Image processing method, recording medium, and projector

Abstract

The present application provides an image processing method, a recording medium and a projector, which can easily correct uneven brightness. An image processing method of a projector (1) or a portable terminal device (5) which displays an image modulated by a liquid crystal light valve (23), comprising: displaying an image (D1); displaying an adjustment bar (B3) or an adjustment bar (SB3) corresponding to a first brightness at a first position of the image (D1); moving the adjustment bar (B3) or the adjustment bar (SB3) from the first position to a second position along a first axis of the image (D1); and generating an image (D2) as a second image having a range corresponding to the second position of the image (D1) and intersecting the first axis, and having the first brightness.

Description

TECHNICAL FIELD

[0001] The present application relates to an image processing method, a recording medium, and a projector. BACKGROUND

[0002] As a method of correcting unevenness in brightness of a projection-type image display device, in Patent Literature 1, the following is described: nine pattern images in which regions to be adjusted in brightness in an image are patterned are prepared in advance, and when correcting unevenness in brightness, the nine pattern images are OSD-displayed, and the brightness of the image is adjusted with respect to the region to be adjusted corresponding to the pattern image selected by the user.

[0003] In addition, the nine pattern images are pattern images indicating a top-left region, a left region, a bottom-left region, a top-right region, a right region, a bottom-right region, a top region, a bottom region, and an entire region of the image.

[0004] Patent Literature 1: Japanese Patent Application Publication No. 2014-71444

[0005] In a case where a projection-type image display device is set to project an image, due to influences of the material, the unevenness, the color tone of a wall or a column, illumination light from other lighting fixtures, external light, or the projection angle, the projection range, or the like, unevenness in brightness of various patterns occurs in the projected image, and thus it is difficult to pattern the region to be adjusted. Therefore, it is desirable to develop a new method of correcting unevenness in brightness that can correct unevenness in brightness of various patterns even without preparing pattern images corresponding to the unevenness in brightness in advance. SUMMARY

[0006] An image processing method of one embodiment of the present application includes displaying a first image, displaying a first correction point corresponding to a first brightness at a first position of the first image, moving the first correction point from the first position to a second position along a first axis of the first image, and generating a second image in which a range including a position corresponding to the second position and intersecting the first axis has the first brightness.

[0007] A recording medium of one embodiment of the present application records a program that causes an image display device to perform processing of displaying a first image, displaying a first correction point corresponding to a first brightness at a first position of the first image, moving the first correction point from the first position to a second position along a first axis of the first image, and generating a second image in which a range including a position corresponding to the second position and intersecting the first axis has the first brightness.

[0008] A projector of one embodiment of the present application includes an optical device and a processor. The processor performs the following processing: displaying a first image on a projection screen using the optical device; displaying a first correction point corresponding to a first luminance at a first position of the first image using the optical device; moving the first correction point from the first position to a second position along a first axis of the first image; and generating a second image whose luminance in a range including a position corresponding to the second position and intersecting the first axis is the first luminance. BRIEF DESCRIPTION OF DRAWINGS

[0009] Figure 1 FIG. 1 is a block diagram illustrating the schematic structure of a projector.

[0010] Figure 2A FIG. 2 is an explanatory diagram of a setting example of the projector.

[0011] Figure 2B FIG. 3 is an explanatory diagram of a setting example of the projector.

[0012] Figure 2C FIG. 4 is an explanatory diagram of a setting example of the projector.

[0013] Figure 3 FIG. 5 is a flow chart illustrating the sequence of luminance unevenness correction.

[0014] Figure 4A FIG. 6 is an explanatory diagram of an operation screen at the time of luminance unevenness correction.

[0015] Figure 4B FIG. 7 is an explanatory diagram of a projection screen at the time of luminance unevenness correction.

[0016] Figure 5A FIG. 8 is an explanatory diagram of an operation screen at the time of luminance unevenness correction.

[0017] Figure 5B FIG. 9 is an explanatory diagram of a projection screen at the time of luminance unevenness correction.

[0018] Figure 6A FIG. 10 is an explanatory diagram of an operation screen at the time of luminance unevenness correction.

[0019] Figure 6B FIG. 11 is an explanatory diagram of a projection screen at the time of luminance unevenness correction.

[0020] Figure 7 FIG. 12 is an explanatory diagram of a projection screen at the time of luminance unevenness correction.

[0021] Figure 8A FIG. 13 is an explanatory diagram of an operation screen at the time of luminance unevenness correction.

[0022] Figure 8B FIG. 14 is an explanatory diagram of a projection screen at the time of luminance unevenness correction.

[0023] Figure 9A FIG. 6 is an explanatory view of an operation screen at the time of the brightness unevenness correction.

[0024] Figure 9B FIG. 7 is an explanatory view of a projection screen at the time of the brightness unevenness correction.

[0025] Figure 10 FIG. 8 is an explanatory view of a projection screen at the time of the brightness unevenness correction.

[0026] Figure 11A FIG. 9 is an explanatory view of an operation screen at the time of the brightness unevenness correction.

[0027] Figure 11B FIG. 10 is an explanatory view of a projection screen at the time of the brightness unevenness correction.

[0028] Figure 12 FIG. 11 is an explanatory view of a projection screen at the time of the brightness unevenness correction.

[0029] Figure 13 FIG. 12 is a block diagram showing a schematic configuration of a portable terminal device.

[0030] Explanation of Reference Numerals

[0031] 1, 1A: projector; 2: external device; 3: external storage medium; 5: portable terminal device; 10: processor; 11: signal input section; 12: image processing section; 121: brightness correction section; 13: OSD processing section; 14: image information output section; 16: input section; 161: operation remote controller; 18: control section; 19: storage section; 20: optical device; 21: light source section; 22: light source drive section; 23, 23B, 23G, 23R: liquid crystal light valve; 24: light valve drive section; 25: projection lens; 26: image input section; 27: image processing section; 28: control section; 29: storage section; 31: cover member; 32: projection port; 33: speaker; 51: signal input section; 52: image processing section; 521: brightness correction section; 53: OSD processing section; 54: image information output section; 56: input section; 58: control section; 59: storage section; B1, B2, B3, B4, B5, B6: adjustment bar; SB1, SB2, SB3, SB4, SB5, SB6: adjustment bar; D1, D1a, D2: image; F1, F2, F3, F4, F5, F6: brightness setting frame; SF1, SF2, SF3, SF4, SF5, SF6: brightness setting frame; SD1, SD1a, SD2: projection screen; SC: screen. DETAILED DESCRIPTION

[0032] Hereinafter, an embodiment of the present application will be described with reference to the drawings.

[0033] In the drawings, the dimensions of the components are sometimes made different from the actual dimensions in order to make the components identifiable to the extent possible.

[0034] In addition, in the drawings, an X axis, a Y axis, and a Z axis orthogonal to each other are appropriately labeled, the direction along the X axis is set as an X direction, the direction along the Y axis is set as a Y direction, and the direction along the Z axis is set as a Z direction. In addition, one of the directions along the Y direction is sometimes referred to as an upper side, and the other is sometimes referred to as a lower side. In addition, one of the directions along the X direction is sometimes referred to as a left side, and the other is sometimes referred to as a right side.

[0035] 1. Embodiment 1

[0036] 1.1. Outline structure of image display device

[0037] Reference Figure 1 An outline structure of a projector 1 as an image display device will be described. Figure 1 is a block diagram showing an outline structure of the projector of Embodiment 1.

[0038] The projector 1 includes a processor 10 and an optical device 20.

[0039] The processor 10 has a signal input section 11, an image processing section 12, a brightness correction section 121, an OSD processing section 13, an image information output section 14, an input section 16, and a control section 18 that controls each section, a storage section 19 that stores a control program including a brightness unevenness correction program, a control program, and image information such as content images, and the like, as functional blocks. Furthermore, the processor 10 includes one or a plurality of processors such as a CPU (Central Processing Unit). Furthermore, a part or all of the processor 10 can be realized by hardware such as an SOC (System on a chip), a DSP (Digital Signal Processor), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), and the like.

[0040] The optical device 20 has a light source section 21 such as a laser light source, a light source drive section 22, a liquid crystal light valve 23 as a light modulation device, a light valve drive section 24, and a projection lens 25. In addition, the light source drive section 22 and the light valve drive section 24 can be included in the structure of the processor 10, or can be mounted to the liquid crystal light valve 23 using a COF (Chip on Film), a COG (Chip on glass), CG silicon (Continuous Grain Silicon), or the like.

[0041] The signal input section 11 receives input of image information from an external device 2 such as a personal computer or a DVD player, an external storage medium 3 such as a USB memory, or an external server connected via an Internet line (not shown), and outputs the image information to the image processing section 12.

[0042] The image processing section 12 performs predetermined image processing based on an image processing program on the image information, and outputs the image information to the image information output section 14. As the predetermined image processing, there are included brightness unevenness correction, resolution conversion, sharpness adjustment, and the like. In addition, the image information can be processed by either of a digital signal or an analog signal.

[0043] The brightness correction section 121 corrects the brightness of the image information based on brightness correction information in the image processing section 12. In addition, the brightness of the image information is corrected based on a brightness unevenness correction program, and information used for the correction is stored in the storage section 19 as the brightness correction information.

[0044] The OSD processing section 13 outputs OSD image information as a menu image or a message image superimposed on the image information processed by the image processing section 12 based on an instruction from the control section 18. The OSD image information is stored in an internal memory or the storage section 19.

[0045] The image information output section 14 outputs the image information and the OSD image information to the optical device 20.

[0046] The input section 16 receives an input operation from a user. In the present embodiment, the input section 16 includes an operation remote controller 161 capable of remote operation.

[0047] The operation remote controller 161 is provided with a plurality of operation keys for performing various instructions, and a screen D for displaying image information corresponding to the operation content. The screen D displays a first image used when the brightness of the image information is corrected based on a brightness unevenness correction program. The image information of the first image can be stored in an internal memory of the operation remote controller 161, or can be provided to the operation remote controller 161 from the image information output section 14 via the input section 16.

[0048] When the user operates the operation remote controller 161, the input section 16 outputs an operation signal corresponding to the operation content of the user to the control section 18.

[0049] The control section 18 is a central processing device that performs various arithmetic processing, and controls the projector 1 as a whole.

[0050] The storage section 19 is configured from a ROM (Read Only Memory) and a RAM (Random Access Memory) and the like. The ROM stores a control program including the luminance unevenness correction program, control data used by each control program, and the like. In addition, the control data includes the first image used by the luminance unevenness correction program, the brightness correction information set by the luminance unevenness correction program, and the like. The RAM is used as a work area when various arithmetic processing is performed. Furthermore, the control program including the luminance unevenness correction program and the control data are saved in an external server, and can be downloaded via an Internet line or the like in a timely manner.

[0051] The optical device 20 projects an image based on the image information input from the image information output section 14 to the screen SC. In the present embodiment, a wall, a column, or the like is used as the screen SC.

[0052] The light of red (R) among the light emitted from the light source section 21 is incident to the liquid crystal light valve 23R for red, the light of green is incident to the liquid crystal light valve 23G for green, and the light of blue is incident to the liquid crystal light valve 23B for blue.

[0053] The light source drive section 22 controls the supply and stop of power to the light source section 21, and switches the lighting and extinguishing of the light source section 21, based on an instruction from the control section 18.

[0054] The liquid crystal light valve 23 is a transmissive liquid crystal panel. Furthermore, the liquid crystal light valve 23 can also be a reflective liquid crystal panel, a liquid crystal on silicon (LCOS) liquid crystal panel, or a light modulation panel other than a liquid crystal panel, such as a DMD (Digital Micro mirror Device).

[0055] The light valve drive section 24 sets the light transmittance of each pixel of the liquid crystal light valve 23 by applying a drive voltage corresponding to the image information to each pixel of the liquid crystal light valve 23.

[0056] The light modulated by the liquid crystal light valves 23R, 23G, 23B is synthesized by a dichroic prism not shown, and is projected to a wall, a column, via a projection lens 25.

[0057] 1.2. Setting example of projector

[0058] Reference Figure 2A , Figure 2B and Figure 2C A setting example of the projector 1 will be described. Figure 2A , Figure 2B and Figure 2C are explanatory diagrams each showing a setting example of a projector.

[0059] In recent years, various usage methods have been studied in various places with respect to a projection-type image display apparatus. For example, there is a usage method in which a projection-type image display apparatus is disposed on a ceiling of a reception area, a passageway, a guest room, a living room, an entrance, or the like, and an image that feels natural to a wall, a column, or the like is projected, thereby expressing a space that feels an open feeling like a space connected to an external space, a space in which a mood change is easily made, a space in which a person is relaxed, or the like. In such a use, for example, as shown in Figure 2A The projector 1 is disposed on a ceiling of a wall side. The projector 1 projects an image to a wall as a screen SC. As shown in Figure 2B The image projected from the projector 1 is projected to a range from a vicinity of the ceiling of the wall to a floor. A projection picture SD indicates an image projected to the wall.

[0060] The projection picture SD is in a shape of a trapezoid that is longer in the up-down direction of the wall. Further, in the present embodiment, a direction of a long side of the projection picture SD, that is, a direction along the up-down direction of the wall is set as a Y direction along a Y axis that is a first axis.

[0061] The shape of the projection picture SD can be set to a rectangular shape, a barrel shape, a spindle shape, an elliptical shape, or the like by using a shape correction function, a trimming function, or the like. In addition, the projection picture SD can be projected in a shape of projection light of the projector 1 without using the shape correction function, the trimming function, or the like. That is, in a case where the projection light of the projector 1 is an elliptical shape, the shape of the projection picture SD is also an elliptical shape.

[0062] As shown in Figure 2C The projector 1 is embedded in the ceiling, for example, in a state covered by a cover member 31. The cover member 31 has a projection port 32 in which a peephole of a projection lens 25 is provided and a speaker 33.

[0063] 1.3. Method of brightness unevenness correction

[0064] Next, a specific example of a brightness unevenness correction method as the image processing method of the present embodiment will be described with reference to Figures 3 to 12

[0065] Figure 3 is a flowchart indicating a sequence of the brightness unevenness correction. Figure 4A Figure 5A Figure 6A Figure 8A Figure 9A and Figure 11A are explanatory diagrams that explain operation screens in which the brightness unevenness correction is performed in Adjustment Example 1 to Adjustment Example 4. Figure 4B Figure 5B Figure 6B Figure 7 Figure 8B Figure 9B Figure 10 ​​​​​​​​​​​、 Figure 11B and Figure 12 is an explanatory view illustrating a projection screen on which the brightness unevenness correction is performed in Adjustment Example 1 to Adjustment Example 4.

[0066] As shown in Figure 3 , in Step S1, the projector 1 projects an image onto a wall.

[0067] In a case where the brightness unevenness correction is performed, the user operates the remote controller 161 to select a brightness unevenness correction menu.

[0068] In Step S2, the control section 18 determines whether or not the selection of the brightness unevenness correction menu is made. In a case where it is determined that the selection of the brightness unevenness correction menu is made (Step S2 / Yes), the control section 18 executes the brightness unevenness correction program stored in the storage section 19. The brightness unevenness correction program is a program for executing the image processing method of the present embodiment. In a case where it is determined that the selection of the brightness unevenness correction menu is not made (Step S2 / No), the control section 18 ends the brightness unevenness correction.

[0069] 1.3.1. Adjustment Example 1

[0070] The brightness unevenness correction of Adjustment Example 1 will be described with reference to Figure 3 and Figures 4A to 6B .

[0071] In Step S3, based on the brightness unevenness correction program, a bright level setting screen is displayed.

[0072] Figure 4A An operation screen example as the bright level setting screen displayed in the screen D in which the remote controller 161 is operated is shown. In the screen D, an image D1 of a full-screen white for brightness correction as a first image is displayed. Further, the image D1 can be directly used as the image displayed in Step S1, but if the ease of correction is taken into consideration, it is preferable to use a full-screen white for brightness correction.

[0073] In the screen D, adjustment bars B1, B2 and bright level setting frames F1, F2 are displayed. The adjustment bar B1 is displayed along the upper side of the image D1, and the adjustment bar B2 is displayed along the lower side of the image D1.

[0074] The bright level setting frame F1 is displayed on the left side of the adjustment bar B1, and the bright level setting frame F2 is displayed on the left side of the adjustment bar B2. In the bright level setting frame F1, the bright level information of the upper side of the image D1 in which the adjustment bar B1 is present in the image D1 is displayed, and in the bright level setting frame F2, the bright level information of the lower side of the image D1 in which the adjustment bar B2 is present in the image D1 is displayed. In Figure 4A , 100% indicating white is displayed in the bright level setting frames F1, F2.

[0075] Figure 4B The projection screen SD1 is shown projected onto a wall by projector 1. The projection screen SD1 is an image that projects a full-screen white image D1 as a first image for brightness correction. In adjustment example 1, a pattern of uneven brightness is generated in the projection screen SD1, where the upper side, which is the ceiling side, appears bright, and the lower side, which is the floor side, appears dark.

[0076] Additionally, in the projected screen SD1, adjustment bars SB1 and SB2, and brightness setting frames SF1 and SF2 are overlaid on the screen by the OSD processing unit 13. Adjustment bar SB1 corresponds to adjustment bar B1 displayed on the screen D of the remote control 161, and adjustment bar SB2 corresponds to adjustment bar B2. Brightness setting frames SF1 and SF2 display the same brightness information as that displayed in brightness setting frames F1 and F2 on the screen D of the remote control 161.

[0077] Users observed Figure 4B The projected image SD1 shown is being adjusted to eliminate uneven brightness.

[0078] In Example 1, the lower side of the projected image SD1 is darker than the upper side. In this case, the user adjusts the brightness of the projected image SD1 based on the brightness of the lower side, or in other words, the mid-gray level corresponding to the brightness of the lower side, to make the brightness of the projected image SD1 more uniform. Specifically, the user changes the brightness information of the brightness setting boxes F1 and F2.

[0079] like Figure 5A As shown, the user operates the remote control 161 to change the brightness information of the brightness setting box F1 from 100% to 60%. The brightness information can be changed to any value between 100% (corresponding to white) and 0% (corresponding to black).

[0080] The user inputs a percentage corresponding to the mid-gray level used as a baseline for brightness. As mentioned above, in Figure 4B In the projected image SD1 shown, since the brightness at the bottom is used as a reference, the user keeps the brightness information of the brightness setting box F2 at 100% and sets the brightness information of the brightness setting box F1 to 60% corresponding to the brightness at the bottom.

[0081] In step S4, the control unit 18 determines whether the user has entered a change to the brightness information. If it is determined that a change to the brightness information has been entered (step S4 / Yes), the control unit 18 executes step S5. If it is determined that the user has not entered a change to the brightness information (step S4 / No), the control unit 18 skips step S5.

[0082] In step S5, processing based on the brightness information changed by the user is executed.

[0083] As Figure 5A shown, in a case where the brightness information of the brightness setting frame Fl is changed from 100% to 60%, the brightness of the image Dl in the range overlapping with the adjustment bar Bl is changed to the intermediate gray corresponding to 60%. Also, an image Dla in which the brightness between the adjustment bar Bl and the adjustment bar B2 is linearly interpolated between 60% and 100% is generated and displayed. The generation of the image Dla is performed by the brightness correction section 121, but the generation of the image Dla can also be configured to be performed by an internal processor of the operation remote controller 161 by operating the operation remote controller 161.

[0084] The image Dla is projected by the projector 1.

[0085] Figure 5B A projection screen SDla projected by the projector 1 based on the image Dla is shown. In the projection screen SDla, the brightness of the upper side and the lower side appears to be substantially the same, but the brightness of the vicinity of the center appears to be darker than the upper side and the lower side.

[0086] The user observes the projection screen SDla and further performs the brightness unevenness correction. In this case, the user operates the operation remote controller 161, and the adjustment bar B3 is displayed. The first correction point of the present embodiment is at least one point included in the adjustment bar B3.

[0087] In step S6, the control section 18 determines whether or not the user has performed the display instruction of the adjustment bar B3. In a case where it is determined that the display instruction of the adjustment bar B3 has been performed (step S6 / YES), the control section 18 executes step S7. In a case where it is determined that the user has not performed the display instruction of the adjustment bar B3 (step S6 / NO), the brightness unevenness correction is ended.

[0088] In step S7, the control section 18 displays the adjustment bar B3 based on the display instruction of the adjustment bar B3.

[0089] As Figure 6A shown, the adjustment bar B3 is displayed on the screen D of the operation remote controller 161. The adjustment bar B3 is initially displayed at a position indicated by a broken line including the first position. The adjustment bar B3 is a line that crosses the images Dl, Dla, D2 in the X direction. In the present embodiment, the adjustment bar B3 is displayed at a position intermediate the adjustment bar Bl and the adjustment bar B2, but the position at which the adjustment bar B3 is displayed can also be a position specified by the user. Also, the first position can include at least the Y coordinate in the images Dl, Dla, D2.

[0090] As Figure 6AAs shown, the brightness setting frame F3 is displayed on the left side of the adjustment bar B3. Initially, the brightness corresponding to the position of the adjustment bar B3 shown by the dotted line is automatically displayed in the brightness setting frame F3. Since the adjustment bar B3 is displayed at a position intermediate between the adjustment bar B1 and the adjustment bar B2, 80% which is intermediate between 60% and 100% is displayed in the brightness setting frame F3.

[0091] The user operates the remote controller 161 to move the position of the adjustment bar B3 in the Y direction. In the present embodiment, the position shown by the solid line is moved to as a second position. Further, the second position includes at least the Y coordinate in the images D1, D1a, D2.

[0092] In step S8, the control section 18 moves the display position of the adjustment bar B3 based on the operation of the user.

[0093] In Figure 6A The adjustment bar B3 shown by the solid line indicates the adjustment bar B3 after the movement. Even if the adjustment bar B3 is moved, the brightness information displayed in the brightness setting frame F3 does not automatically change. In other words, the position of the brightness 80% moves with the movement of the adjustment bar B3. Further, in step S7 and step S8, the value of the brightness setting frame F3 displayed in correspondence with the adjustment bar B3 can also be changed.

[0094] In step S9, the control section 18 generates and displays the image D2 which is the second image in which the brightness of the image D1a is changed based on the position of the adjustment bar B3 after the movement.

[0095] The brightness correction section 121 generates the image D2 in which, in the image D1a, the brightness of the range overlapping the adjustment bar B3 is changed to the intermediate gray corresponding to the value of the brightness setting frame F3, 80%, and the brightness between the adjustment bar B1 and the adjustment bar B3 is changed to a value interpolated linearly between 60% and 80%, and the brightness between the adjustment bar B3 and the adjustment bar B2 is changed to a value interpolated linearly between 80% and 100%. Alternatively, an approximation curve can be used to interpolate between the adjustment bar B1 and the adjustment bar B2. By using the approximation curve, the brightness can be smoothly changed before and after the adjustment bar B3.

[0096] The image D2 is projected by the projector 1. Figure 6B A projection screen SD2 projected by the projector 1 based on the image D2 is shown. In the projection screen SD2, the brightness unevenness between the upper side and the lower side is substantially eliminated, and a projection image in which the brightness is the same degree throughout the surface is obtained.

[0097] The user operates the remote controller 161 to end the brightness unevenness correction.

[0098] Further, the brightness information set in the brightness setting frame F1, F2, F3 and the brightness setting frame SF1, SF2, SF3 by the brightness unevenness correction is stored in the storage section 19 as the brightness correction information together with the position information of the adjustment bar B1, B2, B3 and the adjustment bar SB1, SB2, SB3, and the brightness correction section 121 performs image processing based on the stored brightness correction information.

[0099] Further, in the present embodiment, an example in which the user performs operation while observing the operation screen displayed in the screen D of the operation remote controller 161 is disclosed, but it can also be configured not to use the screen D, and to perform the brightness unevenness correction by the adjustment bar SB1, SB2, SB3 and the brightness setting frame SF1, SF2, SF3 displayed in the projection screen SD.

[0100] 1.3.2. Adjustment example 2

[0101] Reference Figure 3 and Figures 7 to 9B The brightness unevenness correction of the adjustment example 2 is described. In the adjustment example 2, the brightness unevenness of a different pattern from the adjustment example 1 is corrected. The same structure as the adjustment example 1 is labeled with the same figure number as the adjustment example, and the description thereof is omitted.

[0102] In step S3, the brightness setting screen is displayed based on the brightness unevenness correction program.

[0103] Figure 7 A projection screen SD1 which is the brightness setting screen projected onto the wall by the projector 1 is shown. The projection screen SD1 is an image in which the full-screen white image D1 for brightness correction of the first image is projected. In the adjustment example 2, a pattern of brightness unevenness in which the upper side and the lower side are bright and the center between the upper side and the lower side looks dark is generated in the projection screen SD1.

[0104] Further, in the projection screen SD1, the adjustment bar SB1, SB2 and the brightness setting frame SF1, SF2 are displayed by the OSD processing section 13. In the brightness setting frame SF1, SF2, the brightness information of the full-screen white image D1 for brightness correction of the first image is displayed.

[0105] Figure 8A A screen D of the operation remote controller 161 after the brightness information of the brightness setting frame F1 is changed from 100% to 50% by the user is shown.

[0106] In step S5, the brightness correction unit 121 changes the brightness of the image D1, which overlaps with the adjustment bar B1, to an intermediate gray level corresponding to 50% based on the brightness information set in the brightness setting box F1, and generates an image D1a in which the brightness between the adjustment bar B1 and the adjustment bar B2 changes to a value that is linearly interpolated between 50% and 100%.

[0107] Figure 8B The projected image SD1a, projected by projector 1 based on image D1a, is shown. In the projected image SD1a, the brightness near the center is darker than that on the top and bottom sides.

[0108] The user operates the remote control 161, displaying adjustment bar B3 as the first calibration point and adjustment bar B4 as the second calibration point. Furthermore, in Figure 3 In the flowchart, it is programmed to display adjustment bars B3 and B4 separately, but it can also be programmed to display adjustment bars B3 and B4 simultaneously.

[0109] Adjustment bar B4 is displayed at the desired position, which is the third position. The desired position is either a user-specified position or a pre-defined position such as the midpoint between adjustment bars B3 and B2. Furthermore, the third position must at least include the Y coordinates from images D1, D1a, and D2.

[0110] In step S10, the control unit 18 determines whether the user has indicated the adjustment bar B4. If the user has indicated the adjustment bar B4 (step S10 / Yes), the control unit 18 executes S11. If the user has not indicated the adjustment bar B4 (step S10 / No), the brightness unevenness correction ends.

[0111] In step S11, the control unit 18 displays the adjustment bar B4 on the screen D of the operation remote control 161 and the projection screen SD1.

[0112] In step S12, the control unit 18 moves the adjustment bar B4 from the desired position (the third position) to the fourth position based on the user's operation. Furthermore, the fourth position only needs to include the Y coordinates in images D1, D1a, and D2.

[0113] like Figure 9A As shown, adjustment bars B3 and B4 are displayed on screen D of the remote control 161. The user operates the remote control 161 to change the value of brightness setting box F3 from 65% to 100%. Additionally, the user changes the value of brightness setting box F4 from 80% to 90%. Furthermore, the values ​​of 65% for brightness setting box F3 and 80% for brightness setting box F4 are the initially displayed values ​​based on the position information of adjustment bars B3 and B4 and the brightness information of image D1a.

[0114] In step S9 and step S13, the control section 18 changes the brightness of the image Dla of the range overlapping each adjustment bar Bl, B2, B3, B4 to the corresponding intermediate gray based on the brightness information set in each brightness setting frame Fl, F2, F3, F4 by the brightness correction section 121, and generates an image D2 that makes the brightness between the adjustment bar Bl and the adjustment bar B2 change in a linear manner or using an approximate curve after interpolation, as a second image.

[0115] The image D2 is displayed on the screen D of the operation remote controller 161, and is projected by the projector 1.

[0116] Figure 9B A projection screen SD2 projected by the projector 1 based on the image D2 is shown. In the projection screen SD2, the brightness unevenness between the upper side and the lower side is substantially eliminated, and becomes a projection image of the same degree of brightness throughout the surface.

[0117] In addition, in the projection screen SD2, the adjustment bars SB 1, SB3, SB4, SB2 and the brightness setting frames SF 1, SF3, SF4, SF2 are displayed by the OSD processing section 13. The adjustment bar SB3 corresponds to the adjustment bar B3 displayed on the screen D of the operation remote controller 161, and the adjustment bar SB4 corresponds to the adjustment bar B4. In the brightness setting frames SF3, SF4, the same values as the brightness information displayed in the brightness setting frames F3, F4 of the screen D of the operation remote controller 161 are displayed.

[0118] The user operates the operation remote controller 161, and ends the brightness unevenness correction.

[0119] 1.3.3. Adjustment Example 3

[0120] Reference Figure 3 and Figures 10 to 11B The brightness unevenness correction of the adjustment example 3 is explained. In the adjustment example 3, the brightness unevenness of a pattern different from the adjustment example 1 and the adjustment example 2 is corrected. The same reference numerals as the other adjustment examples are given to the same structures of this adjustment example, and the explanation thereof is omitted.

[0121] In step S3, the brightness setting screen is displayed based on the brightness unevenness correction program.

[0122] Figure 10The projected image SD1 projected onto the wall by the projector 1 is shown. The projected image SD1 is an image in which the full-screen white image D1 for brightness correction as the 1st image is projected. In adjustment example 3, the projected image SD1 has a band-like portion that looks darker between the upper side and the lower side. In addition, at the boundary between the upper side portion and the band-like portion and the boundary between the lower side portion and the band-like portion, the difference in brightness is clearly seen. As a reason for the boundary where the difference in brightness is clearly seen like this, for example, a material having a different material, color, reflectance, or the like is sometimes used for a part of the wall.

[0123] As shown in FIG. 6, in the case where the portion where the difference in brightness is seen like a boundary in the projected image SD1 has a pattern where the brightness is uneven, two adjustment bars are displayed in the portion of the boundary. In addition, if two kinds of brightness information can be set in the portion of the boundary, the adjustment bar displayed in the portion of the boundary can also be one. Figure 10

[0124] As shown in FIG. 7, in the case where the portion where the difference in brightness is seen like a boundary in the projected image SD1 has a pattern where the brightness is uneven, two adjustment bars are displayed in the portion of the boundary. In addition, if two kinds of brightness information can be set in the portion of the boundary, the adjustment bar displayed in the portion of the boundary can also be one. Figure 11A The adjustment bar B5 and the adjustment bar B3 are displayed in positions adjacent to each other in the up-down direction. In addition, the adjustment bar B4 and the adjustment bar B6 are displayed in positions adjacent to each other in the up-down direction.

[0125] Specifically, the user moves the adjustment bar B5 to a position adjacent to the adjustment bar B3 after the adjustment bar B5 is displayed in the screen D. Similarly, the user moves the adjustment bar B6 to a position adjacent to the adjustment bar B4 after the adjustment bar B6 is displayed in the screen D. Furthermore, the adjustment bar B5 can be programmed to be displayed in a position adjacent to the adjustment bar B3. The adjustment bar B6 can also be programmed similarly.

[0126] The brightness setting frame F5 corresponding to the adjustment bar B5 is displayed adjacent to the upper side of the brightness setting frame F3 corresponding to the adjustment bar B3. The brightness setting frame F6 corresponding to the adjustment bar B6 is displayed adjacent to the lower side of the brightness setting frame F4 corresponding to the adjustment bar B4.

[0127] As shown in FIG. 8, the user sets the value of the brightness setting frame Fl to 60%, the value of the brightness setting frame F5 to 75%, the value of the brightness setting frame F3 to 100%, the value of the brightness setting frame F4 to 90%, the value of the brightness setting frame F6 to 85%, and the value of the brightness setting frame F2 to 100%.

[0128] Figure 11A As shown in FIG. 8, the user sets the value of the brightness setting frame Fl to 60%, the value of the brightness setting frame F5 to 75%, the value of the brightness setting frame F3 to 100%, the value of the brightness setting frame F4 to 90%, the value of the brightness setting frame F6 to 85%, and the value of the brightness setting frame F2 to 100%.

[0129] ​​The brightness correction section 121 changes the brightness of the image of the range overlapping each adjustment bar B1, B2, B3, B4, B5, B6 to the corresponding intermediate gray based on the brightness information set in the brightness setting frame F1, F2, F3, F4, F5, F6, and generates an image D2 that is the 2nd image in which the brightness between the adjustment bar B1 and the adjustment bar B5, between the adjustment bar B3 and the adjustment bar B4, and between the adjustment bar B6 and the adjustment bar B2 is changed by the values interpolated linearly. Further, the adjustment bar B5 is adjacent to the adjustment bar B3, so the interpolation processing is not performed. The same applies to between the adjustment bar B4 and the adjustment bar B6.

[0130] The image D2 is displayed on the screen D of the operation remote controller 161, and is projected by the projector 1.

[0131] Figure 11B A projection screen SD2 projected by the projector 1 based on the image D2 is shown. In the projection screen SD2, the brightness unevenness between the upper side and the lower side is substantially eliminated, and becomes a projection image in which the brightness is the same degree throughout the surface.

[0132] Further, in the projection screen SD2, the adjustment bars SB1, SB5, SB3, SB4, SB6, SB2 and the brightness setting frames SF1, SF5, SF3, SF4, SF6, SF2 are displayed by the OSD processing section 13. The adjustment bar SB5 corresponds to the adjustment bar B5 displayed on the screen D of the operation remote controller 161, and the adjustment bar SB6 corresponds to the adjustment bar B6. In the brightness setting frames SF5, SF6, the same values as the brightness information displayed in the brightness setting frames F5, F6 of the screen D of the operation remote controller 161 are displayed.

[0133] The user operates the operation remote controller 161, and ends the brightness unevenness correction.

[0134] 1.3.4. Adjustment Example 4

[0135] Reference Figure 3 , Figure 12 The brightness unevenness correction of the adjustment example 4 is explained. The same reference numerals as the other adjustment examples are assigned to the same structures of this adjustment example, and the explanation thereof is omitted. The adjustment example 4 shows a case where the projection light of the projector 1 is an elliptical shape, and the projector 1 projects an image as an elliptical shape.

[0136] As Figure 12 shown in the adjustment example 1, in this embodiment, in the step S3, the step S7, and the step S11, the adjustment bars SB1, SB3, SB4, SB2 displayed on the projection screen SD are displayed as curves as curved lines in accordance with the shape of the projection light of the projector 1. Further, the brightness setting frames SF1, SF3, SF4, SF2 are displayed as straight lines in accordance with the shape of the projection light of the projector 1. Figure 12The adjustment bars SB1, SB3, SB4, SB2 are displayed in a straight line, but can also be displayed in a curved line as with the adjustment bars SB1, SB3, SB4, SB2.

[0137] In adjustment example 4, the adjustment bars SB1, SB3, SB4, SB2 displayed in the projection screen SD are displayed in a curved line, unlike adjustment examples 1 to 3, but are otherwise the same as adjustment examples 1 to 3, and the luminance unevenness correction can also be performed as with adjustment examples 1 to 3.

[0138] 2. Embodiment 2

[0139] 2.1. Outline structure of image display apparatus

[0140] Reference Figure 13 The outline structure of the portable terminal apparatus 5 as an image display apparatus will be described. Figure 13 is a block diagram showing the outline structure of the portable terminal apparatus 5 of Embodiment 2.

[0141] In the portable terminal apparatus 5, a luminance unevenness correction program is stored in the portable terminal apparatus 5, and the user performs luminance unevenness correction of the projector 1A through the portable terminal apparatus 5.

[0142] The portable terminal apparatus 5 is, for example, a smartphone, a tablet PC, a laptop PC, or a PDA (Personal Digital Assistant).

[0143] The portable terminal apparatus 5 has a signal input section 51, an image processing section 52, a brightness correction section 521, an OSD processing section 53, an image information output section 54, an input section 56, a control section 58 that controls each section, a storage section 59, and a screen D as a display section, as functional blocks.

[0144] The signal input section 51 outputs image information read out from the storage section 59 or image information supplied via an unillustrated Internet line to the image processing section 52.

[0145] The image processing section 52 performs prescribed image processing based on an image processing program on the image information and outputs the image information to the image information output section 54. As the prescribed image processing, there are included luminance unevenness correction, resolution conversion, sharpness adjustment, and the like.

[0146] The brightness correction section 521 corrects the brightness of the image information based on brightness correction information in the image processing section 52. In addition, based on a luminance unevenness correction program, the brightness of the image information is corrected, and information used for the correction is stored in the storage section 59 as the brightness correction information. Further, the brightness correction information is also stored in the storage section 29 of the projector 1A described later.

[0147] The OSD processing section 53 outputs OSD image information that is a menu image or a message image superimposed on the image information processed by the image processing section 52, based on an instruction from the control section 58. The OSD image information is stored in the storage section 59.

[0148] The image information output section 54 outputs the image information and the OSD image information to the projector 1A.

[0149] The input section 56 receives an input operation from a user. The input section 56 includes a keyboard, a mouse, a touch input, a voice input, a gesture input, and the like.

[0150] The screen D displays a first image used when correcting the brightness of the image information.

[0151] When the user operates the screen D of the portable terminal device 5, the input section 56 outputs an operation signal corresponding to the operation content of the user to the control section 58.

[0152] The control section 58 integrally controls each functional block of the portable terminal device 5.

[0153] The storage section 59 stores an image processing program including the brightness unevenness correction program, a control program, control data used by the control program, and image information such as content images. In addition, the control data includes the first image used by the brightness unevenness correction program, brightness correction information set by the brightness unevenness correction program, and the like. In addition, the control program and the control data including the brightness unevenness correction program, and the image information are saved in an external server, and can be downloaded via an Internet line or the like in a timely manner.

[0154] The projector 1A projects an image based on the image information supplied from the portable terminal device 5 to the screen SC. The embodiment 2 also uses a wall, a column, or the like as the screen SC, like the embodiment 1.

[0155] The projector 1A includes a light source section 21, a liquid crystal light valve 23R for red, a liquid crystal light valve 23G for green, and a liquid crystal light valve 23B for blue, a light source drive section 22, a light valve drive section 24, a projection lens 25, an image input section 26, an image processing section 27, a control section 28, and a storage section 29.

[0156] The brightness correction information used in the brightness correction processing performed by the image processing section 27 is stored in the storage section 29. The brightness correction information is stored in the storage section 29 when the brightness unevenness correction is performed by the portable terminal device 5. In addition, the storage section 29 stores image information corresponding to a content image displayed by the projector 1A. The content image information stored in the storage section 29 is supplied from the portable terminal device 5 or via an Internet line.

[0157] The image processing section 27 corrects the content image information based on the brightness correction information stored in the storage section 29, and outputs to the light valve driving section 24.

[0158] The projector 1A can be set as shown in the setting examples of FIGS. 1A to 1C. Figure 2A 、 Figure 2B and Figure 2C .

[0159] Further, in a case where brightness unevenness occurs in the projection screen of the projector 1A, the brightness unevenness correction can be performed using the portable terminal device 5 in the same manner as in Embodiment 1. In the description of Embodiment 1, the screen D on which the remote controller 161 is operated can be appropriately replaced with the screen D of the portable terminal device 5.

[0160] As described above, according to the present embodiment, the following effects can be obtained.

[0161] The brightness unevenness correction method as the image processing method of one embodiment of the present application is an image processing method of a projector 1 or a portable terminal device 5 that displays an image displayed by a liquid crystal light valve 23 as a light modulation device, and includes: a step S3 of displaying an image D1 as a first image; a step S7 of displaying a bar B3 or a bar SB3 as a first correction bar that corresponds to a first brightness at a position indicated by a broken line as a first position in the image D1; a step S8 of moving the bar B3 or the bar SB3 from the first position to a position indicated by a solid line as a second position along a Y axis as a first axis of the image D1; and a step S9 of generating an image D2 as a second image in which a range including a position corresponding to the second position of the image D1 and intersecting the Y axis is the first brightness.

[0162] Thus, the brightness unevenness correction method as the image processing method of the present embodiment displays the bar B3 or the bar SB3 that corresponds to the first brightness on the image D1, moves the bar B3 or the bar SB3 from the first position to the second position, and generates the image D2 in which a range including a position corresponding to the second position is the first brightness.

[0163] Therefore, it is possible to provide a brightness unevenness correction method in which correction appropriate to a pattern of brightness unevenness can be easily performed even in a case where brightness unevenness of various patterns occurs.

[0164] The luminance unevenness correction method of the image processing method of one embodiment of the present application further includes: a step Sll of displaying the adjustment bar B4 or the adjustment bar SB4 as the second correction point corresponding to the second luminance at the desired position as the third position of the image Dl as the first image; a step S12 of moving the adjustment bar B4 or the adjustment bar SB4 from the third position to a fourth position along the Y axis as the first axis; and a step S13 of generating the image D2 as the second image including a range corresponding to the fourth position of the image Dl and intersecting the Y axis, which has the second luminance.

[0165] Thus, the luminance unevenness correction method of the image processing method of one embodiment of the present application displays the adjustment bar B4 or the adjustment bar SB4 corresponding to the second luminance on the image Dl, moves the adjustment bar B4 or the adjustment bar SB4 from the third position to the fourth position, and generates the image D2 having the second luminance in the range including the position corresponding to the fourth position.

[0166] Thus, the luminance unevenness correction method of the image processing method of one embodiment of the present application displays the adjustment bar B4 or the adjustment bar SB4 corresponding to the second luminance on the image Dl, moves the adjustment bar B4 or the adjustment bar SB4 from the third position to the fourth position, and generates the image D2 having the second luminance in the range including the position corresponding to the fourth position.

[0167] Thus, the luminance unevenness correction method of the image processing method of one embodiment of the present application displays the adjustment bar B4 or the adjustment bar SB4 corresponding to the second luminance on the image Dl, moves the adjustment bar B4 or the adjustment bar SB4 from the third position to the fourth position, and generates the image D2 having the second luminance in the range including the position corresponding to the fourth position.

[0168] Thus, the luminance unevenness correction method of the image processing method of one embodiment of the present application displays the adjustment bar B4 or the adjustment bar SB4 corresponding to the second luminance on the image Dl, moves the adjustment bar B4 or the adjustment bar SB4 from the third position to the fourth position, and generates the image D2 having the second luminance in the range including the position corresponding to the fourth position.

[0169] Thus, the luminance unevenness correction method of the image processing method of one embodiment of the present application displays the adjustment bar B4 or the adjustment bar SB4 corresponding to the second luminance on the image Dl, moves the adjustment bar B4 or the adjustment bar SB4 from the third position to the fourth position, and generates the image D2 having the second luminance in the range including the position corresponding to the fourth position.

[0170] Thus, the luminance unevenness correction method of the image processing method of one embodiment of the present application displays the adjustment bar B4 or the adjustment bar SB4 corresponding to the second luminance on the image Dl, moves the adjustment bar B4 or the adjustment bar SB4 from the third position to the fourth position, and generates the image D2 having the second luminance in the range including the position corresponding to the fourth position.

[0171] Thus, the luminance unevenness correction method of the image processing method of one embodiment of the present application displays the adjustment bar B4 or the adjustment bar SB4 corresponding to the second luminance on the image Dl, moves the adjustment bar B4 or the adjustment bar SB4 from the third position to the fourth position, and generates the image D2 having the second luminance in the range including the position corresponding to the fourth position.

[0172] Therefore, it is possible to provide a luminance unevenness correction method that can easily perform designation of an adjustment range and can easily perform correction of luminance unevenness even in a case where luminance unevenness of various patterns occurs.

[0173] In the luminance unevenness correction method of the image processing method of one embodiment of the present application, the adjustment bar SB4, which is a line indicating a range intersecting the Y axis, is curved.

[0174] In the projector 1 that displays an image in an elliptical shape, it is possible to provide a luminance unevenness correction method that can easily perform correction of luminance unevenness even in a case where luminance unevenness of various patterns occurs.

[0175] The luminance unevenness correction method of the image processing method of one embodiment of the present application further includes step S7 or step S8 of changing a first brightness corresponding to the adjustment bar B3 or the adjustment bar SB3, which is a first correction point, to a third brightness.

[0176] Therefore, it is possible to provide a luminance unevenness correction method that can easily perform correction of luminance unevenness even in a case where luminance unevenness of various patterns occurs.

[0177] The luminance unevenness correction method of the image processing method of one embodiment of the present application further includes step S13 of linearly changing a brightness between the adjustment bar B3 or the adjustment bar SB3 and the adjustment bar B4 or the adjustment bar SB4, the adjustment bar B3 or the adjustment bar SB3 being a range including a position corresponding to a second position of an image D1, which is a first image, and intersecting a Y axis, which is a first axis, and the adjustment bar B4 or the adjustment bar SB4 being a range including a position corresponding to a fourth position of the image D1 and intersecting the Y axis.

[0178] Therefore, it is possible to provide a luminance unevenness correction method that can easily perform correction of luminance unevenness even in a case where luminance unevenness of various patterns occurs.

[0179] In the image processing method of one embodiment of the present application, the image display device is the portable terminal device 5, and step S3 of displaying the image D1, which is a first image, is displaying the image D1 on a screen D of the portable terminal device 5.

[0180] Therefore, the user can perform luminance unevenness correction while observing the screen D of the smartphone, which is the portable terminal device 5.

[0181] The program of one embodiment of the present application causes the projector 1 or the portable terminal device 5 which is an image display device that displays an image after modulation by the liquid crystal light valve 23 which is a light modulation device to perform the following steps: displaying an image Dl which is a first image; displaying a bar B3 or a bar SB3 which is a first correction point corresponding to a first luminance at a position indicated by a dashed line which is a first position of the image Dl; moving the bar B3 or the bar SB3 from the first position to a position indicated by a solid line which is a second position along a Y axis which is a first axis of the image Dl; and generating an image D2 which is a second image in which a range including a position corresponding to the second position of the image Dl and intersecting the Y axis has a luminance of the first luminance.

[0182] Thus, the luminance unevenness correction program as the program of this embodiment performs the following processing: displaying the bar B3 or the bar SB3 which has established a correspondence with the first luminance on the image Dl, moving the bar B3 or the bar SB3 from the first position to the second position, and generating the image D2 in which a range including a position corresponding to the second position has the first luminance.

[0183] Thus, the luminance unevenness correction program as the program of this embodiment performs the following processing: displaying the bar B3 or the bar SB3 which has established a correspondence with the first luminance on the image Dl, moving the bar B3 or the bar SB3 from the first position to the second position, and generating the image D2 in which a range including a position corresponding to the second position has the first luminance.

[0184] The projector 1 of one embodiment of the present application includes the optical device 20 and the processor 10 which performs: displaying an image Dl which is a first image on a projection screen SD using the optical device 20; displaying a bar B3 or a bar SB3 which is a first correction point corresponding to a first luminance at a position indicated by a dashed line which is a first position of the image Dl using the optical device 20; moving the bar B3 or the bar SB3 from the first position to a position indicated by a solid line which is a second position along a Y axis which is a first axis of the image Dl; and generating an image D2 which is a second image in which a range including a position corresponding to the second position of the image Dl and intersecting the Y axis has a luminance of the first luminance.

[0185] Thus, the projector 1 of this embodiment displays the bar B3 or the bar SB3 which has established a correspondence with the first luminance on the image Dl, moves the bar B3 or the bar SB3 from the first position to the second position, and generates the image D2 in which a range including a position corresponding to the second position has the first luminance.

[0186] Thus, the projector 1 of this embodiment displays the bar B3 or the bar SB3 which has established a correspondence with the first luminance on the image Dl, moves the bar B3 or the bar SB3 from the first position to the second position, and generates the image D2 in which a range including a position corresponding to the second position has the first luminance.

[0187] In the above-described embodiments, the first axis is described as the Y axis, but the first axis can be the X axis. For example, in a case where the projector 1 is disposed on the left side of a wall and projects an image from the left side of the wall to the right side, or in a case where the length direction of the projection screen SD is the left-right direction, the display can be configured to display each adjustment bar in the Y direction with the first axis as the X axis.

[0188]

[0189] With respect to the above-described embodiments, for example, the following modifications can be made. In addition, the modes of the following-described modifications can be appropriately combined with one or more of the modes selected arbitrarily.

[0190] Modification 1: The projector 1 can also be disposed at a position other than the ceiling or the wall, and can also be disposed at a position facing the projection surface. For example, the projector 1 can also be disposed on the floor. The shape of the projection screen SD can also be a shape other than a trapezoidal shape. For example, the shape can be a rectangular shape or a circular shape.

[0191] Modification 2: The first axis can be a direction other than the long side direction of the projection screen SD, and can also be the short side direction. For example, in a case where the projector 1 is disposed on the left side of a wall and projects an image from the left side of the wall to the right side, or in a case where the short side direction of the projection screen SD becomes the up-down direction, the display can also be configured to display each adjustment bar in the X direction with the first axis as the Y axis in the short side direction.

[0192] Modification 3: In each of the embodiments, the first correction point or the second correction point is at least one point included in the solid line of the adjustment bar B1 to B6 and the adjustment bar SB1 to SB6, but is not limited thereto. The first correction point or the second correction point can be displayed using a circle, a rectangle, or the like, or can be displayed using an arrow or the like indicating a position in the first axis.

[0193] Modification 4: In the adjustment examples 1 to 3, the adjustment bar B1 to B6 and the adjustment bar SB1 to SB6 are straight lines, but are not limited thereto. The adjustment bar B1 to B6 and the adjustment bar SB1 to SB6 can both be curved lines, or at least one of the adjustment bar B1 to B6 and the adjustment bar SB1 to SB6 can be a curved line.

[0194] The present application has been described based on preferred embodiments, but the present application is not limited to the above-described embodiments. In addition, the structure of each part of the present application can be replaced with any structure that functions the same as the above-described embodiments, and in addition, any structure can be added.​

Claims

1. An image processing method comprising: displaying a first image that is an image projected by a projector; displaying a first correction point that corresponds to a first luminance at a first position of the first image; moving the first correction point from the first position to a second position of the first image along a first axis of the first image; and generating a second image projected by the projector, a range of the second image that includes a position corresponding to the second position and that intersects the first axis having the first luminance, a luminance of the second image between one end portion along the first axis and the position corresponding to the second position being interpolated between a value representing a luminance of the one end portion and the first luminance.

2. The image processing method of claim 1, wherein, The image processing method further comprises: displaying a second correction point that corresponds to a second luminance at a third position of the first image; moving the second correction point from the third position to a fourth position along the first axis; and generating the second image having the second luminance at a range that includes a position corresponding to the fourth position and that intersects the first axis.

3. The image processing method of claim 1, wherein, Displaying the first correction point includes displaying a line representing a range that intersects the first axis.

4. The image processing method of claim 2, wherein, Displaying the second correction point includes displaying a line representing a range that intersects the first axis, moving the second correction point to the fourth position includes moving the line to the fourth position, and, in generating the second image, the range that intersects the first axis overlaps the line.

5. The image processing method of claim 3, wherein, The line representing a range that intersects the first axis is a curved line.

6. The image processing method of claim 1, wherein, The image processing method further comprises: changing the first luminance corresponding to the first correction point to a third luminance.

7. The image processing method of claim 2, wherein, The image processing method includes causing the luminance of the second image between the position corresponding to the second position and the position corresponding to the fourth position to linearly change from one of the position corresponding to the second position and the position corresponding to the fourth position toward the other.

8. The image processing method according to any one of claims 1 to 7, wherein, Displaying the first image includes displaying the first image on a screen of a portable terminal device.

9. A recording medium recording a program that causes an image display device to execute processing of: displaying a first image that is an image projected by the image display device; displaying a first correction point that corresponds to a first luminance at a first position of the first image; moving the first correction point from the first position to a second position of the first image along a first axis of the first image; and generating a second image projected by the image display device, a range of the second image that includes a position corresponding to the second position and that intersects the first axis having the first luminance, a luminance of the second image between one end portion along the first axis and the position corresponding to the second position being interpolated between a value representing a luminance of the one end portion and the first luminance.

10. A projector having an optical device and a processor, the processor performing the following processes: displaying, using the optical device, a first image as an image projected by the projector on a projection screen; displaying, using the optical device, a first correction dot corresponding to a first brightness at a first position of the first image; moving the first correction dot from the first position to a second position of the first image along a first axis of the first image; and generating a second image projected by the projector, the second image having a brightness of the first brightness in a range including a position corresponding to the second position and intersecting the first axis, and the second image having a brightness between a value representing a brightness of one end portion and the first brightness along the first axis between the one end portion and the position corresponding to the second position being interpolated.

Images