TWI515691B - Composition video producing method by reconstruction the dynamic situation of the capture spot - Google Patents

Description

Synthetic video shooting method for on-site dynamic situation reconstruction

The invention relates to a synthetic video shooting method for on-site dynamic situation reconstruction, in particular to a method for performing a keyboard composite shooting in a virtual reality studio while simultaneously projecting a pre-recorded outdoor or custom environment light source with a screen. A synthetic video production method that produces a lively dynamic situation reconstruction of a more realistic and natural image.

With the rapid improvement of computer computing power, Virtual Reality studio technology has been widely used in news, program production or wedding photography. For a simple example, the common broadcasters in the TV weather forecast stand in front of the large dynamic weather map, and cooperate with the content of the map to form a vivid and understandable effect. However, in the actual studio shooting operation, behind the broadcaster is only a curtain called the blue board or the green board (or the key board). The dynamic weather map seen on the TV screen is generated by computer animation in the studio. After shooting the broadcaster together with the keyboard image behind him, the Chroma-key technology is used to perform back-synthesis. The keyboard is partially removed and embedded in the computer animated weather map, which becomes a composite picture seen by the viewer on the TV screen. Or in another example, when a new person takes a wedding photo in the shed, the photographer stands in front of the key board for the photographer to perform the photographing work, and then performs the back-synthesis to remove the key board and embed the real shot. Natural or building images to achieve imagery like newcomers shooting outdoors. As for other common virtual reality studio applications, the performer (the subject) is more able to interact with the scene and then perform image synthesis.

With regard to virtual reality studio technology, its main advantages include the elimination of the cost of setting up the scaffolding and props, as well as the trouble and inconvenience of eliminating the need for personnel to shoot outdoors. However, one of the most important aspects of shooting images is light. Although the sheds are erected in the shed to provide a sufficient light source, the light source is still different from the light at the front of the outdoors, for example, the subject. The reflection on the face of the object will be illuminated by the light of the foreground of the subject. The intensity of the current scene will cause the reflection of the light on the face of the person being photographed. For example, when the foreground of the subject is flickering, the subject is photographed. The face of the character also produces a rapid change in light and dark colors. It is difficult for the shed lamp erected in the shed to reproduce the change of the dynamic light source of the foreground of the scened person, so that the image after the final synthesis cannot be as natural and realistic as the outdoor shooting.

In view of the above-mentioned problems of the prior art, the object of the present invention is to provide a synthetic video recording method for on-site dynamic situation reconstruction, so as to solve the fact that the synthetic video captured by the virtual reality studio is not as real as the outdoor shooting. problem.

According to the purpose of the present invention, a synthetic video recording method for on-site dynamic situation reconstruction is provided, which comprises the following steps: S11: at least one first camera device and at least one second camera device are installed in the field environment, and the first filming device And the second filming device constitutes a field environment catching device; the field environment catching device is used to respectively capture the dynamic situation of the scene in the environment of the object, such as using the first filming device to capture the background of the object to form a background The image, using the second camera to capture the foreground of the object to form a scene ambient light source image; wherein the background of the object may include a building, a natural environment, a person, an animal, an item, or a combination of the two or more. The camera target may include a person, an animal, an item, or a combination of the two or more.

Wherein, the first filming device can be multi-mirror filming, that is, the background of the object can be filmed by using a plurality of first filming devices to form a background image formed by multi-mirror filming.

Wherein, the second filming device may be an m*n group (m and n are positive integers), m is a horizontal resolution column number, and n is a straight resolution line number. For an undefined embodiment, when m=n= 1st, the second filming device may be a group; the second filming device forms a scene environment light source image for the center of the foreground of the object; or the second filming device may be 2 (m*n, m=1, n=2) group, these second filming devices respectively form a scene environment light source image for the left and right centers of the center of the foreground of the object; or the second filming device may be 4 (m*n, m= 2, n = 2) group, these second filming devices respectively form a scene environment light source image for the center of the four quadrants in the center of the foreground of the object; for the unrestricted embodiment, if the field environment light source reconstruction needs more At high resolution, Then m*n=6 or more can be used.

S12: reconstructing the dynamic situation of the scene by using an environment reconstruction device to form a dynamic reconstruction virtual environment, wherein the dynamic reconstruction virtual environment reconstructs the field ambient light source by using the dynamic illumination image; the environment reconstruction device includes at least one image playback device and a ring reflection The device, the at least one reconstructed image capturing device and a composite screen, wherein the dynamic lighting image is formed by playing the live ambient light source image on the ring-shaped reflecting device; wherein the synthetic screen can be a blue screen or a green screen The video playback device can use one or more video playback projectors or projectors, etc., and is limited to; the reconstructed image capture device can use one or more video capture devices, lighting auxiliary devices or playback. The device or the like is not limited; when the second filming device is 1 (m*n, m=n=1) group, the scene environment light source image formed by the second filming device is one group, then the image playing device Playing the scene environment light source image generated by the second filming device at the center of the ring type reflecting device; or when the second filming device is 2 (m*n, m=1, n=2) group, First The scene environment light source image formed by the filming device is two groups, and two sets of scene environment light source images are formed on the left and right centers of the foreground of the foreground of the object, and two groups of video playback devices can be used. Playing the scene environment light source image generated by the second filming device with the center of the ring type reflecting device as a mirror image symmetrically, that is, the first group of second film forming devices form a scene environment on the left side of the center of the foreground of the object The light source image, the first group of image playback devices are placed at the center of the ring-shaped reflecting device, and the right side of the foreground of the object is played to the left of the scene environment light source image, and the second group of second filming device is for the foreground of the object. The right side of the center forms the image of the scene ambient light source, and the second group of image playback devices is placed on the right side of the center of the foreground of the ring-shaped reflecting device to play the foreground of the object; the same is true when the second filming device It may be a group of 4 (m*n, m=2, n=2), and these second filming devices respectively form a scene environment light source image for the center of the four spots of the foreground of the object, respectively (1 , 1) The second filming device forms the (1, 1) group of the scene environment light source image, and the (1, 2) group second filming at the center of the (1, 1) analysis point of the center of the foreground of the object. The center of the (1, 2) analysis point of the center of the foreground of the object forms the scene environment image of the (1, 2) group, and the foreground of the second (2, 1) group of the second filming device The center of the (2,1) resolution point at the center forms the second (2,1) The scene environment light source image of the group, the second (2, 2) group second shooting device forms the scene environment light source image of the (2, 2) group at the center of the (2, 2) analysis point of the center of the foreground of the object. When the scene light source situation is reconstructed, the (i, j) group of the playback device is placed in the center of the ring-shaped reflection device to deflect the image of the field environment light source of the (i, j) group in the symmetric direction of the (i, j) group of the filming device.

The ring-shaped reflecting device can be a circular or concave mirror. For better results, the center of the ring-shaped reflecting device can be disposed in front of the shooting target shooting center (such as the face), and the set position can be the shooting target shooting center. The position of +30°~+60° above the horizontal direction is toward the camera target; wherein the angle is 0° at the center of the camera target, a positive angle toward the front, and a negative angle toward the front and the bottom.

Preferably, the annular reflecting device is formed by a plurality of mirror arrays arranged in an annular concave shape, and the mirror array is composed of a plurality of convex mirrors.

S13: setting a camera target in the dynamic reconstruction virtual environment, the dynamic illumination image is irradiated on the image capturing target, and simultaneously capturing the image capturing target located in front of the synthetic screen by the reconstructed image capturing device to generate an initial recording. S14: synthesizing the background image and the initial video, reconstructing the camera target image in the dynamic reconstruction virtual environment, and forming a composite video by shooting.

Further, the live dynamic situation can be added to the live sound, and the live environment capture device includes a sound capture device, and the sound capture device captures the live sound generated by the sound source of the environment in which the object is located; the dynamic reconstruction The virtual environment includes a dynamic sound, and the environment reconstruction device further includes a sounding device, wherein the dynamic sound is generated by the sound reproducing device reconstructing the live sound; and the reconstructed image capturing device records the dynamic sound to form a part of the initial video.

Further, the on-site dynamic situation may increase on-site air flow, and the on-site environmental capture device further includes a wind direction wind speed recording device, wherein the on-site air flow is generated by the wind direction wind speed recording device extracting air flow of the environment in which the object is located; The dynamic reconstruction virtual environment includes dynamic air flow, and the environmental reconstruction device includes a blower device, and the dynamic air flow is generated by the air blow device reconstructing the on-site air flow.

Further, the on-site dynamic situation can increase the on-site temperature and humidity index, and the on-site environment capture device includes a temperature and humidity extraction device, and the on-site temperature and humidity indicator is obtained by the temperature and humidity extraction device to extract the temperature of the environment in which the object is located. Produced by one or a combination of humidity; the dynamic weight The virtual environment includes a dynamic temperature and humidity indicator, and the environment reconstruction device includes an air conditioning device, and the dynamic temperature and humidity indicator is generated by the air conditioning device reconstructing the on-site temperature and humidity index.

Further, the live dynamic situation may increase physical movement information, and the on-site environment capture device further includes a motion detection device, wherein the physical movement information is generated by the motion detection device capturing the vibration or movement of the environment of the object. The dynamic reconstruction virtual environment includes dynamic movement, and the environment reconstruction device includes a mobile platform device generated by the mobile platform device to reconstruct the vibration or movement of the environment in which the on-site object is located.

According to another object of the present invention, a synthetic video recording method for dynamic scene reconstruction in the field is proposed, which can be used to first interact with the scene by using a virtual character, and then synthesize the camera target into a dynamic reconstruction virtual environment in the studio. A synthetic video that interacts with the scene to form a camera target. The method comprises the following steps: S21: at least one first filming device and at least one second filming device are set up in the on-site environment, the first filming device and the second filming device constitute a site environment capturing device; the on-site environment capturing device is used for respectively Taking a live dynamic situation in a environment in which a virtual character interacts with a live object, such as using the first camera to capture an image and background of the virtual character interacting with the live object to form a background image, using a second camera 撷The foreground of the virtual character interacting with the live object forms a live environment light source image; wherein the background of the object may include a building, a natural environment, a person, an animal, an item, or a combination of the two or more. The camera target may include a person, an animal, an item, or a combination of the two or more. The interaction between the virtual character and the live object may be such that the virtual character interacts with the live object, greets, interacts, etc., and is not limited.

The first filming device can be multi-mirror filming, that is, a plurality of first filming devices can be used to record the image and background of the virtual character interacting with the live object to form a background image formed by multi-mirror filming.

S22: reconstructing the dynamic situation of the scene by using an environment reconstruction device to form a dynamic reconstruction virtual environment, wherein the dynamic reconstruction virtual environment reconstructs the field ambient light source by using the dynamic illumination image; the environment reconstruction device includes at least one image playback device and a ring reflection a device, at least one reconstructed image capturing device and a composite screen, wherein the dynamic lighting image is formed by playing the live ambient light source image on the ring-shaped reflecting device; wherein the synthetic screen can be blue screen or green The video playback device can use one or more video playback projectors or projectors, etc., and is limited to; the reconstructed image capture device can use one or more video capture devices, lighting auxiliary devices or The sound device and the like are not limited; the ring-shaped reflecting device may be a ring-shaped or concave mirror, which is a better effect, and the center of the ring-shaped reflecting device may be disposed in front of the shooting target shooting center (such as the face). The position of the camera target is +30°~+60° above the level of the shooting center, and faces the camera target; wherein the angle is 0° at the center of the camera target, and the front angle is a positive angle , a negative angle toward the front and the bottom.

Preferably, the annular reflecting device is formed by a plurality of mirror arrays arranged in an annular concave shape, and the mirror array is composed of a plurality of convex mirrors.

S23: setting a camera target in the dynamic reconstruction virtual environment, the dynamic illumination image is irradiated on the image capturing target, and simultaneously capturing the virtual object interaction by capturing the image capturing target in front of the synthetic screen by using the reconstructed image capturing device The action is to generate an initial video; S24: the background image is removed from the virtual character image and synthesized into the initial video, and a synthetic video is formed by the shooting, so that the synthesized video can reconstruct the imaging target image in the dynamic reconstruction virtual In the environment, there is a synthetic video that mimics the interaction between virtual characters and the scene.

Further, the live dynamic situation may be added to the live sound, and the live environment capture device includes a sound capture device, and the sound capture device captures the live sound of the virtual character interacting with the scene; the dynamic reconstruction virtual environment includes The dynamic sounding device further includes a sounding device generated by the sound reproducing device reconstructing the live sound; the reconstructed image capturing device recording the dynamic sound to form a portion of the initial video.

Further, the on-site dynamic situation may increase on-site air flow, and the on-site environmental capture device further includes a wind direction wind speed recording device, wherein the on-site air flow is generated by the wind direction wind speed recording device extracting air flow of the environment in which the object is located; The dynamic reconstruction virtual environment includes dynamic air flow, and the environmental reconstruction device includes a blower device, and the dynamic air flow is generated by the air blow device reconstructing the on-site air flow.

Further, the live dynamic scenario may further include a physical mobile information, and the live environment capture device may further include a motion detection device, which may be captured by the motion detection device. The physical movement information generated by the vibration or movement of the environment in which the object is located can be used to collect the physical movement information for reconstruction of the dynamic reconstruction virtual environment. The dynamic reconstruction virtual environment may further comprise a dynamic mobile device, the environment reconstruction device further comprising a mobile platform device; the mobile platform device receiving the physical mobile information driving the mobile platform device to cause the mobile platform device to generate a vibration of the environment in which the simulated object is located or Move to rebuild the live entity move.

Further, the on-site dynamic situation can increase the on-site temperature and humidity index, and the on-site environment capture device includes a temperature and humidity extraction device, and the on-site temperature and humidity indicator is obtained by the temperature and humidity extraction device to extract the temperature of the environment in which the object is located. Or one of the humidity or a combination thereof; the dynamic reconstruction virtual environment includes a dynamic temperature and humidity indicator, and the environmental reconstruction device includes an air conditioning device, and the dynamic temperature and humidity indicator is generated by the air conditioning device reconstructing the on-site temperature and humidity index .

As described above, the synthetic video recording method of the on-site dynamic situation reconstruction of the present invention captures the ambient light source at the same time when the scene is pre-shooted outdoors, and captures the scene when shooting in the shed. The ambient light source is projected to reconstruct the light and shadow changes taken at the scene, so that the synthetic video after the key board is removed can be more realistic, so as to achieve the feeling of shooting outdoors, can be applied to tourism reproduction photography, carnival photography, Art creation photography, cultural creative photography or commemorative film photography (wedding images, etc.).

Moreover, the synthetic video recording method of the on-site dynamic situation reconstruction of the present invention enables a virtual character to perform subrogation shooting on the spot, and the virtual character can interact with the characters, facilities, animals, plants, etc. on the scene, such as dialogue, action interaction, Rotate the movement, etc., when shooting the scene, you can simultaneously capture the ambient light source, sound, wind, ambient temperature and humidity, vibration or movement at the same time, and when shooting in the shed, project the captured ambient light source Reconstruction, sound reconstruction, wind reconstruction, ambient temperature and humidity, vibration or motion reconstruction to reproduce the environmental changes of the scene shooting and the live interaction of the virtual characters, so that the synthetic video of the captured camera image after the key board is removed will be more Realizing, presenting more realistic changes in ambient light source, sound, wind, ambient temperature and humidity, vibration or movement and interaction with virtual characters to achieve more authenticity as if they were taken on-site.

S11~S14, S21~S24‧‧‧ steps

1‧‧‧Environmental capture device

11‧‧‧First filming device

12‧‧‧Second filming device

13‧‧‧Wind wind speed recording device

14‧‧‧Sound extraction device

15‧‧‧Warm and humidity extraction device

16‧‧‧Moving detection device

3‧‧‧Reconstruction of image processing equipment

4‧‧‧Ring Reflector

41‧‧‧Mirror array

411‧‧‧ convex mirror

5‧‧‧Synthesis

6‧‧‧Environmental reconstruction device

61‧‧‧Video playback device

62‧‧‧Air supply device

63‧‧‧Broadcasting device

64‧‧‧Air conditioning unit

65‧‧‧Mobile platform device

A‧‧‧ background image

B‧‧‧Site ambient light source image

C‧‧‧ camera target

D‧‧‧Synthesis video

L1‧‧‧ throwing distance

L2‧‧‧reflection distance

Spot _1,1 , Spot _1,2 , Spot _2,1 , Spot _2,2 ‧‧‧ Lighting area resolution point of the camera target

Cam _1,1 , Cam _1,2 , Cam _2,1 , Cam _2,2 ‧‧‧Reconstructed image capture unit

Pjtr _1,1 , Pjtr _1,2 , Pjtr _2,1 , Pjtr _2,2 ‧‧‧ Dynamic illumination that forms the projection

Figure 1 is the first method of synthetic video recording method for on-site dynamic situation reconstruction of the present invention. flow chart.

Fig. 2 is a schematic view showing an embodiment of a synthetic video recording method for on-site dynamic situation reconstruction of the present invention.

Figure 3 is a schematic diagram of the foreground of the captured object taken by the synthetic video recording method of the live dynamic situation reconstruction of the present invention.

Figure 4 is a schematic diagram of the dynamic scene reconstruction method of the dynamic scene reconstruction method of the present invention to form a dynamic reconstruction virtual environment.

Fig. 5 is a schematic diagram of the method for reconstructing a field ambient light using a dynamic illumination image by a synthetic video recording method for on-site dynamic situation reconstruction of the present invention.

Figure 6 is a schematic diagram of a composite image of a synthetic video recording method for on-site dynamic situation reconstruction of the present invention.

Figure 7 is a schematic view of a ring-shaped reflecting device of a synthetic video recording method for on-site dynamic situation reconstruction of the present invention.

Figure 8 is a schematic diagram of a synthetic optical recording method for real-time dynamic situation reconstruction of the present invention, which uses a ring-shaped reflecting device to generate a dynamic illumination image to reconstruct a field ambient light source.

Figure 9 is a schematic diagram of the dynamic scene reconstruction method of the dynamic scene reconstruction method of the present invention to form a dynamic reconstruction virtual environment.

Figure 10 is a schematic diagram of the method of reconstructing an image capturing apparatus for generating a preliminary recording by the synthetic video recording method of the live dynamic situation reconstruction of the present invention.

Figure 11 is a schematic diagram of a composite video recording method for on-site dynamic situation reconstruction of the present invention, which utilizes multiple sets of lenses to capture the foreground of the object and a plurality of sets of video playback devices to generate dynamic illumination images.

FIG. 12 is a schematic diagram of a method for reconstructing a field ambient light source by using a plurality of sets of image playing devices according to the method for synthesizing a video recording of a live dynamic situation reconstruction of the present invention.

Figure 13 is a schematic diagram of a composite video recording method for on-site dynamic situation reconstruction of the present invention. A plurality of sets of image playback devices are projected onto a ring-shaped reflecting device to generate a dynamic illumination image to reconstruct a field ambient light source.

Figure 14 is a second flow chart of a synthetic video recording method for on-site dynamic situation reconstruction of the present invention.

The technical features, contents, and advantages of the present invention, as well as the advantages thereof, can be understood by the present inventors, and the present invention will be described in detail with reference to the accompanying drawings. The subject matter is only for the purpose of illustration and description. It is not intended to be a true proportion and precise configuration after the implementation of the present invention. Therefore, the scope and configuration relationship of the attached drawings should not be interpreted or limited. First described.

Please refer to FIG. 1 . FIG. 1 is a first flowchart of a method for synthesizing a video recording of a live dynamic situation reconstruction according to the present invention. The process steps are as follows: Step S11: at least one first camera 11 is installed in the site environment. And at least one second filming device 12, the first filming device 11 and the second filming device 12 constitute a field environment capturing device 1; using the field environment capturing device 1 to capture the scene dynamic situation in the environment of the object; The dynamic scene includes a background image A and a scene environment light source image B. The background image A is generated by capturing the background of the object, and is formed by capturing the background of the object by using the first filming device 11; In order to capture the foreground environment in which the subject is located, the second filming device 12 is used to capture the foreground of the subject.

Please refer to FIG. 2 and FIG. 2 , which are schematic diagrams of an embodiment of a method for synthesizing a video recording method of a live dynamic situation reconstruction according to the present invention. The environment capturing device 1 is used for capturing the scene in the environment where the object is located. The dynamic situation, the environment capture device 1 includes a first camera device 11 and a second camera device 12. In a specific application, the first camera device 11 and the second camera device 12 can each use a wide-angle camera; A filming device 11 captures the background of the object to form a background image A, that is, the background image A is formed by recording as a wide-angle camera (the background is denoted by the symbol A for convenience of explanation in the drawing); using a wide-angle camera The second filming device 12 captures the scene environment light source image B formed by the foreground of the object, that is, the scene environment light source image B is formed by recording as a wide-angle camera (in the figure, for convenience of description, the foreground is marked as symbol B) ).

Please refer to FIG. 3 and FIG. 3 , which are diagrams showing the foreground of the captured object in the synthetic video recording method of the on-site dynamic situation reconstruction of the present invention. When the second imaging device 12 captures the foreground of the object, Good system to take the source of the ambient light source, as shown, to form the scene Ambient light source image B; for better photography techniques, the main light source can be set to the scene environment light source image B relative to the appropriate height of the object, which is more realistic; for example, the position of the sun is located When the second filming device 12 captures the foreground, the sun can be set to the upper right corner of the live environment light source image B.

The first filming device 11 can be multi-mirror filming, that is, the background of the object can be photographed using a plurality of first filming devices 11 to form a background image A formed by multi-mirror filming. The second camera 12 can be a group or a m*n group. If the second camera 12 is a group, the center of the foreground of the subject (the center of the main light source is the adjustment position) is formed. The scene environment light source image B; if the second filming device 12 can be a group of 2 (m*n, m=1, n=2), respectively, the left and right centers of the center of the foreground of the object (left) The center of the main source of light and the right side is the calibration position) to form a scene environment light source image B; if the second filming device is 4 (m*n, m=2, n=2, m is the horizontal resolution column) The number, n is the direct resolution number of rows) group, respectively, the four resolution spots of the center of the foreground of the subject are photographed to form a live ambient light source image B.

In order to improve the authenticity of the on-site dynamic situation in the environment in which the subject is located, referring to FIG. 2, the environment capture device 1 may further include a wind direction wind speed recording device in addition to the first camera device 11 and the second camera device 12. 13. The sound capturing device 14, the temperature and humidity capturing device 15, and the motion detecting device 16 respectively collect sounds, wind direction or temperature and humidity, and movement (vibration) acceleration information, etc., and background image A, on-site ambient light source Image B constitutes a more realistic live dynamic situation. The wind direction wind speed recording device 13 can be implemented by using at least one wind direction anemometer to record changes in time and wind direction wind speed in the environment in which the object is located; the sound capturing device 14 can be implemented by using at least one field recorder. The change of sound and time in the environment of the object; the temperature and humidity picking device 15 can be implemented by using at least one temperature and humidity meter; for the non-limiting embodiment, the motion detecting device 16 can use a three-axis acceleration sensor. Implement to record changes in vibration or movement in the environment in which the subject is located.

Thus, the background image of the scene dynamics in the environment in which the subject is located, the image of the foreground change, the change of time and wind direction, the change of sound and time, the change of temperature and humidity and time, the vibration or movement change, etc. Can be recorded to form a complete on-site dynamic situation, which can be reconstructed in the future based on the recorded dynamic situation of the scene, which can be reconstructed The dynamics of the scene are more authentic.

Step S12: Please refer to FIG. 4, which is a schematic diagram of the present invention for reconstructing a dynamic situation on the scene to form a dynamic reconstruction virtual environment. The environment reconstruction device 6 is used to reconstruct the dynamic situation of the scene to form a dynamic reconstruction virtual environment, and the environment is reconstructed. The device 6 includes at least one video playback device 61, a ring-shaped reflective device 4, at least one reconstructed image capturing device 3, and a composite screen 5; the reconstructed virtual reconstruction virtual environment includes a dynamic illumination image through which the dynamic illumination image is transmitted The playback device 61 forms the live environment light source image B on the ring-shaped reflection device 4; see FIG. 5, FIG. 5 is a schematic diagram of reconstructing a field ambient light source by using a dynamic illumination image in the present invention. The playback device 61 can be implemented by a screen projector, and the live environment light source image B is projected onto the annular reflection device 4 by the image playback device 61. The figure also shows the foreground environment of the annular reflection device 4 reflecting the light reconstruction field ( In the figure, the scene ambient light source image B is shown. For example, in Fig. 3, the light source of the scene foreground comes from the sun at the top right of the object at 30°. The field environment light source image B formed by the foreground is captured by the second filming device 12. In the fifth figure, the scene environment light source image B is projected by the image playback device 61 on the ring type reflection device 4, and the ring type reflection device 4 reflects The source of the sun at the 30° position on the upper right side of the reconstruction, whereby the on-site ambient light source can be successfully reconstructed.

The annular reflection device 4 can be a circular or concave mirror, which is a preferred effect. In the fourth figure, the center of the annular reflection device 4 can be disposed in front of the imaging center C (such as the face), and is set. The position center can be the +30°~+60° position above the center of the camera target C, and is directed toward the camera target C; wherein the angle is 0° at the center of the camera target, and is above the front It is a positive angle and a negative angle toward the front and the bottom.

Referring to FIG. 3, the light source of the foreground in FIG. 3 is from the sun at the top right of the object at 30°, and in FIG. 5, the live environment light source image B is projected by the image playback device 61 on the ring-shaped reflecting device. 4. The toroidal reflection device 4 reflects the light source of the reconstructed upper right 30° position of the sun; if the center of the position of the annular reflection device 4 is set to be above the shooting center (such as the face) of the image capturing target C At a position of +30° to +60°, the foreground light source reflected by the ring-shaped reflecting device 4 (the sun at the upper right side of the subject at 30°) can be appropriately irradiated on the face of the imaging target C, which can be more successful. Reconstruct the prospects of the field.

Please refer to FIG. 7. FIG. 7 is a schematic view of the ring-shaped reflecting device of the present invention. In the case of a better dynamic reconstruction virtual environment, the annular reflection device 4 can be formed by a plurality of mirror arrays 41 arranged in an annular concave shape, and the mirror array 41 is composed of a plurality of convex mirrors 411. Referring to FIG. 8 again, FIG. 8 is a schematic diagram of the present invention for generating a dynamic illumination image by using a ring-shaped reflection device to reconstruct a field ambient light source. Only the annular concave-shaped annular reflection device 4 is illustrated, and the image playback device 61 When the on-site ambient light source image B is projected on the annular reflection device 4 (projected by the image playback device 61 at a projection distance L1 perpendicular to the annular reflection device 4, projected on the annular reflection device 4), the annular reflection by the annular concave surface The device 4 can reflect the projected field environment light source image B more concentratedly to reflect the foreground light source (such as the sun light source) (the reflection reflection distance L2 perpendicular to the imaging target C by the ring type reflection device 4 is reflected in the imaging target) C)); for a better dynamic reconstruction virtual environment rendering effect, the projection distance L1 and the reflection distance L2 may be the same or similar distances.

The video playback device 61 can be implemented by using one or more video playback players or projectors, but is not limited thereto; when the second camera device 12 is a group, the second camera device 12 forms a scene. The image source device B is a group, and the video playback device 61 plays the scene environment light source image B generated by the second camera device 12 at the center of the ring type reflection device 4; when the second camera device 12 is two groups, the second When the scene environment light source image B formed by the filming device 12 is two groups, the two groups of video playback devices 61 can be used, and the scene generated by the second filming device 61 is played by mirroring the center of the ring type reflecting device 4 as a mirror image. The ambient light source image B, that is, the first group of second camera devices 12 forms a live ambient light source image B ₁ (not shown in the figure) on the left side of the foreground of the subject, and the second group of video playback devices 61 play The scene ambient light source image B ₁ (not shown in the figure) on the left side of the foreground of the subject, and the second group second photographing device 12 form the scene ambient light source on the right side of the center of the foreground of the subject image B _2, a first set of video playback Right center prospects opposing player 61 subject scene ambient light source image B _2; see FIG. 12, graph 12 of the present invention utilizing a plurality of sets of video playback apparatus schematic of the ambient light to reconstruct the scene; second The filming device 12 may be an m*n group, and the second filming devices 12 respectively form a scene environment light source image B _i,j , (i=1, . . . , m, j=1, at the center of the foreground of the object. ..., n) respectively, the second filming device 12 forms a scene energy source image B _i,j on the left side of the foreground of the subject, and a scene on the right side of the foreground of the foreground of the second filming device 12 on the right side of the object Ambient light source image B _i,j+1 . When reconstructing two foreground light sources in the foreground of the field, two sets of second filming devices 61 (labels Pjtr _i,j , right side Pjtr _i,j+1 and left side Ptjr _i,i ) respectively correspond to the scene ambient light source image B _i,j Playback, reflected on the ring-shaped reflecting device 4, reconstructs the foreground light source in which the foreground of the field appears.

For the non-limiting embodiment, if the second imaging device 12 can be 2 (m*n, m=1, n=2, m is the horizontal resolution column number, n is the direct resolution number of rows), these The second filming device 12 respectively forms a scene environment light source image B _i,j for the center of the foreground of the object _, and respectively forms the scene environment light source image B on the left side of the foreground of the foreground of the object by the second left filming device 12 _1,1 , the second filming device 12 on the right side forms the scene environment light source image B _1,2 on the right side of the foreground of the subject. When reconstructing two foreground light sources in the foreground of the field, two sets of second filming devices 61 (labels Pjtr _i,j , right side Pjtr _2,1 and left side Pjtr _1,1 ) respectively respectively to the left and right groups of the field environment light source images B _{i , j} (left side B _1,1 and right side B _1,2 ) plays, reflects on the ring-shaped reflecting device 4, reconstructs the foreground light source on the left and right sides of the foreground of the field.

For the non-limiting embodiment, when the second imaging device 12 can be 4 (m*n, m=2, n=2, m is the horizontal resolution column number, n is the direct resolution line number), these The second filming device 12 respectively forms a scene environment light source image B _i,j for the center of the four spots of the foreground of the subject, which are the (1, 1) group second filming device 12 pairs, respectively. The foreground (1, 1) group of the foreground (1, 1) group of the scenes, the ambient light source image B _1,1 , the (1, 2) group of the second camera 12, the foreground (1, 2) group of the subject the analysis point B of the second image scene filmed ambient light source _1, (2,1) to the first group 12 of the foreground subject in the (2,1) points of the set of resolution source image scene environment B _2,1, The second (2, 2) group second imaging device 12 analyzes the scene ambient light source image B _{2, 2} of the (2, 2) group of the foreground of the subject. In contrast, four sets of second filming devices 61 (labels Pjtr _i,j ) are respectively played on the four sets of live ambient light source images B _i,j and reflected on the ring-shaped reflecting device 4 to reconstruct four quadrants of the foreground of the field. The foreground light source.

In the specific implementation, the synthetic screen 5 can be a blue screen or a green screen. When the target is shot in front of the blue screen or the green screen, the film after the shooting is easy to remove the blue screen or the green screen (called color back, chroma Key), which is conducive to the synthesis of images.

Thereby, for example, the dynamic illumination played by the video playback device 61 can be reflected by the ring type reflection device 4, and irradiated on the center (such as the face) of the imaging target C to reproduce the light source, strength, change, etc. of the foreground of the field. For example, at sunset, the sun's rays come from the upper angle of the face of the camera's target at an angle of about 15 degrees. Unlike the midday sun, the sun's rays come from the upper horizontal line of the camera's target at an angle of about 85 degrees. In the target face of the camera The direction of strength and weakness is different, which will make the dynamic reconstruction of the reconstruction more authentic.

For another example, if the camera C is in the fireworks scene or in the front of the driving lights, the flickering of the fireworks and the movement of the lights cause the light and shadow changes of the face of the camera target, which will make the reconstructed dynamic reconstruction virtual reality more authentic. .

Further, if the on-site environment capture device 1 is in addition to the camera, the sound collection device recording device 14 with the sound collection, the wind direction wind speed recording device 13 collected by the wind direction, the motion detection device 16, and the temperature and humidity collection of the temperature and humidity collection The device 15 may further include a sounding device 63 (specifically, a sound emitting device and a sound box may be used), a blowing device 62 (specifically, a fan or a fan may be used), and an air conditioning device 64 (specifically, a temperature and humidity controlled air conditioner or The snow platform can be used, and the mobile platform device 65 (which can be configured by a platform for three-dimensional movement) can reconstruct the sound of the appearing field, wind direction or temperature, humidity, vibration or movement.

Therefore, the dynamic reconstruction virtual environment may include the sound of the scene, the wind direction wind speed or the temperature and humidity, etc., wherein the dynamic illumination image is formed by playing the live environment light source image B on the ring type reflection device 4, The reconstructed sound, wind direction wind speed or temperature and humidity are respectively formed by the sounding device 63, the air blowing device 62, the air conditioning device 64, and the mobile platform device 65, which will dynamically reconstruct the virtual environment at the camera target body, and dynamically reproduce the sound and sound. Wind speed reappears or temperature and humidity (or snow) reappear, vibrate or move to reproduce, closer to the actual situation.

Step S13: Referring again to FIG. 4, the imaging target C is set in the dynamic reconstruction virtual environment, and the dynamic illumination image is irradiated onto the imaging target C, and at the same time, the reconstructed image capturing device 3 is used to capture the imaging target located in front of the synthetic screen 5. C is used to generate an initial video; wherein the reconstructed image capturing device 3 can be implemented as one or more sets of cameras, and can record images and sounds of the moving target C in front of the synthetic screen 5 in the dynamic reconstruction virtual environment; Reconstructing the virtual environment to reconstruct the foreground light source of the field with dynamic illumination (such as the sun's light source, pyrotechnic flicker, changing headlights, or even multiple scenes of ambient light source image B), reconstructing the sound of the appearing field, and reconstructing the wind direction of the field Reconstructing the temperature and humidity of the field, rebuilding the vibration or movement of the field, making the initial video more realistic and greatly improving the rigidity and distortion of the conventional technology.

The image capturing target C that is photographed before the synthetic screen 5 may include a person, an animal, an article, or a combination of the two or more, so that the camera object C can interact with the person, the animal, and the object to reconstruct the image. The filming device 3 produces an initial recording.

Step S14: Figure 6 is a schematic view of the composite image of the present invention. The background image A taken by the first filming device 11 is synthesized onto the initial video, and the composite video D is formed by shooting; the synthetic video D system is used to capture the image. The C image reconstruction was made in the dynamic reconstruction virtual environment. In the figure, the face light of the imaging target C comes from dynamic illumination (the live environment light source image B is projected by the video playback device 61 and reflected on the face of the imaging target C reflected by the annular reflection device 4), and the sound comes from reconstruction. The sound of the field, and the wind speed reappears, the hair and clothes of the camera C can be dynamically moved according to the shooting time, and then the temperature and humidity can be reproduced, so that the camera C can dynamically feel according to the shooting time. Alternating between hot and cold, the corresponding expression movements are presented, and then the displacement of the imaging target C can be dynamically vibrated or moved according to the time of shooting due to vibration or movement reproduction; therefore, the synthetic video D formed by the shooting is more realistic and natural, and is available. For example, it can be a weather anchor, a newcomer to shoot a wedding, a festival, a tourist film, and the like.

Please refer to FIG. 14 , which is a second flow chart of a synthetic video recording method for on-site dynamic situation reconstruction of the present invention. In many application embodiments, a movie of a virtual character in a live environment is often taken first, and then In the studio, the image of the camera target is replaced by the image of the virtual character, and the video D is synthesized. This kind of practice is technically familiar, and the difficulties often encountered are obviously insufficient in realism, and it is difficult to interact with the characters, animals, trees and flowers (field objects) on the scene, or the interaction is not realistic and natural, and the application of the present invention is The technology can overcome the shortcomings of the prior art, and the process steps are as follows: S21: Firstly, similar to the foregoing step S11, at least one first filming device 11 and at least one second filming device 12 are set up in the field environment, the first filming is performed. The device 11 and the second camera device 12 constitute a site environment capture device 1; in step S11, the foreground and background of the scene are captured, and in this step, a virtual character is added, and even the virtual character and the scene of the characters, animals, trees and flowers ( The on-site environment capture device 1 is configured to capture the live dynamic situation in the environment in which the virtual character interacts with the on-site object, for example, using the first camera device 11 to capture images of the virtual character interacting with the on-site object and The background forms the background image A, and the second filming device 12 is used to capture the foreground of the virtual character interacting with the on-site object to form the scene environment light source image B. The background of the virtual character and the on-site object may include a building, a natural environment, a character, an animal, an item, or a combination of the two or more. When the virtual character interacts with the on-site object, for example, the virtual character can talk to the on-site object. Greeting, shaking branches, stroking Interactive interactions make objects more interesting and interesting.

Similarly, the first filming device 11 can be multi-mirror filming (or using a plurality of sets of first filming devices 11), and the plurality of first filming devices 11 are used to record images and backgrounds of virtual characters interacting with the live objects to form a multi-mirror. The background image A formed by the filming.

Similarly, the second camera 12 can be an m*n group, as in the foregoing step S11, but only the subject is replaced with a virtual character to interact with the live object, that is, the foreground of the second camera 12 interacting with the virtual object and the live object. The center (the center of the left and right, the center of the four quadrants, etc.) forms a live ambient light source image B.

Further, the on-site environment capture device 1 can be equipped with a sound capture device 14 (such as a recording device), a wind direction wind speed recording device 13, a motion detecting device 16, and a temperature and humidity capturing device 15 to collect the sound of the scene. Wind speed or temperature, humidity, vibration or movement.

S22: reconstructing the dynamic situation of the scene by using an environment reconstruction device 6 to form a dynamic reconstruction virtual environment, wherein the dynamic reconstruction virtual environment reconstructs the field ambient light source by using the dynamic illumination image, and the dynamic illumination image is the scene through the image playback device 61. The ambient light source image is played by the ring-shaped reflecting device 4; further, the sound-emitting device 63 (specifically, the sound-emitting device and the sound box can be used), the air blowing device 62 (specifically, a fan or a fan can be used), and the air-conditioning device 64 (specifically usable temperature) The air-conditioning device or the snow-making device of the humidity control device and the mobile platform device 65 (specifically, a platform for three-dimensional movement of a carrying platform) can respectively reconstruct the sound of the appearing field, the wind direction or the temperature and humidity, the vibration or the movement.

The video playback device 61 can use one or more video playback players or projectors, etc., and is not limited to; the reconstructed image capturing device 3 can use one or more image capturing devices, lighting auxiliary devices, or Sound equipment, etc.

The ring-shaped reflecting device 4 can be formed by a plurality of mirror arrays 41 arranged in an annular concave shape, and the mirror array 41 is composed of a plurality of convex mirrors 411 for the cooperation of the image playing device 61 and the second filming device 12. , as described in the previous step S12, the description will not be repeated here.

S23: The imaging target C is set in the dynamic reconstruction virtual environment, and the dynamic illumination image is irradiated on the imaging target C, and the reconstructed image capturing device 3 simultaneously captures the imaging target C in front of the synthetic screen 5 to simulate the virtual character. Interactive actions to generate an initial recording; S24: The background image is removed from the virtual character image and synthesized into the initial video to form a composite video D. Thus, the composite video D can reconstruct the camera target C image in the dynamic reconstruction virtual environment, with simulated virtual A composite video of the interaction between the character and the scene.

In the above, the first camera 11 and the second camera 12 can be at least one of a wide-angle camera. When shooting in an outdoor scene, the background, the virtual character, the live object, and the ambient light source can be captured through a plurality of different angles. The background may be a building, a natural environment, a character, an animal, an article, or a combination of any two or more, and the on-site object includes a building piece, a natural environment object, a character, an animal, an artificial object, or a combination of the two or more. When the virtual reality photography is performed in the shed, the ring-shaped display device 4 installed at a high hanging angle is used to play the image of the live environment light source captured by the second camera 12, so that when the initial recording is taken, the recording can be performed. The scene environment light source image is used to obtain a more realistic light and shadow change effect, and then after removing the composite screen 5 and the virtual character image, the pre-shooted background image A is combined with the initial video, and the virtual target is replaced by the camera target C. This produces a more realistic and natural dynamic composite recording. The imaging target C may include a person or an animal.

The difference between the second process and the first process is that the second process, when pre-shooting the scene outdoors, will use one or more wide-angle cameras to record a virtual character to interact with the live object in front of the background, such as a person holding A dog is used, and at the same time, another or a wide-angle camera is used to capture the light and shadow changes of the virtual character and the on-the-spot object to obtain the scene environment light source image. Then, if someone wants to capture an image in the shed that feels the same as the scene of the avatar shooting outdoors, the camera object C only needs to perform the same action as the avatar in front of the composite board 5, and uses the ring type. The reflection device 4 projects the image of the scene environment light source, and then the camera performs the shooting, so that the image can be back-synthesized to obtain a realistic and natural synthetic video D picture.

Furthermore, when the wide-angle camera is used to capture the image of the on-site ambient light source, the wide-angle camera can be used to record the virtual character interacting with the on-site object or one of the sound sources at the time, and the image can be reconstructed via the environment through the camera. 6 Simultaneously playing the scene environment light source image and the sound source, so that the sound source is recorded in the initial recording through the camera, so that the synthesized source can be simultaneously outputted after the post-compositing composite recording is output. For example, when a avatar interacts with a dog (on-site object), the wide-angle camera records the dog’s call at the time, and During the virtual live photography in the shed, the sound is played simultaneously while playing the live environment light source image, so that the camera target can capture the motion of the virtual character and go back to the back, and can obtain the synthetic video like the dynamic of the scene at that time. D, and the difference is only in the replacement of the protagonist.

In summary, the composite video recording method of the live dynamic situation reconstruction of the present invention, when shooting a scene in advance, in addition to shooting a background, a virtual character or a live object, simultaneously captures the ambient light source, sound or both at the time. When the virtual reality shooting is performed in the shed, the captured ambient light source and sound can be output to reproduce the light and shadow changes and sound effects of the scene shooting, so that the synthetic video after the key board is removed can be more realistic. In order to achieve the same effect as shooting outdoors or recreating the virtual character shooting at that time.

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

S11~S14‧‧‧Steps

Claims (13)

A synthetic video recording method for dynamic scenario reconstruction includes the following steps: utilizing a live environment capture device to capture a scene dynamic situation in an environment in which a subject is located; wherein the live dynamic context includes at least one background image And at least one scene environment light source device, the field environment capture device includes at least one first camera device and at least one second camera device, wherein the background image is generated by the first camera device for capturing a background of the object The on-site ambient light source image is generated by using the second filming device to capture the foreground environment of the object; and the scene dynamic situation is reconstructed by an environment reconstruction device to form a dynamic reconstruction virtual environment; wherein the dynamic reconstruction virtual environment Included in the at least one dynamic illumination image, the environment reconstruction device includes at least one image playback device, a ring-shaped reflection device, at least one reconstructed image capture device, and a composite screen, and the dynamic illumination image is used to image the live ambient light source through the image playback device Formed by the ring-shaped reflecting device; set a camera target to the move In the reconstructed virtual environment, the dynamic illumination image is irradiated onto the imaging target, and the reconstructed image capturing device is used to capture the image capturing target located in front of the synthetic screen to generate an initial recording; and the initial recording is removed from the background. The screen is synthesized and the video of the camera object is retained, and is synthesized on the background image to form a composite video. The composite video is formed by reconstructing the video of the camera target in the dynamic reconstruction virtual environment. The synthetic video recording method of the on-site dynamic situation reconstruction described in claim 1, wherein the live dynamic situation further comprises a live sound, the live environment capture device further comprising a sound capturing device, the live sound The sound capturing device is generated by extracting a sound source of the environment in which the object is located; the dynamic reconstruction virtual environment further includes a dynamic sound, and the environment reconstruction device further comprises a sounding device, wherein the dynamic sound is reconstructed by the sounding device The live sound is generated; the reconstructed image capture device further records the dynamic sound to form a portion of the initial video. The synthetic video recording method of the on-site dynamic situation reconstruction described in claim 1, wherein the on-site dynamic situation further comprises an on-site air flow, the on-site environmental capture device further comprising a wind direction wind speed recording device, the scene Air flow is recorded by the wind direction The device reproduces the air flow in the environment in which the object is located; the dynamic reconstruction virtual environment further includes a dynamic air flow, and the environment reconstruction device further includes a air supply device, wherein the dynamic air flow system reconstructs the site air from the air supply device The flow is generated. The synthetic video recording method of the on-site dynamic situation reconstruction described in claim 1, wherein the on-site dynamic situation further includes an on-site temperature and humidity indicator, and the on-site environment capture device further comprises a temperature and humidity capture device. The on-site temperature and humidity index is generated by the temperature and humidity extraction device taking one or a combination of temperature or humidity of the environment in which the object is located; the dynamic reconstruction virtual environment further includes a dynamic temperature and humidity indicator, and the environment reconstruction device further The air conditioning device is included, and the dynamic temperature and humidity index is generated by the air conditioning device reconstructing the on-site temperature and humidity index. A synthetic video recording method for on-site dynamic situation reconstruction, comprising the steps of: utilizing a live environment capture device to capture a virtual character and interacting with a live object; a live dynamic situation; wherein the live dynamic context includes at least one background image And at least one live environment light source image, the field environment capture device includes at least one first camera device and at least one second camera device, wherein the background image is used by the first camera device to capture the virtual character and the live object The on-site ambient light source image is generated by the interaction, and the second filming device is used to capture the foreground environment in which the virtual character interacts with the on-site object; and the on-site dynamic situation is reconstructed by an environment reconstruction device to form a dynamic reconstruction virtual environment. The dynamic reconstruction virtual environment includes at least one dynamic illumination image, and the environment reconstruction device includes at least one image playback device, a ring-shaped reflection device, at least one reconstructed image capture device, and a composite screen, and the dynamic illumination image is transmitted through the image The playback device images the ambient light source in the ring type And forming a camera target in the dynamic reconstruction virtual environment, the dynamic illumination image is irradiated on the image capturing target, and simultaneously capturing the image capturing target in front of the synthetic screen by using the reconstructed image capturing device Simulating the virtual character interaction to generate an initial recording; and removing the initial recording from the background composition and retaining the recording of the camera target, synthesizing on the background image, and forming a composite video; the composite video will The video reconstruction of the camera target is made in the dynamic reconstruction virtual environment. A synthetic video recording method for on-site dynamic situation reconstruction as described in item 5 of the patent application scope, The live dynamic scenario further includes a live sound, the live environment capture device further comprising a sound capture device, wherein the sound capture device captures a sound source generated by the virtual character interacting with the live object The dynamic reconstruction virtual environment further includes a dynamic sound, the environment reconstruction device further comprising a sounding device, wherein the dynamic sound is generated by the sound reproducing device reconstructing the live sound; the reconstructed image capturing device further recording the dynamic sound to form the initial sound Part of the video. The synthetic video recording method of the on-site dynamic situation reconstruction described in claim 5, wherein the on-site dynamic situation further comprises an on-site air flow, the on-site environmental capture device further comprising a wind direction wind speed recording device, the scene The air flow is generated by the wind direction recording device capturing the air flow of the environment in which the virtual character interacts with the on-site object; the dynamic reconstruction virtual environment further includes a dynamic air flow, and the environment reconstruction device further includes a air supply device, The dynamic air flow is generated by the air supply device reconstructing the on-site air flow. The synthetic video recording method of the on-site dynamic situation reconstruction described in claim 5, wherein the on-site dynamic situation further comprises an on-site temperature and humidity indicator, the on-site environment capture device further comprising a temperature and humidity capture device, The on-site temperature and humidity indicator is generated by the temperature and humidity extraction device taking one or a combination of temperature or humidity of the environment in which the virtual character interacts with the on-site object; the dynamic reconstruction virtual environment further includes a dynamic temperature and humidity indicator. The environment reconstruction device further includes an air conditioning device, and the dynamic temperature and humidity indicator is generated by the air conditioning device reconstructing the on-site temperature and humidity index. The synthetic video recording method of the on-site dynamic situation reconstruction according to the first or sixth aspect of the patent application, wherein the live dynamic situation further comprises a physical movement information, the on-site environment capture device further comprising a motion detection device The physical movement information is generated by the motion detection device capturing the vibration or movement of the environment in which the object is located; the dynamic reconstruction virtual environment further includes a dynamic movement, and the environment reconstruction device further includes a mobile platform device, the dynamic The mobile system receives the physical movement information from the mobile platform device and reconstructs the movement of the live entity. The composite video recording method of the on-site dynamic situation reconstruction described in claim 1 or 6, wherein the second camera device is an m*n group, and correspondingly, the video playback device is The m*n group; the image playback device plays the scene environment light source image generated by the second filming device with the center of the ring type reflection device as a mirror image symmetric shape; wherein m and n are positive integers, which can form m* n resolution of dynamic illumination points. For example, the synthetic video recording method of the on-site dynamic situation reconstruction described in the first or sixth aspect of the patent application, wherein the synthetic screen is a green screen or a blue screen. The composite video recording method for on-site dynamic situation reconstruction according to the first or sixth aspect of the patent application, wherein the center of the annular reflection device is disposed at an angle of +30° to + before the imaging target shooting center. 60°; wherein the angle is 0° at the center of the image capturing target, a positive angle toward the front side, and a negative angle toward the front side. The synthetic video recording method of the on-site dynamic situation reconstruction according to the first or sixth aspect of the patent application, wherein the annular reflection device is formed by a plurality of mirror arrays arranged in an annular concave shape; wherein The mirror array is composed of a plurality of convex mirrors.