JP2007060272A - Projector, photographing method of projection image and program - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To surely photograph color-balanced projection images in the projector of a type for performing time division projection drive for each of a plurality of color components of color images. <P>SOLUTION: The projector comprises: a projection system including a light source lamp 27, a micromirror element 25 and a projection lens 12 for projecting and displaying respective images in a time division manner for every color component by using a color wheel 28 for inputted color image signals; a photographing system including a photographing lens 13, a CCD 38 and a process circuit 35 for photographing the projected and displayed image according to the instruction when the photographing of the projected and displayed image is instructed; and a control part 34 for detecting the rotating position of the color wheel 28 by a marker sensor 33 and executing the photographing for each of the plurality of color components in the photographing system at a shutter speed corresponding to a time division cycle in synchronism with each time division cycle for every color component in the projection system. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a projection apparatus having a photographing function capable of photographing projection content and leaving it as a record, a projection image photographing method, and a program.

  In recent years, with the spread of personal computers, portable projector apparatuses that can perform various presentations and demonstrations by connecting to notebook type or handheld type personal computers are becoming more familiar.

  In this type of projector apparatus, a transmissive color liquid crystal panel is used as an element for forming a light image, and a DLP (Digital Light Processing) (registered trademark) system using an optical semiconductor element called a micromirror element. There is.

  The DLP (registered trademark) projector device uses high-intensity white light from a light source lamp in the same circumferential shape as red (red), green (green), blue (blue), and white (transparent) color filters (segments). ) Is rotated and driven in a time-sharing manner (accurately, only the light of the color component is transmitted), and then the light corresponding to the color component is rotated. The light is reflected by a micromirror element that is driven to form an image, and the reflected light is projected onto a projection target screen or the like via a lens of a projection optical system.

  Further, even in a projector apparatus using a liquid crystal display panel called a field sequential method, the light source lamps of R, G, and B colors are driven to be lit in a time-sharing manner, and the color is displayed on a monochrome liquid crystal display panel during each lighting period. In terms of displaying an image corresponding to a component, the DLP (registered trademark) projector apparatus and the basic concept thereof are approximated.

  However, there is a need to record the image projected as described above with a digital camera prepared separately, for example, to make a minutes. However, in the projector apparatus that performs time-division driving for each color component that constitutes an image as described above, there is a high possibility that an image whose color balance is greatly lost depending on the timing of shooting is recorded.

In addition, it is not shooting for recording a projected image, but by incorporating a shooting mechanism into the projector device and integrating it, the distortion in the vertical and horizontal directions of the projected image can be determined from the distance values to multiple locations during shooting. A technique that detects and feeds back to the projection system and automatically corrects the keystone has been considered. (For example, Patent Document 1)
JP 2004-208089 A

  The technique of the above-mentioned patent document 1 is to obtain distance values to a plurality of positions of an image in order to perform automatic trapezoidal correction by a contrast-type distance measuring function of an imaging mechanism. Since it should be possible, no consideration is given to the color balance of the photographed image.

  The present invention has been made in view of the above-described circumstances, and an object of the present invention is a projection apparatus that uses time-division projection driving for each of a plurality of color components of a color image. It is an object of the present invention to provide a projection apparatus, a projection image capturing method, and a program capable of reliably capturing images.

  According to the first aspect of the present invention, a projection unit that projects and displays each image for each of a plurality of color components in a time-division manner with respect to an input color image signal, and instructs to shoot an image projected and displayed by the projection unit Instructing means, photographing means for photographing an image projected and displayed by the projecting means, and when photographing is instructed by the instructing means, it is synchronized with each time division timing for each color component in the projecting means, and And a photographing control means for performing photographing for each of a plurality of color components by the photographing means at a shutter speed corresponding to a time division cycle.

  The invention described in claim 2 is characterized in that, in the invention described in claim 1, the shutter speed is an integral multiple of the time division period.

  According to a third aspect of the present invention, in the first aspect of the present invention, the projection unit divides and arranges a plurality of color filters on the same circumference, and selectively drives white light from the light source by rotating the filter. A color wheel that transmits light of the color component; and a detection mechanism that detects a rotational phase of the color wheel, and the imaging control unit is configured to detect the color component in the projection unit based on a detection signal from the detection mechanism. Shooting synchronized with each time-sharing timing is executed.

  According to a fourth aspect of the invention, there is provided the invention according to the third aspect, wherein the photographing means uses a monochrome imaging element not provided with a color filter.

  The invention according to claim 5 is a projection provided with a projection unit for projecting and displaying each image for each of a plurality of color components in a time-division manner with respect to an input color image signal and a photographing unit for photographing the projected and displayed image. A method for photographing a projected image in the apparatus, wherein an instruction step for instructing photographing of an image projected and displayed in the photographing step, and when photographing is instructed by the instruction instruction, each of the color components in the projection unit And a photographing control step of performing photographing for each of a plurality of color components by the photographing unit at a shutter speed corresponding to the time division period.

  According to a sixth aspect of the present invention, there is provided a projection unit for projecting and displaying each image in a time-division manner for each of a plurality of color components with respect to an input color image signal, and a projection unit for photographing a projected and displayed image. A program executed by a computer incorporated in the apparatus, which includes an instruction step for instructing image capturing in this imaging step, and each time for each color component in the projection unit when imaging is instructed in this instruction step The computer is caused to execute an imaging control step of executing imaging for each of a plurality of color components by the imaging unit at a shutter speed corresponding to a time division cycle in synchronization with the division timing.

  According to the first aspect of the present invention, in order to execute shooting for each of the plurality of color components at the shutter speed corresponding to the time division cycle in synchronization with each time division timing for each color component of the projected image, A projected image with a well-balanced color can be taken reliably.

  According to the second aspect of the invention, in addition to the effect of the first aspect of the invention, it is possible to perform photographing in an appropriate exposure state corresponding to the brightness of the projected image.

  According to the third aspect of the present invention, in addition to the effect of the first aspect of the invention, it is possible to easily realize shooting of a projected image with a color balance accurately synchronized with the rotation of the color wheel.

  According to the invention described in claim 4, in addition to the effect of the invention described in claim 3, the circuit configuration of the photographing system including the image sensor can be greatly simplified, and the color filter is provided on the image sensor side. Therefore, the attenuation of incident light is minimized, and the projection light can be used effectively for photographing.

  According to the invention described in claim 5, in order to execute shooting for each of the plurality of color components at a shutter speed corresponding to each time division period and in synchronization with each time division timing for each color component of the projected image. A projected image with a well-balanced color can be taken reliably.

  According to the invention of claim 6, in order to execute shooting for each of the plurality of color components at a shutter speed corresponding to the time division cycle in synchronization with each time division timing for each color component of the projected image. A projected image with a well-balanced color can be taken reliably.

  Hereinafter, an embodiment in which the present invention is applied to a projector apparatus will be described with reference to the drawings.

  FIG. 1 shows the external configuration of the projector apparatus 10 according to the embodiment, and mainly shows the configuration of the front and top surfaces of the housing. As shown in the figure, a projection lens 12 and a photographing lens 13 are embedded on the right side of a part of the front surface of the rectangular parallelepiped main body casing 11. An Ir receiver 14 is disposed on the front and left end sides of the main casing 11.

  The projection lens 12 is for projecting a light image formed by a spatial light modulation element such as a micromirror element, which will be described later, onto an object such as a screen, and here, a focus position and a zoom position (projection angle of view). Is arbitrarily variable.

  The photographing lens 13 is for photographing an image projected and displayed by the projection lens 12. The photographing lens 13 can also change the focus position and the zoom position, and in particular, the zoom position is the zoom of the projection lens 12. It is controlled in conjunction with the position, and is controlled so as to always have an imaging range corresponding to the size of the image projected from the projection lens 12.

  The Ir receiver 14 receives an infrared light (Ir) signal on which a key operation signal from a remote controller of the projector device 10 (not shown) is superimposed.

A key switch unit 15 and a speaker 16 are disposed on the upper surface of the main body casing 11.
The key switch unit 15 includes various key switches for instructing power on / off of the apparatus, input switching, automatic focusing, automatic keystone correction, and the like.

  The speaker 16 emits a sound of the input audio signal and a beep sound during operation.

Although not shown, an input / output connector section, an Ir receiving section similar to the Ir receiving section 14 and an AC adapter connecting section are disposed on the back surface of the main casing 11.
The input / output connector unit includes, for example, a USB terminal for connection to 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. .

  The AC adapter connection unit connects a cable from an AC adapter (not shown) serving as a power source.

Next, the functional configuration of the electronic circuit of the projector apparatus 10 will be described with reference to FIG.
In the figure, image signals of various standards input from the input / output connector unit 21 are unified into image signals of a predetermined format by the image conversion unit 23 via the input / output interface (I / F) 22 and the system bus SB. Later, it is sent to the projection image processing unit 24.

  The projection image processing unit 24 generates a video signal from the sent image signal, and appropriately multiplies the frame rate, for example, 60 [frames / second], the number of color component divisions, and the number of display gradations, to obtain a higher speed. For example, the micromirror element 25 which is a spatial light modulation element (SOM) is driven to display by time division driving.

  High-luminance white light emitted from the light source lamp 27 disposed in the reflector 26 is appropriately colored to the micromirror element 25 through the color wheel 28 and irradiated through the integrator 29 and the mirror 30. As a result, an optical image is formed by the reflected light, and is projected and displayed on a screen (not shown) through the projection lens 12.

  However, both the lighting driving of the light source lamp 27 and the motor (M) 31 that rotationally drives the color wheel 28 operate based on the supply voltage value from the projection light processing unit 32.

  The color wheel 28 has a predetermined rotational position detected by a marker sensor 33 disposed close to the peripheral end surface, and the detection signal is input to the projection image processing unit 24.

  FIG. 3 shows a planar structure of the color wheel 28. In the color wheel 28, color filters called R (red), G (green), B (blue), and W (transparent) segments are divided and arranged on the same circumference at respective central angles of 90 °. In addition, an arc-shaped through hole is provided at the end corresponding to the R (red) segment near the W (transparent) segment on the outer peripheral side of the rim portion 28a, specifically, the predetermined rotational position of the outermost rim portion 28a. And a marker 28c at the same position as the marker 28b on the inner peripheral side of the rim portion 28a, and a G (green) segment near the R (red) segment on the inner peripheral side of the rim portion 28a. The marker 28d is at the end corresponding to, the marker 28e is at the end corresponding to the B (blue) segment near the G (green) segment on the inner periphery side of the rim portion 28a, and the inner periphery side of the rim portion 28a is also the same. B (blue) segment DOO side of the W marker 28f on the end corresponding to the segment of (transparent) is formed respectively, are rotated in the direction indicated by the arrow shown in the figure A.

  The marker sensor 33 is composed of, for example, two pairs of reflection type photo interrupters, and is disposed close to the rim portion 28a of the color wheel 28 so as to face the outer peripheral side of the rim portion 28a. In the pair of photo-interrupters installed in, the light emitted from the LEDs constituting the photo-interrupter is not reflected by the rim portion 28a only at the marker 28b portion, and the level of the output signal of the light receiving element is lowered. Thus, the position of the marker 28b, that is, the start position of the R (red) segment can be detected.

  Similarly, another pair of photo interrupters located on the inner peripheral side is the marker 28c to 28f, and the light emitted from the LED constituting the photo interrupter is not reflected by the rim portion 28a, and the light receiving element Therefore, the positions of the markers 28c to 28f, that is, the start positions of the R (red), G (green), B (blue), and W (transparent) segments can be detected. it can.

  The control unit 34 controls all the operations of the circuits. The control unit 34 includes a CPU, a non-volatile memory that stores an operation program executed by the CPU including processing of a projection operation and a photographing operation described later, a work memory, and the like.

  A process circuit 35, an image recording unit 36, and an audio processing unit 37 are also connected to the control unit 34 via a system bus SB.

  The process circuit 35 receives an output of a CCD 38 as an image pickup device that photoelectrically converts a light image that is behind the photographing optical axis of the photographing lens 13 and is formed by the photographing lens 13, and receives an analog image signal from the CCD 38. Is digitized, and after performing color process processing including pixel interpolation processing and γ correction processing, a digital luminance signal Y and color difference signals Cb, Cr are generated and output to the image conversion unit 23 via the system bus SB. To do.

  The image conversion unit 23 compresses the luminance and color difference signals by a process such as ADCT or Huffman coding, and writes the obtained image data into an image recording unit 36 that is mounted as a recording medium of the projector device 10. The image recording unit 36 is composed of, for example, a flash memory and stores image data obtained by photographing.

  The sound processing unit 37 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 16 to emit a loud sound, or generates a beep sound if necessary.

  Each key operation signal in the key switch (SW) unit 15 is directly input to the control unit 34, and a signal from the Ir receiving unit 39 is also directly input. The Ir receiving unit 39 includes the Ir receiving unit 14 and an Ir receiving unit provided on the back side of the main casing 11, converts the infrared light reception signal into a code signal, and sends the code signal to the control unit 34.

Next, the operation of the above embodiment will be described.
FIG. 4 mainly shows the contents of control by the control unit 34 when performing an operation of projecting an image input from an external device (not shown) connected to the input / output connector unit 21 when the power is turned on.

  Initially, the micromirror element 25 is driven to display based on an image signal input from the input / output connector unit 21, and color light from the light source lamp 27 is irradiated to the micromirror element 25 via the color wheel 28. Thus, a light image is formed, and projection processing for emitting from the projection lens 12 is executed (step M01).

  While executing this projection processing, the control unit 34 operates the “AF / AKS” key for instructing automatic focusing (AF) and automatic keystone correction (AKS) of the projected image simultaneously from the key switch unit 15 or the Ir receiving unit 39. It is repeatedly determined whether or not a signal has been input (step M02) and whether or not a shutter key operation signal for instructing photographing of a projected image has been input from the key switch unit 15 or the Ir receiving unit 39. Then, it waits for these key operations.

  FIG. 6 illustrates the timing of each unit related to the projection of an image and the projection of shooting the projected image. In the figure, it is assumed that the frame frequency of an input image signal is 60 [Hz], and one frame of each image is projected and displayed at a period of 1/60 [second].

  FIG. 6 (3) shows each segment of the color wheel 28 that is rotationally driven in synchronization with the input image signal and is inserted into the projection optical axis from the light source lamp 27.

  As the color wheel 28 rotates, a detection signal obtained from the marker sensor 33 in synchronization with the marker 28b arranged at the leading position of the R (red) segment of the color wheel 28 is as shown in FIG. In addition, a detection signal obtained from the marker sensor 33 in synchronization with the markers 28c to 28f arranged at the head positions of the R (red), G (green), B (blue), and W (transparent) segments. As shown in FIG.

  When an operation signal of the “AF / AKS” key is input from the key switch unit 15 or the Ir receiving unit 39 during the projection operation as described above, this is determined in step M02, and the photographing lens 13 is driven. A focus distance value is obtained from the lens position where the contrast value is highest (step M04), and an appropriate exposure value is obtained to obtain a shutter speed that is an integral multiple of one cycle of the image projection “1/60 [seconds]” ( S value) and the corresponding aperture value (A value) are determined (step M05).

  After that, it waits for the detection signal from the marker sensor 33 synchronized with the marker 28b shown in FIG. 6 (1) to be present (level falls) (step M06), and determines that the timing is reached. At this time, the projection position is photographed by controlling the lens position of the photographing lens 13 and the scanning drive time of the CCD 38 in accordance with the focus distance value, the S value, and the A value (step M07).

FIG. 5 is a subroutine showing the specific contents of this imaging process.
At the beginning of the process, a multiple N of how many times the shutter speed (S value) determined in step M05 corresponds to one cycle “1/60 [second]” of the image projection is set (step S01). ).

  In this case, for example, if the set shutter speed is “1/60 [second]”, N = 1, and if “1/30 [second]”, N = 2, etc., an integer corresponding to the shutter speed. N is set.

  Next, an initial value “1” is set to the variable n corresponding to the shutter speed (step S02), and the marker is synchronized with the marker 28c arranged at the head position of the R (red) segment of the color wheel 28. Within a sufficiently short time after obtaining the detection signal from the sensor 33 until obtaining the detection signal from the marker sensor 33 synchronized with the marker 28d arranged at the head position of the G (green) segment next time Based on the (red) segment, the micromirror element 25 performs exposure with red light and reading of the charge, and holds R image data in the internal buffer of the process circuit 35 (step S03).

  Here, when the R image data is already held in the internal buffer of the process circuit 35, that is, when the first multiple N is “2” or more and the same color component is subjected to multiple exposures, The R image data held so far and the newly obtained R image data are added and stored.

  Similarly, after obtaining a detection signal from the marker sensor 33 synchronized with the marker 28d arranged at the head position of the G (green) segment of the next color wheel 28, the head of the next B (blue) segment is obtained. Within a sufficiently short time until a detection signal from the marker sensor 33 synchronized with the marker 28e arranged at the position is obtained, the micromirror element 25 performs exposure with green light and its charge based on the G (green) segment. And the G image data is held in the internal buffer of the process circuit 35 (step S04).

  Similarly, after obtaining a detection signal from the marker sensor 33 synchronized with the marker 28e arranged at the head position of the B (blue) segment of the color wheel 28, the signal is then placed at the head position of the W (transparent) segment. In the sufficiently short time until the detection signal from the marker sensor 33 synchronized with the marker 28f is obtained, the micromirror element 25 performs exposure with blue light and reading of the charge based on the B (blue) segment. The B image data is held in the internal buffer of the process circuit 35 (step S05).

  Finally, after obtaining a detection signal from the marker sensor 33 synchronized with the marker 28f arranged at the leading position of the W (transparent) segment of the color wheel 28, the next position is at the leading position of the R (red) segment. In a sufficiently short time until a detection signal from the marker sensor 33 synchronized with the arranged markers 28b and 28c is obtained, non-colored input light (achromatic color) by the micromirror element 25 based on the W (transparent) segment. The luminance light is exposed and the charge is read out, and the luminance light image data is held in the internal buffer of the process circuit 35 (step S06).

Thereafter, it is determined whether or not the exposure for each color component is completed depending on whether or not the value of the variable n at that time is equal to the multiple N (step S07).
Here, when the value of the variable n is different from the multiple N (the value of the variable n is smaller than the multiple N), the value of the variable n is updated by “+1” (step S08), and then the processing from step S03 is performed again. Returning to the above, exposure, readout, and storage of image data are performed for each color component of the segment formed on the color wheel 28.

  In this way, the processing of steps S03 to S07 is repeated the number of times N. Thereafter, when it is determined in step S07 that the variable n is equal to the multiple N, the image data for each of the R, G, B, and W color components stored in the internal buffer of the process circuit 35 at that time is obtained by matrix calculation. A series of color process processing such as conversion into image data in YUV (luminance color difference) format is executed, and the obtained image data is written in the image recording unit 36 (step S09). This subroutine is completed, and FIG. Return to the main routine.

  In FIG. 4, a calculation for calculating the amount of distortion in each horizontal / vertical direction is performed by extracting the range of the projected image from the image data obtained by imaging and written in the image recording unit 36 (step M08). After executing the automatic focusing (AF) operation and the automatic keystone correction (AKS) operation to respond to the key operation based on the contents (step M09), the process returns to the processing from step M01 again to continue the projection operation. To do.

  Further, when a shutter key operation signal is input from the key switch unit 15 or the Ir receiver unit 39 as shown in FIG. 6 (4) during execution of the projection operation, this is determined in step M03, and the photographing lens 13 is moved. An in-focus distance value is obtained from the lens position where the contrast value is highest by driving (step M10), and an appropriate exposure value is obtained to obtain an integral multiple of one period “1/60 [second]” of the image projection. The shutter speed (S value) and the corresponding aperture value (A value) are determined (step M11).

  After that, the system waits for the detection signal from the marker sensor 33 by the marker 28b shown in FIG. 6 (1) to be present (level falls) (step M12). In accordance with the in-focus distance value, the S value, and the A value, the lens position of the taking lens 13 and the scan driving time of the CCD 38 are controlled to take a projected image (step M13).

  This imaging process is also as described in the subroutine of FIG. 6, and an image is captured for the number of times corresponding to the determined shutter speed (S value) for each color component of each segment constituting the color wheel 28.

  FIG. 6 (5) shows the photographing operation timing when the shutter speed is set to 1/60 [second]. Naturally, it coincides exactly with the rotational phase of the color wheel 28 shown in FIG. By exposing each color component, it can be seen that the projection image can be captured with the correct color balance as a result.

  FIG. 6 (6) shows the shooting operation timing when the shutter speed is set to 1/30 (= (1/60) × 2) [seconds]. In this case, as a matter of course, FIG. It can be seen that the projection phase can be photographed with the correct color balance as a result of performing exposure for each color component exactly in accordance with the rotational phase of the color wheel 28 shown in FIG.

  The image data photographed with the correct color balance is subjected to a color process in the process circuit 35, and then subjected to data compression processing in accordance with, for example, the JPEG standard in the image conversion unit 23 and recorded in the image recording unit 36. (Step M14), and then the process returns to Step M01 to prepare for the next shooting.

  In this way, by accurately detecting the rotation phase of the color wheel in the time division unit of each segment, it is synchronized with the time division timing for each color component of the projected image, and the shutter speed corresponding to the time division cycle. Can be used for shooting. For this reason, it is always possible to reliably shoot a projected image with a correct color balance, regardless of when execution of shooting is instructed.

  In addition, since the shutter speed, which is the exposure time for shooting, is appropriately adjusted as an integer multiple of the above time-division period, shooting can be performed in an appropriate exposure state corresponding to the brightness of the projected image. Can do.

  In the above projection system, a color wheel 28 is provided that divides and arranges a plurality of color filters on the same circumference as segments, and transmits light of a color component alternatively from white light from a light source by its rotational drive. Since the rotational phase of the color wheel 28 and the position of each segment are detected by, for example, a reflective fan interrupter, it can be applied to a DLP (registered trademark) projector that has been conventionally used. The projection of the color balance can be easily realized by accurately synchronizing with the rotation of the color wheel 28.

  Furthermore, as an image pickup device for capturing a projected image, for example, an image pickup device such as a monochrome CCD 38 without a color filter is used. This greatly simplifies the circuit configuration of the imaging system including the image sensor, and since there is no color filter on the image sensor side, the attenuation of incident light is minimized and the projection light is used effectively. And can shoot.

  Although the above embodiment has been described with respect to a case where the present invention is applied to a DLP (registered trademark) projector device, the present invention is not limited to this, for example, a field sequential type liquid crystal that drives a light source lamp of RGB three colors in a time-sharing manner. The projector can also obtain a similar detection signal from the drive control signal of the light source lamp, and execute the shooting of the projection image that coincides with the time division cycle.

  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.

  Further, the above embodiments include inventions at various stages, and various inventions can be extracted by appropriately combining a plurality of disclosed constituent elements. For example, even if some constituent elements are deleted from all the constituent elements shown in the embodiment, at least one of the problems described in the column of the problem to be solved by the invention can be solved, and described in the column of the effect of the invention. In a case where at least one of the obtained effects can be obtained, a configuration in which this configuration requirement is deleted can be extracted as an invention.

1 is a perspective view showing an external configuration of a projector apparatus according to an embodiment of the present invention. The block diagram which shows the function structure of the electronic circuit of the projector apparatus which concerns on the same embodiment. The top view which illustrates the specific structure of the color wheel which concerns on the embodiment. The flowchart which shows the processing content regarding imaging | photography of the projection image which concerns on the embodiment. 6 is a flowchart showing the contents of a subroutine of the photographing process in FIG. 4 according to the embodiment. The timing chart which shows the processing state of each part regarding imaging | photography of the picture image which concerns on the embodiment.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 10 ... Projector apparatus, 11 ... Main body casing, 12 ... Projection lens, 13 ... Shooting lens, 14 ... Ir receiving part, 15 ... Key switch part, 16 ... Speaker (SP), 21 ... Input / output connector part, 22 ... Input / output Interface (I / F), 23 ... Image conversion unit, 24 ... Projection image processing unit, 25 ... Micromirror element (SOM), 26 ... Reflector, 27 ... Light source lamp, 28 ... Color wheel, 28a ... Rim unit, 28b- 28f ... marker, 29 ... integrator, 30 ... mirror, 31 ... motor (M), 32 ..., projection light processing unit, 33 ... marker sensor, 34 ... control unit, 35 ... process circuit, 36 ... image recording unit, 37 ... Audio processing unit, 38... CCD, 39... Ir receiver, SB.

Claims (6)

Projecting means for projecting and displaying each image in a time-division manner for each of a plurality of color components for an input color image signal;
Instruction means for instructing photographing of an image projected and displayed by the projection means;
Photographing means for photographing an image projected and displayed by the projection means;
When photographing is instructed by the instructing means, photographing by the photographing means is performed for each of the plurality of color components in synchronization with each time division timing for each color component by the projection means and at a shutter speed corresponding to the time division period. A projection apparatus comprising: an imaging control unit to be executed.   The projection apparatus according to claim 1, wherein the shutter speed is an integral multiple of the time division period. The projection means includes a color wheel that divides a plurality of color filters on the same circumference and transmits light of a color component alternatively from white light from a light source by rotation of the color filter, and a rotation phase of the color wheel. And a detection mechanism for detecting
The projection apparatus according to claim 1, wherein the photographing control unit performs photographing in synchronization with time division timing for each color component in the projection unit based on a detection signal from the detection mechanism.   4. The projection apparatus according to claim 3, wherein the photographing means uses a monochrome image pickup element not provided with a color filter. A projection image photographing method in a projection apparatus provided with a projection unit that projects and displays each image for each of a plurality of color components in time division with respect to an input color image signal and a photographing unit that captures an image to be projected and displayed. There,
An instruction step for instructing the photographing of the image projected and displayed in this photographing step;
When shooting is instructed by this instruction instruction, shooting for each of the plurality of color components is performed by the shooting unit in synchronization with each time division timing for each color component in the projection unit and at a shutter speed corresponding to the time division cycle. A projection image capturing method comprising: an imaging control step to be executed. Executed by a computer incorporated in a projection apparatus provided with a projection unit that projects and displays each image in a time-division manner for a plurality of color components with respect to an input color image signal, and a photographing unit that captures an image to be projected and displayed A program to
An instruction step for instructing image shooting in this shooting step;
When shooting is instructed in this instruction step, shooting for each of a plurality of color components is performed by the shooting unit at a shutter speed corresponding to the time division cycle in synchronization with each time division timing for each color component in the projection unit. A program for causing a computer to execute an imaging control step to be executed.

Images