CN101435989A - Tracking visual field and method for making three-dimensional film by secondary rendering - Google Patents
Tracking visual field and method for making three-dimensional film by secondary rendering Download PDFInfo
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- CN101435989A CN101435989A CNA2007101245701A CN200710124570A CN101435989A CN 101435989 A CN101435989 A CN 101435989A CN A2007101245701 A CNA2007101245701 A CN A2007101245701A CN 200710124570 A CN200710124570 A CN 200710124570A CN 101435989 A CN101435989 A CN 101435989A
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Abstract
The invention discloses a method for tracing view field and manufacturing stereoscopic film by twice rendering. The method comprises the following steps: (1) using a spherical view field stereoscopic camera to trace and shoot image information observed by view field of human eyes, and rendering the shot image information through a computer; (2) using a digital projection device having the same optical characteristics as the camera to project an image to an actual projected screen position by same motion mode; (3) according to the principle of reversibility of an optical path, using a computer digital camera which has same optical characteristics as a field projector to record the image mapped on the actual screen position; and (4) in a real playhouse, projecting the image finally rendered in step (3) onto the field screen through the field projector by a screening device, and making audiences in the same motion mode when the spherical view field stereoscopic camera shoots, so that the effect of the image on the screen watched by the audiences in motion is same as the effect of the image watched by the audiences in real scene.
Description
Technical field
The invention belongs to three-dimensional digit motion picture technique field, relate to a kind of method of making three-dimensional film.
Background technology
Three-dimensional film is based on the basis of three-dimensional imaging, because two eyes of people are at a distance of 6-7 centimetre, about two eyes be two differentiated slightly images seeing from different perspectives when seeing object, brain is judged its definite degree of depth with these two the synthetic backs of image with parallax, thereby forms three-dimensional sensation.The conventional stereo film is to utilize right two video cameras of a first from left to take same scenery simultaneously, use two projectors during projection, respectively put a polariscope, the image of two polarized lights is shown simultaneously in screen, the direction of vibration of two polarized lights is mutually the right angle, when watching three-dimensional film, spectators put on special polariscope, the polarized light direction of vibration that two eyeglasses see through about it is orthogonal, can just can not pass through right eye by the polarized light of left eye, vice versa, and therefore, the eyeglass of left eye only allows the image of left video camera to pass through, and the eyeglass of right eye only allows the image of right-hand video camera to pass through, so before eyesly stereoeffect will occur.Because traditional three-dimensional film, the direction of parallax is changeless, as shown in Figure 1, if strictness theoretically, the stereoeffect of this fixedly parallax is inaccurate, except that the screen centre, the remainder picture is all inaccurate to the perspective relation of eyes, can not accurately reduce the stereoeffect of the scene of clapping.When in the theme park, digital three-dimensional movie theatre, other public place of entertainment, because spectators are in the motion, the relative position of people and screen may be in various states, and in most states, baseline all can not be parallel with screen, sees Fig. 2, spectators' position and visual angle are in constantly in mobile and the variation always, and the position of arenas projector and projecting direction can not be agreed with spectators, have only a row image of mute middle, and its perspective and parallax are only accurately; All not at Centromedian image, its perspective and parallax all have in various degree deviation, and extent of deviation is along with increasing from the distance of picture central authorities, and the stereoscopic sensation that spectators watch is just very poor.
Summary of the invention
The problem to be solved in the present invention provides a kind of when the spectators that watch the digital three-dimensional film are kept in motion, picture in the screen of being watched can accurately reduce the tram at object place in the scene, and size, size, angle and perspective relation all are correct, mutual relationship between the target also is correct, the effect the when effect that spectators watch the object scene in the screen is just come to real scene personally and watched these objects as spectators.
The present invention solves the problems referred to above by the following technical solutions: the method for a kind of tracking field of view and making three-dimensional film by secondary rendering may further comprise the steps:
(1), utilize ball-type visual field stereo camera, track up human eye visual field is observed to stereo image information, and plays up photographic images information by computing machine; (2), utilize the optical characteristics digital projection device identical with above-mentioned video camera, and when taking with above-mentioned video camera identical mode of motion, project image onto the screen position of actual projection; (3), according to the light path principle of reversibility, use the image that the actual screen position is shone upon under the computer digit camera record with on-the-spot projector same optical properties, this process is a secondary rendering; (4), in real arenas, projecting device projects to the image of final rendering in (3) step on the on-the-spot screen by on-the-spot projector, and the mode of motion of the mode of motion when allowing spectators watch when taking with ball-type visual field stereo camera is identical, the image effect that spectators in moving like this see on screen is come to the effect that real scene is watched personally as spectators.
The method of tracking field of view and making three-dimensional film by secondary rendering preferably includes following steps:
(1), utilizes the ball-type visual field stereo camera of forming by the individual independently stereo camera of M * N, mode of motion according to spectators, and making ball-type visual field stereo camera identical all the time with the position and the direction of human eye visual field by programmed instruction, the track up human eye is looked around in 0～180 ° of scope in dead ahead observed to stereo image information up and down; Ball-type visual field stereo camera is taken the scene of M * N visual field direction of the observed domed region of following human eye, wherein M is the number of plies, N is the number of every layer of stereo camera, each stereo camera comprises two video cameras that are provided with according to position, the human eye left and right sides, and plays up the stereo image information of shooting by computing machine;
(2), identical mode of motion when taking with above-mentioned video camera, with the optical characteristics projection arrangement identical with above-mentioned video camera, to play up by computing machine and take the corresponding one by one screen position that projects to actual projection of the image of noting, and utilize digit optical camera lens model conversion to produce the image of playing up for the rending model of Computerized three-dimensional software, described projection arrangement is M * N * 2, wherein M is the number of plies, N * 2 are the number of every layer of projection arrangement, each projection arrangement is consistent with the visual field direction of corresponding each video camera, the center overlaps fully, and light path is reversible;
(3), according to the light path principle of reversibility, in the three-dimensional picture application software, ball-type visual field stereo camera is positioned over on-the-spot projector position, and the optical characteristics that guarantees ball-type visual field stereo camera is identical with on-the-spot projector, ball-type visual field stereo camera is noted the image that is shone upon on the actual screen position, and this process is a secondary rendering;
(4), in real arenas, projecting device projects to the image of final rendering in (3) step super wide-angle optical lens by on-the-spot projector on the on-the-spot screen, and the mode of motion of the mode of motion when allowing spectators watch when taking with ball-type visual field stereo camera is identical, the image effect that spectators in moving like this see on screen is come to the effect that real scene is watched personally as spectators.
Described ball-type visual field stereo camera preferably by 3 * 7 totally 21 independently stereo camera form, each stereo camera is made up of two video cameras.
Described projection arrangement is preferably 3 * 7 * 2 totally 42, and each projection arrangement is consistent with the visual field direction of corresponding each video camera, and the center overlaps fully, and light path is reversible.
The present invention relates to the film scene information approach that write down three-dimensional imaging, ball-type visual field stereo camera and a kind of visual field that is used for constantly changing at 3-dimensional digital three-dimensional film tracing positional and visual angle, the method of variation that comprises position, size, size, angle and the perspective relation of object in the scene makes effect when effect that spectators in moving watch the object scene in the screen is just watched these objects when mobile as spectators in real scene.Owing to used ball-type visual field stereo camera, in the scene arbitrarily the object of visual angle (in the hemisphere field range) always have corresponding with it camera points it, make it be imaged on the screen center position of this video camera, so just guaranteed that the volume rendering relation of the scene imaging in the whole field range is correct.Secondary rendering technology of the present invention then by following the tracks of the variation of perspective relation, is proofreaied and correct then and is reduced, and makes spectators in the motion when the picture that viewing location is fixedly generated in projector and the screen, and the perspective relation that spectators see is correct.Effect when like this, the effect of the stereoscopic picture plane watched of spectators is just come to real scene personally and watched these objects as spectators.When in the theme park, digital camera, other public place of entertainment use when of the present invention, spectators move in the scene of screen and true setting composition, picture in the screen and true setting combine, make spectators be immersed in the scene, where can't distinguish is where real setting is the picture in the screen, has extremely strong presence.
Description of drawings
Fig. 1 is a conventional stereo film imaging schematic diagram;
Fig. 2 is that the position of spectators and screen in the motion concerns;
Fig. 3 is the horizontal field of view figure of ball-type visual field video camera;
Fig. 4 is the vertical field of view figure of ball-type visual field video camera;
Fig. 5 is the skeleton view of ball-type visual field video camera;
Fig. 6 is the vertical view of scene example;
Fig. 7 is the skeleton view of scene example;
Fig. 8 is the location records image " people ";
Fig. 9 launches image in the position of " people " to screen;
Figure 10 is the image that shines upon on the location records sub-screen of " projector ";
Figure 11 is the picture under the location records of " people ";
Figure 12 is the picture of launching to screen in the position of " people ";
Figure 13 is the picture under the location records of projector;
Figure 14 is the position photographed scene of " people " among the embodiment;
Figure 15 is the image that the position photographed scene of " people " among the embodiment is become;
Figure 16 is the position photographed screen of " people " among the embodiment;
Figure 17 is the image that the position photographed screen of " people " among the embodiment is become;
Figure 18 is the same screen comparison diagram of Figure 15 and Figure 17.
Embodiment
For convenience of description, now ball-type visual field stereo camera is reduced to an independent video camera, illustrates with following simple scenario example:
Be illustrated in figure 6 as the scene vertical view, Fig. 7 is the skeleton view of scene.Wherein teapot is " object A ", and cube is " object B "; The below is " screen ", " track " is the arbitrary curve that is parallel to ground, the video camera of representative " people " moves along track, and target is pointed to " screen central point " all the time, the final on-the-spot projector that in arenas picture is projected in the screen of " projector " representative.
The first step: note the scene information of watching with spectators' visual angle, for this reason, place video camera in the position of " people ", the viewed image in visual field of record servant motion is seen Fig. 8.
Second step: because final arenas need project the image of scene in screen, therefore, reach from screen and see the image that size, size, angle and perspective relation are all correct, must be to the screen of reality projection in the viewed information mapping in the visual field of " people ", identical mode of motion when taking with above-mentioned video camera, with the optical characteristics projection arrangement identical with above-mentioned video camera, according to the light path principle of reversibility, to play up by computing machine and take the corresponding one by one screen position that projects to actual projection of the image of noting, see Fig. 9.
The 3rd step: according to the light path principle of reversibility, in the three-dimensional picture application software, use with the ball-type visual field stereo camera of actual arenas projector same optical properties and note the image that is shone upon on the actual screen position, ball-type visual field stereo camera is noted the image that is shone upon on the actual screen position, sees Figure 10.
Above-mentioned this process is exactly a secondary rendering, we just can trace into the variation of object perspective relation in the scene on the viewpoint of " people " by this method, stereoscopic picture plane in the screen that the underwriter saw can accurately reduce the tram at appearance object A and object B place, and size, size, angle and perspective relation all are correct, mutual relationship between the object also is correct, at last the effect when the image of screen projection secondary rendering just can allow effect that spectators watch the image in the screen just come to real scene personally and watch object A and object B as spectators.
When being photographic images as shown in figure 11, the scene picture of the shot by camera of " people " position.
Be according to the light path principle of reversibility as shown in figure 12, with the same position of the image under the camera record of people position, the situation when investing the screen position of actual projection with optical characteristics projector identical with video camera.
Figure 13 is the image on the screen under the location records of " projector ", i.e. the mapping of people's visual field in screen, and playing up specifically is exactly secondary rendering, and the image that obtains is exactly that we are used for actual arenas projection required image.
Result verification:
In order to check said method can realize purpose, carried out following test:
According to the light path principle of reversibility, use an optical characteristics and the identical projector of video camera of playing up Figure 13 that Figure 13 is projected in the screen in " projector " position, do twice from the position of " people " then and play up:
Play up for the first time object scene, this is the object scene of the reality seen of people, sees Figure 14 and Figure 15;
For the second time remove object scene, play up screen, Here it is, and spectators see it being screen at arenas, see Figure 16 and Figure 17.
Figure 18 is the same screen contrast of Figure 15 and Figure 17, from above-mentioned figure as can be seen: the position of two items is identical, and size, size, angle and perspective relation also all be identical, and the mutual relationship between the target also is identical.That is to say that the people watches the effect of the image in the screen, the effect when coming to real scene personally and watch object A with object B with spectators is the same.
The foregoing description uses the method for secondary rendering corrected perspective relation to be suitable for the video camera of optional position, therefore, concern it also is correct with the volume rendering of the stereoscopic picture plane of two video camera generations about identical with human eye, so, the picture that the ball-type visual field stereo camera that these video cameras are formed is generated also is to proofread and correct through correct perspective relation, and the volume rendering relation is correct.
Because it is about 150 ° that the visual field level of human eye contains the angle, vertically containing the angle is about 55 °; The optimal viewing angle of human eye is about: about 10 ° up and down in visual field direction, about horizontal direction 10 °; Distance between pupil of both eyes is: 55～74mm.Because people's eyes are positioned on the same horizontal line, the video camera of 60 ° of subtended angles can reflect the perspective of human eye really, so 0～180 ° field range 3 five equilibriums up and down, each part is 60 °, can simply simulate the effect of human eye when looking around scene up and down with the video camera of 3 60 ° of subtended angles; In the horizontal direction, because the interpupillary distance of human eye has 55mm～74mm, when the scene of looking around 0～180 ° about them, can produce continuous parallax and change, promptly the scene seen of right and left eyes has fine distinction.If we are still with 0～180 ° of visual field 3 five equilibrium of horizontal direction, the scene image of the right and left eyes that video camera is taken can produce and allow the saltus step of people's discomfort, so we must consider the best field range of human eye, get the higher value about 20 °, learn 0～180 ° of continuous visual field of horizontal direction thus, must simulate by 7 visual field directions, this is the continuous minimum number in visual field, learn thus, can use 7 visual field directions of level, vertical 3 visual field directions, totally 3 an x 7=21 visual field direction, simulate the continuous visual field direction of 0～180 ° of scope in spectators dead ahead, make the saltus step of the imperceptible visual field of beholder, simplified the model of visual field continuous integration simultaneously greatly.As Fig. 3 is the horizontal field of view figure of ball-type visual field video camera; Fig. 4 is the vertical field of view figure of ball-type visual field video camera; Fig. 5 is the skeleton view of ball-type visual field video camera; Therefore, described ball-type visual field stereo camera preferably by 3 * 7 totally 21 independently stereo camera form, each stereo camera is made up of two video cameras, described projector is preferably 3 * 7 * 2 totally 42, each projector is consistent with the visual field direction of corresponding each video camera, the center overlaps fully, and light path is reversible.
In real arenas, during projection, employed camera lens one is decided to be optical lens before the projector, and it is identical with the optical lens of video camera, it all is coaxial spherical optics system, if the visual angle of camera lens is just similar to the visual angle of human eye about 55 °, image transparent effect under taking meets the custom of human eye, feel vivid, nature, and the mode of motion of the mode of motion when allowing spectators watch when taking with ball-type visual field stereo camera is identical, the image effect that spectators in moving like this see on screen is come to the effect that real scene is watched personally as spectators.
Claims (4)
1, the method for a kind of tracking field of view and making three-dimensional film by secondary rendering is characterized in that, may further comprise the steps:
(1), utilize ball-type visual field stereo camera, track up human eye visual field is observed to stereo image information, and plays up photographic images information by computing machine; (2), utilize the optical characteristics digital projection device identical with above-mentioned video camera, and when taking with above-mentioned video camera identical mode of motion, project image onto the screen position of actual projection; (3), according to the light path principle of reversibility, use the image that the actual screen position is shone upon under the computer digit camera record with on-the-spot projector same optical properties, this process is a secondary rendering; (4), in real arenas, projecting device projects to the image of final rendering in (3) step on the on-the-spot screen by on-the-spot projector, and the mode of motion of the mode of motion that allows spectators watch when taking with ball-type visual field stereo camera is identical, the image effect that spectators in moving like this see on screen is come to the effect that real scene is watched personally as spectators.
2, the method for tracking field of view as claimed in claim 1 and making three-dimensional film by secondary rendering is characterized in that, may further comprise the steps:
(1), utilizes the ball-type visual field stereo camera of forming by the individual independently stereo camera of M * N, mode of motion according to spectators, and making ball-type visual field stereo camera identical all the time with the position and the direction of human eye visual field by programmed instruction, the track up human eye is looked around in 0～180 ° of scope in dead ahead observed to stereo image information up and down; Ball-type visual field stereo camera is taken the scene of M * N visual field direction of the observed domed region of following human eye, wherein M is the number of plies, N is the number of every layer of stereo camera, each stereo camera comprises two video cameras that are provided with according to position, the human eye left and right sides, and plays up the stereo image information of shooting by computing machine;
(2), identical mode of motion when taking with above-mentioned video camera, with the optical characteristics projection arrangement identical with above-mentioned video camera, to play up by computing machine and take the corresponding one by one screen position that projects to actual projection of the image of noting, and utilize digit optical camera lens model conversion to produce the image of playing up for the rending model of Computerized three-dimensional software, described projection arrangement is M * N * 2, wherein M is the number of plies, N * 2 are the number of every layer of projection arrangement, each projection arrangement is consistent with the visual field direction of corresponding each video camera, the center overlaps fully, and light path is reversible;
(3), according to the light path principle of reversibility, in the three-dimensional picture application software, ball-type visual field stereo camera is positioned over on-the-spot projector position, and the optical characteristics that guarantees ball-type visual field stereo camera is identical with on-the-spot projector, ball-type visual field stereo camera is noted the image that is shone upon on the actual screen position, and this process is a secondary rendering;
(4), in real arenas, projecting device projects to the image of final rendering in (3) step super wide-angle optical lens by on-the-spot projector on the on-the-spot screen, and the mode of motion of the mode of motion that allows spectators watch when taking with ball-type visual field stereo camera is identical, the image effect that spectators in moving like this see on screen is come to the effect that real scene is watched personally as spectators.
3, the method for tracking field of view as claimed in claim 2 and making three-dimensional film by secondary rendering is characterized in that, described ball-type visual field stereo camera by 3 * 7 totally 21 independently stereo camera form, each stereo camera is made up of two video cameras.
4, the method for tracking field of view as claimed in claim 2 and making three-dimensional film by secondary rendering, it is characterized in that described projection arrangement is 3 * 7 * 2 totally 42, each projection arrangement is consistent with the visual field direction of corresponding each video camera, the center overlaps fully, and light path is reversible.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104345526A (en) * | 2014-05-14 | 2015-02-11 | 黄少云 | Projection imaging method and system |
| WO2019153783A1 (en) * | 2018-02-08 | 2019-08-15 | 华南理工大学 | Dynamic dance image capture and restoration system based on flexible sensor, and control method |
| CN110133958A (en) * | 2019-05-21 | 2019-08-16 | 广州悦享环球文化科技有限公司 | A kind of tracking system and method for three-dimensional film |
| WO2021147749A1 (en) * | 2020-01-20 | 2021-07-29 | 北京芯海视界三维科技有限公司 | Method and apparatus for realizing 3d display, and 3d display system |
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| CN111540247B (en) * | 2018-07-26 | 2021-11-02 | 孙昕潼 | In-set room and seat structure of media interview scene rendering system and interview method |
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| CN86202307U (en) * | 1986-04-24 | 1988-03-09 | 石传竹 | Multi-functional stereoscopic screen and image display system |
| JP2001142166A (en) * | 1999-09-15 | 2001-05-25 | Sharp Corp | 3d camera |
| CN1152348C (en) * | 2001-02-28 | 2004-06-02 | 深圳华强智能技术有限公司 | Method for making digital circular screen stereo movia |
| CN100418009C (en) * | 2005-06-20 | 2008-09-10 | 钟明 | Digital ball-screen cinema making method |
| CN100552539C (en) * | 2006-01-10 | 2009-10-21 | 钟明 | A kind of act method for making of three-dimensional film image of encircling |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104345526A (en) * | 2014-05-14 | 2015-02-11 | 黄少云 | Projection imaging method and system |
| WO2019153783A1 (en) * | 2018-02-08 | 2019-08-15 | 华南理工大学 | Dynamic dance image capture and restoration system based on flexible sensor, and control method |
| CN110133958A (en) * | 2019-05-21 | 2019-08-16 | 广州悦享环球文化科技有限公司 | A kind of tracking system and method for three-dimensional film |
| WO2021147749A1 (en) * | 2020-01-20 | 2021-07-29 | 北京芯海视界三维科技有限公司 | Method and apparatus for realizing 3d display, and 3d display system |
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Address after: 518057, 14 floor, Huaqiang hi tech development building, Nanshan District science and technology, Shenzhen, Guangdong Patentee after: Huaqiang infante (Shenzhen) Film Co. Ltd. Address before: 518031, 22-24 floor, building A, Huaqiang Building, No. 3006 Shennan Middle Road, Shenzhen, Guangdong Patentee before: Shenzhen Hyvision Digital Film Inc. |