Projection image adjustment method, information processing device, and program

Abstract

To reduces the user's workload when reinstalling a projector in the same location.SOLUTION: A method for adjusting a projection image includes: when a first operation is received, performing a first process including having the projector project a first projection image including a test pattern, acquiring from the projector a geometric correction value obtained by performing geometric correction on the first projection image projected by the projector onto the projection surface, when a marking operation is received to mark an object on the projection surface that is reflected in the first projection image, generating a reference pattern corresponding to the marking operation, and storing the relative positional relationship between the test pattern and the reference pattern and the geometric correction value as a single data set; and when a second operation different from the first operation is received, performing a second process including having the projector project a second projection image including the reference pattern.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a projection image adjustment method, an information processing device, and a program. [Background technology]

[0002] Patent document 1 discloses that an image including a grid pattern is projected as a distortion adjustment pattern image for adjusting distortion of an image projected onto a screen, and that the grid pattern distortion adjustment pattern image is superimposed on a displayed image and projected. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2013-97006 Summary of the Invention [Problem to be solved by the invention]

[0004] According to the above-described conventional technology, the following problem occurs when attempting to display a distortion-free projected image at a specific position on the projection surface. For example, after installing a projector and adjusting the projected image using a distortion adjustment pattern, the relative position between the specific position on the projection surface and the projected image is determined. Consider a scenario in which the projector is then removed and reinstalled on another day. In such a case, simply adjusting the projected image using the distortion adjustment pattern may not be enough to align the relative position between the specific position on the projection surface and the projected image. Furthermore, there is a risk that the user's workload may increase during the projector alignment process. [Means for solving the problem]

[0005] A method for adjusting a projection image according to one embodiment of the present invention includes performing a first process including, when a first operation is received, having a projector project a first projection image including a test pattern; acquiring from the projector a geometric correction value obtained by performing geometric correction on the first projection image projected onto a projection surface by the projector; when a marking operation is received to mark an object on the projection surface that is reflected in the first projection image, generating a reference pattern corresponding to the marking operation; and storing the relative positional relationship between the test pattern and the reference pattern and the geometric correction value as a single data set; and when a second operation different from the first operation is received, performing a second process including having the projector project a second projection image including the reference pattern.

[0006] An information processing device of one embodiment of the present invention includes an input device that accepts input operations, and a control device that executes a first process including: when a first operation is accepted via the input device, causing a projector to project a first projection image including a test pattern; acquiring from the projector a geometric correction value obtained by performing geometric correction on the first projection image projected onto a projection surface by the projector; when a marking operation is accepted to mark an object on the projection surface that is reflected in the first projection image, generating a reference pattern corresponding to the marking operation, and storing the relative positional relationship between the test pattern and the reference pattern and the geometric correction value as a single data set; and when a second operation different from the first operation is accepted via the input device, causing the projector to project a second projection image including the reference pattern.

[0007] A program according to one embodiment of the present invention causes a computer to execute a first process including, when a first operation is received, having a projector project a first projection image including a test pattern; acquiring from the projector a geometric correction value obtained by performing geometric correction on the first projection image projected onto a projection surface by the projector; when a marking operation is received to mark an object on the projection surface that is reflected in the first projection image, generating a reference pattern corresponding to the marking operation; and storing the relative positional relationship between the test pattern and the reference pattern and the geometric correction value as a single data set; and a second process including, when a second operation different from the first operation is received, having the projector project a second projection image including the reference pattern. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a block diagram showing a schematic configuration of an information processing apparatus according to an embodiment of the present invention; [Figure 2] 1A and 1B are diagrams illustrating a state of a projection surface onto which a projection image is projected by a projector. [Figure 3] 10 is a flowchart showing a first process that is executed by the control device when a first operation is received via the input device. [Figure 4] FIG. 10 is a diagram showing an initial state of a first projection image projected onto a wall surface by a projector. [Figure 5] FIG. 10 is a diagram showing a first projected image after geometric correction. [Figure 6] FIG. 10 is a diagram showing a reference pattern generated by the control device when a user makes a marking by drawing a circle around a clock that appears in the first projected image. [Figure 7] 10 is a flowchart showing a second process that is executed by the control device when a second operation is received via the input device. [Figure 8] FIG. 10 is a diagram showing an initial state of a second projection image projected onto a wall surface by a projector. [Figure 9]FIG. 10 is a diagram showing a second projected image after the user has adjusted the position of the clock so that it is positioned inside the reference pattern. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings. In the drawings below, the dimensions of the components may be shown on different scales to make them easier to see.

[0010] 1 is a block diagram showing a schematic configuration of an information processing device 10 according to this embodiment. The information processing device 10 supplies a video signal to a projector 20. For example, the information processing device 10 is a notebook PC (Personal Computer). The projector 20 is, for example, a liquid crystal projector, and projects an image based on the video signal supplied from the information processing device 10. The information processing device 10 includes a communication device 11, a display device 12, an input device 13, a storage device 14, and a control device 15.

[0011] The communication device 11 is a communication interface circuit that controls communication between the control device 15 and the projector 20. The communication device 11 transmits a video signal to the projector 20 via an HDMI (High-Definition Multimedia Interface: registered trademark) cable. The communication device 11 also transmits signals other than the video signal to the projector 20 via a USB (Universal Serial Bus) cable or a wireless LAN (Local Area Network).

[0012] Display device 12 displays an image based on an image signal input from control device 15. For example, display device 12 is a liquid crystal panel or an organic EL (Electro Luminescence) panel. In the following description, in order to distinguish between an image projected onto a projection surface by projector 20 and an image displayed on display device 12, the image projected onto a projection surface by projector 20 will be referred to as a "projected image," and the image displayed on display device 12 will be referred to as a "display image."

[0013] The input device 13 is a device that accepts input operations from a user to the information processing device 10. For example, the input device 13 includes a keyboard and a mouse. The input device 13 outputs a signal corresponding to the operation accepted from the user to the control device 15.

[0014] The storage device 14 includes a nonvolatile memory that stores programs and various setting data required for the control device 15 to execute various processes, and a volatile memory that is used as a temporary storage destination for data when the control device 15 executes various processes. For example, the nonvolatile memory is an EEPROM (Electrically Erasable Programmable Read-Only Memory) or a flash memory. For example, the volatile memory is a RAM (Random Access Memory).

[0015] The control device 15 is an arithmetic processing device that controls the overall operation of the information processing device 10 in accordance with a program stored in the storage device 14. As an example, the control device 15 is configured with one or more processors such as a CPU (Central Processing Unit). Some or all of the functions of the control device 15 may be configured with circuits such as a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), and an FPGA (Field Programmable Gate Array). The control device 15 executes various processes in parallel or sequentially.

[0016] 2 is a diagram showing the state of a projection surface onto which a projection image is projected by the projector 20. The following describes the operation of the information processing device 10, assuming that a projection image including a character image is projected onto a wall surface 110 on which a clock 100 is installed, as shown in FIG.

[0017] After installing the projector 20 so that a projection image is projected onto the wall surface 110 as described above, the user performs a first operation using the input device 13 of the information processing device 10. The first operation is an operation that triggers the control device 15 to execute a first process, which will be described later. The content of the first operation is not particularly limited, and may be, for example, an operation such as clicking a specific icon included in the display image displayed on the display device 12.

[0018] 3 is a flowchart showing a first process that the control device 15 executes when it receives a first operation via the input device 13. The control device 15 executes a program stored in the storage device 14 to execute the first process shown in FIG.

[0019] 3, the control device 15 causes the projector 20 to project a first projection image 140 including the test pattern 120 and the character image 130 (step S1). Specifically, the control device 15 transmits a first video signal indicating the first projection image 140 including the test pattern 120 and the character image 130 to the projector 20 via the communication device 11.

[0020] When the projector 20 receives the first video signal from the information processing device 10, it projects a first projection image 140 based on the first video signal onto the wall surface 110. FIG. 4 is a diagram showing an initial state of the first projection image 140 projected onto the wall surface 110 by the projector 20. As shown in FIG. 4, the first projection image 140 includes a test pattern 120 and a character image 130. For example, the test pattern 120 is a grid pattern. The character image 130 is not particularly limited.

[0021] 4, the first projected image 140 projected onto the wall surface 110 often has distortions such as trapezoidal distortion depending on the installation state of the projector 20. Therefore, the user manually performs geometric correction using a geometric correction function such as a trapezoidal correction function of the projector 20 so that the first projected image 140 projected onto the wall surface 110 becomes a rectangular image. Because the test pattern 120 included in the first projected image 140 is a grid pattern, the user can easily perform geometric correction.

[0022] FIG. 5 is a diagram showing the first projected image 140 after geometric correction. As shown in FIG. 5, the first projected image 140 after geometric correction is a rectangular image. When such geometric correction is completed, the projector 20 stores the geometric correction value obtained by performing the geometric correction in its own memory. The geometric correction value is data for correcting pixel coordinates included in the video signal so that the image projected by the projector 20 onto the wall surface 110 in the future will be a rectangular image.

[0023] As shown in FIG. 3, after executing step S1, the control device 15 acquires the geometric correction value obtained by performing geometric correction on the first projection image 140 projected by the projector 20 from the projector 20 via the communication device 11 (step S2).

[0024] Next, when the control device 15 receives, via the input device 13, a marking operation to mark an object on the wall surface 110 reflected in the first projection image 140, the control device 15 generates a reference pattern 150 corresponding to the marking operation (step S3). For example, after the geometric correction is completed, the user uses the input device 13 of the information processing device 10 to mark the clock 100, which is an object on the wall surface 110 reflected in the first projection image 140 after the geometric correction.

[0025] 6 is a diagram showing a reference pattern 150 generated by the control device 15 when the user makes a marking to surround the clock 100 reflected in the first projection image 140. As shown in FIG. 6, when the user makes a marking to surround the clock 100 reflected in the first projection image 140, the control device 15 generates a circular reference pattern 150 that surrounds the clock 100.

[0026] After generating the reference pattern 150 as described above, the control device 15 stores the relative positional relationship between the test pattern 120 and the reference pattern 150 and the geometric correction value acquired from the projector 20 as one data set in the storage device 14 (step S4). The above is the description of the first process that the control device 15 executes when it receives a first operation via the input device 13.

[0027] Next, assume that after the first process as described above is executed, the user removes the projector 20, and later reinstalls the projector 20 so that a projection image is projected onto the wall surface 110. Then, the user performs a second operation, different from the first operation, using the input device 13 of the information processing device 10. The second operation is an operation that triggers the control device 15 to execute the second process described below. The content of the second operation is not particularly limited, and may be, for example, an operation such as clicking a specific icon included in the display image displayed on the display device 12.

[0028] Fig. 7 is a flowchart showing a second process that the control device 15 executes when it receives a second operation via the input device 13. The control device 15 executes a program stored in the storage device 14 to execute the second process shown in Fig. 7.

[0029] 7, the control device 15 reads out from the storage device 14 the data set stored in the storage device 14 when the first process was executed (step S11). Then, the control device 15 causes the projector 20 to project a second projection image 160 including the test pattern 120, the reference pattern 150, and the character image 130 (step S12). Specifically, the control device 15 transmits a second video signal indicating the second projection image 160 including the test pattern 120, the reference pattern 150, and the character image 130 to the projector 20 via the communication device 11. The control device 15 also transmits the geometric correction value acquired when the first process was executed to the projector 20 via the communication device 11.

[0030] When the projector 20 receives the second video signal from the information processing device 10, it projects a second projection image 160 based on the second video signal onto the wall surface 110. FIG. 8 is a diagram showing an initial state of the second projection image 160 projected onto the wall surface 110 by the projector 20. As shown in FIG. 8, the second projection image 160 includes a test pattern 120, a reference pattern 150, and a character image 130. The color of the reference pattern 150 is different from the color of the area other than the reference pattern 150 among the areas included in the second projection image 160.

[0031] As shown in FIG. 8 , even when the projector 20 is reinstalled, the second projection image 160 projected onto the wall surface 110 often has distortions such as trapezoidal distortion depending on the installation state of the projector 20. For this reason, the projector 20 performs geometric correction processing. The geometric correction processing includes, for example, the steps of the projector 20 acquiring a geometric correction value stored in the storage device 14, the projector 20 generating a signal in which the first projection image 140 has been corrected based on the geometric correction value, and the projector 20 projecting the first projection image 140 after the geometric correction value onto the wall surface 110 based on the signal. Note that a user may manually perform geometric correction using a geometric correction function such as a keystone correction function of the projector 20 so that the first projection image 140 projected onto the wall surface 110 becomes a rectangular image, or the projector 20 may acquire a geometric correction value stored in its own memory.

[0032] Furthermore, when performing geometric correction, the user adjusts the position of the second projected image 160 so that the clock 100 fits inside the circular reference pattern 150. FIG. 9 is a diagram showing the second projected image 160 after the user has adjusted the position so that the clock 100 fits inside the reference pattern 150. As can be understood by comparing FIG. 9 with FIG. 6, by adjusting the position of the second projected image 160 so that the clock 100 fits inside the circular reference pattern 150, even if the projector 20 is reinstalled, it is possible to restore the state of the projector 20 when it was initially installed. This reduces the workload of the user when aligning the projector 20 when the projector 20 is reinstalled.

[0033] (Effects of this embodiment) The projection image adjustment method of this embodiment is realized by the control device 15 of the information processing device 10 executing the first process and second process described above. That is, the projection image adjustment method of this embodiment includes performing a first process including, when a first operation is received, having the projector 20 project a first projection image 140 including the test pattern 120, and acquiring from the projector 20 a geometric correction value obtained by performing geometric correction on the first projection image 140 projected by the projector 20 onto the wall surface 110, and, when a marking operation of marking an object on the wall surface 110 reflected in the first projection image 140 is received, generating a reference pattern 150 corresponding to the marking operation, and storing the relative positional relationship between the test pattern 120 and the reference pattern 150 and the geometric correction value as one data set; and performing a second process including, when a second operation different from the first operation is received, having the projector 20 project a second projection image 160 including the reference pattern 150. According to the present embodiment as described above, when adjusting the position of the second projection image 160 projected onto the wall surface 110 after performing the second operation, the user can restore the state of the projector 20 when it was first installed even when the projector 20 is reinstalled by adjusting the position so that the position of the reference pattern 150 included in the second projection image 160 matches the position of the object on the wall surface 110 reflected in the second projection image 160. This makes it possible to reduce the workload of the user when adjusting the position of the projector 20 when the projector 20 is reinstalled.

[0034] In the method for adjusting a projection image of this embodiment, the second projection image 160 includes the test pattern 120 in addition to the reference pattern 150. According to this embodiment, the user can more easily perform geometric correction and alignment of the second projected image 160.

[0035] In the projection image adjustment method of this embodiment, the test pattern 120 is a grid pattern. According to this embodiment, the user can more easily perform geometric correction on the first projected image 140 and the second projected image 160.

[0036] In the method for adjusting a projection image of this embodiment, the color of the reference pattern 150 is different from the color of the area other than the reference pattern 150 among the areas included in the second projection image 160. According to this embodiment, the reference pattern 150 is more easily visible to the user, and the geometric correction and alignment of the second projected image 160 can be more easily performed.

[0037] The information processing device 10 of this embodiment includes an input device 13 that accepts input operations, and a control device 15 that executes a first process including, when a first operation is accepted via the input device 13, causing the projector 20 to project a first projection image 140 including a test pattern 120, acquiring from the projector 20 a geometric correction value obtained by performing geometric correction on the first projection image 140 projected onto a wall surface 110 by the projector 20, and, when a marking operation to mark an object on the wall surface 110 that is reflected in the first projection image 140 is accepted, generating a reference pattern 150 corresponding to the marking operation, and storing the relative positional relationship between the test pattern 120 and the reference pattern 150 and the geometric correction value as a single data set; and a second process including, when a second operation different from the first operation is accepted via the input device 13, causing the projector 20 to project a second projection image 160 including the reference pattern 150. According to the information processing device 10 of the present embodiment as described above, when adjusting the position of the second projection image 160 projected onto the wall surface 110 after performing the second operation, the user can restore the state of the projector 20 when it was initially installed even when the projector 20 is reinstalled by adjusting the position so that the position of the reference pattern 150 included in the second projection image 160 matches the position of the object on the wall surface 110 reflected in the second projection image 160. This can reduce the workload of the user when adjusting the position of the projector 20 when the projector 20 is reinstalled.

[0038] The program of the present embodiment causes a computer to execute a first process including, when a first operation is received, causing the projector 20 to project a first projection image 140 including a test pattern 120, acquiring from the projector 20 a geometric correction value obtained by performing geometric correction on the first projection image 140 projected by the projector 20 onto the wall surface 110, and, when a marking operation of marking an object on the wall surface 110 reflected in the first projection image 140 is received, generating a reference pattern 150 corresponding to the marking operation and storing the relative positional relationship between the test pattern 120 and the reference pattern 150 and the geometric correction value as one data set; and a second process including, when a second operation different from the first operation is received, causing the projector 20 to project a second projection image 160 including the reference pattern 150. In the present embodiment, the control device 15 is an example of a computer. According to the program of this embodiment as described above, when adjusting the position of the second projection image 160 projected onto the wall surface 110 after performing the second operation, the user can restore the state of the projector 20 when it was first installed even when the projector 20 is reinstalled by adjusting the position so that the position of the reference pattern 150 included in the second projection image 160 matches the position of the object on the wall surface 110 reflected in the second projection image 160. This makes it possible to reduce the workload of the user when adjusting the position of the projector 20 when the projector 20 is reinstalled.

[0039] The technical scope of the present disclosure is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present disclosure.

[0040] For example, in the above embodiment, a grid pattern is exemplified as the test pattern 120, but the test pattern of the present disclosure is not limited to a grid pattern. For example, a pattern in which multiple crosshairs are arranged vertically and horizontally at a predetermined interval may be used as the test pattern.

[0041] In step S1 of the present embodiment, the user manually performs geometric correction using a geometric correction function such as a keystone correction function of the projector 20, but the projector 20 may execute the geometric correction process. The geometric correction process includes, for example, the steps of the projector 20 acquiring imaging data of the first projection image 140 projected onto the wall surface 110, the projector 20 generating a geometric correction value based on the imaging data, the projector 20 generating a signal in which the first projection image 140 has been corrected based on the geometric correction value, and the projector 20 projecting the first projection image 140 after the geometric correction value onto the wall surface 110 based on the signal.

[0042] Summary of the Disclosure A summary of this disclosure is provided below.

[0043] (Supplementary Note 1) A method for adjusting a projection image, comprising: performing a first process including, when a first operation is received, having a projector project a first projection image including a test pattern; acquiring from the projector a geometric correction value obtained by performing geometric correction on the first projection image projected onto a projection surface by the projector; when a marking operation is received to mark an object on the projection surface that is reflected in the first projection image, generating a reference pattern corresponding to the marking operation; and storing the relative positional relationship between the test pattern and the reference pattern and the geometric correction value as a single data set; and when a second operation different from the first operation is received, performing a second process including, when a second operation different from the first operation is received, having the projector project a second projection image including the reference pattern.

[0044] According to the projection image adjustment method described in Supplementary Note 1, when adjusting the position of the second projection image projected onto the projection surface after performing the second operation, the user can restore the state of the projector when it was initially installed even when the projector is reinstalled by adjusting the position so that the position of the reference pattern included in the second projection image matches the position of the object on the projection surface reflected in the second projection image. This reduces the workload of the user when adjusting the position of the projector when the projector is reinstalled.

[0045] (Supplementary Note 2) The method for adjusting a projection image according to Supplementary Note 1, wherein the second projection image includes the test pattern in addition to the reference pattern.

[0046] According to the method for adjusting a projection image described in Supplementary Note 2, the user can more easily perform geometric correction and alignment of the second projection image.

[0047] (Supplementary Note 3) The method for adjusting a projection image according to Supplementary Note 1 or 2, wherein the test pattern is a grid pattern.

[0048] According to the projection image adjustment method described in Supplementary Note 3, the user can more easily perform geometric correction of the first projection image and the second projection image.

[0049] (Supplementary Note 4) The method for adjusting a projection image according to any one of Supplementary Notes 1 to 3, wherein the color of the reference pattern is different from the color of an area other than the reference pattern among areas included in the second projection image.

[0050] According to the method for adjusting a projected image described in Supplementary Note 4, the user can easily visually recognize the reference pattern, and therefore can more easily perform geometric correction and alignment of the second projected image.

[0051] (Supplementary Note 5) An information processing device comprising: an input device that accepts input operations; and a control device that executes a first process including: when a first operation is accepted via the input device, having a projector project a first projection image including a test pattern; acquiring from the projector a geometric correction value obtained by performing geometric correction on the first projection image projected onto a projection surface by the projector; when a marking operation is accepted to mark an object on the projection surface that is reflected in the first projection image, generating a reference pattern corresponding to the marking operation; and storing a relative positional relationship between the test pattern and the reference pattern and the geometric correction value as one data set; and a second process including: when a second operation different from the first operation is accepted via the input device, having the projector project a second projection image including the reference pattern.

[0052] According to the information processing device described in Supplementary Note 5, when adjusting the position of the second projection image projected onto the projection surface after performing the second operation, the user can restore the state of the projector when it was initially installed even when the projector is reinstalled by adjusting the position so that the position of the reference pattern included in the second projection image matches the position of the object on the projection surface reflected in the second projection image. This reduces the workload of the user when aligning the projector when the projector is reinstalled.

[0053] (Appendix 6) A program that causes a computer to execute a first process including: when a first operation is received, causing a projector to project a first projection image including a test pattern; acquiring from the projector a geometric correction value obtained by performing geometric correction on the first projection image projected onto a projection surface by the projector; when a marking operation is received to mark an object on the projection surface that is reflected in the first projection image, generating a reference pattern corresponding to the marking operation; and storing the relative positional relationship between the test pattern and the reference pattern and the geometric correction value as a single data set; and when a second operation different from the first operation is received, causing the projector to project a second projection image including the reference pattern.

[0054] According to the program described in Supplementary Note 6, when adjusting the position of the second projection image projected onto the projection surface after performing the second operation, the user can restore the state of the projector when it was initially installed even when the projector is reinstalled by adjusting the position so that the position of the reference pattern included in the second projection image matches the position of the object on the projection surface reflected in the second projection image. This reduces the workload of the user when adjusting the position of the projector when the projector is reinstalled. [Explanation of symbols]

[0055] 10...information processing device, 20...projector, 11...communication device, 12...display device, 13...input device, 14...storage device, 15...control device

Claims

1. When the first operation is received, causing the projector to project a first projection image including a test pattern; acquiring, from the projector, a geometric correction value obtained by performing geometric correction on the first projection image projected onto a projection surface by the projector; When a marking operation for marking an object on the projection surface that is reflected in the first projected image is received, generating a reference pattern corresponding to the marking operation; storing the relative positional relationship between the test pattern and the reference pattern and the geometric correction value as one data set; performing a first process including: performing a second process including, when a second operation different from the first operation is received, causing the projector to project a second projection image including the reference pattern; A method for adjusting a projected image, including:

2. The method for adjusting a projected image according to claim 1 , wherein the second projected image includes the test pattern in addition to the reference pattern.

3. The method for adjusting a projected image according to claim 1 , wherein the test pattern is a grid pattern.

4. The method for adjusting a projection image according to claim 1 , wherein the color of the reference pattern is different from the color of an area other than the reference pattern that is included in the second projection image.

5. an input device that accepts input operations; When a first operation is received via the input device, causing the projector to project a first projection image including a test pattern; acquiring, from the projector, a geometric correction value obtained by performing geometric correction on the first projection image projected onto a projection surface by the projector; When a marking operation for marking an object on the projection surface that is reflected in the first projected image is received, generating a reference pattern corresponding to the marking operation; storing the relative positional relationship between the test pattern and the reference pattern and the geometric correction value as one data set; a first process including: a second process including, when a second operation different from the first operation is received via the input device, causing the projector to project a second projection image including the reference pattern; a control device that executes the An information processing device comprising:

6. When the first operation is received, causing the projector to project a first projection image including a test pattern; acquiring, from the projector, a geometric correction value obtained by performing geometric correction on the first projection image projected onto a projection surface by the projector; When a marking operation for marking an object on the projection surface that is reflected in the first projected image is received, generating a reference pattern corresponding to the marking operation; storing the relative positional relationship between the test pattern and the reference pattern and the geometric correction value as one data set; a first process including: a second process including, when a second operation different from the first operation is received, causing the projector to project a second projection image including the reference pattern; A program that causes a computer to execute the following.

Images