JP6244091B2 - Planetarium control device - Google Patents

Description

  The present invention relates to a planetarium projection apparatus having both two types of planetarium projection apparatuses, an optical planetarium and a digital planetarium.

  The planetarium projection device has a planetary projection device that projects planets separately from the fixed stars, as well as skyline projection devices and constellation pictures, coordinate lines, nebulae, star clusters, pointers, etc. that project landscapes such as the ground as the production technique evolves In recent years, it has also been equipped with projectors for projecting natural phenomena that occur in the sky such as lightning and aurora, and artificial objects such as spacecraft. The equipment used there is not limited to conventional optical equipment using films and original plates, but electronic equipment such as video projectors are also used, and video projectors are also recorded in advance on videotapes and optical disks. In addition to the recorded images, it uses images generated by computer graphics in real time as needed. In addition to the conventional planetarium optical system using a stellar sphere and an optical planetary projection system (hereinafter referred to as the “optical planetarium”), computer graphics can be used with a video projector. A digital type projecting (hereinafter referred to as “digital planetarium”) has also appeared. Optical planetariums and digital planetariums have advantages and disadvantages, respectively. To complement these, a combined projection system that simultaneously drives the optical planetarium and digital planetarium projectors in one planetarium facility is also adopted. ing.

  The conventional composite projection method uses an optical planetarium and a digital planetarium according to the projection target, and reproduces one starry sky by a set of projection images projected from each planetarium. Here, both planetariums are driven according to one production program, and the observation time, position, and attitude of each other are matched in real time, and the projected starry sky is matched.

  As a result, the natural switching from the starry sky by the optical planetarium to the starry sky of the digital planetarium was realized. In addition, when explaining the starry sky, it points to a bright and shining star (planet) in the starry sky projected on an optical planetarium, and it is a planet by switching that star to a projected image of an enlarged planet on the digital planetarium. Effective use has also been made in educational aspects, such as explicitly expressing.

  In the above-described conventional composite projection system, various control methods have been devised, with the primary focus being on matching the position of the image of the optical planetarium and the position of the image of the digital planetarium. For example, the position information of the rotation axis of the optical planetarium is sent to the digital planetarium control device in real time, and the digital planetarium control device generates an image based on the value, or one of the control devices or an independent command The given control device has sent observation time, position, and orientation, which are parameters necessary to reproduce the starry sky, to each control device, and has been made to generate images that match each other.

  The system configuration of a conventional planetarium control apparatus having both an optical planetarium and a digital planetarium is shown in FIGS. In the system shown in FIG. 9, the data of the observation time, position, and attitude controls the digital planetarium by the connecting line 51 indicated by a thick line from the integrated control computer 50 that controls the entire planetarium. The data is sent to the master computer 52 and the optical planetarium master computer 53 that controls the optical planetarium.

  In the system shown in FIG. 10, the position of each axis of the optical planetarium from the optical planetarium master computer 53 to the digital planetarium master computer 52 or by the connection line 55 is indicated by a connection line 54 indicated by a bold line in the figure. A value to be taken by each axis of the optical planetarium is sent from the digital planetarium master computer 52 to the optical planetarium master computer 53.

  In the above, what kind of data is specifically sent varies depending on the control device, but basically, data for controlling the projection elements of the control device is sent to the target control device. It was limited to position information and device ON / OFF.

  As is clear from the above description, in the composite projection system of the prior art, the purpose is to match the positions of the projected image projected by the optical planetarium and the projected image projected by the digital planetarium, The command for the projection element of the optical planetarium controller and the command for the projection element of the digital planetarium controller were executed independently and did not affect each other. That is, for example, a command to reflect the sun of an optical planetarium affects only the sun of the optical planetarium and does not affect the image of the digital planetarium, and conversely, the command to the planet of the digital planetarium also It only affected the planet and did not affect the image of the optical planetarium. Specifically, taking the system shown in FIG. 9 as an example, the integrated control computer 50 sends a command to light the optical planetarium sun to the optical planetarium master computer 52. Similarly, a command to illuminate the digital planetarium planet is sent from the integrated control computer to the digital planetarium master computer 53. Therefore, the optical planetarium control device and the digital planetarium control device cannot know what projection elements are projected on the other planetarium. Even in the system having the configuration of FIG. 10, the command to turn on the sun of the optical planetarium emitted from the digital planetarium master computer 52 is simply sent to the optical planetarium controller as a command for the external device. The digital planetarium control device is information that does not contribute to the image generation, and is not associated with the digital planetarium projection element.

  In other words, in the conventional composite projection system, the positional relationship between the projection image of the optical planetarium and the projection image of the digital planetarium is the same, and the fact that the projection images of each other overlap and is not considered. Inappropriate video expression such as the bright planet of the optical planetarium projected on the slide image projected on the digital planetarium, or the enlarged planetary image of the digital planetarium superimposed on the moon image projected on the optical planetarium In some cases, realistic images cannot be provided in various production scenes.

  Under such circumstances, recently, an attempt to use both images in combination has been made. For example, an image of a digital planetarium such as “Planetarium Device” of Patent Document 1 or “Composite Planetarium System” of Patent Document 2 is used. Depending on the situation, there are methods for shielding the image of the optical planetarium, methods for projecting bright stars using the optical planetarium, and reproducing the starry sky by combining the dark stars of the digital planetarium.

  The former invention extracts a portion of the projected image projected from the optical planetarium that overlaps with the projected image projected from the digital planetarium, and shields that portion of the projected image projected from the optical planetarium. is there. In the latter invention, an optical planetarium projects an arbitrary star within the range from the brightest bright star to a predetermined brightness on the high brightness area side, and a certain amount of light below the predetermined brightness on the high brightness area side. The digital planetarium projects the arbitrary star of the above to complete the starry sky. For this purpose, the optical planetarium is provided with a light shielding mechanism and an arbitrary star ON / OFF mechanism.

JP 2006-145614 A 2012-194579

  The known invention described above is to provide a light shielding function for the starry sky of an optical planetarium that meets a specific purpose by preparing some mechanism in the optical planetarium. Therefore, in the known invention described in Patent Document 1, it is necessary to determine whether or not to turn on the projection target of the optical planetarium in the integrated control computer which is a higher-level control device. What kind of commands should be given to the optical planetarium controller when adding new projection elements to a digital planetarium that should be free to delete and combining images, or when trying to control the projection of an optical planet Whether to publish must be defined in the integrated control computer, resulting in a problem that requires the development of new control software for the integrated control computer.

  Further, in the known invention described in Patent Document 2, the configuration shown in the “form for carrying out the invention” about the combination of images is not connected between the optical planetarium and the digital planetarium, and both are independent. It is an example to be controlled. Therefore, since the optical planetarium control device cannot know the image drawn by the digital planetarium control device in real time, a dedicated image for evaluation to turn on / off the image of the optical planetarium in advance is stored in the optical planetarium control device. It is considered that the bright star to be projected is turned on / off. Therefore, in this case, there arises a problem that a dedicated video for evaluation and preliminary preparation work are necessary.

  In order to produce an image in the planetarium, it is not enough to be able to project a realistic image, and it is necessary to be able to easily and freely combine various images as various image effects, that is, image expressions. Is natural. However, as described above, in the projection apparatus that has been constructed or proposed so far, a new realization method is required each time a new video production is realized in performing the video production combining the respective videos. It was necessary to prepare or control data for combining the videos had to be created independently, making it difficult to produce the combination of both videos.

  Furthermore, it is limited to unilateral video composition that combines the image of an optical planetarium with the image of a digital planetarium, and the image elements that can be combined with an optical planetarium are limited to stars only. There were significant constraints on the synthesis.

  The present invention was created in view of the above-described problems of the prior art, and in a projection apparatus having both an optical planetarium and a digital planetarium, automatic projection in which a series of sequences is assembled in advance or projection by manual operation is performed. Even so, there is no need for special preparation. A planetarium projection device with a high visual effect that can produce various video composition effects for images of optical planetarium and digital planetarium. The purpose is to provide.

  In other words, the planetarium control device of the present invention is a planetarium projection device that has both an optical planetarium and a digital planetarium projection device. By sharing the projection data of one planetarium control device with the other planetarium projection device, It is possible to synthesize one planetarium image with the other planetarium image.

  In order to achieve the above-mentioned object, the remaining one control device must know what image each of the control devices of the optical planetarium and the digital planetarium is projecting. In the present invention, this is realized by sharing one projection data via a network or the like. Specifically, by sharing the projection data of the digital planetarium control device with the optical planetarium projection device, a method for enabling the image of the optical planetarium to be combined with the image of the digital planetarium (the invention according to claim 2), A scheme (invention according to claim 3) is assumed in which the projection data of the optical planetarium control device is shared with the digital planetarium projection device so that the digital planetarium image can be synthesized with the optical planetarium image.

  By the way, an optical planetarium that obtains a projected image by light transmitted through a projection original plate and a digital planetarium that obtains a projected image by an electronic image generated by a computer are originally different in projection method. Therefore, in the present invention, sharing of projection data is realized by adopting a method of incorporating an image object of an optical planetarium as a computer graphics model. By doing so, it is not necessary to sequentially transmit position information and device ON / OFF data as in the prior art.

  That is, in the invention described in claim 4, the image generating function of the digital planetarium control device is incorporated into the optical planetarium control device, so that the projection data of the digital planetarium control device is shared with the optical planetarium system.

  If this is explained in the planetarium apparatus having the configuration of FIG. 7, the digital planetarium master computer 11 can be realized by sending a command relating to the projection target of the digital planetarium as projection data to the optical planetarium control apparatus 20 or by the master. This is realized by calculating an instruction with a computer or by sending the calculated projection data calculated by the image generators 12A and 12B to the optical planetarium control device. In the former method, it is necessary to prepare a function in the optical planetarium control device 20 that can obtain the same calculation result as that calculated by the digital planetarium control device.

  In the invention described in claim 5, the image generation function of the optical planetarium projection device is modeled and incorporated into the digital planetarium control device, so that the image generation function of the digital planetarium control device is incorporated into the optical planetarium control device. Thus, the projection data of the digital planetarium control device is shared with the optical planetarium system.

  If this is explained in the planetarium apparatus having the configuration of FIG. 6, the integrated control computer M can be realized by sending a command for the optical planetarium to the digital planetarium control apparatus 10 as projection data, or the command can be calculated by the integrated control computer. Or the result calculated by the optical planetarium control device 20 is returned to the integrated control computer M and sent to the digital planetarium control device 20 as projection data. Of course, necessary projection data may be exchanged by directly connecting the optical planetarium control device and the digital planetarium control device. In the former method, it is necessary to provide a function in the digital planetarium control device that can obtain the same calculation result as that calculated by the optical planetarium control device.

  Further, when the method of integrating the two control devices enables symmetric control, a configuration that can be shared with each other is possible. That is, in the invention described in claim 6, by sharing the projection data of the digital planetarium control device with the optical planetarium projection device, the image of the optical planetarium can be synthesized with the image of the digital planetarium, and the optical planetarium By sharing the projection data of the control device with the digital planetarium projection device, the image of the digital planetarium can be combined with the image of the optical planetarium.

  In this case, the invention described in claim 7 is a means for sharing the projection data of the digital planetarium control device with the optical planetarium system by incorporating the video generation function of the digital planetarium control device into the optical planetarium control device. In the invention described in Item 8, the image generation function of the optical planetarium projection device is modeled and incorporated into the digital planetarium control device, thereby sharing the projection data of the optical planetarium with the digital planetarium control device.

  A configuration example of the above-described apparatus capable of sharing projection data with each other will be described in the planetarium apparatus having the configuration of FIG. Here, for the digital planetarium control device 10, models 11A and 11B for optical planetarium computer graphics are added to the image generators 12A and 12B, respectively. Of course, it is also possible to implement not only a computer graphics model but also an operation program capable of obtaining detailed projection data in the master computer 11 and the image generators 12A and 12B. For the optical planetarium control device 20, the rigorous projection data can be obtained by incorporating the digital planetarium software 24. However, simple dedicated graphics software and detailed projection data can be obtained by numerical calculation. The obtained arithmetic program can also be realized by being incorporated in a master computer or each control computer.

  Next, the projection data to be shared will be described. In order for the two devices to know each other's projection target and its state, at least the following data is required.

  In the case of optical planetariums, the projection positions are mostly determined uniquely by the observation time and the position / posture of the observer. Therefore, information to be shared as projection data is their ON / OFF information, and generally includes a control command for the target control device. For some functions, the current projector attitude and video size are also shared as projection data.

  Digital planetariums have far more capabilities than optical planetariums. However, these can basically be determined by the observation time and the position and orientation of the observer in many cases, so ON / OFF information is sufficient. The size and shape data are also shared as projection data. Of course, the image data itself generated as projection data shared from the digital planetarium may be used.

  Although the projection data to be shared shown above is calculated and transmitted by the corresponding control device, sharing of the projection data is realized. However, with this method, it is sometimes necessary to send a large amount of projection data. Conceivable. Therefore, projection data that can be projected by the control device is modeled as a model such as computer graphics and incorporated into the control device on the other side, so that projection data can be shared by exchanging less information.

  For example, if the starry sky projected by the optical planetarium is incorporated into a digital planetarium control device as a computer graphics model, the starry sky of the optical planetarium will be in addition to the observation date, position, and attitude that are always used in the digital planetarium. Only the information on the ON / OFF of the projection element of the optical planetarium is necessary, and dedicated calculation processing and a large amount of data transmission are unnecessary. It is not difficult to realize the starry sky projected by the optical planetarium as a computer graphics model. If the star is always placed on a spherical surface with a sufficiently large radius centered on the observation position. Good. For individual planets that can be regarded as a finite distance for an optical planetarium, and for celestial bodies in the solar system such as the moon and the sun, it is better to model them so that they are at an actual distance. By incorporating such a model into the digital planetarium control device, the image generated by the optical planetarium can be reproduced directly in the digital planetarium system.

  On the other hand, in order to reproduce an image generated by a digital planetarium within an optical planetarium control device, it is easiest to incorporate the functions of the digital planetarium system itself into the control device. Of course, the digital planetarium model may be used as it is, and may be realized by incorporating a calculation control program or the like that performs calculation as computer graphics but does not generate actual video.

  By sharing the projection data by the method as described above, information about the video generated by the other control device can be obtained. On the other hand, computation for video composition can be performed. That is, in the invention described in claim 9, video composition based on arithmetic operation and logical operation is enabled in the planetarium control device described above. Details of the video composition will be described in the section of the best mode for carrying out the invention.

  According to the planetarium control apparatus of the present invention having the above-described configuration, in the combined projection system of the optical planetarium and the digital planetarium, by sharing the projection data of one planetarium control apparatus with the other planetarium projection apparatus, one planetarium Can be combined with the image of the other planetarium, so that one planetarium control device can obtain information generated by the other planetarium control device. Therefore, there is no need for special preparation, whether it is automatic projection with a series of sequences or projection by manual operation, and the optical planetarium that can be synthesized is not limited to stars only, It is possible to provide a planetarium projection apparatus having a high image effect that can produce various image composition effects on an optical planetarium image and a digital planetarium image.

The figure of the projection image which compared the projection example by the planetarium control apparatus of a prior art, and the projection example by the planetarium control apparatus of this invention. 3 is a flowchart of projection by the planetarium control device of the present invention in the projection example of FIG. The figure of the projection image which compared the projection example by the planetarium control apparatus of a prior art, and the projection example by the planetarium control apparatus of this invention. The flowchart of the projection by the planetarium control apparatus of this invention in the projection example of FIG. The figure of the projection image | video which shows the example of a projection by the planetarium control apparatus of this invention. The block diagram of the planetarium control apparatus of this invention. The block diagram of the Example from which the planetarium control apparatus of this invention differs. The block diagram of the Example from which the planetarium control apparatus of this invention differs. The block diagram of the planetarium control apparatus of a prior art. The block diagram of the planetarium control apparatus of a prior art.

  Hereinafter, specific examples of the planetarium control device of the present invention will be described with reference to the accompanying drawings. FIG. 6 is a block diagram showing a configuration example of the planetarium control device of the present invention. Here, by installing the integrated control computer M, it is possible to link the two control devices of the digital planetarium control device 10 and the optical planetarium control device 20. The digital planetarium control apparatus 10 has digital planetarium image generators 12A... 12B that generate images of video projectors 13A... 13B, and a digital planetarium master computer 11 that gives commands to the digital planetarium image generators 12A. The optical planetarium control device 20 includes an optical planetarium main body control computer 22A for controlling the star projection device 23A, an optical planetarium planet control computer 22B for controlling the star projection device 23B, the optical planetarium main body control computer 22A, the optical type It has an optical planetarium master computer 21 that gives instructions to the planetarium planetary control computer 22B.

  The integrated control computer M is realized by sending a command for the optical planetarium as projection data to the digital planetarium control device 10, or the command is calculated by the integrated control computer M, or calculated by the optical planetarium control device 20. The result is returned to the integrated control computer M and sent to the digital planetarium control device 20 as projection data. Needless to say, the optical planetarium control device 20 and the digital planetarium control device 10 may be directly connected to exchange necessary projection data. In the former method, it is necessary to prepare a function in the digital planetarium control device 20 that can obtain the same calculation result as that calculated by the optical planetarium control device 10.

  FIG. 7 is a block diagram showing a different configuration example of the planetarium control device of the present invention. Here, it is realized that the digital planetarium master computer 11 interlocks the optical planetarium control device 20 as an extended device. The digital planetarium control apparatus 10 has digital planetarium image generators 12A... 12B that generate images of video projectors 13A... 13B, and a digital planetarium master computer 11 that gives commands to the digital planetarium image generators 12A. The optical planetarium control device 20 includes an optical planetarium main body control computer 22A for controlling the star projection device 23A, an optical planetarium planet control computer 22B for controlling the star projection device 23B, the optical planetarium main body control computer 22A, the optical type It has a digital planetarium master computer 21 that gives instructions to the planetarium planetary control computer 22B.

  The digital planetarium master computer 11 can be realized by sending a command relating to the projection target of the digital planetarium as projection data to the optical planetarium control device 20, or by calculating the command with the master computer, or the image generators 12A and 12B. This is realized by sending the calculated projection data calculated in step 1 to the optical planetarium control device. In the former method, it is necessary to prepare a function in the optical planetarium control device 20 that can obtain the same calculation result as that calculated by the digital planetarium control device. In this configuration example, as shown by a dotted line, a configuration in which the optical planetarium master computer 21 interlocks the digital planetarium control device 10 as an extended device is also possible. Normally, a one-way connection is effective in order to maintain control consistency.

  FIG. 8 is a block diagram showing a different configuration example of the planetarium control device of the present invention. Here, it is possible to combine projection images of optical planetarium and digital planetarium. The digital planetarium control apparatus 10 has digital planetarium image generators 12A... 12B that generate images of video projectors 13A... 13B, and a digital planetarium master computer 11 that gives commands to the digital planetarium image generators 12A. The optical planetarium control device 20 includes an optical planetarium main body control computer 22A for controlling the star projection device 23A, an optical planetarium planet control computer 22B for controlling the star projection device 23B, the optical planetarium main body control computer 22A, the optical type It has an optical planetarium master computer 21 that gives instructions to the planetarium planetary control computer 22B. Here, the digital planetarium control device 10 is provided with a computer graphics model 11A... 11B of an optical planetarium image element so that each of the control devices 10 and 20 can perform video evaluation of one of the different devices. In the image generator 12A... 12B, the optical planetarium control device 20 incorporates digital planetarium software 24 in the optical planetarium master computer 21 respectively, and control data for all projection elements from the digital planetarium master computer is It is also sent to other devices to realize complete sharing of projection data.

  Here, the video composition will be described. When the projection data is shared in only one direction, the video may be synthesized based on the three-dimensional information of the projection video model, but the result may not always be correct. Therefore, it is preferable to perform a brightness calculation according to the transparency information of the other video at the same projection position in the corresponding control device. Of course, the priority video may be defined in advance or may be set sequentially. If the transparency information is individually defined in advance for the three colors of red, blue, and green, it is natural to calculate the brightness for each color.

  When projection data is shared bi-directionally, processing may be performed in the same way as when sharing is unidirectional, but the video reproduces the correct depth using the three-dimensional depth direction information of the projection video model. Can be synthesized. The easiest way to do this is to use the same technique as computer graphics. If you use computer graphics representation, the texture used for the other model is a black image, and if necessary, the appropriate transparency data. By adding, it is possible to perform necessary processing in a series of computer graphics processing.

  In these video compositing processes, not only determination based on the context and priority of the projection target but also arithmetic operations and logical operations such as NOT, OR, AND, and ExOR are performed as a more advanced video compositing function. . As an example, the function of composition by arithmetic operation is listed below.

The brightness information of the image output from the optical planetarium control device is S, the transparency information is As, the brightness information of the image output from the digital planetarium control device is D, the transparency information is Ad, and the respective synthesis coefficients are Ks and Kd. Result L
L = S x Ks + D x Kd
As a synthesis coefficient K that acts on each arithmetic expression,
┌──┬──┬────┬──┬─────┐
│K = 0 │K = S │K = (1-S) │K = As│ K = (1-As) │
├──┼──┼────┼──┼─────┤
│K = 1 │K = D │K = (1-D) │K = Ad│ K = (1-Ad) │
Apply 演算 ──┴──┴────┴──┴─────┘ etc. However, each value shall be a value normalized to 0-1.
At this time, the image Ls projected by the optical planetarium and the image Ld projected by the digital planetarium are
Ls = S x Ks
Ld = D x Kd
Since the composition is performed on the projection surface, the addition operator in the expression is virtual.

Next, an example of a synthesis function by logical operation is given below. The arithmetic expression in the above arithmetic operation is expanded so that the luminance information of the video output from the optical planetarium control device is S, the transparency information is As, the luminance information of the video output from the digital planetarium control device is D, and the transparency information Is Ad, the respective synthesis coefficients are Ks, Kd, and the logical operators are Os1, Os2, Op1, Op2, Od1, Od2, and the synthesis result L is
L = {(S x Ks) x ((Os1 S) Op1 (Od1 D))}
+ {(D x Kd) x ((Os2 S) Op2 (Od2 D))}
As a logical operation operator O acting on each,
┌──┬───┬───┬─────┬─┬───┐
│ Negation │ Logical sum │ Logical product │ Exclusive logical sum │ False │ True │
├──┼───┼───┼─────┼─┼───┤
│NOT │OR │ AND │ ExOR │0 │ other than 0│
論理 ──┴───┴───┴─────┴─┴───┘ Perform logical operations such as ┘.
As in the case of arithmetic operations, the images Ls and Ld projected by each control device are
Ls = (S x Ks) x ((Os1 S) Op1 (Od1 D))
Ld = (D x Kd) x ((Os2 S) Op2 (Od2 D))
It is.

Here are some actual synthesis examples.
Simultaneous projection of optical planetarium and digital planetarium stars,
L = {(S x 1) x ((1 S) AND (1 D))}
+ {(D x 1) x ((1 S) AND (1 D))}
If you execute, only stars that project both the optical planetarium and the digital planetarium will be projected. That is, only all the overlapping stars are displayed.
Similarly,
L = {(S x 1) x ((1 S) XOR (1 D))}
+ {(D x 1) x ((1 S) XOR (1 D))}
Using, only different stars are projected.
Furthermore, since each logical operation operator can be different,
L = {(S x 1) x ((1 S) AND (1 D))}
+ {(D x 1) x ((1 S) XOR (1 D))}
If this formula is applied and the stars per Orion of the optical planetarium are erased, the stars per Orion as shown in Fig. 5 are replaced with the stars of the digital planetarium. Projection is possible.

  Next, an example of a projected image showing an example of projection by the planetarium control device of the present invention will be described. FIG. 1 is an example of a projected image obtained by combining a starry sky of an optical planetarium and a landscape image of a digital planetarium. (1) is according to the prior art, and (2) is according to the present invention. Until now, when the landscape image of a digital planetarium is irregular, the starry sky of the optical planetarium is reflected in a part of the landscape image, resulting in an unnatural image. In the projection image by the prior art of (1), for stars below the horizon, the stars of the optical planetarium are shielded by the shutter function, but the stars 2 are reflected in the silhouette 1 of the tree in the upper left, which is unnatural. It has become an image. In this case, the control device must be adjusted in advance so that no reflection occurs, and the user has to prepare in advance.

  According to the control device of the present invention, since the optical planetarium control device performs a composite operation of the image projected by the digital planetarium in the optical planetarium control device, there is no reflection without the need for prior adjustment or the like. Realistic video composition is possible. Furthermore, by setting an appropriate transparency for the image on the digital planetarium side, it is possible to control the portion of the optical planetarium that is close to the starry sky horizon to be dimmed or reddish. Further, since the state of the other projected video can be always grasped, even if an operation such as changing the landscape video at an arbitrary timing is performed, proper composition can always be performed and a realistic video can be continuously projected. In the projected image by the control device of the present invention of (2), a natural image is obtained because the optical planetarium control device generates a composite image with the digital planetarium image.

FIG. 2 is a flowchart showing a calculation procedure for realizing the above-described video composition.
In the control apparatus for the optical planetarium, after analyzing the shared data, it is determined whether or not the projection target of the optical planetarium is projected (S1 to S2).
If it is projected, the position of the projection target of the optical planetarium and the digital planetarium is calculated (S2 to S4).
Subsequently, a composition calculation for image composition is performed using the transparency information of the projection target position. The synthesis operation may be performed by performing arithmetic operation or logical operation on the brightness of the projection target of the optical planetarium based on the transparency of the projection target of the digital planetarium (S5 to S6).

  FIG. 3 shows an example in which the enlarged Saturn 4 projected by the digital planetarium is synthesized on the moon 3 projected by the optical planetarium. (1) is according to the prior art, and (2) is according to the present invention. . In the projection image according to the prior art (1), even if special processing is performed, only an unnatural composite image in which Saturn 4 is in front of the moon 3 can be generated.

  According to the control device of the present invention, by preparing an image of an optical planetarium as a three-dimensional model in the digital planetarium, it is easy to see how the Saturn 4 is hidden behind the moon 3 as shown in (2). Can be reproduced. Furthermore, if data is shared with each other, it is possible to correctly synthesize an image having the artificial celestial body 5 such as ISS before the image of the month 3.

FIG. 4 is a flowchart showing the flow of processing in the digital planetarium control apparatus for realizing the above-described video composition.
First, calculation date / time / position / posture are determined (S1).
Since the moon object of the optical planetarium is lit, the moon position is calculated (S2).
The position of the digital planetarium Saturn is also calculated (S3).
Next, an image is drawn using the obtained position information and a built-in three-dimensional model. As a result, the moon model of the optical planetarium and the Saturn model of the digital planetarium prepared in the digital planetarium control apparatus are drawn as three-dimensional computer graphics. Since the built-in moon model uses a black texture image, at this point, the digital planetarium Saturn is generated as an image hidden by the moon by computer graphics processing and controlled by an optical planetarium. The image is correctly combined with the image of the moon actually projected by the apparatus (S4).

  FIG. 5 is an exclusive composition of an optical planetarium star and a digital planetarium star, and produces the effect of replacing the starry sky near Orion in the starry sky projected by the optical planetarium with the digital planetarium starry sky. This is useful when it is necessary to highlight the starry sky in the relevant part.

  Using this synthesis method, it is also possible to realistically reproduce the last moment of Betelgeuse, which is said to explode and become a supernova soon in an astronomical sense. That is, if only the optical planetarium Betelgeuse is turned off, the digital planetarium Betelgeuse and the optical planetarium starry sky are combined. Use the functions of the digital planetarium control system to see the explosion of Betelgeuse fast forward.

  By performing synthesis based on such logical operations, various combinations of optical planetarium video and digital planetarium video are possible. For example, bright stars can be projected with a digital planetarium, and other stars can be projected with an optical planetarium, or vice versa. The Needless to say, not only stars but also all of the projection targets are compositing targets.

10 Digital planetarium control device 20 Optical planetarium control device

Claims (2)

In a planetarium projection device that has two types of planetarium projection devices, an optical planetarium and a digital planetarium,
By modeling the image generation function of the optical planetarium projection device and incorporating it into the digital planetarium control device, the projection data of the optical planetarium is shared with the digital planetarium control device, and the digital planetarium image is combined with the image of the optical planetarium. A planetarium control device characterized by being made possible . By incorporating the image generation function of the digital planetarium control device into the optical planetarium control device, the projection data of the digital planetarium control device can be shared with the optical planetarium system, and the image of the optical planetarium can be combined with the image of the digital planetarium The planetarium control device according to claim 1.