is rendered display in the scene that is added to.
Those of ordinary skill in the art it is also understood that, realize all or part of step in said method embodiment to can be by program and complete to instruct relevant hardware, described program can be stored in a computer read/write memory medium, described storage medium, may is that ROM/RAM, magnetic disc, solid state hard disc, storage card or CD etc..
Describing a kind of terminal providing augmented reality in another embodiment of the present invention, as shown in Figure 4, this terminal includes photographic head and display screen etc., also includes:
Augmented reality engine unit 401, for obtaining current scene image by photographic head, and shown on a terminal screen, target in detection current scene, notify that video playback unit 402 commences play out corresponding video in the presence of having target, and the frame picture of the video provided by video playback unit 402 renders and is added in scene；
Video playback unit 402, in the presence of target having been detected at augmented reality engine unit 401, the video content answered is obtained by video frequency searching unit 403, load the video content corresponding with described target, play described video content, obtain the position of described video present frame picture, when the position of described frame picture is more than zero, by augmented reality engine unit 401, frame picture is rendered in the scene shown on the terminal screen that is added to, playing progress rate along with video, follow-up frame picture is updated to render by augmented reality engine unit 401 and is added in scene by video playback unit 402；
Video frequency searching unit 403, retrieves corresponding video content for the target identification provided according to augmented reality engine unit 401 from terminal local or server, and returns to video playback unit 402.
During owing to playing online Internet video, generally all can there is the delay of the most several seconds, after augmented reality engine unit 401 can detect target in current scene image, one static images is rendered as texture and is added on the target area of scene, notice video playback unit 402 loads the video content corresponding with playing target simultaneously, when the position of the frame picture of video playback is more than zero, the frame of video picture using video playback unit 402 to provide renders and is added on the target area of scene.
When using labelling as target, in order to provide more Online Video content, can be in conjunction with bar codes technique.Terminal can also include bar code processing unit, the type of target is labelling, labelling includes black rectangle frame, the one-dimensional bar code of inverse is comprised in a wherein edge regions of black rectangle frame, in the presence of augmented reality engine unit has detected target label in current scene image, the edge regions of the black rectangle frame of target label in current scene image is intercepted by bar code processing unit, opposite edge zones first carries out inverse process, the most therefrom detect and resolve one-dimensional bar code, video playback unit loads and plays the video content of correspondence according to the analysis result of bar code, when obtaining the position of frame picture of video more than zero, frame picture is rendered on the target area being added in terminal demonstration scene by augmented reality engine unit.
Video area can be different with target area, and storage has the offset parameter of video area and the target area pre-set in the terminal, and offset parameter includes the dimension scale in relative target region, video area, and the offset vector of central point；Augmented reality engine unit detects target in current scene image, when the position of the frame picture playing video is more than zero, current location and default described offset parameter according to target determine video area, are rendered by the frame picture of video and show on the video area of relevant position that is added to.
After additionally augmented reality engine unit detects the target disappearance scheduled duration that video is corresponding in current scene image, can notify that video playback unit suspends and play video, and record the current location of video playback；Follow-up augmented reality engine unit, when the target detecting that video is corresponding reappears, continues notice video playback unit and commences play out video from the position recorded, and the frame picture that video playback unit provides renders display in the scene that is added to.
It is appreciated that based on present invention spirit, can have more embodiment；Mutually reasonable combination new embodiment can also be obtained between each embodiment above-mentioned, each step, unit；Above-mentioned unit arbitrarily can merge on the premise of being capable of common purpose, change membership, split, combine, and the embodiment of the present invention is not construed as limiting.The above disclosed presently preferred embodiments of the present invention that is only, certainly can not limit the interest field of the present invention, the equivalent variations therefore made according to scope of the present invention patent with this, still belong to the scope that the present invention is contained.
Claims (10)
1. the method that augmented reality is provided, it is characterised in that the method comprising the steps of:
Terminal obtains current scene image by photographic head, and is shown on a terminal screen；
Target is detected in described current scene image；
Load the video content corresponding with described target；
Play described video content；
Obtain the position of described video present frame picture；
When the position of described frame picture is more than zero, just frame picture is rendered on the terminal screen that is added to and show
Scene in；
Along with the playing progress rate of video, follow-up frame frame updating is rendered and is added in scene；
Described frame picture viewing area in the scene is true according to size and the current pose data of described target
Fixed.
Method the most according to claim 1, it is characterised in that detected in described current scene image
After target exists, a static images is rendered as texture and is added on the target area of scene；
Load the video content corresponding with playing described target simultaneously；
When the position of the frame picture of described video playback is more than zero, described frame of video picture is used to render folded
It is added on the target area of scene.
Method the most according to claim 1, it is characterised in that the type of described target is labelling, described mark
Note includes black rectangle frame, comprises the one of inverse in a wherein edge regions of described black rectangle frame
Dimension bar code；
In the presence of target label having been detected in described current scene image, intercept in current scene image
The edge regions of the black rectangle frame of described target label；
Described edge regions is first carried out inverse process, the most therefrom detects and resolve one-dimensional bar code；
Analysis result according to described bar code loads and plays the video content of correspondence；
When obtaining the position of frame picture of described video more than zero, frame picture is rendered the terminal that is added to and shows
Show on the target area in scene.
4. according to the method described in any one in claims 1 to 3, it is characterised in that pre-set video area
Territory and the offset parameter of target area, described offset parameter includes the size in relative target region, video area
Ratio, and the offset vector of central point；
Target being detected in described current scene image, the position of the frame picture playing video is big
In zero time, current location and default described offset parameter according to described target determine video area,
The frame picture of described video is rendered and shows on the video area of relevant position that is added to.
5. according to the method described in any one in claims 1 to 3, it is characterised in that in described current scene
After image detects the target disappearance scheduled duration that described video is corresponding, suspend and play described video, and
The current location of record video playback；
Follow-up when the target detecting that described video is corresponding reappears, continue to open from the position recorded
Begin to play video, and the frame picture of described video is rendered display in the scene that is added to.
6. the terminal that augmented reality is provided, it is characterised in that described terminal includes:
Augmented reality engine unit, for obtaining current scene image by photographic head, and is shown
On terminal screen, the target in detection current scene, notify that video playback unit starts in the presence of having target
Play corresponding video, and the frame picture of the video provided by video playback unit renders and is added in scene；
Video playback unit, in the presence of augmented reality engine unit has detected target, by regarding
Frequently retrieval unit obtains corresponding video content, loads the video content corresponding with described target, plays described
Video content, obtains the position of described video present frame picture, when the position of described frame picture is more than zero,
By augmented reality engine unit, frame picture is rendered on the terminal screen that is added in the scene of display, along with regarding
The playing progress rate of frequency, is rendered follow-up frame picture by the renewal of augmented reality engine unit and is added in scene；
Video frequency searching unit, is used for the target identification according to the offer of augmented reality engine unit from terminal local
Or the video content that server retrieval is corresponding, and return to video playback unit.
Terminal the most according to claim 6, it is characterised in that augmented reality engine unit is in described current field
After scape image detects target, a static images is rendered, as texture, the scene that is added to
On target area, notice video playback unit loads the video content corresponding with playing described target simultaneously,
When the position of frame picture of described video playback is more than zero, use what described video playback unit provided to regard
Frequently frame picture renders and is added on the target area of scene.
Terminal the most according to claim 6, it is characterised in that also include bar code processing unit, described mesh
Target type is labelling, and described labelling includes black rectangle frame, at described black rectangle frame wherein
Comprising the one-dimensional bar code of inverse in one edge regions, augmented reality engine unit is at described current scene image
In target label detected in the presence of, bar code processing unit intercept mesh described in current scene image
The edge regions of the black rectangle frame of mark labelling, first carries out inverse process, the most therefrom to described edge regions
Detecting and resolve one-dimensional bar code, video playback unit loads according to the analysis result of described bar code and broadcasts
Being rivals in a contest the video content answered, when obtaining the position of frame picture of described video more than zero, augmented reality draws
Hold up unit to be rendered on the target area being added in terminal demonstration scene by frame picture.
Terminal the most according to claim 6, it is characterised in that in described terminal, storage pre-sets video
Region and the offset parameter of target area, described offset parameter includes that video area is relative to target area
Dimension scale, and the offset vector of central point；
Augmented reality engine unit detects target in described current scene image, plays video
The position of frame picture more than zero time, according to the current location of described target and default described skew ginseng
Number determines video area, is rendered by the frame picture of described video and shows on the corresponding video area that is added to.
10. according to the terminal described in any one in claim 6 to 9, it is characterised in that augmented reality engine list
After unit detects the target disappearance scheduled duration that described video is corresponding in described current scene image, notice
Video playback unit suspends plays described video, and records the current location of video playback；
Follow-up augmented reality engine unit, when the target detecting that described video is corresponding reappears, continues
Notice video playback unit commences play out video from the position recorded, and by the offer of video playback unit
Frame picture renders in the scene that is added to and shows.
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