WO2024029154A1 - Système de planétarium - Google Patents

Système de planétarium Download PDF

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Publication number
WO2024029154A1
WO2024029154A1 PCT/JP2023/017866 JP2023017866W WO2024029154A1 WO 2024029154 A1 WO2024029154 A1 WO 2024029154A1 JP 2023017866 W JP2023017866 W JP 2023017866W WO 2024029154 A1 WO2024029154 A1 WO 2024029154A1
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WIPO (PCT)
Prior art keywords
video
brightness
fade
planetarium
image
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Application number
PCT/JP2023/017866
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English (en)
Japanese (ja)
Inventor
小織 瀬戸口
健一 駒場
伸啓 石牧
誠 土屋
理永 櫻井
Original Assignee
コニカミノルタプラネタリウム株式会社
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Application filed by コニカミノルタプラネタリウム株式会社 filed Critical コニカミノルタプラネタリウム株式会社
Publication of WO2024029154A1 publication Critical patent/WO2024029154A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
    • G09B27/00—Planetaria; Globes
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters

Definitions

  • the present disclosure relates to control of a planetarium system, and more specifically, to control of video production of a planetarium system.
  • LED domes in which an LED panel composed of a plurality of LED (Light Emitting Diode) elements is attached inside the dome, have begun to be used as domes for planetariums.
  • LED Light Emitting Diode
  • the video presentation may include fade-ins, fade-outs, and other expressions in which the brightness of the celestial object changes.
  • Patent Document 1 describes an LED panel in which a plurality of LED pixel units are arranged, each of the plurality of LED pixel units Discloses a planetarium "comprising a normal element including a red LED element, a green LED element, and a blue LED element, and a low-luminance element for outputting a lower luminance than the lowest luminance of the ordinary element" ([Summary] reference).
  • Patent Document 1 According to the technology disclosed in Patent Document 1, it is necessary to separately prepare a low-luminance element in order to realize various low-luminance video effects, which increases the hardware cost of the planetarium. Therefore, there is a need for a technique for realizing low-luminance video production using ordinary LED elements without using special hardware.
  • the present disclosure has been made in view of the above background, and in one aspect, the purpose is to realize low-luminance video production using ordinary LED elements without using special hardware. Our goal is to provide the following technology.
  • a planetarium system includes a plurality of light sources arranged inside the dome, a control unit that controls light emission of the plurality of light sources, and a storage unit that stores images to be displayed inside the dome.
  • the control unit analyzes the image to be displayed inside the dome read from the storage unit, and based on the fact that the image to be displayed inside the dome includes an image effect that requires a brightness lower than the minimum brightness of each light source, The video effect is corrected to use a brightness higher than the minimum brightness of the light source, and the image including the corrected image effect is projected inside the dome.
  • the video includes a first video presentation and a second video presentation.
  • the first video performance is a video performance that does not require a brightness lower than the minimum brightness of the light source.
  • the second video performance is a video performance that requires a brightness lower than the minimum brightness of the light source.
  • Correcting the video presentation includes correcting the second video presentation to use a brightness that is greater than or equal to the minimum brightness of the light source.
  • Projecting the video including the corrected video performance inside the dome includes superimposing and projecting the uncorrected first video performance and the corrected second video performance inside the dome.
  • the storage unit stores setting items for the star.
  • the star setting items include settings for the star magnitude and brightness ratio.
  • the control unit is configured to be able to determine the brightness of the star by referring to the setting items for the star. Analyzing the video includes determining, based on the determined brightness of the star, whether the video including the star includes a video effect that requires a brightness less than the minimum brightness of the light source.
  • the storage unit stores setting items for brightness adjustment conditions.
  • the brightness adjustment condition setting items include one or more settings of the brightness of each celestial body, the distance from the sun, and the shadow intensity.
  • the control unit is configured to be able to determine the brightness of the celestial body by referring to the brightness adjustment condition setting items. Analyzing the video includes determining, based on the determined brightness of the celestial object, whether the video including the celestial object includes a video effect that requires a brightness lower than the minimum brightness of the light source.
  • the video presentation includes a fade-in or a fade-out.
  • Correcting the video effect means that if the video effect is a fade-in, the lowest brightness of the light source is the initial brightness of the fade-in, and the fade-in curve is corrected so that it passes through the initial brightness of the fade-in after correction.
  • the minimum brightness of the light source is set as the final brightness of the fade-out, and the curve of the fade-out is corrected so as to pass through the final brightness of the fade-out after correction.
  • correcting the video effect involves expressing a fade-in or fade-out by changing the density of the emitting light source based on the fact that the video effect includes a dark image effect that cannot be expressed by correcting the brightness of the light source. Including.
  • the video includes a video presentation that includes text.
  • the storage unit stores character setting items.
  • the character setting items include character brightness and color settings.
  • the control unit is configured to be able to determine the brightness of the characters by referring to the setting items for the characters. Analyzing the video includes determining, based on the determined brightness of the characters, whether the video including the characters includes a video effect that requires a brightness lower than the minimum brightness of the light source.
  • the video includes a video presentation that includes representation by lines.
  • the storage unit stores setting items for line representation.
  • Setting items for line expression include brightness and color settings for line expression.
  • the control unit is configured to be able to determine the brightness of the line expression by referring to the line expression setting items. Analyzing the video includes determining, based on the determined brightness of the line representation, whether the video including the line representation includes a video effect that requires a brightness less than the minimum brightness of the light source. .
  • analyzing the video includes determining whether the video includes a video presentation that includes a celestial body moving at a speed greater than or equal to a predetermined threshold. Correcting the video performance is based on the fact that the video performance includes a celestial body that moves at a speed equal to or higher than a predetermined threshold, and the video performance is not corrected, but the video representation moves at a speed equal to or higher than a predetermined threshold. This includes correcting the video presentation based on the fact that it does not include any celestial bodies.
  • analyzing the video includes determining whether the video includes an atmospheric video presentation. Correcting the video presentation includes not correcting the video presentation based on the fact that the video presentation includes an atmosphere, and correcting the video presentation based on the fact that the video presentation does not include an atmosphere.
  • the video includes a video effect whose brightness changes depending on the date and time within the video.
  • the storage unit stores settings for date and time parameters of a video presentation whose brightness changes depending on the date and time in the video. Analyzing the video includes referring to the settings of the date and time parameters and determining whether a video presentation whose brightness changes depending on the date and time in the video requires a brightness that is less than the minimum brightness of the light source.
  • control unit provides selection information as to whether or not to correct the video presentation based on the fact that the video to be projected inside the dome includes a video presentation that requires a brightness lower than the minimum brightness of the light source.
  • a warning including the above is output to the operator, and the video performance is corrected based on receiving a request for correction of the video performance from the operator.
  • FIG. 2 is a diagram illustrating an example of a method for realizing low-luminance video production by the planetarium system 200 according to the present embodiment.
  • 2 is a diagram showing an example of a system configuration of a planetarium system 200.
  • FIG. 2 is a diagram illustrating an example of the hardware configuration of a device 201.
  • FIG. 2 is a diagram showing an example of the configuration of functional blocks of the device 201.
  • FIG. It is a figure which shows an example of the data contained in stellar information DB412. It is a figure which shows an example of the image of the data contained in brightness adjustment condition DB413. It is a figure which shows an example of the brightness correction of a video production by the density change of LED230 which emit light.
  • FIG. 3 is a diagram illustrating an example of a scene that requires brightness correction for video production.
  • 3 is a diagram illustrating a first example of the flow of brightness correction processing for video presentation by the planetarium system 200.
  • FIG. 7 is a diagram illustrating a second example of the flow of brightness correction processing for video presentation by the planetarium system 200.
  • FIG. 2 is a diagram showing a first example of the flow of projection processing by the planetarium system 200.
  • FIG. 7 is a diagram showing a second example of the flow of projection processing by the planetarium system 200.
  • video includes any moving images and still images projected onto the dome of the planetarium. Additionally, a video may include one or more video effects.
  • video production refers to various video contents included in the video.
  • the video includes a first video presentation about the Milky Way and a second video presentation about other celestial bodies.
  • the planetarium system 200 superimposes the first video performance and the second video performance and displays them as one video on the dome.
  • the planetarium system 200 can individually control each video presentation.
  • the planetarium system 200 may control the first video presentation to fade out the Milky Way while leaving the second video presentation unchanged (without changing the brightness of the celestial bodies).
  • the planetarium system 200 can simultaneously reproduce various celestial phenomena on the dome by individually controlling each video presentation included in the video.
  • system includes a configuration consisting of one or more devices, a server, a virtual machine or container built in a cloud environment, or a system configured from at least a portion of these.
  • the system may include an information processing device such as a personal computer, a workstation, a server device, a tablet, or a smartphone, a projection device such as a planetarium dome, a console device, an LED panel, and a controller for the projection device, or , some or all of these may be combined.
  • a part of the control device or the storage unit may be located in a cloud environment.
  • the "minimum brightness of an LED” is the minimum brightness that can be expressed by the LED 230 (see FIG. 2).
  • the LED 230 emits light when energized, but the LED 230 can only emit light at a certain brightness or higher. Therefore, the LED 230 can only realize image expression with brightness above this certain level.
  • gradient, brightness, and brightness refer to the stage of change in color or brightness.
  • Gradation is often used as a brightness or brightness setting on a system. For example, when the gradation is 256, the planetarium system 200 can change the brightness of the LED 230 in 256 steps.
  • celestial body is a general term for objects in outer space (stars, gas, geographies, asteroids, etc.). Furthermore, the term “star” refers to a celestial body that shines with its own energy. Celestial bodies include fixed stars.
  • “fade in”, “fade out”, “change in brightness”, etc. refer to a process in which the planetarium system 200 changes the brightness of the LED 230 stepwise or abruptly. More specifically, the planetarium system 200 can change the brightness of the LED 230 at regular intervals, such as 100 milliseconds. For example, the planetarium system 200 can realize a fade-out video expression by lowering the brightness of the LED 230 (reducing the gradation) at regular intervals.
  • the planetarium system 200 can connect still images (scenes) to express one video performance (video) by continuously changing the brightness of each LED in the dome at a constant cycle. Therefore, each video presentation has the brightness of the LEDs necessary to realize each video presentation or each scene.
  • the planetarium system 200 can correct the required brightness (required gradation) of 50 for a certain video production to the required brightness (required gradation) of 100.
  • the planetarium system 200 may express the video performance with corrected brightness by converting the video performance itself.
  • the planetarium system 200 may express the video performance with corrected brightness by changing the command value sent to the LED or its controller without processing the video performance.
  • FIG. 1 is a diagram illustrating an example of a method for realizing low-luminance video production using a planetarium system 200 according to the present embodiment.
  • a method will be described in which the planetarium system 200 uses the LEDs 230 to express a video effect that requires a brightness lower than the minimum brightness of the LEDs 230.
  • Graph 100A shows time-series luminance in fade-in video production. More specifically, the graph 100A is a graph that smoothly connects the brightness of the video effects at timings 101, 102, and 103. Note that the brightness here is the brightness of the LED 230 necessary to express any scene of the video production.
  • the starting brightness 111 is the first brightness in the fade-in video effect.
  • the final brightness 113 is the final brightness in the fade-in video effect.
  • the minimum brightness 112 is the minimum brightness that the LED 230 can express.
  • the planetarium system 200 can express the video effect of the graph 100A by periodically changing the brightness of the LED 230 from the starting brightness 111 to the final brightness 113 (at timings 101, 102, and 103).
  • the LED 230 cannot express the brightness at timings 101 and 102.
  • the planetarium system 200 projects the video presentation of the graph 100A onto the dome, it appears to the audience that the LED 230 suddenly lights up at timing 103. Therefore, the planetarium system 200 corrects the brightness at timings 101 and 102 below the minimum brightness 112 to a brightness higher than the minimum brightness 112.
  • Graph 100B shows the time-series luminance in the fade-in video performance after correction. More specifically, the graph 100B is a graph that smoothly connects the corrected brightness of the video effect at timings 101, 102, and 103.
  • the planetarium system 200 Comparing the graph 100A before brightness correction and the graph 100B after brightness correction, in graph 100B, the brightness at timings 101 and 102 exceeds the lowest brightness 112. In this way, the planetarium system 200 corrects the brightness of the video performance that is lower than the minimum brightness 112 to be equal to or higher than the minimum brightness 112 when the brightness of the video performance is lower than the minimum brightness 112 of the LED 230. By doing so, the planetarium system 200 can also express a fade-in video effect that cannot be expressed with ordinary LED elements.
  • the planetarium system 200 may set the lowest luminance before correction as the lowest luminance (reference value) of the LED 230, and may correct other luminances so that their relative magnitudes do not change. Taking the graphs 100A and 100B as an example, the planetarium system 200 sets the starting brightness 111 (the lowest brightness before correction) to the lowest brightness 112 of the LED 230. Furthermore, the planetarium system 200 corrects the brightness at timing 102 to a value between the minimum brightness 112 (starting brightness after correction) and the final brightness 113 (so that the mutual magnitude relationship does not change).
  • Graph 120A shows time-series luminance in a fade-out video production. More specifically, the graph 120A is a graph in which luminances at timings 121, 122, and 123 are smoothly connected. Note that the brightness here is the brightness of the LED 230 necessary to express any scene of the video production.
  • the starting brightness 131 is the first brightness in the fade-out video effect.
  • the final brightness 133 is the final brightness in the fade-out video effect.
  • the planetarium system 200 can express the video effect of the graph 120A by periodically changing the brightness of the LED 230 from the starting brightness 131 to the final brightness 133 (at timings 121, 122, and 123).
  • the brightness of the video presentation at timings 122 and 123 is lower than the minimum brightness 112. Therefore, the LED 230 cannot express the brightness at timings 122 and 123.
  • the planetarium system 200 projects the video presentation of the graph 120A onto the dome, it appears to the audience that the LED 230 suddenly goes out at timing 122. Therefore, the planetarium system 200 corrects the brightness at timings 122 and 123 below the minimum brightness 112 to a brightness higher than the minimum brightness 112.
  • Graph 120B shows time-series luminance in the fade-out video performance after correction. More specifically, the graph 120B is a graph that smoothly connects the corrected brightness of the video effect at timings 121, 122, and 123.
  • the planetarium system 200 can also express a fade-out video effect that cannot be expressed with ordinary LED elements.
  • the planetarium system 200 sets the lowest brightness before correction to the lowest brightness (reference value) of the LED 230 regarding fade-in/fade-out video effects, and sets the other brightnesses so that their relative magnitudes do not change. It can be corrected to Taking the graphs 120A and 120B as an example, the planetarium system 200 sets the final brightness 133 (the lowest brightness before correction) to the lowest brightness 112 of the LED 230. Furthermore, the planetarium system 200 corrects the brightness at timing 122 to a value between the minimum brightness 112 (final brightness after correction) and the start brightness 121 (so that the mutual magnitude relationship does not change).
  • a graph 140 shows the luminance of the LED 230 in time series during the first fade-in video production.
  • Graph 150A shows the luminance of LED 230 in time series in the second fade-in video production.
  • the graph 140 does not include a luminance lower than the lowest luminance 112 at any of the timings 141, 142, and 143.
  • the brightness at timings 141 and 142 is less than the minimum brightness 112.
  • the images projected onto the dome may include one or more image effects.
  • the planetarium system 200 superimposes the video effects shown in the graphs 140 and 150A and projects them onto the dome.
  • the video representation shown in graph 140 appears to be fading in normally.
  • the video expression shown in the graph 150A appears as if the LED 230 suddenly emitted light at timing 143.
  • a plurality of video effects such as fade-ins are simultaneously projected onto the dome, if some of the image effects are not expressed normally, the image effects that are not expressed normally will stand out.
  • the planetarium system 200 selects a video effect that includes a brightness with a minimum brightness of 112 or more. Correct so that it can be expressed only by the brightness of the image.
  • the planetarium system 200 corrects the brightness of the graph 150A at timings 141 and 142 to a brightness equal to or higher than the minimum brightness 112. In this way, to the audience, both the video performance shown in the uncorrected graph 140 and the video performance shown in the corrected graph 150B appear to be fading in normally.
  • the above processing can be realized by the device 201 (see FIG. 2) of the planetarium system 200 and its peripheral equipment. More specifically, the device 201 includes a CPU (Central Processing Unit) 1 (see FIG. 3) and a secondary storage device 3 (see FIG. 3).
  • the CPU 1 analyzes the image read out from the secondary storage device 3 and to be displayed inside the dome. Next, based on the fact that the image to be projected inside the dome includes a video effect that requires a brightness lower than the minimum brightness of the LED 230, the CPU 1 performs a video effect to use a brightness higher than the minimum brightness of the LED 230. to correct.
  • the video presentation that requires a brightness lower than the minimum brightness of the LED 230 is the video presentation of each of the graphs 100A, 120A, and 150A.
  • the CPU 1 projects an image including the corrected image effect inside the dome.
  • the video includes a first video performance and a second video performance.
  • the first video production is a video production that does not require a brightness lower than the minimum brightness of the LED 230 (such as the video production shown in graph 140), and the second video production requires a brightness lower than the minimum brightness of the LED 230.
  • it is a video presentation (such as the video presentation of graph 150A).
  • the CPU 1 corrects the second video performance (such as the video performance in graph 150A) to use a brightness higher than the minimum brightness of the LED 230, and corrects the first video performance (such as the video performance in graph 140). do not.
  • the CPU 1 superimposes the uncorrected first video performance (such as the video performance in graph 140) and the corrected second video performance (such as the video performance in graph 150B) inside the dome to form one video. Show.
  • the video presentation includes a fade-in or a fade-out.
  • the CPU 1 sets the lowest brightness of the LED 230 as the first gradation (luminance) of the fade-in, and adjusts the fade-in curve so that it passes through the first gradation (luminance) of the fade-in after correction. Correct.
  • the CPU 1 sets the lowest brightness of the LED 230 to the last gradation (brightness) of the fade-out, and corrects the fade-out curve so that it passes through the last gradation (brightness) of the fade-out after correction. do.
  • the planetarium system 200 can express any video performance using only normal LED elements by correcting the video performance that requires a brightness lower than the minimum brightness of the LED 230.
  • FIG. 2 is a diagram showing an example of the system configuration of the planetarium system 200.
  • Planetarium system 200 includes a device 201 , an image generator 210 , a controller 220 , an LED 230 , a software user interface 241 , a terminal 242 , and a console device 243 .
  • the planetarium system 200 or the device 201 can also be said to be a planetarium simulator because it reproduces a planetarium image on a dome.
  • the device 201 controls the entire planetarium system 200.
  • the device 201 transmits a video including one or more video effects to each image generator 210 according to a planetarium program (program guide).
  • the device 201 analyzes the video (each video production) before transmission. Based on the results of the analysis, the device 201 corrects each video effect so that only the brightness higher than the lowest brightness of the LED 230 is used as necessary. When the device 201 corrects the video effect, the device 201 transmits the corrected video to each image generator 210.
  • the device 201 can accept input from an operator (user) and perform video distribution and/or video correction processing based on the input.
  • the image generator 210 generates a part of the image projected onto the dome, and controls the LED 230 based on the generated image.
  • Planetarium system 200 includes one or more image generators 210. Each image generator 210 displays a portion of the planetarium image at its assigned position on the dome. By stitching these images together, one giant image can be projected onto the dome.
  • the image generator 210 may internally store the same video as the video that the device 201 stores in the secondary storage device 3. In this case, the image generator 210 compares the divided video received from the device 201 with the video in its own device, and selects the video to be projected onto the dome from among the videos stored in its own device.
  • the device 201 may transmit the divided corrected images (each image effect) to each image generator 210.
  • image generator 210 may control LED 230 based on the received corrected image.
  • the device 201 may transmit parameters for correcting the video (each video effect) and the divided video to each image generator 210.
  • the image generator 210 may correct the image within its own device or the received image based on the received parameters, and may control the LED 230 based on the corrected image.
  • the controller 220 outputs a signal to cause the LED 230 to emit light.
  • the controller 220 can adjust the brightness and color of each LED 230 by outputting a PWM (Pulse Width Modulation) signal to each LED 230.
  • Planetarium system 200 includes one or more controllers 220.
  • Each image generator 210 sends commands to one or more controllers 220 to control a number of LEDs 230 to display images at a designated location on the dome.
  • the LEDs 230 are LEDs spread throughout the dome of the planetarium. LED 230 may be used as a light source to project an image onto the dome.
  • the LED 230 may be realized as an LED panel in which a plurality of LED elements are laid out.
  • LED 230 is a full color LED.
  • the full-color LED includes an R (red) LED element, a G (green) LED element, and a B (blue) LED element.
  • the controller 220 can cause the LEDs 230 to emit light with arbitrary brightness and color by individually controlling the PWM applied to each RGB LED element. Note that each LED 230 may have the same minimum brightness value.
  • the software user interface 241 is a user interface displayed on a display built into or connected to the device 201.
  • the terminal 242 is any information processing terminal such as a tablet, smartphone, smart glasses, or other wearable computer. Terminal 242 is configured to be able to communicate with device 201.
  • the console device 243 is configured to be able to communicate with the device 201.
  • the console device 243 is a planetarium operating device connected to the device 201.
  • An operator may operate device 201 using either software user interface 241, terminal 242, or console equipment 243. Further, the operator can refer to messages (warnings, etc.) output by the device 201 using any of the software user interface 241, the terminal 242, or the console device 243.
  • device 201, image generator 210, and controller 220 may all be realized as separate devices. In this case, device 201, image generator 210, and controller 220 are configured to be able to communicate with each other. In other aspects, some or all of device 201, image generator 210, and controller 220 may be implemented as a single piece of hardware.
  • FIG. 3 is a diagram showing an example of the hardware configuration of the device 201.
  • the device 201 includes a CPU 1 , a primary storage device 2 , a secondary storage device 3 , an external device interface 4 , an input interface 5 , an output interface 6 , and a communication interface 7 .
  • image generator 210 may also include the hardware configuration shown in FIG. 3.
  • the CPU 1 can execute programs for realizing various functions of the device 201.
  • the CPU 1 is configured by, for example, at least one integrated circuit.
  • An integrated circuit is configured by, for example, at least one CPU, at least one GPU (Graphics Processing Unit), at least one FPGA (Field Programmable Gate Array), at least one ASIC (Application Specific Integrated Circuit), or a combination thereof. You can.
  • the primary storage device 2 stores programs executed by the CPU 1 and data referenced by the CPU 1.
  • the primary storage device 2 may be implemented by DRAM (Dynamic Random Access Memory), SRAM (Static Random Access Memory), or the like.
  • the secondary storage device 3 is a nonvolatile memory, and may store programs executed by the CPU 1 and data referenced by the CPU 1. In that case, the CPU 1 executes the program read from the secondary storage device 3 to the primary storage device 2 and refers to the data read from the secondary storage device 3 to the primary storage device 2.
  • the secondary storage device 3 is a HDD (Hard Disk Drive), an SSD (Solid State Drive), an EPROM (Erasable Programmable Read Only Memory), an EEPROM (Electrically Erasable Programmable Read Only Memory), or a flash memory. realized You can.
  • the external device interface 4 can be connected to any external device such as a printer, scanner, and external HDD.
  • the external device interface 4 may be realized by a USB (Universal Serial Bus) terminal or the like.
  • the input interface 5 can be connected to any input device such as a keyboard, mouse, touch pad or game pad.
  • the input interface 5 may be realized by a USB terminal, a PS/2 terminal, a Bluetooth (registered trademark) module, or the like.
  • the output interface 6 can be connected to any output device such as a cathode ray tube display, a liquid crystal display, or an organic EL (Electro-Luminescence) display.
  • the output interface 6 may be realized by a USB terminal, a D-sub terminal, a DVI (Digital Visual Interface) terminal, an HDMI (registered trademark) (High-Definition Multimedia Interface) terminal, a display port terminal, or the like.
  • the communication interface 7 is connected to other devices via a wired network or a wireless network.
  • the communication interface 7 may be realized by a wired LAN (Local Area Network) port, a Wi-Fi (registered trademark) (Wireless Fidelity) module, or the like.
  • the communication interface 7 may transmit and receive data using communication protocols such as TCP/IP (Transmission Control Protocol/Internet Protocol) and UDP (User Datagram Protocol).
  • FIG. 4 is a diagram showing an example of the configuration of functional blocks of the device 201.
  • each functional block shown in FIG. 4 may be implemented as a program.
  • each functional block shown in FIG. 4 can be realized by the hardware configuration shown in FIG. 3 working together to execute a program.
  • a part of each functional block shown in FIG. 4 may be realized as hardware.
  • the device 201 further includes a hardware configuration corresponding to the functional blocks.
  • the device 201 includes a video acquisition section 401, a brightness calculation section 402, a curve calculation section 403, a first determination section 404, a second determination section 405, a correction section 406, and an output section 407 as functional blocks. , a warning section 408 , and a storage section 409 .
  • the storage unit 409 stores a video DB (Database) 411, a stellar information DB 412, a brightness adjustment condition DB 413, a reference value DB 414, and a correction usage condition DB 415.
  • the image acquisition unit 401 acquires the image to be projected onto the dome next from the storage unit 409.
  • the image acquisition unit 401 outputs the acquired image to the brightness calculation unit 402.
  • the video acquisition unit 401 may acquire a video in which a plurality of video performances are linked from the storage unit 409.
  • the video acquisition unit 401 may acquire individual video effects from the storage unit 409. In this case, the video acquisition unit 401 associates the acquired video effects and configures them as one video based on the planetarium program (program guide).
  • the brightness calculation unit 402 calculates the brightness of the video (each video effect) input from the video acquisition unit 401. More specifically, the brightness calculation unit 402 calculates the brightness of each video effect at regular intervals (for example, every 100 milliseconds). The brightness corresponds to, for example, the brightness at timings 101, 102, and 103 shown in FIG. 1.
  • the curve calculation unit 403 calculates a curve that passes through the luminance at each fixed period.
  • the curve corresponds to, for example, a graph 100A that passes through the brightness at timings 101, 102, and 103 shown in FIG. 1.
  • the curve calculation unit 403 may calculate a curve from the starting brightness and the final brightness. In other aspects, the curve calculation unit 403 may calculate the curve from the starting brightness, intermediate brightness values, and final brightness.
  • the first determination unit 404 determines whether the curve calculated by the curve calculation unit 403 includes light emission processing below the minimum brightness of the LED 230.
  • the determination corresponds to, for example, a process of determining whether the curve (graph 100A) shown in FIG. Further, to explain the graphs 140 and 150A in FIG. 1 as an example, the graph 150A includes a process of causing the LED 230 to emit light at a lower than the minimum brightness 112 (light emission at timing 141). On the other hand, the graph 140 does not include the process of causing the LED 230 to emit light at less than the minimum brightness 112.
  • the first determination unit 404 outputs the determination result and the brightness at each timing to the second determination unit 405.
  • the first determination unit 404 may directly use the calculation result of the brightness calculation unit 402 to determine whether the video production includes a light emission process that requires a brightness lower than the minimum brightness of the LED 230. good. In this case, the first determination unit 404 determines whether the brightness at each timing obtained from the brightness calculation unit 402 is lower than the minimum brightness of the LED.
  • the second determination unit 405 determines whether the maximum value of the light emission process included in the curve calculated by the curve calculation unit 403 is less than the minimum brightness of the LED 230.
  • the determination is, for example, a process of determining whether the maximum brightness value of the light emission process (light emission process at timing 103) included in the curve (100A) shown in FIG. 1 is less than the minimum brightness of the LED 230. Equivalent to. If the maximum luminance value of the light emission process included in the curve is less than the minimum luminance of the LED 230, the luminance of the entire video presentation is extremely low. Therefore, the planetarium system 200 cannot perform the correction process shown in FIG. 1. Therefore, the planetarium system 200 can express fade-in and fade-out by changing the density of the LEDs 230 that emit light.
  • the second determination unit 405 outputs the determination result by the first determination unit 404, the determination result by the second determination unit 405, and the luminance at each timing to the correction unit 406.
  • the second determination unit 405 directly uses the calculation result of the brightness calculation unit 402 to determine whether the maximum value of the light emission processing included in the video production is less than the minimum brightness of the LED 230. Good too. In this case, the second determination unit 405 determines whether the maximum value of the brightness at each timing of the video production is lower than the minimum brightness of the LED 230.
  • the correction unit 406 corrects the video effect based on the determination result by the first determination unit 404, the determination result by the second determination unit 405, and the brightness at each timing. For example, regarding a fade-in/fade-out video effect, the correction unit 406 can set the lowest brightness before correction as the lowest brightness of the LED 230, and correct other brightnesses so that their relative magnitudes do not change. Taking the graph 100A in FIG. 1 as an example, the correction unit 406 sets the brightness at timing 101 (the lowest brightness in the video effect) to the lowest brightness 112 of the LED 230. Next, the correction unit 406 corrects each luminance as necessary so that the magnitude relationship between the luminances at timings 101, 102, and 103 does not change.
  • the light emission at timing 102 is less than the minimum brightness 112 of LED 230, and therefore needs to be corrected.
  • the light emission at timing 103 does not need to be corrected because it has the minimum luminance 112 or more of the LED 230.
  • the correction unit 406 adjusts the brightness of each light emission process. Instead, the video effect is corrected by changing the density of the LEDs 230 that emit light.
  • the correction unit 406 outputs the result of the correction process for the video effect to the output unit 407.
  • the results of the correction processing for the video presentation may also include the results in which the video presentation was not corrected.
  • the correction unit 406 may further output the result of the correction process to the warning unit 408.
  • the output unit 407 transmits the corrected video effect to each image generator 210. In one aspect, the output unit 407 may transmit the same video effect to each image generator 210. In another aspect, the output unit 407 may transmit to each image generator 210 the video production that each image generator 210 is responsible for.
  • the output unit 407 can output various information to be presented to the operator.
  • the output unit 407 may output various information to be presented to an operator to any or all of the software user interface 241, the terminal 242, or the console device 243.
  • the warning unit 408 presents a warning to the operator based on the fact that the video production requires correction. Further, the warning unit 408 may present selection information (such as a selection button) to the operator as to whether or not to correct the video production together with the warning. As an example, the warning unit 408 may output a warning to any or all of the software user interface 241, the terminal 242, or the console device 243 for presentation to an operator. In one aspect, the output unit 407 may include a warning unit 408.
  • the storage unit 409 stores various information necessary for correcting video effects.
  • the storage unit 409 may be a database management system (DBMS).
  • DBMS database management system
  • the video DB 411, stellar information DB 412, brightness adjustment condition DB 413, reference value DB 414, and correction usage condition DB 415 are realized as relational databases.
  • the storage unit 409 may be a NoSQL type database system in any format, or may be a mere storage area.
  • the video DB 411 stores videos or video effects for the planetarium system 200 to display on the dome.
  • the video DB 411 may output one or more video effects included in the video to the video acquisition unit 401 based on receiving a video request from the video acquisition unit 401.
  • the video DB 411 may output one or more requested video performances to the video acquisition unit 401 based on receiving a request for an individual video performance from the video acquisition unit 401.
  • the stellar information DB 412 includes the magnitude of each one or more stars and the brightness ratio for each magnitude.
  • the brightness ratio is the ratio of the brightness (brightness) of each star compared to the standard brightness.
  • the brightness calculation unit 402 can adjust the brightness of the stars included in the video presentation by acquiring information on the stars included in the video presentation from the stellar information DB 412 and multiplying the reference value by the brightness ratio. That is, the planetarium system 200 (CPU 1) is configured to be able to determine the gradation (brightness) of a star (or celestial body) by referring to configuration setting items (star information DB 412) stored in the storage unit 409.
  • the planetarium system 200 determines whether the image including the star includes an image effect that requires a brightness lower than the minimum brightness of the LED 230, based on the determined gradation (brightness) of the star. obtain. Details of the stellar information DB 412 will be described later with reference to FIG. 5.
  • the brightness adjustment condition DB 413 includes conditions that affect the brightness of a celestial body and coefficients associated with each condition. Conditions that affect the brightness other than the star's magnitude include, for example, one or more of the brightness of each celestial body, its distance from the sun, and its shadow intensity. Shadow intensity refers to the density of the shadow part of a celestial body that receives light from the sun. The brightness of each celestial body included in the video presentation can be adjusted using coefficients associated with these conditions.
  • the brightness calculation unit 402 acquires conditions that affect the brightness of celestial bodies from the stellar information DB 412, and adjusts the brightness of the celestial bodies included in the video presentation.
  • the planetarium system 200 (CPU 1) is configured to be able to determine the gradation (brightness) of a celestial body by referring to the brightness adjustment condition setting items (brightness adjustment condition DB 413) stored in the storage unit 409. Furthermore, the planetarium system 200 (CPU 1) determines whether the image including the celestial object includes an image effect that requires a brightness lower than the minimum brightness of the LED 230, based on the determined gradation (brightness) of the celestial object. obtain. Details of the brightness adjustment condition DB 413 will be described later with reference to FIG.
  • the reference value DB 414 stores various reference values necessary for correction processing.
  • the reference value DB 414 stores the minimum brightness of the LED 230, the reference value of the brightness of a celestial body (such as a star), and the like.
  • the first determination unit 404 and the second determination unit 405 may acquire the lowest luminance of the LED 230 from the reference value DB 414 and execute the determination process.
  • the brightness calculation unit 402 can acquire a standard value of the brightness of a celestial body (such as a star) from the standard value DB 414 and adjust the brightness (brightness) of the celestial body (such as a star) included in the video presentation.
  • the correction usage condition DB 415 stores conditions for determining whether or not the brightness of the video performance may be corrected.
  • the correction unit 406 can refer to each condition stored in the correction usage condition DB 415 to determine whether or not to correct the brightness of the video effect.
  • the conditions include, for example, arbitrary conditions such as the fade-in/fade-out speed of the video performance, and whether or not the video performance is an atmospheric video performance.
  • the correction unit 406 does not perform the correction process if the speed of the fade-in/fade-out of the video performance exceeds a predetermined threshold (if the speed of the fade-in/fade-out is too fast). Conversely, the correction unit 406 executes correction processing when the speed of fade-in and fade-out of the video production is less than a predetermined threshold (when the speed of fade-in and fade-out is slow).
  • the planetarium system 200 determines whether the video or video presentation includes a video presentation that includes a celestial body moving at a speed equal to or higher than a predetermined threshold.
  • the planetarium system 200 (CPU 1) does not correct the video performance based on the fact that the video performance includes a celestial body moving at a speed equal to or higher than a predetermined threshold value, and the planetarium system 200 (CPU 1) does not correct the video performance based on the fact that the video performance includes a celestial body moving at a speed higher than a predetermined threshold value.
  • the video presentation can be corrected based on the fact that it does not include moving celestial bodies.
  • the correction unit 406 does not perform the correction process when the video performance includes an atmosphere (such as when the video performance is a space scene seen from the ground).
  • the correction unit 406 executes the correction process when the video performance is without atmosphere (such as when the video performance is a scene in outer space). This is because when the video effect includes an atmosphere, the brightness of the video effect is usually high and there is a high possibility that no correction is necessary.
  • the planetarium system 200 determines whether the video or video performance includes a video performance that includes an atmosphere.
  • the planetarium system 200 (CPU 1) may not correct the video performance based on the fact that the video performance includes the atmosphere, but may correct the video performance based on the fact that the video performance does not include the atmosphere.
  • FIG. 5 is a diagram showing an example of data included in the stellar information DB 412.
  • the stellar information DB 412 includes a magnitude item 501 and a brightness ratio item 502.
  • Magnitude is a unit that indicates the brightness of a celestial object.
  • the brightness ratio is the brightness linked to the magnitude, and indicates the ratio (magnification) to the brightness of the reference star.
  • the brightness calculation unit 402 adjusts the brightness of the stars included in the video presentation based on the magnitude item 501 and the brightness ratio item 502.
  • the stellar information DB 412 may include the magnitude and brightness ratio of celestial bodies other than stars.
  • the brightness calculation unit 402 can adjust the brightness of any celestial body included in the video presentation based on the magnitude item 501 and the brightness ratio item 502.
  • FIG. 6 is a diagram showing an example of an image of data included in the brightness adjustment condition DB 413.
  • the brightness condition mainly includes the distance from a fixed star (such as the sun) to the celestial body and the shadow intensity. Shadow intensity indicates the density of the shadow formed on the backside of a celestial object that receives light from a star.
  • the brightness calculation unit 402 refers to the information in the brightness adjustment condition DB 413, adjusts the brightness of a surface of a certain celestial body that receives light from a star to be high, and adjusts the brightness of a surface of a certain celestial body that receives light from a star (a shadow You can adjust the brightness of the screen to a lower level.
  • the brightness adjustment condition DB 413 may store each data shown in FIG. 6 in a table format.
  • FIG. 7 is a diagram illustrating an example of brightness correction for video production by changing the density of the LEDs 230 that emit light.
  • the Milky Way is a celestial body with very low brightness, and the brightness changes in these celestial bodies are also very small. Therefore, it is difficult to express the fade-in/fade-out of such a celestial body with very low brightness due to the change in the brightness of the LED 230. Therefore, the planetarium system 200 expresses fade-in/fade-out, etc. of a celestial object with low brightness by changing the density of the emitting LEDs 230.
  • the density settings 700 of the LED 230 that emit light include, for example, a low density setting 701, a medium density setting 702, and a high density setting 703. Note that the density change shown in FIG. 7 is an example, and the planetarium system 200 can adjust the density setting 700 of the LEDs 230 that emit light with arbitrary particle size.
  • planetarium system 200 may use a high density setting 703 to represent a central portion 710 of the Milky Way and a low density setting 701 to represent an edge portion 711 of the Milky Way.
  • the planetarium system 200 can express the fade-in of a celestial object with low brightness by changing the density of the LEDs 230 that emit light in the order of low density setting 701, medium density setting 702, and high density setting 703.
  • the planetarium system 200 can express the fade-out of a celestial object with low brightness by changing the density of the LEDs 230 that emit light in the order of high density setting 703, medium density setting 702, and low density setting 701.
  • the planetarium system 200 (CPU 1) can express fade-in or fade-out by changing the density of the emitting LEDs 230 based on the fact that the image effect includes a dark image effect that cannot be expressed by correcting the brightness of the LEDs 230.
  • FIG. 8 is a diagram showing an example of a scene that requires brightness correction for video production.
  • the planetarium system 200 can also perform brightness correction processing on any of these video effects.
  • Graph 810A shows an example of changes in the light of variable stars included in the video production.
  • a "variable star” is a celestial body whose brightness changes depending on the date and time. The change in the brightness of a celestial body is sometimes called a twinkling.
  • the graph 810A includes a portion where the brightness is lower than the minimum brightness 112 of the LED 230. Therefore, the LED 230 cannot express the portion of the graph 810A where the luminance is lower than the lowest brightness 112 of the LED 230. Therefore, the planetarium system 200 adjusts the graph 810A to the graph 810B so that the brightness does not fall below the minimum brightness 112 of the LED 230. More specifically, the planetarium system 200 adjusts the brightness of the LEDs 230 at regular intervals forming the graph 810A so that the brightness does not fall below the minimum brightness 112 of the LEDs 230.
  • Graph 820A shows an example of changes in the light of a supernova explosion included in the video production.
  • a "supernova explosion” is a phenomenon in which a star is crushed by its own gravity and explodes. The video production of a supernova explosion changes rapidly from high to low brightness.
  • the graph 820A includes a scene where the brightness of the LED 230 is lower than the minimum brightness 112 in the latter half. Therefore, the LED 230 cannot express the latter half of the video performance. Therefore, the planetarium system 200 adjusts the graph 820A as shown in the graph 820B so that the brightness of the video performance does not fall below the minimum brightness 112 of the LED 230 during the video performance. More specifically, the planetarium system 200 adjusts the brightness of the LEDs 230 at regular intervals forming the graph 820A so that the brightness does not fall below the minimum brightness 112 of the LEDs 230 until the end of the video performance.
  • Graph 830A shows an example of changes in light during crepuscular and dusk included in the video production. "Crepus" is dawn and dusk. In the crepuscular and twilight visual effects, the brightness changes gradually.
  • the graph 830A is a twilight video performance, and includes a scene where the brightness gradually decreases and falls below the minimum brightness 112 of the LED 230 in the latter half. Therefore, the LED 230 cannot express the latter half of the video performance. Therefore, the planetarium system 200 adjusts the graph 830A to the graph 830B so that the brightness of the video performance does not fall below the minimum brightness 112 of the LED 230 during the video performance. More specifically, the planetarium system 200 adjusts the brightness of the LEDs 230 at regular intervals forming the graph 830A so that the brightness does not fall below the minimum brightness 112 of the LEDs 230 until the end of the video production.
  • the video or video presentation may include a video presentation in which the brightness changes depending on the date and time within the video.
  • the storage unit 409 stores settings for date and time parameters for video production whose brightness changes depending on the date and time in the video.
  • the planetarium system 200 (CPU 1) can refer to the settings of the date and time parameters and determine whether a video presentation in which the brightness changes depending on the date and time in the video requires a brightness lower than the minimum brightness of the LED 230. ⁇ D. Flowchart> Next, an example of the operating procedure of the planetarium system 200 will be described with reference to FIGS. 9 to 12.
  • the CPU 1 may read a program for performing the processes shown in FIGS. 9 to 12 from the secondary storage device 3 into the primary storage device 2, and execute the program. In other aspects, part or all of the processing may be implemented as a combination of circuit elements configured to perform the processing.
  • the processing shown in FIGS. 9 and 10 is a video production correction process, and is executed before the video production is projected onto the dome.
  • the process shown in FIGS. 11 and 12 is a process for projecting a video effect including fade-in and fade-out onto the dome, and is executed after either the process shown in FIG. 9 or 10 is executed.
  • FIG. 9 is a diagram illustrating a first example of the flow of the brightness correction process for video presentation by the planetarium system 200.
  • step S910 the planetarium system 200 calculates the start brightness and final brightness of the fade. Taking the graph 100A in FIG. 1 as an example, this step corresponds to a process of calculating the brightness at timing 101 (starting brightness) and the brightness at timing 103 (final brightness). In one aspect, the planetarium system 200 may calculate the starting brightness, intermediate brightness (corresponding to the brightness at timing 102), and final brightness of the video performance.
  • step S920 the planetarium system 200 calculates a brightness curve from the starting brightness and final brightness.
  • this step corresponds to a process of calculating a graph 101A (brightness curve) based on the brightness at timing 101 and the brightness at timing 103.
  • the planetarium system 200 may calculate a brightness curve from the starting brightness, intermediate brightness, and final brightness of the video performance.
  • step S930 the planetarium system 200 determines whether the curve is below the reference value.
  • the reference value here is the lowest brightness 112 of the LED 230.
  • the curve being below the reference value means that the curve includes a portion below the minimum brightness 112 of the LED 230. If the planetarium system 200 determines that the curve is below the reference value (YES in step S930), the planetarium system 200 moves the control to step S940. If not (NO in step S930), the planetarium system 200 ends the process (does not perform the video effect correction process).
  • the planetarium system 200 may determine whether each of the starting brightness, intermediate brightness, and final brightness of the video performance is lower than a reference value. In this case, the planetarium system 200 executes a correction process for the video performance if any one of the start brightness, intermediate brightness, and final brightness of the video performance is below the reference value.
  • step S940 the planetarium system 200 corrects the brightness curve based on the reference value (corrects the video effect).
  • the planetarium system 200 may create settings for correcting the brightness curve based on the reference value. In this case, the settings are used in the correction process shown in FIG. 11 or 12.
  • this step sets the lowest luminance (luminance at timing 101) included in the curve (graph 100A) as the reference value (minimum luminance 112 of the LED 230), and The brightness below the minimum brightness 112 of the LED 230 (the brightness at timing 102) is adjusted to a value higher than the reference value (the minimum brightness 112 of the LED 230).
  • the magnitude relationship of the brightness at timings 101, 102, and 103 does not change.
  • FIG. 10 is a diagram illustrating a second example of the flow of the brightness correction process for video presentation by the planetarium system 200.
  • the process in FIG. 10 differs from the process in FIG. 9 in that it includes a process to change the density of the LEDs 230.
  • the processes in steps S1010, S1020, S1030, and S1060 are the same as the processes in steps S910, S920, S930, and S940, respectively, so the description of the same processes will not be repeated.
  • step S1040 the planetarium system 200 determines whether the maximum value of brightness within the video presentation is less than a reference value.
  • this step corresponds to a process of determining whether the brightness (maximum value) at timing 1053 is lower than the minimum brightness 112 (reference value) of the LED 230.
  • the control proceeds to step S1050. Otherwise (NO in step S1040), planetarium system 200 moves control to step S1060.
  • the planetarium system 200 corrects the video performance by changing the density of the LEDs 230 that emit light. More specifically, the planetarium system 200 processes the video effect so that it can be expressed by changing the density of the LEDs 230 that emit light. In some aspects, the planetarium system 200 may create settings for correcting the video presentation by varying the density of the LEDs 230 that emit light. In this case, the settings are used in the correction process shown in FIG. 11 or 12.
  • the planetarium system 200 may correct the video effect in both steps S1050 and S1060 by combining the processes of both steps S1050 and S1060.
  • FIG. 11 is a diagram showing a first example of the flow of projection processing by the planetarium system 200.
  • step S1110 the planetarium system 200 determines whether to correct the video presentation.
  • the planetarium system 200 can determine whether or not a video performance correction function in the planetarium system 200 is enabled based on a setting input from an operator. If the planetarium system 200 determines that the video presentation should be corrected (YES in step S1110), the planetarium system 200 moves control to step S1120. If not (NO in step S1110), planetarium system 200 ends the process (does not perform correction process).
  • step S1120 the planetarium system 200 determines whether the brightness curve (video effect) is below a reference value. As an example, the planetarium system 200 determines whether the brightness curve (video effect) is below the reference value (minimum brightness 112 of the LED 230) based on the execution result (presence or absence of correction) of the process in FIG. 9 or 10. can be determined. If the planetarium system 200 determines that the brightness curve (video effect) is lower than the reference value (YES in step S1120), the planetarium system 200 moves the control to step S1130. If not (NO in step S1120), planetarium system 200 ends the process (does not perform correction process).
  • step S1130 the planetarium system 200 corrects the video presentation. More specifically, planetarium system 200 controls each LED 230 based on the corrected video effect created in the process of FIG. 9 or 10. Alternatively, the planetarium system 200 may correct the video performance using the correction settings created in the process of FIG. 9 or 10, and control each LED 230 based on the corrected video performance.
  • the planetarium system 200 may control each LED 230 to change the density of the LEDs 230 that emit light. .
  • FIG. 12 is a diagram showing a second example of the flow of projection processing by the planetarium system 200.
  • the process shown in FIG. 12 differs from the process shown in FIG. 11 in that a warning is output if correction is required for the video presentation. Note that each process in steps S1210 and 1220 is the same as each process in steps S1110 and 1120, so the description of the same process will not be repeated.
  • step S1230 the planetarium system 200 notifies a warning. More specifically, planetarium system 200 outputs a warning to software user interface 241, terminal 242, and/or console device 243 indicating that correction of the video presentation is required. In some aspects, planetarium system 200 may output next processing options to the operator along with a warning. Options may be represented as buttons, for example. In addition, each option includes, for example, executing the correction, not executing the correction, the type of correction (correcting the image effect based on a reference value, correcting the image effect by changing the density of the emitting LED 230, or a combination thereof. ), etc. This allows the operator to select the appropriate option depending on the situation.
  • step S1240 the planetarium system 200 corrects the video presentation based on the operator's selection results. Note that if the selection result is "no correction", the planetarium system 200 does not correct the video presentation. That is, the planetarium system 200 (CPU 1) selects whether or not to correct the video performance based on the fact that the video to be displayed inside the dome includes a video performance that requires a brightness lower than the minimum brightness of the LED 230. Outputs an informative warning to the operator. The planetarium system 200 (CPU 1) can correct the video performance based on receiving a request to correct the video performance from the operator.
  • the planetarium system 200 outputs a warning in step S1230, but may automatically execute the correction process without receiving an instruction input from the operator. In this case, the operator can take advantage of the warning display to correct future programs.
  • the video or video presentation may include text.
  • the storage unit 409 stores character setting items such as character brightness (brightness) and color.
  • the planetarium system 200 (CPU 1) may be configured to be able to determine the gradation (brightness) of a character by referring to the setting item of the character. Furthermore, the planetarium system 200 (CPU 1) can determine whether the video including the characters includes a video effect that requires a brightness lower than the minimum brightness of the LED 230, based on the determined gradation (brightness) of the characters. .
  • the video or video performance may include a video performance that includes expression by lines.
  • the line representation is, for example, a constellation line, a constellation picture, a star trajectory line, a star orbit line, etc.
  • the storage unit 409 stores setting items for line expression such as brightness (brightness) and color of line expression.
  • the planetarium system 200 (CPU 1) may be configured to be able to determine the gradation (brightness) of the line expression by referring to the line expression setting items.
  • the planetarium system 200 (CPU 1) also determines whether the video including the line representation includes a video effect that requires a brightness lower than the minimum brightness of the LED 230, based on the determined gradation (brightness) of the line representation. It can be determined whether
  • the planetarium system 200 corrects the video performance that cannot be expressed by the LED 230, thereby making it possible to express the video performance using the LED 230 as well.
  • planetarium system 200 may correct the video presentation so that it does not fall below the minimum brightness 112 of LED 230.
  • the planetarium system 200 may correct for a dark visual presentation by changing the density of the LEDs 230 that emit light.
  • planetarium system 200 may use a combination of these correction techniques. As a result, the planetarium system 200 can express low-brightness video effects using only conventional LEDs, without requiring the addition of special hardware such as low-brightness LEDs.

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Abstract

La présente invention produit un rendu vidéo à faible luminance en utilisant une source de lumière ordinaire et en n'utilisant aucun matériel spécial. Ce système de planétarium comprend une pluralité de sources de lumière qui sont agencées à l'intérieur d'un dôme, une unité de commande qui commande l'émission de lumière provenant de la pluralité de sources de lumière, et une unité de stockage dans laquelle est stockée une vidéo destinée à être projetée à l'intérieur du dôme. L'unité de commande : analyse la vidéo lue à partir de l'unité de stockage et destinée à être projetée à l'intérieur du dôme ; corrige un rendu vidéo (100A, 120A, 150A) qui nécessite une luminance inférieure à la plus basse luminance (112) de chacune des sources de lumière sur la base de la vidéo destinée à être projetée à l'intérieur du dôme comprenant le rendu vidéo (100A, 120A, 150A), de telle sorte que la luminance qui est supérieure ou égale à la plus basse luminance (112) des sources de lumière est utilisée ; et projette une vidéo comprenant un rendu vidéo corrigé (100B, 120B, 150B) à l'intérieur du dôme.
PCT/JP2023/017866 2022-08-03 2023-05-12 Système de planétarium WO2024029154A1 (fr)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4926476B2 (ja) * 2006-01-11 2012-05-09 コニカミノルタプラネタリウム株式会社 デジタル式プラネタリウム装置
JP6751233B2 (ja) * 2016-09-12 2020-09-02 オンキヨー株式会社 映像処理装置
WO2022004866A1 (fr) * 2020-07-03 2022-01-06 有限会社大平技研 Système d'affichage et système de planétarium
JP2022022848A (ja) * 2020-07-08 2022-02-07 有限会社大平技研 自発光素子パネル、ｌｅｄパネル、及びそれらを用いたプラネタリウム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4926476B2 (ja) * 2006-01-11 2012-05-09 コニカミノルタプラネタリウム株式会社 デジタル式プラネタリウム装置
JP6751233B2 (ja) * 2016-09-12 2020-09-02 オンキヨー株式会社 映像処理装置
WO2022004866A1 (fr) * 2020-07-03 2022-01-06 有限会社大平技研 Système d'affichage et système de planétarium
JP2022022848A (ja) * 2020-07-08 2022-02-07 有限会社大平技研 自発光素子パネル、ｌｅｄパネル、及びそれらを用いたプラネタリウム

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