KR20190040633A - Distortion correction method and distortion correction system for projection display using personal digital imaging device - Google Patents

Abstract

Disclosed are a method for correcting distortion of an image in a projection display using a personal digital image device, and a system thereof. Specifically, the present invention provides the method for correcting distortion of an image for a method for correcting distortion of an image in a personal digital image device realized by a computer, which comprises the steps of: photographing an image displayed on a projection surface projected by a projection display through a camera of the personal digital image device; measuring the amount of distortion of the image displayed on the projection surface using the photographed image; and transferring the measured amount of distortion to an image correction device of the projection display.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for correcting image distortion of a projection type display using a personal digital imaging device, and a system therefor. [0002] DISTORTION CORRECTION METHOD AND DISTORTION CORRECTION SYSTEM FOR PROJECTION DISPLAY USING PERSONAL DIGITAL IMAGING DEVICE [

The following description relates to a technique for correcting image distortion of a projection display.

In a typical projection display, image distortion occurs depending on the relative position of the screen and the projector.

In order to correct distorted images by trapezoidal shape, etc., various image restoration methods such as keystone distortion are used.

For example, Korean Patent Registration No. 10-0469265 (filed Jan. 21, 2005) discloses a technique of performing keystone correction in a horizontal direction after setting a keystone area to be corrected using a mouse remote controller.

Recently, as the infotainment market of vehicles such as automobiles and airplanes is rapidly growing, interest in HUD (head-up display) is increasing.

The HUD is a front display device in which driving information is displayed on a windshield of a moving object. When an image is directly displayed on a window, image distortion occurs due to the curvature of the window itself.

Since the shape of the window is different according to the type of mobile object or model, it is possible to perform individual correction using a predetermined value such as a look-up table, but it is impossible to correct image distortion according to the user's position.

A method and system for correcting image distortion in a projection display using a personal digital imaging device.

The present invention provides a method and system capable of adjusting the amount of image distortion at a user's position with respect to an image of a projection-type display and adjusting the image according to a user's time.

A method of correcting image distortion in a personal digital imaging apparatus implemented by a computer, the method comprising: capturing an image displayed on a projection surface by being projected on a projection display through a camera of the personal digital imaging apparatus; Measuring a distortion amount of an image displayed on the projection surface using the photographed image; And transmitting the measured distortion amount to an image correction apparatus of the projection display.

According to an aspect of the present invention, the measuring step may include determining whether the image displayed on the projection surface is distorted or distorted using the photographed image; And calculating a correction amount according to a degree of distortion of the image displayed on the projection surface.

According to another aspect of the present invention, the determining may include obtaining a modified pattern image corresponding to the image displayed on the projection surface in the photographed image, and then comparing the modified pattern image with a reference pattern image, The degree of distortion and the degree of distortion of the image displayed on the display unit 100 can be determined.

According to another aspect, the measuring step may include: obtaining a deformed pattern image corresponding to the image displayed on the projection surface in the captured image; Comparing the deformed pattern image with a reference pattern image to determine a degree of distortion of the image displayed on the projection surface; And calculating a correction amount according to the degree of distortion based on a result of comparing the deformed pattern image and the reference pattern image.

According to another aspect of the present invention, when the image distortion correction function is performed in the personal digital imaging device, the digital image is automatically paired with the image correction device, and the step of transmitting includes: correcting distortion of the image displayed on the projection surface by the paired image correction device Amount can be transmitted.

According to another aspect of the present invention, the image correction apparatus corrects distortion of an image projected on the projection surface based on the amount of distortion received, and the image distortion correction method further comprises: And repeating the measuring step to verify the distortion corrected image.

According to another aspect of the present invention, the step of photographing includes acquiring an image to be subjected to distortion correction by storing the camera image when the image displayed on the projection surface is captured in a central region of the camera screen; And outputting a message requesting a position adjustment when the image displayed on the projection surface is captured outside the central region of the camera screen as a voice or as an image on the camera screen.

A method of correcting image distortion in a personal digital imaging apparatus implemented by a computer, the method comprising: capturing an image displayed on a projection surface by being projected on a projection display through a camera of the personal digital imaging apparatus; And transmitting the photographed image to an image correction device of the projection display. The image correction device calculates an amount of correction according to a degree of distortion of an image displayed on the projection surface using the received image, And correcting distortion of the image.

There is provided a computer program stored in a computer-readable recording medium for causing a computer to execute the image distortion correction method in combination with a computer.

There is provided a computer-readable recording medium having recorded thereon a program for causing a computer to execute the image distortion correction method.

Claims 1. An image distortion correction system in a computer-implemented personal digital imaging device, the system comprising: at least one processor implemented to execute computer readable instructions, the at least one processor comprising: An acquiring unit for acquiring a camera image projected on the projection display through the projection lens to capture an image displayed on the projection surface; A calculation unit for calculating a distortion amount of an image displayed on the projection surface using the camera image; And a transmission unit for transmitting the calculated amount of distortion to the image correction apparatus of the projection display.

According to embodiments of the present invention, it is possible to easily and easily correct image distortion of a projection display using a personal digital imaging device.

According to embodiments of the present invention, by measuring the amount of image distortion at the position of the user using a personal digital video device with respect to the image of the projection display, it is possible to customize the image according to the user's viewpoint, Lt; / RTI >

FIG. 1 and FIG. 2 are views showing examples of image distortion and correction environment of a projection display in an embodiment of the present invention.
3 is a block diagram for explaining an example of an internal configuration of a computer system in an embodiment of the present invention.
4 is a diagram illustrating an example of components that a processor of a computer system according to an embodiment of the present invention may include.
5 is a flowchart illustrating an example of an image distortion correction method that can be performed by a computer system according to an embodiment of the present invention.
FIGS. 6 to 10 are exemplary diagrams for explaining a process of correcting distortion of an image projected on a projection type display using a personal digital imaging device in an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a technique for correcting image distortion of a projection display, and more particularly, to a technique for measuring an amount of image distortion at a user's position using a personal digital imaging device.

Embodiments, including those specifically disclosed herein, can compensate for image distortion in projection displays using personal digital imaging devices and provide significant advantages in terms of accuracy, efficiency, convenience, ease of use, and cost savings .

1, the projection type display 110 is an apparatus for projecting and displaying an image on a projection surface 10, and is a device for displaying the shape of the projection surface 10, the relative position of the projection type display 110 and the projection surface 10 , The image projected onto the projection surface 10 is distorted according to the observation position (eye level) of the user 101 and the like. In other words, the image projected on the projection surface 10 may be distorted due to various reasons such as an improper projection position, a change in position of the user (observer) 101, a curvature of the projection surface 10 on which the image is projected, and the like.

In the present invention, a personal digital imaging apparatus is used to correct the image distortion of the projection display according to the observation position (eye level) of the user 101. In this specification, the personal digital imaging device may refer to all devices capable of image capturing. For example, it may be a smartphone, a wearable device, a tablet, a navigation device, a notebook, , A PDA (Personal Digital Assistants), a PMP (Portable Multimedia Player), and the like.

2, in the present invention, the image projected onto the projection surface 10 is photographed at the eye-level position of the user 101 using the personal digital imaging apparatus 200 possessed by the user 101, The image projected on the projection surface 10 can be corrected on the basis of the amount of distortion of the image photographed at the eye level position of the projection lens.

The image distortion correction technique using the personal digital imaging device 200 according to the present invention is applicable to all cases where the display module is a projection type and image distortion occurs for various reasons. For example, when the position of the user 101 is changed or moved when the position of the projection display 110 is changed or moved, and when the projection surface 10 is not flat and curved, The image distortion correction technique using the personal digital imaging device can be applied in various cases such as adjusting the transmitted / projected image in accordance with the individual field of view.

3 is a block diagram for explaining an example of an internal configuration of a computer system in an embodiment of the present invention.

The computer system 300 of FIG. 3 corresponds to the personal digital imaging device 200 described with reference to FIG. 2. The personal digital imaging device 200 may be configured with a computer-implemented image distortion correction system. The image distortion correction system may be configured as a PC-based program or an application dedicated to a mobile terminal. The image distortion correction system according to the present embodiment may be implemented as an independently operating program or as an in-app form of a specific application so as to be able to operate on the specific application. The image distortion correction system may be implemented as an application installed on the personal digital imaging device 200 to provide an image distortion correction function.

In other words, an image distortion correction system according to embodiments of the present invention may be implemented through the computer system 300 of FIG. 3, the computer system 300 includes a processor 310, a memory 320, a persistent storage 330, a bus 340, an input / output interface (not shown) 350 and a network interface 360.

Processor 310 may include or be part of any device capable of processing a sequence of instructions. Processor 310 may include, for example, a processor in a computer processor, a mobile device, or other electronic device and / or a digital processor. The processor 310 may be included in, for example, a smart phone, a wearable device, a tablet, a navigation device, a notebook, a digital broadcast terminal, a PDA, a PMP, Processor 310 may be connected to memory 320 via bus 340.

Memory 320 may include volatile memory, persistent, virtual, or other memory for storing information used by or output by computer system 300. Memory 320 may include, for example, random access memory (RAM) and / or dynamic RAM (DRAM). The memory 320 may be used to store any information, such as the state information of the computer system 300. The memory 320 may also be used to store instructions of the computer system 300, including, for example, instructions for controlling the camera. The computer system 300 may include one or more processors 310 as needed or where appropriate.

The bus 340 may include a communication infrastructure that enables interaction between the various components of the computer system 300. The bus 340 may carry data between components of the computer system 300, for example, between the processor 310 and the memory 320. The bus 340 may comprise a wireless and / or wired communication medium between the components of the computer system 300 and may include parallel, serial, or other topology arrangements.

The persistent storage device 330 may be a component such as a memory or other persistent storage device as used by the computer system 300 to store data for a predetermined extended period of time (e.g., as compared to the memory 320) Lt; / RTI > The persistent storage device 330 may include non-volatile main memory as used by the processor 310 in the computer system 300. The persistent storage device 330 may include, for example, flash memory, hard disk, optical disk, or other computer readable media.

The input / output interface 350 may include a keyboard, a mouse, voice command inputs, a display, or interfaces to other input or output devices. Configuration commands and / or input associated with image correction may be received via input / output interface 350.

The network interface 360 may include one or more interfaces to networks such as a local area network or the Internet. Network interface 360 may include interfaces for wired or wireless connections. The configuration commands may be received via the network interface 360. The information related to the image correction may be received or transmitted via the network interface 360. [

Also, in other embodiments, the computer system 300 may include more components than the components of FIG. However, there is no need to clearly illustrate most prior art components. For example, the computer system 300 may be implemented to include at least some of the input / output devices connected to the input / output interface 350 described above, or may include a transceiver, a Global Positioning System (GPS) module, Databases, and the like. More specifically, when the computer system 300 is implemented in the form of a mobile device such as a smart phone, a camera including a mobile device, an acceleration sensor, a gyro sensor, various physical buttons, a button using a touch panel, An input / output port, a vibrator for vibration, and the like may be further included in the computer system 300.

FIG. 4 is a diagram illustrating an example of components that a processor of a computer system according to an embodiment of the present invention may include; FIG. 5 is a block diagram of an image distortion A flowchart showing an example of a correction method.

4, the processor 310 may include an acquisition unit 401, a calculation unit 402, and a transmission unit 403. [ The components of such processor 310 may be representations of different functions performed by processor 310 in accordance with control instructions provided by at least one program code. For example, the acquiring unit 401 can be used as a functional representation that the processor 310 operates to control the computer system 300 to acquire an image through the camera. The components of the processor 310 and the processor 310 may perform the steps S510 to S580 included in the image distortion correction method of Fig. For example, the components of processor 310 and processor 310 may be implemented to execute instructions in accordance with at least one of the above-described program codes with code of an operating system that memory 320 includes. Here, at least one program code may correspond to a code of a program implemented to process the image distortion correction method.

The image distortion correction method may not occur in the order shown, and some of the steps may be omitted or an additional process may be further included.

In step S510, the processor 310 may load the program code stored in the program file for the image distortion correction method into the memory 320. [ For example, a program file for the image distortion correction method may be stored in the persistent storage device 330 described with reference to FIG. 3, and the processor 310 may receive the program file stored in the persistent storage device 330 The computer system 310 may be controlled such that the program code is loaded into the memory 320. [ At this time, each of the acquisition unit 401, the calculation unit 402, and the transfer unit 403 included in the processor 310 and the processor 310 executes a command of a corresponding part of the program code loaded in the memory 320 And may be different functional representations of processor 310 for executing subsequent steps S520 through S580. For the execution of steps S520 through S580, the components of processor 310 and processor 310 may process an operation according to a direct control command or control computer system 300. [

In step S520, the obtaining unit 401 may execute the camera when the image distortion correction function is executed according to a user's request. The acquiring unit 401 can execute the camera according to a user's request to shoot an image displayed on the projection surface (hereinafter, referred to as a 'projection image') as an image to be subjected to distortion correction on the projection display. The user can bring the personal digital imaging device 200 at his eye level position and capture the projected image with the camera executed through the image distortion correction function.

In step S530, the obtaining unit 401 determines whether or not the projected image is captured in the central area of the camera screen. At this time, the acquiring unit 401 can confirm whether or not the image to be subjected to the distortion correction is located in the central area of the camera screen, for example, by automatically recognizing the subject captured on the camera screen.

The acquiring unit 401 may output a message requesting the position adjustment on the camera screen when the projection image is not captured in the central area of the camera screen as a result of the determination in step S530 in step S540. For example, referring to FIG. 6, a user brings the personal digital imaging device 200 to its eye level position and projects an image displayed on the projection surface 10, that is, a projection image 601, on a projection display. 7, the acquiring unit 401 outputs the position adjustment request message 720 as a voice when the projection image 601 is captured outside the central region 710 of the camera screen 700 Or displayed on the camera screen 700 as an image. The user may move the personal digital imaging device 200 at his / her eye-level position or adjust the camera angle of view or the like in accordance with the position adjustment request message so that the projected image 601 is displayed in the center area of the camera screen 700 (710).

5, in step S550, if the projection image is captured in the central area of the camera screen as a result of the determination in step S530, the obtaining unit 401 stores the camera image in which the projection image is captured, Images can be obtained.

In step S560, the calculation unit 402 can determine whether or not the distortion of the projected image to be distorted is corrected and the degree of distortion in the camera image. At this time, whether or not the degree of distortion of the projected image is less than a predetermined allowable range can do.

If the degree of distortion of the projected image is less than the allowable range as a result of the determination in step S560, the processor 310 determines that image correction is unnecessary and ends the image distortion correction process.

In step S570, when the degree of distortion of the projected image exceeds the allowable range as a result of the determination of step S560, the calculation unit 402 may calculate a correction amount according to the degree of distortion of the projected image. 9, the calculation unit 402 acquires a modified pattern image 901 corresponding to the projection image from the camera image 900 acquired in step S550, and outputs the modified pattern image 901 and the reference pattern The image 902 can be compared to determine whether the projected image is distorted and the degree of distortion of the projected image. Here, a pattern may be generally used as a grid pattern, but the present invention is not limited thereto, and it can be applied to an image of a pattern shape having sufficient precision that can be used for distortion correction, such as a shape for checking a distortion or a repetitive dot shape . If the projected image is not distorted, it can be determined that the projected image is not distorted because the modified pattern image 901 and the reference pattern image 902 coincide with each other within the allowable range. If the projected image is distorted The modified pattern image 901 and the reference pattern image 902 do not coincide with each other as shown in Fig. Therefore, the modified pattern image 901 and the reference pattern image 902 can be compared to determine whether or not the projected image at the user time is distorted and how much it is distorted, and then calculate a correction amount according to the degree of distortion of the projected image . The distortion correction amount may be calculated based on a result of comparing the modified pattern image 901 and the reference pattern image 902. The specific calculation method may be applied to at least one of techniques widely used for distortion correction of the projected image .

5, in step S580, the transmission unit 403 may transmit the distortion correction amount calculated in step S570 to the image correction apparatus related to the projection display for image distortion correction of the projection display. When the image distortion correction function is executed, the transmission unit 403 can be automatically paired with the image correction apparatus. At this time, the transmission unit 403 can be connected to the image correction apparatus through wireless communication such as Bluetooth as well as wired communication. The image correcting device is a module for correcting an image to be projected on a projection display, and may be constituted by a built-in module in a projection display or an independent module capable of interlocking with a projection display, or may be built in a personal digital imaging device . The transmitting unit 403 can transmit the distortion correction amount for the projected image to the paired image correcting device. Accordingly, the image correction apparatus can reflect the amount of distortion correction received from the personal digital imaging device 200 on the image of the projection display, and the projection display can display the image with the distortion corrected on the projection surface. Distortion correction of the projected image can be applied to widely used specific techniques such as keystone correction. 10, a user takes an initial image 601 projected on a projection surface 10 in a projection type display using a personal digital imaging device 200 at his / her eye level position, The image distortion is corrected by reflecting the amount of distortion correction received from the personal digital imaging device 200 on the projection type display and the distortion is corrected on the projection surface 10, An image 1001 can be displayed.

The above steps S530 to S580 may be repeated at least once in order to verify the distortion-corrected image. If it is determined that the degree of distortion of the projected image in the camera image acquired after the image distortion correction is less than the allowable range, The correction process can be terminated.

Accordingly, the camera image captured by the projection image is acquired using the personal digital imaging device 200, and the distortion correction amount of the projection image in the camera image is calculated. Then, the calculated distortion correction amount is transmitted to the projection- can do.

In this embodiment, the distortion correction amount for the projection image is calculated by the personal digital imaging device 200, but the present invention is not limited thereto. For example, in the personal digital video apparatus 200, a projection image at a user's eye level is captured and transmitted to an image correction apparatus, and an image obtained by capturing a projection image from the personal digital video apparatus 200 in the image correction apparatus is acquired It is also possible to directly calculate the distortion correction amount of the projection image through one image.

As described above, according to the embodiments of the present invention, it is possible to easily and easily correct the image distortion of the projection display by using the personal digital imaging device. Further, according to embodiments of the present invention, by measuring the amount of image distortion at the position of the user by using the personal digital video device with respect to the image of the projection display, it is possible to customize the image according to the user's viewpoint, Correction can be made.

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. For example, the apparatus and components described in the embodiments may be implemented as a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA), a programmable logic unit, a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be embodied in any type of machine, component, physical device, computer storage media, or device for interpretation by a processing device or to provide instructions or data to the processing device have. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. At this time, the medium may be a program that continuously stores a computer executable program, or temporarily stores the program for execution or downloading. Further, the medium may be a variety of recording means or storage means in the form of a combination of a single hardware or a plurality of hardware, but is not limited to a medium directly connected to any computer system, but may be dispersed on a network. Examples of the medium include a magnetic medium such as a hard disk, a floppy disk and a magnetic tape, an optical recording medium such as CD-ROM and DVD, a magneto-optical medium such as a floptical disk, And program instructions including ROM, RAM, flash memory, and the like. As another example of the medium, a recording medium or a storage medium that is managed by a site or a server that supplies or distributes an application store or various other software is also enumerated.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

Claims (15)

A method for correcting image distortion in a personal digital imaging apparatus,
Photographing an image displayed on a projection surface projected from a projection type display through a camera of the personal digital imaging device;
Measuring a distortion amount of an image displayed on the projection surface using the photographed image; And
And transmitting the measured distortion amount to an image correction device of the projection display
/ RTI > The method according to claim 1,
Wherein the measuring step comprises:
Determining whether the image displayed on the projection surface is distorted or distorted using the photographed image; And
Calculating a correction amount according to a degree of distortion of an image displayed on the projection surface
/ RTI > 3. The method of claim 2,
Wherein the determining step comprises:
A deformed pattern image corresponding to the image displayed on the projection surface is obtained from the photographed image, and then the deformed pattern image is compared with the reference pattern image to determine whether the image displayed on the projection surface is distorted or distorted Judgment
And correcting the image distortion. The method according to claim 1,
Wherein the measuring step comprises:
Obtaining a modified pattern image corresponding to the image displayed on the projection surface in the photographed image;
Comparing the deformed pattern image with a reference pattern image to determine a degree of distortion of the image displayed on the projection surface; And
Calculating a correction amount according to the degree of distortion based on a result of comparing the deformed pattern image and the reference pattern image
/ RTI > The method according to claim 1,
Wherein when the image distortion correction function is executed in the personal digital imaging device, the image is automatically paired with the image correction device,
The method of claim 1,
Transmitting the distortion amount of the image displayed on the projection surface to the paired image correction device
And correcting the image distortion. The method according to claim 1,
Wherein the image correcting device corrects distortion of an image projected on the projection surface based on the amount of distortion received,
The image distortion correction method includes:
After the transmitting step, the photographing step and the measuring step are repeated to verify the distortion-corrected image
And correcting the image distortion. The method according to claim 1,
Wherein the photographing step comprises:
Acquiring an image to be subjected to distortion correction by storing the camera image when the image displayed on the projection surface is captured in a central region of the camera screen; And
When the image displayed on the projection surface is captured outside the central region of the camera screen, outputting a message requesting the position adjustment to the image by voice or on the camera screen
/ RTI > A method for correcting image distortion in a personal digital imaging apparatus,
Photographing an image displayed on a projection surface projected from a projection type display through a camera of the personal digital imaging device; And
Transmitting the photographed image to an image correction device of the projection display
Lt; / RTI >
The image correction device corrects the image distortion by calculating a correction amount according to the degree of distortion of the image displayed on the projection surface using the received image
And correcting the image distortion. A computer program stored in a computer-readable medium for causing a computer to execute the image distortion correction method according to any one of claims 1 to 8 in combination with a computer. A computer-readable recording medium on which a program for causing a computer to execute the image distortion correction method according to any one of claims 1 to 8 is recorded. A computer-implemented image distortion correction system in a personal digital imaging device,
At least one processor configured to execute computer readable instructions,
Lt; / RTI >
Wherein the at least one processor comprises:
An acquiring unit configured to acquire a camera image of an image displayed on a projection surface projected from a projection display through a camera when the image distortion correction function is executed;
A calculation unit for calculating a distortion amount of an image displayed on the projection surface using the camera image; And
And a transmission unit for transmitting the calculated amount of distortion to the image correction apparatus of the projection-
/ RTI > 12. The method of claim 11,
The calculation unit may calculate,
Acquiring a modified pattern image corresponding to an image displayed on the projection surface in the camera image,
Comparing the deformed pattern image with a reference pattern image to determine a degree of distortion of the image displayed on the projection surface,
Calculating a correction amount according to the degree of distortion based on a result of comparing the deformed pattern image and the reference pattern image
The image distortion correction system comprising: 12. The method of claim 11,
Wherein the transmission unit comprises:
When the image distortion correction function is executed, automatically pairs the personal digital imaging device and the image correction device,
Transmitting the distortion amount of the image displayed on the projection surface to the paired image correction device
The image distortion correction system comprising: 12. The method of claim 11,
Wherein the image correcting device corrects distortion of an image projected on the projection surface based on the amount of distortion,
Wherein the at least one processor comprises:
The image displayed on the projection surface is again photographed to verify the image in which the distortion is corrected
The image distortion correction system comprising: 12. The method of claim 11,
Wherein the obtaining unit comprises:
When the image displayed on the projection surface is captured in a central region of the camera screen, the camera image is stored to acquire an image to be subjected to distortion correction,
When the image displayed on the projection surface is captured outside the central region of the camera screen, a message requesting the position adjustment is outputted as a voice or as an image on the camera screen
The image distortion correction system comprising:

Images