JP2021069083A - Control method of display system, display system, and imaging device - Google Patents

Abstract

To shorten a time required for AF processing.SOLUTION: In a control method of a display system 1 including a document camera 100 and a projector 200 communicatively connected to the document camera 100, the document camera 100 performs imaging processing at a first frame rate FR1 when an autofocus operation is not executed, and performs imaging processing at a second frame rate FR2 larger than the first frame rate FR1 when the autofocus operation is executed.SELECTED DRAWING: Figure 3

Description

The present invention relates to a display system control method, a display system, and an imaging device.

Patent Document 1 describes an imaging means that images a subject image formed by an imaging optical system and outputs an imaging signal, and a projection optical system that generates an image and faces in the direction opposite to that of the imaging optical system. A projection means for projecting, a communication means for exchanging signals with a predetermined communication terminal, and a control means for performing video conference control between the communication terminal via the communication means are provided, and the control means is output by the image pickup means. By controlling the communication means so that the image pickup signal is transmitted to the communication terminal and controlling the projection means so that the image based on the image signal from the communication terminal received by the communication means is projected by the projection optical system, the video A camera that controls the conference is disclosed.

Japanese Unexamined Patent Publication No. 2013-251617

In the camera described in Patent Document 1, when the autofocus (AF) function is executed, a plurality of image data taken by changing the focus are used, so that the time required to execute the AF process is the frame rate at the time of shooting. Dependent. On the other hand, in a system in which an image taken by a camera is transmitted to a display device and displayed, the frame rate of the camera is determined based on the communication speed with the display device, the resolution of the image, and the like. Therefore, for example, when the resolution of the image is high, the frame rate may be low. Further, when the frame rate is low, the time required to execute the AF process may be long.

One aspect of solving the above problems is a control method of a display system including an image pickup device and a display device communicably connected to the image pickup device, and the image pickup device does not execute an autofocus operation. In this case, the image pickup process is executed at the first frame rate, and when the autofocus operation is executed, the image pickup process is executed at a second frame rate higher than the first frame rate, which is a control method of the display system. Is.

In the control method of the display system, when the image pickup device is connected, the display device determines the frame rate in communication with the image pickup device to the first frame rate, and sets the first frame rate. A configuration may be provided in which the indicated information is transmitted to the image pickup apparatus.

In the control method of the display system, the imaging device generates a first-resolution captured image when the autofocus operation is not executed, and when the autofocus operation is executed, the first resolution is generated. A configuration may be provided for generating a captured image having a second resolution lower than the resolution.

In the control method of the display system, the captured image of the second resolution may have a configuration corresponding to the image of the central portion of the captured image of the first resolution.

In the control method of the display system, the imaging device generates an image captured by the first compression rate when the autofocus operation is not executed, and when the autofocus operation is executed, the first image is generated. A configuration may be provided for generating an captured image having a second compression rate higher than one compression rate.

In the control method of the display system, when the imaging device does not execute the autofocus operation, it transmits captured image data to the display device, and when the autofocus operation is executed, the image pickup device transmits the captured image data. The display device may be configured to transmit image data indicating that the autofocus operation is being executed.

In the control method of the display system, when the image pickup device executes the autofocus operation, it transmits execution information indicating that the autofocus operation is being executed to the display device. The display device may be configured to display an image indicating that the autofocus operation is being executed when the execution information is received.

In the control method of the display system, the imaging device may be configured to execute the autofocus operation based on an operation by the user.

Another aspect of solving the above problems is a display system including an image pickup device and a display device communicably connected to the image pickup device, in which the image pickup device does not perform an autofocus operation. In the first frame rate, the image pickup process is executed at the first frame rate, and when the autofocus operation is executed, the image pickup process is executed at a second frame rate higher than the first frame rate. This is a display system that displays the captured image generated by the imaging device when the imaging device does not perform the autofocus operation.

Yet another aspect of solving the above-mentioned problems is an imaging device including a control unit and communicably connected to the display device, and the control unit is the first when the autofocus operation is not executed. When the image pickup process is executed at a frame rate and the autofocus operation is executed, the image pickup device executes the image pickup process at a second frame rate higher than the first frame rate.

The figure which shows an example of the structure of the display system which concerns on embodiment of this invention. The figure which shows an example of the structure of a projector. The figure which shows an example of the structure of a document camera. The flowchart which shows an example of the processing of the 1st control part in 1st Embodiment. The flowchart which shows an example of the processing of the 2nd control part in 1st Embodiment. The flowchart which shows an example of the processing of the 1st control part in 2nd Embodiment. The figure which shows an example of the 1st resolution captured image and the 2nd resolution captured image. The flowchart which shows an example of the processing of the 1st control part in 3rd Embodiment. A graph showing an example of the relationship between the frame rate and the autofocus time.

Hereinafter, embodiments will be described with reference to the drawings.

[1. Display system configuration]
FIG. 1 is a diagram showing an example of the configuration of the display system 1 according to the embodiment of the present invention.
The display system 1 includes a document camera 100 and a projector 200.
The document camera 100 is communicably connected to the projector 200 and transmits image data to the projector 200.
The "embodiment of the present invention" includes the first embodiment, the second embodiment, and the third embodiment, which will be described later with reference to FIGS. 4 to 8.

The projector 200 receives image data from the document camera 100 and displays an image corresponding to the received image data on the screen SC.
Although FIG. 1 illustrates an example of floor-standing installation in which the projector 200 is placed on the floor in front of the screen SC, the projector 200 may be suspended from the ceiling and installed. In the embodiment of the present invention, the case where the projector 200 projects onto a flat screen SC is illustrated, but the projection target is not limited to the screen SC, but may be a flat surface such as a wall surface of a building, and may be a curved surface or an uneven surface. You may.

The document camera 100 is connected to the projector 200 via USB by a USB cable 109.
The document camera 100 includes a base 102, a mounting surface 104, an arm 106, a camera head 108, and an operation panel 110. The base 102 is a flat plate-shaped base that supports the camera head 108, and the upper surface of the base 102 is a mounting surface 104 on which the subject TG is placed.
The subject TG is, for example, a sheet such as paper on which characters or pictures are drawn, a bound book, or the like, but the size or shape is not limited as long as it can be placed on the mounting surface 104.

The arm 106 is erected on the base 102, and the camera head 108 is fixed to the tip of the arm 106. The arm 106 may be fixed to the base 102, or the connecting portion connecting the arm 106 and the base 102 is provided with a rotating mechanism, and the arm 106 can be folded toward the base 102 by this rotating mechanism. It may be configured.
The camera head 108 includes an imaging unit 190 that is supported by the arm 106 and faces the mounting surface 104. The imaging unit 190 images the subject TG mounted on the mounting surface 104. The imaging unit 190 will be described in detail later with reference to FIG.

The operation panel 110 is provided on, for example, the upper surface of the base 102. The operation panel 110 includes a plurality of button switches operated by the user, and inputs an operation command to the document camera 100 by the user.
The document camera 100 receives a user's operation by the operation panel 110, images the subject TG by the image pickup unit 190 in response to this operation, and outputs image data based on the captured image to the projector 200.
The imaging unit 190 will be described in detail later with reference to FIG.

[2. Projector configuration]
FIG. 2 is a diagram showing an example of the configuration of the projector 200.
The projector 200 corresponds to an example of a “display device”.
The projector 200 includes a projection unit 210 and a drive unit 220 that drives the projection unit 210. The projection unit 210 forms an optical image and projects the image on the screen SC.
The projection unit 210 includes a light source unit 211, an optical modulation device 212, and a projection optical system 213. The drive unit 220 includes a light source drive unit 221 and an optical modulation device drive unit 222.

The light source unit 211 includes a lamp such as a halogen lamp, a xenon lamp, or an ultra-high pressure mercury lamp, or a solid-state light source such as an LED (Light Emitting Mode) or a laser light source.
Further, the light source unit 211 may include a reflector that guides the light emitted by the light source to the light modulation device 212, and an auxiliary reflector. Further, the light source unit 211 may be provided with a lens group for enhancing the optical characteristics of the projected light, a polarizing plate, or a dimming element for reducing the amount of light emitted by the light source on the path leading to the light modulation device 212. Good.
The light source driving unit 221 is connected to the second internal bus 207, and turns on and off the light source of the light source unit 211 according to the instruction of the second control unit 250 also connected to the second internal bus 207.

The optical modulation device 212 includes, for example, three liquid crystal panels 215 corresponding to the three primary colors of R, G, and B. R indicates red, G indicates green, and B indicates blue. That is, the optical modulation device 212 includes a liquid crystal panel 215 corresponding to R color light, a liquid crystal panel 215 corresponding to G color light, and a liquid crystal panel 215 corresponding to B color light.
The light emitted by the light source unit 211 is separated into three colored colors of RGB and incident on the corresponding liquid crystal panel 215. Each of the three liquid crystal panels 215 is a transmissive liquid crystal panel, and modulates the transmitted light to generate an image light PL. The image light PL modulated through each liquid crystal panel 215 is synthesized by a synthetic optical system such as a cross dichroic prism and emitted to the projection optical system 213.
In the embodiment of the present invention, the case where the light modulation device 212 includes the transmissive liquid crystal panel 215 as the light modulation element will be described, but the embodiment of the present invention is not limited to this. The light modulation element may be a reflective liquid crystal panel or a digital micromirror device.

The optical modulation device 212 is driven by the optical modulation device drive unit 222. The optical modulator drive unit 222 is connected to the second image processing unit 245.
Image data corresponding to each of the primary colors R, G, and B is input from the second image processing unit 245 to the optical modulator drive unit 222. The optical modulator driving unit 222 converts the input image data into a data signal suitable for the operation of the liquid crystal panel 215. The optical modulation device drive unit 222 applies a voltage to each pixel of each liquid crystal panel 215 based on the converted data signal, and draws an image on each liquid crystal panel 215.

The projection optical system 213 includes a lens, a mirror, and the like for forming an image of the incident image light PL on the screen SC. Further, the projection optical system 213 may include a zoom mechanism for enlarging or reducing the image projected on the screen SC, a focus adjustment mechanism for adjusting the focus, and the like.

The projector 200 further includes a second operation unit 231, a remote control light receiving unit 233, an input interface 235, a second storage unit 237, an image interface 241, a frame memory 243, a second image processing unit 245, and a second control unit 250. The input interface 235, the second storage unit 237, the image interface 241, the second image processing unit 245, and the second control unit 250 are connected to each other via the second internal bus 207 so as to be capable of data communication with each other.

The second operation unit 231 includes various buttons and switches provided on the surface of the housing of the projector 200, generates operation signals corresponding to the operations of these buttons and switches, and outputs the operation signals to the input interface 235. The input interface 235 is a circuit that outputs an operation signal input from the second operation unit 231 to the second control unit 250.

The remote control light receiving unit 233 receives an infrared signal transmitted from the remote control 5, decodes the received infrared signal, and generates an operation signal. The remote control light receiving unit 233 outputs the generated operation signal to the input interface 235. The input interface 235 outputs the operation signal input from the remote control light receiving unit 233 to the second control unit 250.

The second storage unit 237 is, for example, a non-volatile storage device such as a hard disk drive or an SSD (Solid State Drive). The second storage unit 237 stores a program executed by the second control unit 250, data processed by the second control unit 250, image data, and the like.

The image interface 241 includes a connector and an interface circuit, and is configured to be wire-connectable to a document camera 100 that supplies image data to the projector 200. In the embodiment of the present invention, the image interface 241 is, for example, an interface circuit for exchanging image data and the like with the document camera 100 in accordance with the USB (Universal Serial Bus) standard.

The second control unit 250 includes a second memory 251 and a second processor 253.
The second memory 251 is a storage device that non-volatilely stores programs and data executed by the second processor 253. The second memory 251 is composed of a magnetic storage device, a semiconductor storage element such as a flash ROM (Read Only Memory), or another type of non-volatile storage device. Further, the second memory 251 may include a RAM (Random Access Memory) constituting the work area of the second processor 253. The second memory 251 stores data processed by the second control unit 250, a second control program executed by the second processor 253, and specific image data.
The specific image corresponding to the specific image data indicates that the document camera 100 is executing the AF process.

The second control unit 250 controls the operation of each unit of the projector 200 by executing the second control program by the second processor 253.
For example, when the document camera 100 is connected to the image interface 241, the second control unit 250 determines the frame rate FR in the communication with the document camera 100 to be the first frame rate FR1 and the first frame rate FR1. Information indicating the above is transmitted to the document camera 100.
The document camera 100 receives the information indicating the first frame rate FR1, captures an image at the first frame rate FR1, and transmits the captured image data to the projector 200 at the first frame rate FR1.
The first frame rate FR1 indicates a frame rate FR in communication between the document camera 100 and the projector 200. That is, the first frame rate FR1 indicates a frame rate FR for transmitting captured image data from the document camera 100 to the projector 200.
The first frame rate FR1 is determined by the second control unit 250 based on the transmission speed of the USB cable 109, the resolution of the captured image, the processing speed of the first processor 120A, the processing speed of the second processor 253, and the like.
The first frame rate FR1 is, for example, 10 fps.

The second processor 253 may be configured by a single processor, or a plurality of processors may function as the second processor 253. The second processor 253 executes the second control program to control each part of the projector 200. For example, the second processor 253 outputs an image processing execution instruction corresponding to the operation received by the second operation unit 231 or the remote controller 5 and parameters used for the image processing to the second image processing unit 245. The parameters include, for example, geometric correction parameters for correcting the geometric distortion of the image projected on the screen SC. Further, the second processor 253 controls the light source driving unit 221 to control the lighting and extinguishing of the light source unit 211, and also adjusts the brightness of the light source unit 211.

The second image processing unit 245 and the frame memory 243 can be configured by, for example, an integrated circuit. The integrated circuit includes an LSI, an ASIC (Application Specific Integrated Circuit), and a PLD (Programmable Logic Device). PLD includes, for example, FPGA (Field-Programmable Gate Array). Further, an analog circuit may be included as a part of the configuration of the integrated circuit, or a combination of a processor and an integrated circuit may be used. The combination of a processor and an integrated circuit is called a microcontroller (MCU), a SoC (System-on-a-chip), a system LSI, a chipset, or the like.

The second image processing unit 245 expands the image data input from the image interface 241 into the frame memory 243. The frame memory 243 includes a plurality of banks. Each bank has a storage capacity capable of writing one frame of image data. The frame memory 243 is composed of, for example, an SDRAM (Synchrous Dynamic Random Access Memory).

The second image processing unit 245 performs, for example, resolution conversion processing or resizing processing, distortion correction, shape correction processing, digital zoom processing, adjustment of image hue and brightness, etc., on the image data expanded in the frame memory 243. Perform image processing.
In addition, the second image processing unit 245 generates a vertical synchronization signal obtained by converting the input frame frequency of the vertical synchronization signal into a drawing frequency. The generated vertical sync signal is called an output sync signal. The second image processing unit 245 outputs the generated output synchronization signal to the optical modulation device driving unit 222.

[3. Document camera configuration]
FIG. 3 is a diagram showing an example of the configuration of the document camera 100.
The document camera 100 includes a first control unit 120, a first storage unit 130, a first operation unit 140, a USB interface (USB I / F) unit 160, a light source 151, a light source control unit 150, a first image processing unit 170, and a resolution. It includes a conversion unit 180 and an imaging unit 190. The bus 128 connects the first control unit 120 and each unit of the document camera 100 so as to be communicable. Each unit of the document camera 100 includes a first storage unit 130, a first operation unit 140, a USB interface unit 160, a light source control unit 150, a first image processing unit 170, and a resolution conversion unit 180.
The document camera 100 corresponds to an example of an "imaging device".

The first control unit 120 includes a first processor 120A and a first memory 120B, and controls each unit of the document camera 100.
The first memory 120B is a storage device that non-volatilely stores programs and data executed by the first processor 120A. The first memory 120B is composed of a magnetic storage device, a semiconductor storage element such as a flash ROM, or another type of non-volatile storage device. Further, the first memory 120B may include RAM constituting the work area of the first processor 120A. The first memory 120B stores the data processed by the first control unit 120 and the first control program executed by the first processor 120A.
The first storage unit 130 stores various programs executed by the first control unit 120 and data processed by the first control unit 120. For example, the first storage unit 130 stores a USB module, a USB class driver, a program for controlling the image pickup unit 190, and the like.
The first control unit 120 corresponds to an example of the “control unit”.

The first processor 120A may be configured by a single processor, or a plurality of processors may function as the first processor 120A. The first processor 120A executes the first control program to control each part of the document camera 100. For example, the first processor 120A transmits image data indicating an image captured by the imaging unit 190 to the projector 200 via the USB interface unit 160.

The USB interface unit 160 is an interface circuit for exchanging control data, image data, and the like with an external device in accordance with the USB standard. In the embodiment of the present invention, the USB interface unit 160 is connected to the image interface 241 of the projector 200.

The light source 151 is an LED light source that irradiates the subject TG with light, and is arranged at the camera head 108 shown in FIG. The light source 151 is configured so that the color temperature of the emitted light can be adjusted. Further, the light source 151 is configured so that the amount of emitted light can be adjusted.
The light source control unit 150 controls the lighting and extinguishing of the light source 151 according to the instructions of the first control unit 120. Further, the light source control unit 150 adjusts the color temperature of the light emitted by the light source 151 according to the instruction of the first control unit 120. Further, the light source control unit 150 adjusts the amount of light emitted by the light source 151 according to the instruction of the first control unit 120.
In the embodiment of the present invention, the case where the light source 151 is an LED light source will be described, but the light source 151 may be a solid light source such as a laser light source, or a lamp light source such as a halogen lamp, a xenon lamp, or an ultrahigh pressure mercury lamp.

The image pickup unit 190 includes an image pickup lens 191 and an image pickup element 192 composed of a CCD (Charge Coupled Device), a CMOS (Complementary MOS), or the like. The image pickup lens 191 is composed of a lens or a lens group, and constitutes an optical system for photographing a subject TG. The image pickup lens 191 is housed in a tubular lens barrel 193 and can move along the optical axis AX.

The imaging unit 190 includes a lens operating unit 198 that moves the imaging lens 191 along the optical axis AX. The lens operating unit 198 moves each lens housed in the lens barrel 193 in the optical axis AX direction integrally with the lens barrel 193.
In the embodiment of the present invention, the lens operating unit 198 has a motor 194 and a gear 199 that transmits the rotational force of the motor 194 to the lens barrel 193. Further, the lens barrel 193 has, for example, a cylindrical shape, and has a configuration in which the distance between the lens barrel 193 and the image sensor 192 changes by rotating the lens barrel 193 in the circumferential direction about the optical axis AX. .. Therefore, by driving the motor 194, the lens barrel 193 connected via the gear 199 rotates, and the distance between the image pickup lens 191 and the image pickup element 192 can be changed. Further, the moving directions of the lens barrel 193 are opposite when the motor 194 is rotated in the forward direction and when the motor 194 is rotated in the opposite direction. Therefore, the moving direction of the lens barrel 193 is determined by the rotation direction of the motor 194.

The image pickup unit 190 includes an output circuit 195 that detects a signal from the image pickup element 192, generates captured image data, and outputs the captured image data to the first image processing unit 170.

The first image processing unit 170 is connected to the image pickup unit 190 and drives the image pickup unit 190 according to the control data input from the first control unit 120. The first image processing unit 170 outputs a drive signal to the lens operating unit 198 to operate the motor 194, thereby moving the lens barrel 193. Further, the first image processing unit 170 executes image processing such as converting the captured image data output by the output circuit 195 into a form of image data that can be processed by the first control unit 120, and converts the processed data into a form of image data that can be processed. Output to the first control unit 120.

The control data input from the first control unit 120 to the first image processing unit 170 can be, for example, control data instructing execution of focus adjustment and control data in which the optical zoom magnification is specified. In this case, the first image processing unit 170 moves the image pickup lens 191 according to the designated optical zoom magnification when the control data for specifying the optical zoom magnification is input from the first control unit 120. A drive signal is output to the lens operating unit 198. Further, the first image processing unit 170 determines the focusing state based on the captured image data output by the output circuit 195 when the control data instructing the execution of the focus adjustment is input from the first control unit 120. , The drive signal is output to the lens operating unit 198. For example, the first image processing unit 170 performs image processing such as edge detection and contrast measurement on the captured image data to determine the in-focus state. Then, the first image processing unit 170 moves the image pickup lens 191 by the lens operating unit 198, and identifies the optimum position of the image pickup lens 191 based on the change in the focusing state of the image pickup image data accompanying the movement of the image pickup lens 191. To do.

The resolution conversion unit 180 performs a process of converting the resolution of the captured image output by the first image processing unit 170 to a resolution designated by the first control unit 120. The first control unit 120 determines, for example, the resolution of the captured image output from the document camera 100 to the projector 200 based on the control data input from the projector 200 via the USB interface unit 160, and converts the image to this resolution. Let the resolution conversion unit 180 execute the data.

The first operation unit 140 detects an operation on the operation panel 110 shown in FIG. 1 and outputs data indicating the operation content to the first control unit 120. Specifically, the first operation unit 140 detects an operation indicating that the autofocus (AF) process is executed from the user, and outputs data indicating the operation content to the first control unit 120. The autofocus process executed based on the operation from the user corresponds to the so-called "one-shot AF".
The autofocus process according to the embodiment of the present invention is an autofocus process executed based on an operation from the user.

In the embodiment of the present invention, the first control unit 120 transmits the image data to the projector 200 via the USB interface unit 160, but the embodiment of the present invention is not limited to this. The interface for connecting to the projector 200 may be an analog interface such as VGA (Video Graphics Array) or a D terminal or an S terminal. Further, the interface for connecting to the projector 200 may be, for example, a digital interface such as DVI (Digital Visual Interface), HDMI (registered trademark: High-Definition Multimedia Interface), DisplayPort, HDBaseT (registered trademark) or the like. Good. Further, the interface for connecting to the projector 200 may be a communication interface such as Ethernet (registered trademark) or IEEE 1394.
Further, the first control unit 120 may transmit the image data to the projector 200 via wireless communication such as Wi-Fi (registered trademark).

[4. Configuration of the first control unit]
The first control unit 120 of the document camera 100 includes a first determination unit 121, a second determination unit 122, a third determination unit 123, an imaging instruction unit 124, and a transmission / reception unit 125. Specifically, the first processor 120A of the first control unit 120 executes the first control program stored in the first memory 120B to execute the first determination unit 121, the second determination unit 122, and the third determination. It functions as a unit 123, an image pickup instruction unit 124, and a transmission / reception unit 125.

The first determination unit 121 determines the frame rate FR in which the imaging unit 190 generates captured image data.
Specifically, the first determination unit 121 determines the frame rate FR for executing the imaging process to be the first frame rate FR1 when the imaging unit 190 does not execute the autofocus operation. Further, when the imaging unit 190 executes the autofocus operation, the first determination unit 121 determines the frame rate FR for executing the imaging process to be the second frame rate FR2. The second frame rate FR2 is larger than the first frame rate FR1.
The second frame rate FR2 is, for example, 30 fps in the first embodiment described with reference to FIGS. 4 and 5. The second frame rate FR2 is, for example, 60 fps in the second embodiment described with reference to FIGS. 6 and 7 and the third embodiment described with reference to FIG.
In the embodiment of the present invention, the autofocus operation means a one-shot autofocus operation.

The second determination unit 122 determines the resolution RS of the captured image data generated by the imaging unit 190.
For example, when the image pickup unit 190 does not execute the autofocus operation, the second determination unit 122 determines the resolution RS of the captured image data generated by the image pickup unit 190 to be the first resolution RS1. Further, the second determination unit 122 determines the resolution RS of the captured image data generated by the imaging unit 190 to be the second resolution RS2, for example, when the imaging unit 190 executes the autofocus operation. The second resolution RS2 is lower than, for example, the first resolution RS1.
The first resolution RS1 is, for example, 1080p (= 1920 pixels × 1080 pixels). The second resolution RS2 is, for example, 720p (= 1280 pixels × 720 pixels) in the second embodiment described with reference to FIGS. 6 and 7.
The relationship between the first resolution RS1 and the second resolution RS2 will be described in detail later with reference to FIG. 7.

The third determination unit 123 determines the compression rate CR of the captured image data generated by the imaging unit 190.
For example, when the imaging unit 190 does not execute the autofocus operation, the third determination unit 123 determines the compression rate CR of the captured image data generated by the imaging unit 190 to be the first compression rate CR1. Further, for example, when the imaging unit 190 executes the autofocus operation, the third determination unit 123 determines the compression rate CR of the captured image data generated by the imaging unit 190 to be the second compression rate CR2. The second compression rate CR2 is higher than, for example, the first compression rate CR1.
The first compression rate CR1 is, for example, 1/20. The second compressibility CR2 is, for example, 1/40 in the third embodiment described with reference to FIG.

The image pickup instruction unit 124 takes an image in the image pickup unit 190 based on the frame rate FR determined by the first determination unit 121, the resolution RS determined by the second determination unit 122, and the compression rate CR determined by the third determination unit 123. Generate image data.

When the image pickup unit 190 does not perform the autofocus operation, the transmission / reception unit 125 transmits the captured image data to the projector 200. Further, when the imaging unit 190 executes the autofocus operation, the transmission / reception unit 125 transmits the execution information indicating that the autofocus operation is being executed to the projector 200.
Specifically, when the imaging unit 190 starts the autofocus operation, the transmission / reception unit 125 transmits information indicating that the execution of the AF process is started to the projector 200. Further, when the imaging unit 190 ends the autofocus operation, the transmission / reception unit 125 transmits information indicating that the execution of the AF process has been completed to the projector 200.

[5. First Embodiment]
[5-1. Processing of the first control unit according to the first embodiment]
Next, the processing of the first control unit 120 and the second control unit 250 according to the first embodiment will be described with reference to FIGS. 4 and 5.
When the imaging unit 190 does not execute the autofocus operation, the first determination unit 121 according to the first embodiment determines the frame rate FR for executing the imaging process to be the first frame rate FR1. Further, when the imaging unit 190 executes the autofocus operation, the first determination unit 121 determines the frame rate FR for executing the imaging process to be the second frame rate FR2. The second frame rate FR2 is, for example, 30 fps.
The second determination unit 122 according to the first embodiment determines the resolution RS of the captured image data generated by the imaging unit 190 to be the first resolution RS1.
The third determination unit 123 according to the first embodiment determines the compression rate CR of the captured image data generated by the image pickup unit 190 to be the first compression rate CR1.
That is, in the first embodiment, when the imaging unit 190 executes the autofocus operation, the first control unit 120 changes the frame rate FR from the first frame rate FR1 to the second frame rate FR2, and the resolution RS. Is held at the first resolution RS1 and the compression rate CR is held at the first compression rate CR1.

FIG. 4 is a flowchart showing an example of processing of the first control unit 120 in the first embodiment.
First, in step SA101, the first control unit 120 determines the frame rate FR to be the first frame rate FR1, determines the resolution RS of the captured image data to be the first resolution RS1, and determines the compression rate CR of the captured image data. 1 The compression rate is determined to be CR1.
Next, in step SA103, the first control unit 120 determines whether or not an instruction to execute the AF process has been received from the first operation unit 140.
When the first control unit 120 determines that the instruction to execute the AF process is not received from the first operation unit 140 (step SA103; NO), the process proceeds to step SA119. When the first control unit 120 determines that the instruction to execute the AF process has been received from the first operation unit 140 (step SA103; YES), the process proceeds to step SA105.
Then, in step SA105, information indicating that the execution of the AF process is started is transmitted to the second control unit 250 of the projector 200.
The information indicating that the execution of the AF process is started corresponds to an example of the executing information.

Next, in step SA107, the first determination unit 121 determines the frame rate FR for executing the imaging process to be the second frame rate FR2.
Next, in step SA109, the imaging instruction unit 124 instructs the imaging unit 190 to generate an image under the conditions of the second frame rate FR2, the first resolution RS1, and the first compression rate CR1. The image pickup unit 190 generates an image under the conditions of the second frame rate FR2, the first resolution RS1, and the first compression rate CR1.
Next, in step SA111, the first control unit 120 executes AF processing.
Next, in step SA113, the first control unit 120 determines whether or not the AF process has been completed.
When the first control unit 120 determines that the AF process has not been completed (step SA113; NO), the process returns to step SA109. When the first control unit 120 determines that the AF process is completed (step SA113; YES), the process proceeds to step SA115.
Then, in step SA115, the first control unit 120 transmits information indicating that the execution of the AF process has been completed to the second control unit 250 of the projector 200.
The information indicating that the execution of the AF process is completed corresponds to an example of the executing information.
Next, in step SA117, the first control unit 120 returns the frame rate FR for executing the imaging process to the first frame rate FR1. After that, the process returns to step SA103.

When the first control unit 120 determines that the instruction to execute AF is not received from the first operation unit 140 (step SA103; NO), in step SA119, the image pickup instruction unit 124 sets the first frame rate FR1. The image pickup unit 190 is instructed to generate an image under the conditions of the first resolution RS1 and the first compression rate CR1. The imaging unit 190 generates an image under the conditions of the first frame rate FR1, the first resolution RS1, and the first compression rate CR1.
Next, in step SA121, the transmission / reception unit 125 transmits the image generated by the image pickup unit 190 to the second control unit 250 of the projector 200.
Next, in step SA123, the first control unit 120 determines whether or not to end the display of the image on the projector 200.
When the first control unit 120 determines that the display of the image on the projector 200 is not finished (step SA123; NO), the process returns to step SA103. When the first control unit 120 determines that the display of the image on the projector 200 is finished (step SA123; YES), the process is finished.

As described with reference to FIG. 4, since the image is generated at the second frame rate FR2 during the execution of the AF processing, the time required for the AF processing can be shortened. Specifically, the frame rate FR is set to, for example, 30 fps during the execution of the AF process. As a result, for example, the time required for AF processing can be shortened from 6 seconds to 4 seconds.

[5-2. Processing of the second control unit according to the first embodiment]
FIG. 5 is a flowchart showing an example of processing of the second control unit 250 in the first embodiment.
As shown in FIG. 5, in step SB101, the second control unit 250 determines whether or not the information indicating that the execution of the AF process is started has been received.
When the second control unit 250 determines that the information indicating that the execution of the AF process is to be started has not been received (step SB101; NO), the process proceeds to step SB109. When the second control unit 250 determines that the information indicating that the execution of the AF process is to be started has been received (step SB101; YES), the process proceeds to step SB103.
Next, in step SB103, the second control unit 250 reads a specific image from the second memory 251.
Next, in step SB 105, the second control unit 250 displays the specific image on the screen SC.
Next, in step SB 107, the second control unit 250 determines whether or not the information indicating that the execution of the AF process has been completed has been received.
When the second control unit 250 determines that the information indicating that the execution of the AF process has been completed has not been received (step SB107; NO), the process returns to step SB105. When the second control unit 250 determines that the information indicating that the execution of the AF process has been completed has been received (step SB107; YES), the process returns to step SB101.

When the second control unit 250 determines that the information indicating that the execution of the AF process is to be started has not been received (step SB101; NO), in step SB109, the image pickup unit 190 of the second control unit 250 Receive the captured image.
Next, in step SB111, the second control unit 250 decompresses the received image.
Next, in step SB 113, the second control unit 250 displays the decompressed image on the screen SC.
Next, in step SB 115, the second control unit 250 determines whether or not to end the display of the image on the projector 200.
When the second control unit 250 determines that the display of the image on the projector 200 is not finished (step SB115; NO), the process returns to step SB101. When the second control unit 250 determines that the display of the image on the projector 200 is finished (step SB115; YES), the process is finished.

As described with reference to FIG. 5, during the execution of the AF process, a specific image indicating that the document camera 100 is executing the AF process is displayed on the screen SC. Therefore, the user can confirm that the AF process is being executed.

As described with reference to FIGS. 3 to 5, in the first embodiment, when the imaging unit 190 executes the autofocus operation, the transmission / reception unit 125 is executing the autofocus operation. The execution information indicating the above is transmitted to the projector 200, but the embodiment of the present invention is not limited to this. For example, when the imaging unit 190 executes the autofocus operation, the transmission / reception unit 125 may transmit image data indicating that the autofocus operation is being executed. In this case, the projector 200 displays an image corresponding to the image data received from the document camera 100 on the screen SC.

[6. Second Embodiment]
[6-1. Processing of the first control unit according to the second embodiment]
Next, the first control unit 120 according to the second embodiment will be described with reference to FIGS. 6 and 7.
When the image pickup unit 190 does not execute the autofocus operation, the second determination unit 122 according to the second embodiment determines the resolution RS of the captured image data generated by the image pickup unit 190 to be the first resolution RS1. Further, when the imaging unit 190 executes the autofocus operation, the second determination unit 122 determines the resolution RS of the captured image data generated by the imaging unit 190 to be the second resolution RS2. The first resolution RS1 is, for example, 1080p (= 1920 pixels × 1080 pixels). The second resolution RS2 is, for example, 720p (= 1280 pixels × 720 pixels).
The third determination unit 123 according to the second embodiment determines the compression rate CR of the captured image data generated by the image pickup unit 190 to be the first compression rate CR1.
The first determination unit 121 according to the second embodiment determines the frame rate FR for executing the imaging process to be the first frame rate FR1 when the imaging unit 190 does not execute the autofocus operation. Further, when the imaging unit 190 executes the autofocus operation, the first determination unit 121 determines the frame rate FR for executing the imaging process to be the second frame rate FR2. The second frame rate FR2 is, for example, 60 fps.
That is, in the second embodiment, when the imaging unit 190 executes the autofocus operation, the first control unit 120 changes the resolution RS from the first resolution RS1 to the second resolution RS2 and sets the frame rate FR to the second. The 1-frame rate FR1 is changed to the 2nd frame rate FR2, and the compression rate CR is held at the 1st compression rate CR1.

FIG. 6 is a flowchart showing an example of processing of the first control unit 120 in the second embodiment. When the second determination unit 122 executes the autofocus operation, the first control unit 120 according to the second embodiment sets the resolution RS of the captured image data generated by the imaging unit 190 to the second. It differs from the first embodiment in that the resolution RS2 is determined.
In the following description, the differences from the first embodiment will be described, and the description of the same processing as that of the first embodiment will be omitted.

Each of step SA201 to step SA205 of FIG. 6 corresponds to step SA101 to step SA105 of FIG. 4, and each of step SA211 to step SA223 of FIG. 6 corresponds to step SA111 to step SA123 of FIG.

In step SA207 of FIG. 6, the second determination unit 122 determines the resolution RS of the captured image data generated by the imaging unit 190 to be the second resolution RS2, and the first determination unit 121 determines the frame rate FR for executing the imaging process. Is determined to be the second frame rate FR2.
Next, in step SA209, the image pickup instruction unit 124 instructs the image pickup unit 190 to generate an image under the conditions of the second frame rate FR2, the second resolution RS2, and the first compression rate CR1. The image pickup unit 190 generates an image under the conditions of the second frame rate FR2, the second resolution RS2, and the first compression rate CR1.

FIG. 7 is a diagram showing an example of the captured image P1 of the first resolution RS1 and the captured image P2 of the second resolution RS2. In the captured image P1 of the first resolution RS1, the number of pixels in the horizontal direction is the number of pixels ND1 and the number of pixels in the vertical direction is the number of pixels MD1. The number of pixels ND1 is, for example, 1920 pixels, and the number of pixels MD1 is, for example, 1080 pixels.
In the captured image P2 of the second resolution RS2, the number of pixels in the horizontal direction is the number of pixels ND2, and the number of pixels in the vertical direction is the number of pixels MD2. The number of pixels ND2 is, for example, 1280 pixels, and the number of pixels MD2 is, for example, 720 pixels.
Further, the captured image P2 of the second resolution RS2 corresponds to the image of the central portion of the captured image P1 of the first resolution RS1. That is, the center position of the captured image P2 coincides with the center position of the captured image P1.
As described above, since the center position of the captured image P2 coincides with the center position of the captured image P1, when the captured image P2 of the second resolution RS2 is used instead of the captured image P1 of the first resolution RS1, the autofocus is performed. The influence on the operation can be suppressed. In other words, even when the captured image P2 of the second resolution RS2 is used, the autofocus operation can be normally executed.

As described with reference to FIGS. 6 and 7, during the execution of the AF process, the image is generated at the second resolution RS2, so that the second frame rate FR2 can be increased. Therefore, the time required for the AF process can be further shortened. Specifically, during the execution of the AF process, the resolution RS is set to, for example, 720p, and the frame rate FR is set to, for example, 60 fps. As a result, for example, the time required for AF processing can be shortened from 6 seconds to 2 seconds.

[6-2. Processing of the second control unit according to the second embodiment]
Since the processing of the second control unit 250 according to the second embodiment is the same as the processing of the second control unit 250 in the first embodiment described with reference to FIG. 5, the description thereof will be omitted.

[7. Third Embodiment]
[7-1. Processing of the first control unit according to the third embodiment]
When the imaging unit 190 does not execute the autofocus operation, the third determination unit 123 according to the third embodiment determines the compression rate CR of the captured image data generated by the imaging unit 190 to be the first compression rate CR1. .. Further, when the imaging unit 190 executes the autofocus operation, the third determination unit 122 determines the compression rate CR of the captured image data generated by the imaging unit 190 to be the second compression rate CR2. The first compression rate CR1 is, for example, 1/20. The second compression rate CR2 is, for example, 1/40.
The second determination unit 122 according to the third embodiment determines the resolution RS of the captured image data generated by the imaging unit 190 to be the first resolution RS1.
When the imaging unit 190 does not execute the autofocus operation, the first determination unit 121 according to the third embodiment determines the frame rate FR for executing the imaging process to be the first frame rate FR1. Further, when the imaging unit 190 executes the autofocus operation, the first determination unit 121 determines the frame rate FR for executing the imaging process to be the second frame rate FR2. The second frame rate FR2 is, for example, 60 fps.
That is, in the second embodiment, when the imaging unit 190 executes the autofocus operation, the first control unit 120 changes the compression rate CR from the first compression rate CR1 to the second compression rate CR2, and the frame rate. The FR is changed from the first frame rate FR1 to the second frame rate FR2, and the resolution RS is held at the first resolution RS1.

FIG. 8 is a flowchart showing an example of processing of the first control unit 120 in the third embodiment. In the first control unit 120 according to the third embodiment, when the second determination unit 122 executes the autofocus operation, the compression rate CR of the captured image data generated by the imaging unit 190 is determined. 2 It differs from the first embodiment in that the compression ratio is determined to be CR2.
In the following description, the differences from the first embodiment will be described, and the description of the same processing as that of the first embodiment will be omitted.

Each of step SA301 to step SA305 of FIG. 8 corresponds to step SA101 to step SA105 of FIG. 4, and each of step SA311 to step SA323 of FIG. 8 corresponds to step SA111 to step SA123 of FIG.

In step SA307 of FIG. 8, when the imaging unit 190 executes the autofocus operation, the third determination unit 123 determines the compression rate CR of the captured image data generated by the imaging unit 190 to be the second compression rate CR2. Then, the first determination unit 121 determines the frame rate FR for executing the imaging process to be the second frame rate FR2.
Next, in step SA309, the image pickup instruction unit 124 instructs the image pickup unit 190 to generate an image under the conditions of the second frame rate FR2, the first resolution RS1, and the second compression rate CR2. The imaging unit 190 generates an image under the conditions of the second frame rate FR2, the first resolution RS1, and the second compression rate CR2.

As described with reference to FIG. 8, during the execution of the AF process, the image is generated at the second compression rate CR2, so that the second frame rate FR2 can be increased. Therefore, the time required for the AF process can be further shortened. Specifically, during the execution of the AF process, the compression rate CR is set to, for example, 1/40, and the frame rate FR is set to, for example, 60 fps. As a result, for example, the time required for AF processing can be shortened from 6 seconds to 2 seconds.

[8. Relationship between frame rate and AF time]
FIG. 9 is a graph showing an example of the relationship between the frame rate FR and the autofocus time TA.
The horizontal axis of FIG. 9 shows the frame rate FR, and the vertical axis shows the autofocus time TA. The autofocus time TA indicates the time required for AF processing.
As shown in the graph G1 of FIG. 9, as the frame rate FR increases, the autofocus time TA becomes shorter.

[9. Embodiments of the present invention and effects]
As described above with reference to FIGS. 1 to 9, the control method of the display system 1 according to the embodiment of the present invention includes the document camera 100, the projector 200 communicably connected to the document camera 100, and the projector 200. In the control method of the display system 1, the document camera 100 executes an imaging process at the first frame rate FR1 when the autofocus operation is not executed, and executes the autofocus operation when the autofocus operation is executed. , The imaging process is executed at the second frame rate FR2, which is larger than the first frame rate FR1.
Therefore, when the autofocus operation is executed, the imaging process is executed at the second frame rate FR2, which is larger than the first frame rate FR1, so that the time required for the AF process can be shortened.

Further, when the document camera 100 is connected, the projector 200 determines the frame rate FR in the communication with the document camera 100 to be the first frame rate FR1, and the information indicating the first frame rate FR1 is transmitted to the document camera 100. Send to.
Therefore, the projector 200 determines the frame rate FR in the communication with the document camera 100 as the first frame rate FR1 and transmits the information indicating the first frame rate FR1 to the document camera 100, so that the projector 200 and the document camera 100 are used. Communication at the first frame rate FR1 can be executed between the two.

Further, the document camera 100 generates a captured image of the first resolution RS1 when the autofocus operation is not executed, and when the autofocus operation is executed, the second resolution RS2 lower than the first resolution RS1. Generates a captured image of.
Therefore, when the autofocus operation is executed, the frame rate FR can be increased because the captured image of the second resolution RS2 lower than the first resolution RS1 is generated. Therefore, the time required for the AF process can be shortened.

Further, the captured image P2 of the second resolution RS2 corresponds to the image of the central portion of the captured image P1 of the first resolution RS1.
The autofocus process is executed using the image in the center of the captured image P1. Therefore, since the captured image P2 of the second resolution RS2 corresponds to the image of the central portion of the captured image P1 of the first resolution RS1, the captured image P2 of the second resolution RS2 is replaced with the captured image P1 of the first resolution RS1. When used, the influence on the autofocus operation can be suppressed. In other words, even when the captured image P2 of the second resolution RS2 is used, the autofocus operation can be normally executed.

Further, the document camera 100 generates an image captured by the first compressibility CR1 when the autofocus operation is not executed, and when the autofocus operation is executed, the second is higher than the first compressibility CR1. An image captured with a compression ratio of CR2 is generated.
Therefore, when the autofocus operation is executed, the frame rate FR can be increased because the captured image of the second compression rate CR2, which is higher than the first compression rate CR1, is generated. Therefore, the time required for the AF process can be shortened.

Further, the document camera 100 transmits captured image data to the projector 200 when the autofocus operation is not executed, and when the autofocus operation is executed, the autofocus camera 100 transmits the autofocus to the projector 200. Sends image data indicating that the operation is being executed.
Therefore, when the autofocus operation is not executed, the captured image data is transmitted to the projector 200, so that the projector 200 can display the captured image on the screen SC.
Further, when the autofocus operation is executed, the projector 200 corresponds to the received image data because the image data indicating that the autofocus operation is being executed is transmitted to the projector 200. The image can be displayed on the screen SC. Therefore, the user can confirm that the autofocus operation is being executed.

Further, when the document camera 100 executes the autofocus operation, the document camera 100 transmits execution information indicating that the autofocus operation is being executed to the projector 200, and the projector 200 transmits the execution information. When received, an image indicating that the autofocus operation is being executed is displayed.
Therefore, when the autofocus operation is executed, the projector 200 displays an image indicating that the autofocus operation is being executed, so that the user can confirm that the autofocus operation is being executed. ..

Further, the document camera 100 executes the autofocus operation based on the operation by the user.
Therefore, the time required for AF processing in one-shot AF can be shortened.

The display system 1 according to the embodiment of the present invention is a display system 1 including a document camera 100 and a projector 200 communicatively connected to the document camera 100, and the document camera 100 operates an autofocus operation. If not executed, the imaging process is executed at the first frame rate FR1, and if the autofocus operation is executed, the imaging process is executed at the second frame rate FR2 larger than the first frame rate FR1, and the projector 200 Displays the captured image generated by the document camera 100 when the document camera 100 does not perform the autofocus operation.
Therefore, when the autofocus operation is executed, the imaging process is executed at the second frame rate FR2, which is larger than the first frame rate FR1, so that the time required for the AF process can be shortened. Further, when the autofocus operation is not executed, the captured image generated by the document camera 100 can be displayed.

The document camera 100 according to the embodiment of the present invention is a document camera 100 including a first control unit 120 and communicably connected to the projector 200, and the first control unit 120 does not execute the autofocus operation. In this case, the imaging process is executed at the first frame rate FR1, and when the autofocus operation is executed, the imaging process is executed at the second frame rate FR2, which is larger than the first frame rate FR1.
Therefore, when the autofocus operation is executed, the imaging process is executed at the second frame rate FR2, which is larger than the first frame rate FR1, so that the time required for the AF process can be shortened.

[10. Other embodiments]
The above-described embodiment of the present invention is a preferred embodiment. However, the present invention is not limited to the above-described embodiment, and various modifications can be carried out within a range that does not deviate from the gist.
In the embodiment of the present invention, the case where the "imaging apparatus" is configured as the document camera 100 will be described, but the embodiment of the present invention is not limited to this. The "imaging apparatus" may include an imaging unit 190, a first image processing unit 170, and a first control unit 120.

Further, in the embodiment of the present invention, the case where the document camera 100 transmits the image data to the projector 200 by the USB cable 109 will be described, but the embodiment of the present invention is not limited to this. For example, the document camera 100 may transmit image data to the projector 200 via an analog interface such as VGA, a D terminal, or an S terminal. Further, for example, the document camera 100 may transmit image data to the projector 200 via a digital interface such as HDMI (registered trademark), DisplayPort, HDBaseT (registered trademark) or the like. Further, for example, the document camera 100 may transmit image data to the projector 200 via wireless communication such as Wi-Fi (registered trademark).

Further, in the embodiment of the present invention, the case where the "display device" is the projector 200 will be described, but the embodiment of the present invention is not limited to this. The "display device" may receive the image data transmitted from the document camera 100 and display it. For example, the "display device" may be displayed on an LCD or the like.

Further, in the embodiment of the present invention, when the imaging unit 190 executes the autofocus operation, the second determination unit 122 determines the resolution RS to the second resolution RS2 as in the second embodiment. Alternatively, as in the third embodiment, the third determination unit 123 determines the compression rate CR to be the second compression rate CR2, but the embodiment of the present invention is not limited to this. For example, when the imaging unit 190 executes the autofocus operation, the second determination unit 122 determines the resolution RS to the second resolution RS2, and the third determination unit 123 secondly compresses the compression rate CR. The rate CR2 may be determined. In this case, there is a possibility that the second frame rate FR2 can be further increased. Therefore, there is a possibility that the time required for the AF process can be further shortened.

Further, each functional unit shown in FIGS. 2 and 3 shows a functional configuration, and a specific mounting form is not particularly limited. That is, it is not always necessary to implement hardware corresponding to each functional unit individually, and it is of course possible to realize a configuration in which the functions of a plurality of functional units are realized by executing a program by one processor. Further, a part of the functions realized by the software in the above embodiment may be realized by the hardware, or a part of the functions realized by the hardware may be realized by the software. In addition, the specific detailed configuration of each of the other parts of the document camera 100 can be arbitrarily changed without departing from the spirit.

Further, the processing units of the flowcharts shown in FIGS. 4, 5, 6 and 8 correspond to the main processing contents in order to make the processing of the first control unit 120 or the second control unit 250 easier to understand. It is divided into pieces. It is not limited by the method and name of division of the processing unit shown in the flowchart shown in each of FIGS. 4, 5, 6 and 8, and may be further divided into more processing units according to the processing content. It can be divided so that one processing unit includes more processing. Further, the processing order of the above flowchart is not limited to the illustrated example.

Further, as a control method of the display system 1, the first processor 120A included in the drawing camera 100 executes a first control program corresponding to the control method of the display system 1, and the second processor 253 included in the projector 200 causes the display system. This can be realized by executing the second control program corresponding to the control method of 1. Further, each of the first control program and the second control program can be recorded on a recording medium readable by a computer. As the recording medium, a magnetic or optical recording medium or a semiconductor memory device can be used. Specifically, it is a portable or fixed flexible disk, HDD, CD-ROM (Compact Disk Read Only Memory), DVD, Blu-ray (registered trademark) Disc, magneto-optical disk, flash memory, card-type recording medium, or the like. The recording medium of the formula can be mentioned. Further, the recording medium may be a non-volatile storage device such as RAM, ROM, or HDD, which is an internal storage device included in the image processing device. Further, each of the first control program and the second control program corresponding to the control method of the display system 1 is stored in the server device or the like, the first control program is downloaded from the server device to the drawing camera 100, and the server device. It is also possible to realize the control method of the display system 1 by downloading the second control program from the projector 200 to the projector 200.

1 ... Display system, 100 ... Document camera (imaging device), 102 ... Base, 104 ... Mounting surface, 106 ... Arm, 108 ... Camera head, 109 ... USB cable, 110 ... Operation panel, 120 ... First control unit (Control unit), 120A ... 1st processor, 120B ... 1st memory, 121 ... 1st determination unit, 122 ... 2nd determination unit, 123 ... 3rd determination unit, 124 ... Imaging instruction unit, 125 ... Transmission / reception unit, 130 ... 1st storage unit, 140 ... 1st operation unit, 150 ... light source control unit, 151 ... light source, 160 ... USB interface unit, 170 ... 1st image processing unit, 180 ... resolution conversion unit, 190 ... imaging unit, 191 ... Imaging lens, 192 ... Imaging element, 200 ... Projector (display device), 210 ... Projection unit, 211 ... Light source unit, 212 ... Optical modulator, 213 ... Projection optical system, 215 ... Liquid crystal panel, 220 ... Drive unit, 221 ... Light source drive unit, 222 ... Optical modulator drive unit, 231 ... Second operation unit, 235 ... Input interface, 241 ... Image interface, 245 ... Image processing unit, 250 ... Second control unit, 251 ... Second memory, 253 ... 2nd processor, CR ... compression rate, CR1 ... 1st compression rate, CR2 ... 2nd compression rate, FR ... frame rate, FR1 ... 1st frame rate, FR2 ... 2nd frame rate, G1 ... graph, MD1, MD2, ND1, ND2 ... Number of pixels, P1, P2 ... Captured image, RS ... Resolution, RS1 ... 1st resolution, RS2 ... 2nd resolution, SC ... Screen, TA ... Autofocus time.

Claims (10)

A control method for a display system including an image pickup device and a display device communicably connected to the image pickup device.
When the image pickup apparatus does not execute the autofocus operation, the image pickup process is executed at the first frame rate, and when the autofocus operation is executed, the second frame rate is larger than the first frame rate. A control method for the display system that executes the imaging process in. When the image pickup device is connected, the display device determines the frame rate in communication with the image pickup device to the first frame rate, and transmits information indicating the first frame rate to the image pickup device. The method for controlling a display system according to claim 1. When the autofocus operation is not executed, the imaging device generates an image captured with a first resolution, and when the autofocus operation is executed, an image capture with a second resolution lower than the first resolution is performed. The method for controlling a display system according to claim 1 or 2, wherein an image is generated. The control method for a display system according to claim 3, wherein the second-resolution captured image corresponds to an image in the center of the first-resolution captured image. When the image pickup apparatus does not execute the autofocus operation, it generates an image captured with a first compression rate, and when the autofocus operation is executed, the second compression is higher than the first compression rate. The method for controlling a display system according to any one of claims 1 to 4, wherein an image of the rate is generated. When the image pickup device does not execute the autofocus operation, it transmits captured image data to the display device, and when the autofocus operation is executed, the image pickup device transmits the photographed image data to the display device. The method for controlling a display system according to any one of claims 1 to 5, wherein image data indicating that the autofocus operation is being executed is transmitted. When executing the autofocus operation, the imaging device transmits execution information indicating that the autofocus operation is being executed to the display device.
The control of the display system according to any one of claims 1 to 5, wherein the display device displays an image indicating that the autofocus operation is being executed when the execution information is received. Method. The control method for a display system according to any one of claims 1 to 6, wherein the imaging device executes the autofocus operation based on an operation by the user. A display system including an image pickup device and a display device communicatively connected to the image pickup device.
When the image pickup apparatus does not execute the autofocus operation, the image pickup process is executed at the first frame rate, and when the autofocus operation is executed, the second frame rate is larger than the first frame rate. Execute the imaging process with
The display device is a display system that displays an image captured by the image pickup device when the image pickup device does not perform the autofocus operation. An imaging device that has a control unit and is communicatively connected to a display device.
When the control unit does not execute the autofocus operation, the imaging process is executed at the first frame rate, and when the autofocus operation is executed, the second frame rate is higher than the first frame rate. An imaging device that executes an imaging process with.

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