JPH07225428A - Image operating device - Google Patents

Abstract

PURPOSE:To provide an image operating device for executing an image operation by specifying an optional position on the image without giving an adverse effect to the quality of the image on a projecting surface. CONSTITUTION:When a white light is projected on a screen by a projector 100 in a preparatory stage, the projected light reflected by the screen is made incident on a position measuring device 300 and the central position of the projected area is measured. In an actual use stage, when a screen is indicated by a screen indicator, an indicating light reflected by the screen is detected by the position measuring device and a indicated position is measured. Then, when infrared ray indicating an image operation is emitted from the screen indicator, this signal is received by light receiving unit 400. A control device 500 analizes the indicated image operation based on the outputs of the position measuring device and the receiving unit and outputs image operation indication to an image operating means 130. Based on this indication, the image operating means executes the image operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image manipulating device for manipulating a projected image at the time of a presentation at a conference, a research presentation, etc., while pointing the projected image.

[0002]

2. Description of the Related Art At the time of presentations at conferences, research presentations, etc., a projection device such as an OHP (overhead projector) or video projector is used to assist the explanation by displaying a projected image on a screen or the like. Often When a simple projection device is used, the instructor holds a screen indicator such as a stick or a light emitting device in his hand and gives an instruction to an arbitrary portion on the image for explanation. However, when operating the OHP or the like at a position away from the screen while holding the screen indicator in one hand, the instructor moves from the position at the time of the explanation to the installation position of the OHP or the like, or the assistant is operated. I had to leave it to you. Therefore, when performing an image operation such as enlarging an output image without an assistant, the user returns to the side of the apparatus and operates, so that the explanation is interrupted and it is difficult to smoothly explain.

In view of this, various proposals have been made for the convenience of the explanation person. For example, a screen indicator provided with remote control means is disclosed in Japanese Patent Laid-Open No. 5-11.
No. 688 and Japanese Patent Laid-Open No. 4-371063 disclose a projector that displays a mark at a position designated by an instructor. Further, Japanese Patent Application Laid-Open No. 4-177232 discloses an OHP capable of operating a moving function of a projector by remote control and operating an image without returning to the side of the apparatus.

Although these are not devices for executing a desired image operation when an image operation signal is transmitted while instructing a screen, such an image operation device is disclosed in JP-A-4-324847 and JP-A-4-305687. There is a description. Both devices are required to detect the indicated position, but the device disclosed in Japanese Patent Laid-Open No. 4-324847 has a half mirror disposed between the screen and the light source, and the reflection from the screen separated by this half mirror. The light is measured to detect the indicated position. In addition, JP-A-4-305687
The device described in (1) detects the indicated position by measuring the distance between the screen and a device that receives image information of the screen.

[0005]

However, Japanese Patent Laid-Open No. 4-3.
Since the device of 24847 detects the indicated position using the half mirror, the amount of light directed to the screen is reduced, and the clarity of the image is likely to be impaired.

The device disclosed in Japanese Patent Laid-Open No. 4-3055687 is
Since it is necessary to provide the distance measuring means in the device, there is a problem that the structure of the device becomes complicated.

The present invention has been made in order to solve the above problems, and executes image operations while designating an arbitrary position on an image without adversely affecting the quality of the image on a projection surface such as a screen. An object of the present invention is to realize an image operation device that can be performed and has a simple structure.

[0008]

The image manipulating apparatus of the present invention comprises (a) projection means for projecting an original image on a projection surface;
(B) Image operating means for performing an image operation on the projection image projected on the projection surface according to an instruction from the outside, (c) Instruction means for emitting an instruction light for indicating an arbitrary position on the projection surface, and projection Position measuring means for measuring the center position of the image and measuring and outputting the position on the projection surface designated by the pointing light; (d) transmitting means for transmitting a signal designating an image operation; and (e) transmitting The image operation designated by the transmitting means is analyzed based on the receiving means for receiving the signal transmitted from the means, (f) the output of the position measuring means, and the output of the receiving means, and the image operation to the image operating means is performed. And a control means for outputting an instruction.

Here, the position measuring means measures the center position of the projection image by detecting the projection image and the pointing light reflected by the projection surface, and also measures the position on the projection surface designated by the pointing light. You may. Further, the position measuring means may include, for example, a two-dimensional semiconductor position detecting element that detects the projected image and the pointing light.

Further, the indicating means and the transmitting means may be integrated. Further, the signal transmitted by the transmitting means and designating the image operation may be, for example, a time-series signal coded by intensity modulation.

The image manipulating means moves the projected image based on the image manipulating instruction so that the position on the projected image designated by the pointing light is located at the center of the projected region, and then the center of the projected region is adjusted. Image operations may be performed centering on the position.

The original image projected on the projection surface is
The VTR image and the image displayed on the transparency are included. In addition to the image in which the original image is projected on the projection surface, the projected image also includes a white light image emitted from the projection unit without the original image being prepared.

Further, the image operation includes a two-dimensional operation such as enlargement, parallel movement, rotation, etc., which is executed on the image projected on the projection surface, a focus operation and the like.

[0014]

First, in the preparatory stage, the center position of the projected image is measured by the light of the projected image being incident on the position measuring means. For example, when the position measuring means includes a two-dimensional semiconductor position detecting element, for example, white light having a uniform intensity over the projection area is projected onto the projection surface by the projection means, and the projection image reflected by the projection surface is used as the semiconductor position. It is measured by the detection by the detection element. Here, since the position measuring means detects the projection image after being projected on the projection surface, all the light projected by the projection means on the original image reaches the projection surface, and the light amount of the projection image does not decrease.

Next, in the actual use stage, when an arbitrary position on the projection surface is designated by the pointing means, the position designated by the pointing light is measured by the position measuring means. This is done, for example, by distinguishing the intensity-modulated light as the pointing light from the projected image, while the position measuring means detects the pointing light reflected on the projection surface.

Since the position measuring means measures the center position of the projected image and the position on the projection surface pointed by the pointing light, the distance measuring means is omitted.

Next, when a signal for designating an image operation such as enlargement or reduction is transmitted from the transmitting means while indicating an arbitrary position on the projection surface, this signal is received by the receiving means. Here, if the instruction means and the transmission means are integrated, the operation is easy.

The control means analyzes the image operation designated by the transmitting means on the basis of the output of the position measuring means and the output of the receiving means, and outputs an image operation instruction to the image operating means. Based on this, the image operating means executes the specified image operation on the projected image.

For example, the control means calculates, from the output of the position measuring means, the amount of movement of the projection image that positions the position on the projection surface designated by the pointing light at the center of the projection area, and based on the output of the receiving means, An enlargement / reduction ratio or the like is calculated according to an image operation such as enlargement / reduction. Next, when an image operation instruction including these data is output to the image operation means, the image operation means moves the projection image to position the position designated by the instruction light at the center of the projection area, and then the projection area. Image operations such as enlargement and reduction are executed with the center position of the center as the center.

[0020]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. In the description of the drawings, the same elements will be denoted by the same reference symbols, without redundant description.

FIG. 1 is a diagram showing the configuration of an apparatus according to an embodiment of the present invention. This image operating device is a projector 100 that projects an image on a screen 600, and a screen instruction that emits a red laser beam to indicate an arbitrary position on the screen 600 and also transmits an infrared signal for designating an image operation. Mounted on the projector 200, the position measuring device 300 for measuring the center position of the image projected by the projector 100 and the position on the screen 600 designated by the red laser light, and transmitted from the screen indicator 200. The infrared receiving device 400 that receives the infrared operation designating signal, processes the outputs from the position measuring device 300 and the infrared receiving device 400, analyzes the operation designating signal, and gives an image operation instruction such as enlargement and focus of the projector 100. It is equipped with output.

Here, a transparency 900 which is an original image of a projected image is set in the projector 100, a light source 110 for projection, a projection lens system 120 for enlarging, reducing or focusing a screen image, and a control device. Transparency 90 based on 500 output
0 and a driving device 130 for driving the projection lens system 120.

Further, the screen indicator 200 is a laser light emitting device 210 for emitting a red laser beam for instruction.
And a remote control device 220 for transmitting an infrared signal for designating an image operation. In this embodiment, the laser light emitting device 210 and the remote control device 2 are provided for the convenience of operation.
Twenty integrated.

The position measuring device 300 includes a two-dimensional PSD (two-dimensional semiconductor position detecting element) 330 and a position measuring circuit 340.
And a red filter 310 that transmits only red light and an imaging lens 320 that are arranged on the optical path between the screen 600 and the PSD 330.

The image operating apparatus shown in FIG. 1 is a projector 1
00, the remote controller 220 is operated while instructing an arbitrary position of the projection image projected on the screen 600 using the screen indicator 200 to move the image so that the pointing light is positioned at the center of the projection image. After that, the image is enlarged, reduced, or focused around the designated position.

FIG. 2 is a view showing the operation surface of the remote control device 220. Here, the push button 221 is for inputting the central coordinates of the projected image, the push button 222 is for emitting the pointing light, the push buttons 223 and 224 are for enlarging and reducing the projected image, and the push buttons 225 and 226 are the focal points of the optical system of the apparatus. This is for focusing the projected image by changing the position.

First, in the preparation stage, the projection light source 110 is made to emit light in a state where the transparency 900 is not set. As a result, a white projected image with uniform intensity is formed. The light of the projection image reflected by the screen 600 passes through the red filter 310 and the imaging lens 320 and enters the PSD 330. In this way, a white projected image is formed on the PSD 330. The PSD 330 detects the position of the center of gravity of the incident light. In this case, since the intensity of the incident light is uniform, the center position of the incident projected image is detected.

PSD3 based on incidence of reflected light on projected image
The output current of 30 is input to the position measuring circuit 340, and the position measuring circuit 340 calculates the central coordinates of the reflection projection image incident on the PSD 330 from this output current.

The reflection projection image incident on the PSD 330 need not be white as long as the intensity is uniform. For example, a transparency uniformly colored in red is set and projected on the screen 600. It may be reflected light of the image.

FIG. 3 is a diagram showing the configuration of the position measuring circuit 340. When the reflected light 800 from the screen 600 of the projected image enters the two-dimensional PSD 330, the PSD
The reflected light 8 is emitted from four electrodes (not shown) included in 330.
A current having a magnitude determined corresponding to the position of the center of gravity of 00 is output. This output current is subjected to current-voltage conversion in the amplifier circuits 341 to 344, then branched, and input to the low pass filter 345 and the band pass filter 346.

DC (direct current) is applied to the reflected light 800 of the projected image.
Since only light components are included, filters 345, 3
The input to 46 is also only the DC component. The DC signal input to the bandpass filter 346 is blocked there, but the DC signal input to the lowpass filter 345 is
It passes through the filter 345 and is input to the position calculation circuit 347. The position calculation circuit 347 calculates and outputs the center coordinates of the screen 600 based on this input signal. The output center coordinate data signal reaches the input terminal 352 of the switch circuit 349.

Next, when the push button 221 of the remote control device 220 of FIG. 2 is pressed, an infrared signal encoding a center coordinate input command is transmitted from the remote control device 220, reflected by the screen 600 and received by the infrared receiving device 40.
It is incident on 0.

As shown in FIG. 3, the infrared receiver 4
00 includes an infrared receiver 410 and a decoder 420. Image operation designation signal 810 from remote control device 220
Is photoelectrically converted by the infrared receiver 410 and then input to the decoder 420. When the center coordinate input command is decoded by the decoder 420, various signals described later are sent to the control device 500.

The control device 500 includes a CPU 510 and a ROM
520 and RAM 530 are provided. FIG. 4 is a diagram illustrating a control system of the control device 500. When the center coordinate input command is decoded by the decoder 420, an interrupt signal is input through the interrupt line,
The CPU 510 is interrupted. After that, the CPU 510 reads the command signal through the bus line. Next, the switch circuit 349 of FIG. 3 is selected by the address line, and the output terminal 351 and the input terminal 35 of FIG. 3 are passed through the bus line from the CPU 510 to the switch circuit 349.
A command is sent to connect the two.

As a result, the central coordinate data of the reflection projection image is input to the A / D converter 350. The center coordinate data that has been A / D converted here is sent to the control device 500 and recorded by the RAM 530 of FIG.

Next, let us consider a case where an explanation is given using the image operating apparatus of FIG. In this case, the operator sets the transparency 900 and then projects the image on the screen 600 by the projector 100,
A description will be given while indicating an arbitrary position on the projected image by the red laser light from the screen indicator 200.

Here, when the push button 222 shown in FIG. 2 is pushed, the laser light for instruction which is modulated to 20 Hz is emitted from the laser emitting device 210. At the same time, the remote control device 220 transmits an infrared signal that encodes an instruction to switch the switching state of the switch circuit 349. After the push button 222 is pushed once, the laser beam continues to be emitted even if the hand is released. Again,
When the push button 222 is pressed, laser light is not emitted.

The emitted red indicating laser light is reflected by the screen 600, passes through the red filter 310 and the imaging lens 320 which block other than the red light, and PSD3.
It is incident on 30. In this way, an image of the reflection indicating light is formed on the PSD 330.

DC light of the reflected projection image is incident on the PSD 330 together with the above-described reflection indicating light which is 20 Hz modulated light. Therefore, the output current from the PSD 330 also includes the 20 Hz modulation component due to the reflection indicating light and the DC component due to the reflection projection image.

This output current corresponds to the amplifier circuit 341 of FIG.
˜344, the current-voltage conversion is performed, and then the low-pass filter 345 and the band-pass filter 34 are branched.
6 is input. The low-pass filter 345 blocks the 20 Hz modulated component of the input current. The bandpass filter 346 cuts off the DC component, but the frequency is 20 Hz.
Is included in the band, the 20 Hz modulation component passes. Therefore, the 20 Hz modulation component corresponding to the incident position of the reflection indicating light is input to the position calculation circuit 348.

The position calculation circuit 348 calculates the incident position of the indicator light incident on the PSD 330 based on this input signal and outputs it. The output position data signal reaches the input terminal 353 of the switch circuit 349.

On the other hand, the remote controller 220 together with the pointing light
The switching command signal transmitted from the screen 6
After being reflected and diffused at 00, the infrared receiver 410 of FIG.
Incident on. After that, when the instruction is decoded by the decoder 420 and an interrupt signal is input to the CPU 510 and an interrupt is issued, the CPU 5 passes through the bus line.
10 reads the instruction to calculate the designated position. The switch circuit 349 of FIG. 3 is selected by the address line, and the CPU 5
A command for connecting the output terminal 351 and the input terminal 353 of FIG. 3 is sent from 10 through the bus line.

As a result, the position data of the pointing light is A / D.
After being input to the converter 350 and A / D converted, FIG.
Of RAM 530 and recorded there. In this way, the central coordinate data of the reflection projection image and the incident position data of the reflection indicating light on the PSD 330 are recorded in the RAM 530.

Next, the operation of the image will be described. When performing the enlargement or reduction operation, first, while instructing an arbitrary position on the image using the screen indicator 200, the push button 223 or 2 of FIG. 2 is selected according to a desired operation.
Press 24. As a result, the remote control device 220 emits a diffused infrared ray that encodes an enlarged or reduced image operation. Here, one code of the infrared ray is repeated according to the pressing time.

The emitted infrared rays are reflected and diffused by the screen 600, and then enter the infrared receiver 410 shown in FIG. After that, the image operation corresponding to the incident infrared ray is decoded by the decoder 420, and the CPU 510 reads the image operation through an interrupt by an interrupt signal or the like.

When the CPU 510 reads an image operation,
Data of the center position of the reflection projection image and the incident position of the pointing light is read from the RAM 530. Then, based on this, the transparency 900 is set so that the pointing point by the pointing light is located on the center of the projected image on the screen 600.
A shift signal for moving the is transmitted to the drive device 130.
Further, the CPU 510 sends a drive command signal corresponding to the read image operation to the drive device 130, and causes the drive device 130 to execute the image operation of enlarging or reducing at a constant rate. Then, the same image operation is repeatedly executed according to the number of repeats proportional to the time when the button is pressed.

Specifically, the drive unit 130 moves the transparency 900 based on the shift signal,
After the designated point is located at the center of the projected image, the projection lens system 120 is repeatedly driven at a constant rate to perform a desired image operation for enlargement or reduction.

Thus, by pressing the push button of the remote control device 220 for a desired time while pointing an arbitrary position on the projected image with the pointing light, the pointing is performed at an enlargement or reduction ratio proportional to the pressed time. It is possible to perform image operations such as enlarging or reducing the projected image centering on the position.

On the other hand, when the focus operation of the image is executed, the push button 225 or 22 of the remote controller 220 is used.
Press and hold 6 for the desired time. In this case as well, diffused infrared rays that code the image operation are emitted, and the CPU 510 reads the image operation in the same manner as in the case of enlargement or the like.
However, the CPU 510 does not read the data of the center position of the reflection projection image and the incident position of the pointing light, and does not send the shift signal for moving the transparency 900. The CPU 510 outputs the drive command signal to the drive device 130.
To execute the focus operation at a constant rate. Then, the same focus operation is repeatedly executed according to the number of repeats proportional to the time when the button is pressed.

The drive mechanism of the apparatus of this embodiment will be described with reference to FIGS. Here, FIG. 5 is a block diagram showing a part of the configuration of the driving device 130, and FIG.
FIG. 3 is an overall configuration diagram for explaining a drive mechanism. Here, as an example of the projector 100, the OHP 101
It is shown.

As shown in FIG. 5, the drive unit 130
Is a drive circuit 141 to which a shift signal or a drive command signal is input from the CPU 510, motors 142 to 146 that rotate under the control of the drive circuit 141, and pinion gears 147 to 15 attached to the rotation shafts of these motors.
1 and. Further, in addition to this, stages 160 to 162 and rack gears 152 to 1 as shown in FIG.
54 and shafts 157-159.

As shown in FIG. 6, the transparency 900 is mounted on the X-axis stage 160 which is movable in the X-axis direction 163. This X-axis stage 160
Are mounted on a Y-axis stage 161 which is movable in the Y-axis direction 164, and the Y-axis stage 161 is a Z-axis stage 16 which is movable in the Z-axis direction (optical axis direction) 165.
It is installed on 2. The X-Z axis stage 160
˜162 so that light from a projection light source (not shown) installed below the Z-axis stage 162 is transmitted,
Made of translucent material.

Axis 1 is attached to the X-Z axis stages 160-162.
57 to 159 are attached to the shaft 157-1
Rack gears 152 to 154 that mesh with the pinion gears 147 to 149 are attached to the tip end of 59.

A projection lens system 121 is arranged above the transparency 900 in the OHP 101. Here, the projection lens system 121 incorporates a focus lens having a focusing function and a zoom lens having a zoom function. In addition, the projection lens system 1
Reference numeral 21 has a zoom ring gear 155 that works with the built-in zoom lens and a focus gear 156 that works with the focus lens. The zoom ring gear 155 and the focus gear 156 mesh with the pinion gears 150 and 151.

Above the projection lens system 121, the reflection plate 7 is provided.
00 is provided. As a result, the image of the transparency 900 generated by the light emitted from the projection light source is transmitted through the projection lens system 121, reflected by the reflector 700, and projected onto the screen 600.

When a shift signal or a drive command signal from the CPU 510 is input to the drive circuit 141, a control command for instructing the rotation direction and rotation amount of the motor is output to the motor 142-1.
46, the motors 142 to 146 rotate.
The rotation of the motors 142 to 146 is performed by the pinion gear 147 to
151.

When the shift signal from the CPU 510 is input to the drive circuit 141, the X-axis stage 160 and the Y-axis stage 161 move to move the transparency 900 on the XY plane. As a result, the point designated by the pointing light comes to be located at the center of the projected image.

Specifically, when the pinion gear 148 is rotated by the rotation of the motor 143 based on the shift signal and the driving force is transmitted to the rack gear 153, the Y-axis stage 1
61 moves along the Y-axis direction 164. With this,
The transparency 900 also moves in the Y-axis direction 164. As a result, the projected image moves horizontally on the surface of the screen 600. Similarly, due to the rotation of the motor 142, the X-axis stage 160 also moves along the X-axis direction 163, and the transparency 900 also moves along the X-axis direction 163, so that the image is vertically aligned on the surface of the screen 600. Moving. By combining such movements in the horizontal direction and the vertical direction, the position designated by the pointing light can be positioned at the center of the projected image.

Referring to FIG. 7, the X-axis stage 16
A method of calculating the amount of movement of the 0 and Y axis stages 161 will be described. Here, the point H is the position of the pointing light on the screen 600. The pointing light reflected by the screen 600 is directed to a point G on the PSD 330 by the imaging lens 320.
To form an image. On the other hand, the point H on the screen 600 corresponds to the point E on the transparency 900. When the center J of the screen 600 is designated by the screen indicator 200, the center J is imaged at the point I on the PSD 330.

Assuming that the magnification of the projection lens system 121 is M ₁ and the magnification of the imaging lens 320 is M ₂ , it is clear from FIG. 7 that X ₂ = M ₁ · X ₁ X ₂ = M ₂ · (X it is ₀ -X _3). From these equations, the point H indicating the position of the pointing light is
Corresponds to the following positions on the transparency 900.

X ₁ = (M ₂ / M ₁ ) · (X ₀ −X ₃ ) ... (1) Here, X ₁ is the distance measured from the center of the transparency 900 along the X direction.

Next, as shown in FIG. 8, the magnification M ₂ of the imaging lens 320 is expressed by the following equation.

M ₂ = b / X ₀ (2) Here, since b is a predetermined value determined at the stage of manufacturing the device, the magnification M _{1 of the} imaging lens 320 can be obtained from the equation (2).

In FIG. 8, since 1 / c + 1 / d = 1 / f (f is the focal length of the projection lens system 121) holds, the magnification M ₁ of the projection lens system 121 is expressed as follows.

M ₁ = d / c = (d−f) / f Furthermore, since b: d = X ₀ : a holds, M ₁ = (a · b−f · X ₀ ) / f · a · X ₀ (3) Here, a and b are predetermined values. In contrast,
f changes according to the drive amount of the zooming or focusing operation of the projection lens system 121. However, f can be read by the CPU 510 from a rotary encoder (not shown) attached to the projection lens system 121. Therefore, the magnification M ₁ of the projection lens system 121 can be obtained from the equation (3).

From the equations (1) to (3), the coordinate X of the designated position is calculated.
₁ is represented as follows.

X ₁ = b · f · (X ₀ −X ₃ ) / (a · b−f · X ₀ ) ... (4) Therefore, if the formula (4) is used, the center position X of the screen on the PSD 330 is calculated. The position coordinate X ₁ of the pointing light on the transparency 900 is found from ₀ and the position X ₃ of the pointing light. In this way, the CPU 510 calculates X ₁ and sends a shift signal corresponding to this to appropriately move the stage, so that the pointing point by the pointing light can be positioned at the center of the projected image.

Although the above description refers only to the one-way component of the two-dimensional coordinate (X-direction component), C
The PU 510 similarly calculates the position coordinates of the pointing light in the other directions orthogonal to the above direction.

When enlarging the image of the transparency 900, after the above stage movement, the motor 144 is rotated based on the drive command signal from the CPU 510.
The pinion gear 149 rotates, the driving force is transmitted to the rack gear 154, and the Z-axis stage 162 moves in the Z-axis direction 165.
And moves to the projection lens system 121 side. Further, the rotation of the motor 145 causes the pinion gear 150 to rotate,
This causes the zoom ring gear 155 to rotate, and a zoom lens (not shown) built in the projection lens system 121.
Is driven. In this way, the image on the screen 600 is enlarged. The image reduction operation is the same as the enlargement operation except that the rotation direction of the motor is opposite.

When the focus operation is performed on the image, the pinion gear 151 is rotated by the rotation of the motor 146 based on the drive command signal, and the focus gear 15 is accordingly rotated.
6 rotates. As a result, the focusing function of the focus lens operates and the focus of the image on the screen 600 is adjusted. The focus push button 22 shown in FIG.
5 and 226 are set so that the rotation directions of the focus gear 156 are opposite to each other. Therefore, it is possible to perform an appropriate focus operation by pressing these push buttons.

In the image manipulating apparatus of this embodiment, the PSD 330 serves as a position detector for the reflection projection image and the reflection pointing light.
Was used, but the present invention is not limited to this. For example, CC
The D projection element may be used to measure the incident position of the reflection projection image or the reflection indicating light.

Next, the second embodiment will be described. FIG. 9 is a diagram showing the configuration of the apparatus of this embodiment. This image operating device projects an image using a video projector 180 instead of the OHP used in the first embodiment. Other components are basically the same as those in the first embodiment.

Here, the video projector 180 is
A VTR 181 that outputs an original image, a switch 182 that switches the output direction of the VTR 181, and a frame memory 1 that is connected to one output terminal 187 of the switch 182.
83 and the frame memory 183, and the VTR1
The video operation unit 184 for enlarging, reducing, or moving the video from the V. 81 and the VTR 1 connected to the video operation unit 184.
The projector 185 that projects the image from the screen 81 onto the screen 600.

FIG. 10 shows the screen indicator 2 of this embodiment.
10 is a diagram showing an operation surface of a remote control device 220 included in 00. FIG. Here, the push button 221 is for inputting the center coordinates of the video screen 610 projected on the screen 600, the push button 222 is for emitting pointing light and pointing position, and the push buttons 223 and 224 are for enlarging and reducing the video screen 610. It is for.

In this device, in order to obtain the center position of the image screen 610, the VTR 181 outputs a white image of uniform intensity and the push button 221 of the remote control device 220 is pushed. As a result, the input terminal 186 and the output terminal 188 of the switch 182 are connected, and the white video signal from the VTR 181 is input to the projector 185. Then, the projector 185 projects the video screen 610 on the screen 600.

White image light is reflected by the screen 600 and enters the PSD 330 to form an image of the image screen 610. Similar to the first embodiment, the position measuring circuit 340 calculates the center coordinates of the reflection image screen 610 in the PSD 330 and records it in the RAM 530 included in the control device 500.

Next, when the VTR 181 outputs the image used for the explanation, this image output is the projector 185.
And is projected onto the screen 600. In addition,
This video output is modulated to 30 Hz.

When the push button 222 is pushed, the laser light emitting device 210 emits the indicating light. When this is used to point to an arbitrary portion of the video screen 610, the pointing light modulated at 20 Hz is reflected by the screen 600 and imaged on the PSD 330 together with the video light modulated at 30 Hz.

The output of PSD 330 is then sent to position measurement circuit 340. This output has a reflection video screen 6
20 by output signal of 30Hz by 10 and reflected indicator light
Hz output signals are mixed. However, similar to the first embodiment, the two are distinguished by the two filters included in the position measuring circuit 340, and the incident position of the reflection indicating light is calculated based only on the output signal of the reflection indicating light. The calculated incident position data of the pointing light is recorded in the RAM 530.

Next, the push button 223 or 224 is pushed while pointing the video screen 610. Button 223 or 2
When 24 is pressed, diffusive infrared rays, which encodes an operation command for enlarging or reducing an image, are transmitted. Similar to the first embodiment, this infrared ray repeats one code according to the pressing time.

The emitted infrared rays are reflected and diffused by the screen 600 and then received by the infrared receiver 400. After that, the operation command is decoded by the decoder 420, and through an interrupt or the like, the CPU 510 included in the control device 500 reads the designated image operation or the number of code repeats, as in the first embodiment.

When the CPU 510 reads the image operation, the input terminal 186 and the output terminal 187 of the switch 182 are connected. As a result, the video output from the VTR 181 is input to the frame memory 183, and the output from the frame memory 183 is input to the video operating unit 184.

On the other hand, the CPU 510 has the image screen 610.
The data of the center coordinates and the designated position of the image is read from the RAM 530, and the amount of movement of the image required to position the designated point by the pointing light at the center of the image screen 610 is calculated based on this data. The shift signal including this movement amount data is C
When the image is sent from the PU 510 to the video operating unit 184, the video operating unit 184 moves the video and moves the pointing point to the video screen 6
Located at the center of 10.

Further, CPU 510 calculates the enlargement or reduction ratio based on the enlargement or reduction operation command signal and the number of code repeats, and sends the operation signal based on this to the video operation unit 184. Based on this, the video operation unit 184
Expands or reduces the image output from the frame memory 183 around the designated position. Then, the enlarged or reduced image is displayed on the screen 600 by the projector 185. Thus, the video screen 61
An operation such as enlargement centering on the designated position of 0 is executed.

[0085]

According to the image operating apparatus of the present invention, the position measuring means measures the center position of the projected image and the position on the projection surface designated by the pointing light. Further, the signal for designating the image operation transmitted from the transmitting means is received by the receiving means. The control means analyzes the designated image operation based on the outputs of the position measuring means and the receiving means, and outputs an image operation instruction to the image operating means. Based on this, the image operating means executes the specified image operation on the projected image.

Therefore, the desired image operation can be performed on the projected image by operating the transmitting means while pointing the arbitrary position on the projection surface using the pointing means.
It is possible to easily give a lecture using projection means without an assistant.

Here, if the instruction means and the transmission means are integrated, the image operation becomes easier.

The position measuring means detects the image projected on the projection surface. Therefore, the light quantity of the projected image does not decrease, and the image quality is not adversely affected. Further, since the center position of the projected image and the position on the projection surface designated by the pointing light are measured by the position measuring means, the device having a simple structure without the distance measuring means can be obtained.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of an apparatus according to a first exemplary embodiment.

FIG. 2 is a diagram showing an operation surface of the remote control device according to the first embodiment.

FIG. 3 is a diagram showing a configuration of a position measuring circuit.

FIG. 4 is a diagram illustrating a control system of a control device.

FIG. 5 is a block diagram showing a part of a configuration of a drive device.

FIG. 6 is an overall configuration diagram for explaining a drive mechanism.

FIG. 7 is a first diagram illustrating a stage movement amount calculation method.

FIG. 8 is a second diagram illustrating a stage movement amount calculation method.

FIG. 9 is a diagram showing a configuration of an apparatus according to a second exemplary embodiment.

FIG. 10 is a diagram showing an operation surface of a remote control device according to a second embodiment.

[Explanation of symbols]

100 ... Projector, 110 ... Projection light source, 12
0, 121 ... Projection lens system, 130 ... Driving device, 200
... screen indicator, 210 ... laser emitting device, 22
0 ... Remote control device, 300 ... Position measuring device, 310 ... Red filter, 320 ... Imaging lens, 330 ... PSD,
340 ... Position measuring circuit, 400 ... Infrared receiver, 41
0 ... Infrared receiver, 420 ... Decoder, 500 ... Control device, 600 ... Screen, 900 ... Transparency.

Claims (6)

[Claims] 1. A projection means for projecting an original image on a projection surface, an image operation means for performing an image operation on a projection image projected on the projection surface according to an instruction from the outside, and an arbitrary operation on the projection surface. Pointing means for emitting pointing light for pointing a position, position measuring means for measuring the center position of the projection image and measuring and outputting the position on the projection surface pointed by the pointing light, and the image operation A transmitting unit that transmits a signal that specifies the transmitting unit, a receiving unit that receives the signal transmitted from the transmitting unit, an output of the position measuring unit, and an output of the receiving unit. An image operation device comprising: a control unit that analyzes the image operation performed and outputs an image operation instruction to the image operation unit. 2. The position measuring means measures the center position of the projection image by detecting the projection image and the pointing light reflected on the projection surface, and the projection indicated by the pointing light. The image operating device according to claim 1, wherein a position on the surface is measured. 3. The image operating device according to claim 1, wherein the position measuring means includes a two-dimensional semiconductor position detecting element that detects the projected image and the pointing light. 4. The image operating device according to claim 1, wherein the instructing unit and the transmitting unit are integrated. 5. The image operating device according to claim 1, wherein the signal transmitted by the transmitting unit and designating the image operation is a time-series signal coded by intensity modulation. 6. The image operating means moves the projection image based on the image operation instruction to position the position on the projection image designated by the pointing light at the center of the projection area, and thereafter, The image operating apparatus according to claim 1, wherein the image operation is executed with a center position of a projection area as a center.