CN109547763A - The real parallax real-time control method of the solid of virtual reality system - Google Patents
The real parallax real-time control method of the solid of virtual reality system Download PDFInfo
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- CN109547763A CN109547763A CN201710606166.1A CN201710606166A CN109547763A CN 109547763 A CN109547763 A CN 109547763A CN 201710606166 A CN201710606166 A CN 201710606166A CN 109547763 A CN109547763 A CN 109547763A
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- virtual
- parallax
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T19/00—Manipulating 3D models or images for computer graphics
- G06T19/20—Editing of 3D images, e.g. changing shapes or colours, aligning objects or positioning parts
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/50—Depth or shape recovery
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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
- H04N2013/0074—Stereoscopic image analysis
- H04N2013/0081—Depth or disparity estimation from stereoscopic image signals
Abstract
The real parallax real-time control method of the solid of virtual reality system proposed by the present invention, is related to technical field of virtual reality, the specific steps are；Specific steps are as follows: 1, by projective transformation virtual camera shooting visual angle calculate virtual camera focal length f；2, when user carries out virtual meal trip, according to the variation of viewpoint position and the layout of virtual scene, shooting distance D` and scene depth Δ D` is obtained in real time, while knowing current photographic base L；3, according to the above parameter, judge whether inequality meets, if not satisfied, the scene depth of current stereoscopic display alreadys exceed the field depth at viewing distance d known to then；4: position of the stereoscopic display space relative to screen can be controlled by pan view.The present invention controls the parallax of virtual scene stereoscopically displaying images in roaming, and the parallax being eventually displayed on projection screen is efficiently controlled in zone of reasonableness, brings true to nature while comfortable stereo vision experience to the user of virtual roaming.
Description
Technical field
The present invention relates to the solid real parallax real-time control sides of technical field of virtual reality, especially virtual reality system
Method.
Background technique
As an important branch of virtual reality, virtual roaming technology has the good property immersed, interactivity, in real time
Property.Compared to other roaming technologies, virtual roaming technology have more property of participation, more naturally, in recent years with its be in also virtual
The related fieldss such as museum, virtual tourism, virtual community receive the extensive concern of people.But in information input and identification
Aspect, still using conventional input devices such as keyboard, mouses, interactive means lack nature for the application of a large amount of virtual roamings at present
Property；Performance and output facet in information, although virtual scene in large size is shown by preferably playing empty after stereoscopic display
Quasi- roaming has the characteristics that height feeling of immersion, brings the stereo vision experience that people are true to nature, shake.But roaming body is carried out in user
During testing, it may occur that stereo image parallax is excessive and then causes the problem of stereoscopic vision fatigue.
Summary of the invention
The real parallax real-time control method of the solid of virtual reality system provided by the invention, with | it is tired to alleviate stereoscopic vision
The problem of labor.
The present invention specifically adopts the following technical scheme that realization:
A kind of real parallax real-time control method of the solid of virtual reality system, specific steps are as follows:
Step 1: when initial, it is known that the viewing distance d at stereoprojection scene calculates P according to above three formula+ max、P- max
With Δ PMAX；The focal length f of virtual camera is calculated by the shooting visual angle of virtual camera in projective transformation；Matched according to hardware system
It sets, it is seen that projection amplification coefficient S；
Step 2: when user carries out virtual meal trip, according to the variation of viewpoint position and the layout of virtual scene, obtaining in real time
Shooting distance D`And scene depth Δ D`, while knowing current photographic base L；
Step 3: according to the above parameter, judgement is differedWhether formula meets, and S is display amplification coefficient
S, value 100, if not satisfied, the scene depth of current stereoscopic display alreadys exceed the depth of field at viewing distance d known to then
Range needs to adjust the photographic base L between two virtual cameras, makes L≤(D '+Δ D ') D ' Δ PMAX/(ΔD′·
S·fc) to reduce the scene depth of entire stereoscopic display；
Step 4: judging inequalityIt is whether true, if so, the maximum negative parallax of stereo-picture known to then
In reasonable range, position of the stereoscopic display space relative to screen can be controlled by pan view；If not, then
The negative parallax for knowing stereo-picture has been more than the range of maximum negative parallax, needs to reduce parallax by pan view, wherein regarding
The value of figure translational movement A is it is required that final stereo image parallax meets following formula:
Then its value range isAfter the value for determining A, image in viewport transform function can be obtained
The pixel value a=A/S of translation
The real parallax real-time control method of the solid of virtual reality system provided by the invention, the beneficial effect is that: control
The parallax of virtual scene stereoscopically displaying images, is efficiently controlled in conjunction for the parallax being eventually displayed on projection screen in system roaming
Range is managed, brings true to nature while comfortable stereo vision experience to the user of virtual roaming.
Detailed description of the invention
Fig. 1 is viewpoint and scene layout's relation schematic diagram；
Fig. 2 is the real-time control procedure chart of stereoscopic parallax.
Specific embodiment
To further illustrate that each embodiment, the present invention are provided with attached drawing.These attached drawings are that the invention discloses one of content
Point, mainly to illustrate embodiment, and the associated description of specification can be cooperated to explain the operation principles of embodiment.Cooperation ginseng
These contents are examined, those of ordinary skill in the art will be understood that other possible embodiments and advantages of the present invention.In figure
Component be not necessarily to scale, and similar component symbol is conventionally used to indicate similar component.
Now in conjunction with the drawings and specific embodiments, the present invention is further described.
When stereo display technique is applied to virtual roaming, due to the randomness of user's Roam Path, virtual scene is opposite
It can also change with the change of viewpoint in the layout of virtual camera, as shown in Figure 1.In order to control virtual field in roaming
The parallax of scape stereoscopically displaying images needs to carry out parameter adjustment for the layout of current virtual scene in real time, thus by final
The parallax of display on the projection screen is efficiently controlled in zone of reasonableness, brings to the user of virtual roaming true to nature while comfortable
Stereoscopic vision body.
The parameter of human body be it is fixed, the reasonable term of reference of stereo image parallax by with the increase of viewing distance d and
Increase.Meanwhile positive parallax also needs to meet the interpupillary distance limitation of human eye, finally tends to two eye pupil pitch of holes l.Enable P+ maxFor positive parallax
Maximum value, P- maxFor the minimum value of negative parallax, then:
η is Snazzi degree, and standard value is 2.907 × 10-4。
η and l takes the standard value of normal adult, under the premise of the viewing of suitable human eye, the maximum value of Δ P are as follows:
In virtual reality scenario roaming, the real-time control method of the stereoscopic display parallax of the present embodiment is as follows:
Step 1: when initial, it is known that the viewing distance d at stereoprojection scene calculates P according to above three formula+ max、P- max
With Δ PMAX；The focal length f of virtual camera is calculated by the shooting visual angle of virtual camera in projective transformation；Matched according to hardware system
It sets, it is seen that projection amplification coefficient S；
Step 2: when user carries out virtual meal trip, according to the variation of viewpoint position and the layout of virtual scene, obtaining in real time
Shooting distance D` and scene depth Δ D`, while knowing current photographic base L；
Step 3: according to the above parameter, judgement is differedWhether formula meets, and S is display amplification coefficient
S, value 100, if not satisfied, the scene depth of current stereoscopic display alreadys exceed the depth of field at viewing distance d known to then
Range needs to adjust the photographic base L between two virtual cameras, makes L≤(D '+Δ D ') D ' Δ PMAX/(ΔD′·
S·fc) to reduce the scene depth of entire stereoscopic display；
Step 4: judging inequalityIt is whether true, if so, the maximum negative parallax of stereo-picture known to then
In reasonable range, position of the stereoscopic display space relative to screen can be controlled by pan view；If not, then
The negative parallax for knowing stereo-picture has been more than the range of maximum negative parallax, needs to reduce parallax by pan view, wherein regarding
The value of figure translational movement A is it is required that final stereo image parallax meets following formula:
Then its value range isAfter the value for determining A, image in viewport transform function can be obtained
The pixel value a=A/S of translation.
In the above process, the scene depth of stereoscopically displaying images is made to be suitble to the sight of human eye by adjusting photographic base L
It sees requirement, the screen effect out of entire scene is controlled by adjusting the value of view translational movement A, as shown in Figure 2.Pass through above-mentioned side
Method can make the virtual scene of roaming after stereoscopic display, relief with certain space while reducing solid again
The influence of visual fatigue, with viewpoint and shooting object spacing from reduction, stereo image parallax increase, it will more than human eye
Optimum range, and then deepen the degree of stereoscopic vision fatigue.By adjusting state modulator parallax, so that even if in viewpoint change
In the case of, the stereoscopic parallax of virtual scene can also be controlled in suitable range, help to alleviate stereoscopic vision fatigue
It influences.
Although specifically showing and describing the present invention in conjunction with preferred embodiment, those skilled in the art should be bright
It is white, it is not departing from the spirit and scope of the present invention defined by the appended claims, it in the form and details can be right
The present invention makes a variety of changes, and is protection scope of the present invention.
Claims (1)
1. a kind of real parallax real-time control method of the solid of virtual reality system, which is characterized in that specific steps are as follows:
Step 1: when initial, it is known that the viewing distance d at stereoprojection scene calculates P according to above three formula+ max、P- maxAnd Δ
PMAX；The focal length f of virtual camera is calculated by the shooting visual angle of virtual camera in projective transformation；It is configured according to hardware system, it can
Know projection amplification coefficient S；
Step 2: when user carries out virtual meal trip, according to the variation of viewpoint position and the layout of virtual scene, obtaining shooting in real time
Distance D` and scene depth Δ D`, while knowing current photographic base L；
Step 3: according to the above parameter, judgement is differedWhether formula meets, and S is display amplification coefficient S, takes
Value is 100, if not satisfied, the scene depth of current stereoscopic display alreadys exceed the field depth at viewing distance d known to then,
It needs to adjust the photographic base L between two virtual cameras, makes L≤(D '+Δ D ') D ' Δ PMAX/(ΔD′·S·fc)
To reduce the scene depth of entire stereoscopic display；
Step 4: judging inequalityIt is whether true, if so, the maximum negative parallax of stereo-picture is being closed known to then
In the range of reason, position of the stereoscopic display space relative to screen can be controlled by pan view；If not, known to then
The negative parallax of stereo-picture has been more than the range of maximum negative parallax, needs to reduce parallax by pan view, and wherein view is flat
The value of shifting amount A is it is required that final stereo image parallax meets following formula:
Then its value range isAfter the value for determining A, image translation in viewport transform function can be obtained
Pixel value a=A/S.
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| CN201710606166.1A CN109547763A (en) | 2017-07-24 | 2017-07-24 | The real parallax real-time control method of the solid of virtual reality system |
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| CN201710606166.1A CN109547763A (en) | 2017-07-24 | 2017-07-24 | The real parallax real-time control method of the solid of virtual reality system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057552A (en) * | 2019-04-23 | 2019-07-26 | 芋头科技（杭州）有限公司 | Virtual image distance measurement method, device, equipment and controller and medium |
| CN113379838A (en) * | 2021-08-16 | 2021-09-10 | 贝壳技术有限公司 | Method for generating roaming path of virtual reality scene and storage medium |
-
2017
- 2017-07-24 CN CN201710606166.1A patent/CN109547763A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110057552A (en) * | 2019-04-23 | 2019-07-26 | 芋头科技（杭州）有限公司 | Virtual image distance measurement method, device, equipment and controller and medium |
| CN113379838A (en) * | 2021-08-16 | 2021-09-10 | 贝壳技术有限公司 | Method for generating roaming path of virtual reality scene and storage medium |
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