JP5168906B2 - Projection system, projection apparatus, optical point apparatus, projection control method, point light control method, and program - Google Patents

Description

  The present invention relates to a projection system, a projection device, a light point device, a projection control method, a point light control method, and a program suitable for presentation.

2. Description of the Related Art Conventionally, as a technique for giving a presentation that can be visually comprehensible, a transmission / reception unit that receives a control signal from a processing device and transmits information indicating a projection state to the processing device, and the control information and the projection instruction unit Based on the type of instruction from the system, a laser pointer is configured to include a control unit that controls the laser light projection unit to change the shape of the laser light. (For example, Patent Document 1)
Japanese Patent Laid-Open No. 2002-041238

  The technique described in Patent Document 1 basically transmits an operation signal corresponding to an operation on the laser pointer side, for example, a click operation or a drag operation, to the projector side by the transmission / reception unit, and the projector side performs the key operation. By generating a corresponding control signal and transmitting it to the laser pointer side, the shape of the laser beam emitted from the laser pointer is changed.

  Specifically, by operating the key switch provided on the laser pointer to the 1st stage / 2nd stage / 3rd stage, arrows (normal point indication) / circular (click) / elliptical (drag) and point The light shape is changed.

  In other words, when a key operation is performed on the laser pointer side, the projector side that receives the operation signal controls the point light shape on the laser pointer, and both the laser pointer and the projector transmit and receive signals. The configuration of the transmission / reception unit (180, 60) is essential.

  Therefore, both the laser pointer and the projector require a complicated circuit configuration, and there is a problem that the circuit scale increases.

  On the other hand, it is necessary to select and execute the key operation of the user (presenter) who always holds the laser pointer, for example, the first stage / second stage / third stage and the necessary operation in that state. If a mistake is made, there is a problem that the shape of the emitted point light also becomes a shape that is not originally desired.

  The present invention has been made in view of the above circumstances, and the object of the present invention is to provide a simpler circuit configuration, and does not require any complicated key operation or the like. An object of the present invention is to provide a projection system, a projection device, a light point device, a projection control method, a point light control method, and a program capable of automatically variably setting the state.

According to the first aspect of the present invention, a projection unit that projects an image toward a projection target and a peripheral projection image in which the point light from the optical pointer device is superimposed among the images projected by the projection unit are detected. detection means for, is characterized in that it has a transmitting means for transmitting the indication information indicating the irradiation condition to the optical pointing device in accordance with the detection result in the detecting means.

  According to the present invention, it is possible to automatically variably set the state of the point light according to the projection situation without requiring any complicated key operation or the like with a simple circuit configuration.

  An embodiment in the case where the present invention is applied to a projection system composed of a DLP (Digital Light Processing) (registered trademark) projector apparatus and a laser pointer apparatus will be described below with reference to the drawings.

  FIG. 1 shows a circuit configuration of the projector apparatus 10. In the figure, 11 is an input / output connector section. The input / output connector unit 11 includes, for example, a USB terminal for connection with an external device such as a personal computer, a mini D-SUB terminal for video input, an S terminal, an RCA terminal, a stereo mini terminal for audio input, and the like. Consists of.

  Image signals of various standards input from the input / output connector unit 11 are sent to the image conversion unit 13 via the input / output interface (I / F) 12 and the system bus SB. The image conversion unit 13 unifies the transmitted image signal into an image signal of a predetermined format, and then sends the image signal to the projection image processing unit 14.

  The projection image processing unit 14 drives the display of the micromirror element 15 that is a spatial light modulation element (SOM) based on the sent image signal. In this case, the micromirror element 15 is appropriately projected by the projection image processing unit 14 with faster time-division driving by multiplying the frame rate (for example, 60 [frames / second]), the number of color component divisions, and the number of display gradations. Display driven.

  The micromirror element 15 is irradiated with light from the light source lamp 16. More specifically, high-intensity white light emitted from the light source lamp 16, which is a high-pressure mercury lamp disposed in the reflector 17, is appropriately colored to the primary color via the color wheel 18. This primary color light is averaged by the integrator 19 and is totally reflected by the mirror 20 and then irradiated to the micromirror element 15.

  When the micromirror element 15 is irradiated with light, an optical image is formed by the reflected light, and is projected and displayed on a screen (not shown) that is a projection target via the projection lens 21.

  The projection lens 21 is provided on the front surface of the housing of the projector device 10, and in the present embodiment, the in-focus position and the zoom position (projection angle of view) can be arbitrarily changed.

  However, the light source lamp 16 is turned on, the motor (M) 22 that rotates the color wheel 18 is rotated, and the focus lens and zoom lens in the projection lens 21 are moved along the projection optical axis. M) The projection light processing unit 24 performs all the rotational driving of 23.

  The control unit 25 controls all the operations of the above circuits. The control unit 25 includes a CPU, a non-volatile memory that stores an operation program executed by the CPU including a projection operation and an imaging operation described later, a work memory, and the like.

  The control unit 25 is also connected to an imaging control unit 26, an image recording unit 27, a transmission control unit 28, and an audio processing unit 29 via the system bus SB.

  The imaging control unit 26 rotates the lens motor (M) 31 that moves the focus lens in the imaging lens 30 arranged in parallel with the projection lens 21 on the front surface of the housing of the projector device 10 along the imaging optical axis. Control. A CCD 32, which is an image sensor, is disposed behind the imaging optical axis of the photographic lens 30 and photoelectrically converts a light image formed by the photographic lens 30.

  The photographing control unit 26 receives and digitizes the analog value image signal output from the CCD 32, performs color process processing including pixel interpolation processing and γ correction processing, and then performs a digital value luminance signal Y and color difference signal Cb. , Cr are generated and output to the image conversion unit 13 via the system bus SB.

  The image conversion unit 13 compresses the luminance and color difference signals by ADCT, Huffman coding, and the like, and writes the obtained image data into the image recording unit 27 mounted as a recording medium of the projector device 10. The image recording unit 27 is composed of, for example, a flash memory, and records image data obtained by imaging.

  The projection optical axis of the projection lens 21 and the imaging optical axis of the imaging lens 30 are set in parallel, and the projection lens 21 and the imaging lens 30 are arranged close to the front surface of the housing of the projector device 10. Since the shooting angle of view by the taking lens 30 is set so as to cover the maximum projected view angle of the projection lens 21, the image projected from the projection lens 21 is reliably taken by the CCD 32 via the taking lens 30. be able to.

  The transmission control unit 28 conforms to, for example, the IEEE802.11g standard, which is one standard of wireless LAN technology, and transmits a control signal to the laser pointer device 50 described later via the antenna 33.

  The sound processing unit 29 includes a sound source circuit such as a PCM sound source, converts the sound data given during the projection operation into an analog signal, drives the speaker 34 disposed on the upper surface of the housing of the projector device 10, for example, and emits a loud sound, Alternatively, a beep sound is generated as necessary.

Note that a key input unit 35 and an Ir light receiving unit 36 are also directly connected to the control unit 25.
The key input unit 35 is a group of operation keys arranged on the upper surface of the casing of the projector device 10, for example, a power key, an AFK (Automatic Focus / Automatic Keystone correction) key, zoom up / down Keys, signal selection keys, volume up / down keys, cursor keys, etc. All of these key operation signals are directly input to the control unit 25.

The Ir light receiving unit 36 is disposed, for example, at one position on the entire surface and rear surface of the projector device 10, and receives an infrared modulation signal from a remote controller (not shown) of the projector device 10. The key operation signal corresponding to the key operated by the remote controller is converted and output to the control unit 25.
The remote controller is also provided with the same key as the key input unit 35.

  The configuration of the laser pointer device 50 that constitutes the projection system together with the projector device 10 will also be described with reference to FIG.

  The control signal oscillated from the antenna 33 of the projector device 10 is received by the reception control unit 52 via the antenna 51 on the laser pointer device 50 side.

  The reception control unit 52 demodulates the control signal from the projector device 10 received via the antenna 51 and gives the control signal to the control unit 53.

  The control unit 53 controls the entire operation of the laser pointer device 50, and includes a CPU, a non-volatile memory storing an operation program executed by the CPU including a point light projection operation described later, a work memory, and the like. Consists of.

  The control unit 53 directly inputs an operation signal of the power key 54 and outputs a drive control signal to the laser beam driving unit 55.

  Based on the drive control signal from the control unit 53, the laser light drive unit 55 drives the laser light oscillation unit 56 composed of a semiconductor laser to emit light.

  The laser beam oscillation unit 56 oscillates and outputs a red laser beam having a wavelength of about 640 nm, for example, and the laser beam from the laser beam oscillation unit 56 is projected to the outside as a point beam via the laser beam processing unit 57. Is done.

  The laser beam processing unit 57 changes the emission shape by cyclically changing the emission angle of the laser beam from the laser beam oscillation unit 56 through two mirrors whose rotation axes are orthogonal to each other. If necessary, a red laser beam is converted into a green laser beam having a wavelength of about 530 nm, for example, by inserting a crystal element for frequency conversion in the laser beam path.

  Both the rotation drive of the two mirrors that change the emission shape of the laser beam in the laser beam processing unit 57 and the insertion / removal drive for the optical path of the crystal element for converting the color of the laser beam are both performed by the control unit. This is executed based on the control signal from 53.

Next, the operation of the above embodiment will be described.
FIG. 3 shows the operation processing contents for controlling the laser pointer device 50 executed at a predetermined time, for example, at intervals of 0.5 [seconds] in parallel with the projection operation at the time of presentation on the projector device 10 side. . These operations are executed by the control unit 25 based on an operation program stored in advance.

  At the beginning of the operation, after waiting for the predetermined time to elapse (step T01), the image projected from the projection lens 21 is photographed by the CCD 32 via the photographing lens 30 (step T02). The photographing control unit 26 controls the driving of the CCD 32 to execute photographing, and causes the image recording unit 27 to record image data obtained by photographing.

  Next, the two images are compared by matching this captured image with an image formed by the micromirror element 15 and projected from the projection lens 21 (step T03). By this comparison, the point portion superimposed in the captured image is extracted and recognized, and the coordinate position with respect to the projection image is stored (step T04).

  The coordinates of the current point portion are compared with the coordinates of the point portion stored in the previous processing (step T05), and the pointer portion is determined from the previous time depending on whether or not the difference exceeds a predetermined threshold value. It is determined whether or not it has moved (step T06).

  Here, the predetermined threshold value is clearly considered in consideration of a minute shaking of the hand when the user holds the laser pointer device 50 when the user points somewhere in the projected image with the laser pointer device 50. A numerical value that seems to have moved is set in advance.

  If it is determined in step T06 that there is no movement in the point portion in the projected image, it is assumed that no variable control related to the pointer light is performed, and the process returns to step T01 again. , And wait for a predetermined time to elapse.

  On the other hand, if it is determined in step T05 that the point portion has moved, then the projection image around the point portion is recognized (step T07), and there has been a specific operation on the projector device 10 side, or from within the image. It is determined whether or not specific information can be recognized (step T08).

  Here, the operation or specific information is the zoom magnification (projection angle of view) of the projection lens 21 in the operation on the projector apparatus 10 side, and the specific information in the projection image includes the color component of the projection image being green. Whether it is an image mainly based on non-green, an image mainly composed of figures or illustrations, or an image mainly composed of text or tables It shall be.

  When the zoom magnification (projection angle of view) of the projection lens 21 is changed (enlarged or reduced) by the user's key input unit 35 or remote control key operation, the control unit 25 controls the lens motor 23 via the projection light processing unit 24. When the rotation is controlled, the control unit 25 itself determines the content.

  Whether or not the color component of the projection image is mainly green or non-green can be easily determined by obtaining a histogram for each primary color component around the point portion of the photographed projection image.

  Whether or not the projected image is mainly an image of figures or illustrations, or an image mainly of text or a table, is determined by, for example, obtaining a histogram for each primary color component around the point part of the captured projection image (= Characters and graphics) are present (= characters or graphics), and the high-frequency components obtained in the ADCT process during recording on the image recording unit 27 are present (= characters and graphics). For example, the ratio of edge components is high).

  In this case, if the character string is further cut out from the image and a blank space that seems to correspond to a space between characters or more than a predetermined value can be detected, the image is mainly composed of text or a table. If not, it can be determined that the image is mainly composed of figures and illustrations.

  However, if it is determined in step T08 that there is no specific operation on the projector apparatus 10 side and specific information cannot be recognized from the image, whether or not the end of the projection operation has been instructed next. Is determined (step T09).

  Here, when it is determined that the end of the projection operation has been instructed, the processing of FIG. 3 is also completed. On the other hand, when it is determined that the instruction has not been instructed, the processing from step T01 is performed again. Return to.

  If it is determined in step T08 that a specific operation has been performed on the projector device 10 side or specific information has been recognized from the image, the irradiation condition of the laser pointer device 50 is determined according to the content. First, it is determined whether or not the zoom magnification (projection angle of view) of the projection lens 21 has changed (enlarged or reduced) (step T10).

  If so, an instruction signal is generated to enlarge or reduce the irradiation size of the point portion on the projection screen in accordance with the direction of enlargement or reduction of the zoom angle, and the above-mentioned signal is transmitted via the transmission control unit 28 and the antenna 33. After transmitting to the laser pointer device 50 side (step T11), the process returns to the above-described step T01.

  At this time, the distance to the projection image can be obtained from the result of moving the focus lens in the photographic lens 30 by the lens motor 31 by the automatic focusing process in the photographing process of the projected image in the above-described step T02. In this case, the size of the projection image on the screen to be projected can be estimated based on the projection angle of view and the distance, and accordingly, a more appropriate point light irradiation size is set. be able to.

  If it is determined in step T10 that the zoom magnification (projection angle of view) of the projection lens 21 has not changed (enlarged or reduced), then the projected image is mainly a figure or illustration. (Step T12).

  If so, an instruction signal is generated so that the shape of the laser beam to be projected becomes a circle (small circle), and transmitted to the laser pointer device 50 side via the transmission control unit 28 and the antenna 33 ( Step T13), the process returns from the above step T01.

  If it is determined in step T12 that the projected image is not mainly composed of a figure, an illustration, or the like, it is then determined whether or not the projected image is mainly composed of text or the like consisting of a character string. (Step T14).

  If so, an instruction signal is generated so that the shape of the laser beam to be projected becomes a line (line segment) and transmitted to the laser pointer device 50 side via the transmission control unit 28 and the antenna 33 (step T15). ), The process returns to step T01.

  If it is determined in step T14 that the projected image is not mainly composed of text or the like consisting of character strings, it is then determined whether or not the color component of the projected image is mainly green. (Step T16).

  In such a case, if the laser beam emitted from the laser pointer device 50 is green, there is a high possibility that it will be difficult to recognize the pointer beam in the projected image, so an instruction signal is generated to emit the red laser beam. Then, after transmitting to the laser pointer device 50 side via the transmission control unit 28 and the antenna 33 (step T17), the process returns to step T01.

  Further, if it is determined in step T16 that the color component of the projected image is not mainly green, an instruction is given so that the green laser beam is significantly advantageous over red in terms of light emission luminance. A signal is generated and transmitted to the laser pointer device 50 side via the transmission control unit 28 and the antenna 33 (step T18), and then the process returns to step T01.

  The operation on the laser pointer device 50 side that receives the transmitted instruction signal will be described with respect to the operation on the projector device 10 side as described above.

  FIG. 4 shows the contents of processing performed in response to the operation of the power key 54 on the laser pointer device 50 side. These operations are executed by the control unit 53 based on an operation program stored in advance.

  At the beginning of the operation, the system waits for an instruction to turn on the power and to irradiate the laser beam by operating the power key 54 (step R01). The oscillator 56 is excited to emit laser light.

  At this time, in the laser beam processing unit 57, the pattern of the emitted laser beam is controlled by holding the reference position with respect to the two mirrors whose rotation axes are orthogonal to each other and suppressing the rotation operation. While making it a dot (spot), a red laser beam emitted from the laser beam oscillation unit 56 is converted into a green laser beam by inserting a crystal element for frequency conversion in the optical path (step R02). .

  Thereafter, the power key 54 is operated again to determine whether or not the power is turned off and the laser beam irradiation is stopped (step R03), and the reception control unit 52 receives the instruction signal from the projector device 10 side via the antenna 51. By repeatedly determining whether or not (step R04), it waits to enter these states.

  Therefore, when the reception control unit 52 receives an instruction signal from the projector apparatus 10 side, if this is determined in step R04, the next received instruction signal is an enlargement of the shape of the laser light emitted at that time. Alternatively, it is determined whether or not the zoom instruction indicates reduction (step R05).

  If so, the laser beam processing unit changes the size of the currently displayed shape (dot, circle, or line) in accordance with the enlargement / reduction magnification information included in the instruction information. After adjusting the rotation angle (amplitude) of the two mirrors whose rotation axes 57 are orthogonal to each other as necessary (step R06), the process returns to the processing from step R03 in preparation for the next operation.

  If it is determined in step R05 that the received instruction signal is not a zoom instruction indicating enlargement or reduction of the shape of the laser light, then whether or not the instruction signal is a circle indicating the laser light irradiation shape as a circle. Is determined (step R07).

  In such a case, one of the two mirrors of the laser beam processing unit 57 is rotated in synchronism with a sine wave and the other is synchronized with a cosine wave so that the emitted laser beam is cyclic in a short cycle. After the circle is drawn and adjusted to be a circle with the naked eye (step R08), the processing returns to step R03 in preparation for the next operation.

  If it is determined in step R07 that the received instruction signal is not an instruction for setting the laser light irradiation shape as a circle, it is then determined whether or not the instruction signal is for setting the laser light irradiation shape as a line. (Step R09).

  In such a case, only one of the two mirrors of the laser beam processing unit 57 is rotated in a pendulum shape with a predetermined amplitude, so that the emitted laser beam is circulated on the line segment in a short cycle. Are adjusted so as to be one line with the naked eye (step R10), and the process returns to step R03 in preparation for the next operation.

  If it is determined in step R09 that the received instruction signal is not an instruction for setting the laser light irradiation shape as a line, it is then determined whether or not the instruction signal is for setting the color of the laser light to red ( Step R11).

  If so, the red laser emitted from the laser light oscillator 56 is moved by moving the frequency conversion crystal element for insertion into the optical path in the laser light processor 57 to a position off the optical path. After setting to project the light as it is (step R12), the process returns to step R03 in preparation for the next operation.

  If it is determined in step R11 that the laser light color is an instruction signal for red, the laser light processing unit 57 is moved as it is to insert a crystal element for frequency conversion in the optical path. The red laser light emitted from the laser light oscillation unit 56 is converted into green (step R13), and the process returns to the process from step R03 in preparation for the next operation.

  If it is determined in step R03 that the power key 54 has been operated, the processing in FIG. 4 is completed, and the laser pointer device 50 is turned off to stop emitting laser light.

  In this way, the laser beam emission state required at that time is automatically detected on the projector device 10 side, and the laser beam emission state is unilaterally changed from the projector device 10 to the laser pointer device 50. Since the instruction is transmitted and the laser pointer device 50 only receives the instruction and executes the change instruction as appropriate, the circuit configurations of the projector device 10 and the laser pointer device 50 are made as simple as possible. On the laser pointer device 50 side, no complicated key operation other than the power key 54 is required, and the state of the point light can be automatically variably set according to the projection situation.

  In particular, the projector device 10 has a zoom function for changing the projection angle of view as in a general projector device, and the size of the emission pattern of the laser beam emitted from the laser pointer device 50 is set according to the projection angle of view. It was supposed to be changed.

  Accordingly, the size of the pointer can be increased if the projected image is large, and the size of the point light can be decreased if the projected image is small, depending on the projection angle of view of the projector device 10. Can be the appropriate size.

  In this case, as described above, it is possible to obtain not only the projection angle of view but also, for example, an automatic focusing process. If the point light size is set in consideration of the distance to the projection target, it is easier to see. Can be selected.

  Furthermore, in the above embodiment, the color component is recognized by the image around the point light in the projection image, and the point light of a color different from the recognized color component is automatically switched so as to be irradiated. The position of the point light can always be visually confirmed without being affected by the color of the image to be projected.

  In the above embodiment, the shape of the point light is automatically determined depending on whether the pattern of the image to be projected is mainly a figure, an illustration, or the like, or mainly a character string or a table. Therefore, even in a presentation or the like, it is possible to execute pointing of a more appropriate part without a complicated operation of a user having the laser pointer device 50.

  Furthermore, in the above embodiment, as a means for detecting the state of the projected image, the projected image is captured as it is including the projection state of the pointer light, and the contents are determined from the captured image. Thus, the projection state can be grasped accurately, and the captured image can be recorded in the image recording unit 27 as it is as the history of the projection operation.

  For this reason, for example, if it is recorded together with the date and time of projection and other reference data, it can be used as a result of a presentation or the like at a later date.

  In addition, although the said embodiment demonstrated the case where it applied to the projection system which consists of a projector apparatus and laser pointer apparatus of a DLP (trademark) system, this invention is not limited to this, If it is a projector apparatus One that uses a color liquid crystal panel, one that uses a plurality of high-luminance primary color LEDs as the light source, and that drives the light that irradiates a monochrome display element in a time-sharing manner, etc., and the pointer device is not a laser beam but a high-luminance LED It may be one using.

  In addition, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention in the implementation stage. In addition, the functions executed in the above-described embodiments may be combined as appropriate as possible. The above-described embodiment includes various stages, and various inventions can be extracted by an appropriate combination according to a plurality of disclosed structural requirements. For example, even if several constituent requirements are deleted from all the constituent requirements shown in the embodiment, if the effect can be obtained, a configuration from which the constituent requirements are deleted can be extracted as an invention.

1 is a block diagram showing a functional circuit configuration of a projector device according to an embodiment of the present invention. The block diagram which shows the functional circuit structure of the laser pointer apparatus which concerns on the embodiment. 6 is a flowchart showing a part of processing contents executed by the projector device according to the embodiment during a presentation operation. The flowchart which shows the processing content which the laser pointer apparatus which concerns on the embodiment performs.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Projector apparatus, 11 ... Input / output connector part, 12 ... Input / output interface (I / F), 13 ... Image conversion part, 14 ... Projection image processing part, 15 ... Micromirror element (SOM), 16 ... Light source lamp, DESCRIPTION OF SYMBOLS 17 ... Reflector, 18 ... Color wheel, 19 ... Integrator, 20 ... Mirror, 21 ... Projection lens, 22 ... Motor (M), 23 ... Lens motor (M), 24 ... Projection light processing part, 25 ... Control part, 26 DESCRIPTION OF SYMBOLS ... Shooting control part, 27 ... Image recording part, 28 ... Transmission control part, 29 ... Sound processing part, 30 ... Shooting lens, 31 ... Lens motor (M), 32 ... CCD, 33 ... Antenna, 34 ... Speaker, 35 ... Key input unit 36 ... Ir light receiving unit 50 ... Laser pointer device 51 ... Antenna 52 ... Reception control unit 53 ... Control unit 54 ... Power key 55 ... Laser light drive unit 5 ... laser oscillation unit, 57 ... laser process unit, SB ... system bus.

Claims (12)

Projection means for projecting an image toward the projection target;
Detecting means for detecting a peripheral projection image on which the point light from the optical pointer device is superimposed, among the images projected by the projection means;
And transmitting means for transmitting the indication information indicating the irradiation condition to the optical pointing device in accordance with the detection result of the detection means
A projection apparatus comprising: The projection means of the projection device has a zoom function for changing the angle of view of the image to be projected,
The detection means detects at least the angle of view of the image projected by the projection means,
It said transmission means, projection device according to claim 1, wherein <br/> that instructing a change of the irradiation size of the point light in the optical pointing device in accordance with a detection result of the above detection means. The detection unit of the projection device detects a field angle of an image projected by the projection unit and a distance to a projection target,
It said transmission means, projection device according to claim 2, wherein the instructing a change of the irradiation size of the point light in the optical pointing device in accordance with a detection result of the above detection means. The detection means of the projection device detects a color component of a peripheral projection image on which the point light is superimposed, among images projected by the projection means,
The projection apparatus according to claim 1, wherein the transmission means instructs to change the color of the point light in the optical pointer device in accordance with a detection result in the detection means. The detection unit of the projection apparatus detects a pattern type of a peripheral projection image on which the point light is superimposed, from among images projected by the projection unit,
The projection apparatus according to claim 1, wherein the transmission means instructs to change the shape of the point light in the optical pointer device in accordance with the detection result in the detection means. The detection unit of the projection apparatus includes an imaging unit that captures an image projected by the projection unit, and a comparison unit that detects an image projection state by comparing an image obtained by the imaging unit and an image projected by the projection unit. The projection apparatus according to claim 1, comprising: A projection apparatus including a projection unit that projects an image toward a projection target;
It consists of a light point device equipped with light emitting means that emits point light,
The projection apparatus is
Detecting means for detecting a projected image around the point light superimposed on the image projected by the projecting means;
Transmission means for transmitting instruction information for instructing irradiation conditions to the optical pointer device according to the detection result of the detection means,
The light point device is
Receiving means for receiving the instruction information;
A projection system , further comprising: a light processing unit configured to process the point light emitted from the light emitting unit according to the instruction information received by the receiving unit and emit the point light . Light emitting means for emitting emit point light,
Receiving means for receiving instruction information for instructing an irradiation condition determined based on a surrounding projection image on which the point light is superimposed, among the projection images projected by the projection device;
An optical point device comprising: light processing means for processing the point light emitted by the light emitting means according to the instruction information received by the receiving means and emitting the processed light. A projection control method in a projection apparatus including a projection unit that projects an image toward a projection target,
A detection step of detecting a peripheral projection image on which the point light from the optical pointer device is superimposed, among the images projected by the projection unit;
A projection control method comprising: a transmission step of transmitting instruction information for instructing an irradiation condition to the optical pointer device in accordance with a detection result in the detection step. A point light control method for an optical point device that emits and emits point light,
A receiving step of receiving instruction information for instructing an irradiation condition determined based on a surrounding projection image on which the point light is superimposed, among the projection images projected by the projection device;
A point light control method, comprising: a light processing step of processing the point light according to the instruction information received in the receiving step and emitting the processed light. A program executed by a computer built in a projection apparatus including a projection unit that projects an image toward a projection target,
A detection step of detecting a peripheral projection image on which the point light from the optical pointer device is superimposed, among the images projected by the projection unit;
A program for causing a computer to execute a transmission step of transmitting instruction information for instructing an irradiation condition to an optical pointer device in accordance with a detection result in the detection step. A program executed by a computer built in a light point device that emits and emits point light,
A receiving step for receiving instruction information for instructing an irradiation condition determined based on a surrounding projected image on which the point light is superimposed among the projected images projected by the projection device, and the receiving step for the point light A program that causes a computer to execute a light processing step of performing processing according to the instruction information received in step 1 and emitting the processed light.

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