JP2018200368A - Projection device - Google Patents

Abstract

To provide a projection device that reduces such a complicated operation as to approximate an OSD(On-Screen Display) menu for displaying/setting a parameter to a correction region in the case of performing correction processing.SOLUTION: A projection device comprises: image processing means for performing image processing to a projection image to be projected by the projection device; influence region calculation means for calculating a region in the projection image affected by the image processing as an influence region; superimposition and display means for superimposing and displaying an on-screen display for displaying a set value of the image processing on a part of the region of the projection image; and superimposition and display region determination means for determining a superimposition and display region on the basis of a result of the influence region calculation means, and for setting a non-influence region in the vicinity of the influence region as the superimposition and display region.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a projection apparatus that projects an image. In particular, the present invention relates to a projection apparatus that allows a user to adjust a setting value (parameter) of correction processing to be performed on an image to be projected by projecting it on a screen.

  In recent years, liquid crystal projectors equipped with a function for performing a correction process on an image to be projected have been developed. For example, there is a so-called warping correction processing function that performs distortion correction processing on each small area obtained by dividing an image to be projected in order to cancel distortion generated when the image is projected onto a non-planar screen. In addition, there is a trapezoidal distortion correction processing function for correcting so-called trapezoidal distortion that occurs when the screen is projected from an oblique direction rather than the front. In addition, liquid crystal projectors equipped with various correction processing functions such as a contour enhancement function for enhancing the contour of an object reflected in a projection image and a contrast adjustment function for adjusting the contrast of the projection image have been developed.

  Here, warping will be described in detail. Warping is a method of transforming an image into an arbitrary shape. More specifically, virtual lattice points are set in advance in an image to be deformed, and the coordinates between the lattice points after the movement are interpolated by designating which coordinates the lattice points are moved to after the deformation. This is a method of transforming an image. This will be described in detail with reference to FIG. When performing the warping process, lattice points are virtually arranged on the image as shown in FIG. The interpolation method will be described with reference to FIGS. 5B and 5C. FIG. 5B shows the state before deformation, and FIG. 5C shows the state after deformation.

  Lattice points used for interpolation are P1, P2, P3, and P4. The coordinate S of the pre-deformation image in FIG. 5B becomes the coordinate D of the post-deformation image when the grid point P1 is moved as shown in FIG. 5C. P1 'is an intersection of a straight line passing through P1 and coordinates S and a line segment P2-P4. If the position of the coordinate S of the pre-deformation image is α: 1-α of the line segment P1-P1 ′, and the position of P1 ′ is β: 1-β of the line segment P2-P4, the post-deformation image The coordinate D is also obtained from the coordinates of the lattice points P1, P2, P3, and P4 and the ratios.

  At this time, if the coordinate D of the post-deformation image is an integer, this may be used as it is as the pixel value of the coordinate S of the pre-deformation image. However, the transformed coordinates obtained by interpolation are not always integers. In that case, the pixel value of the coordinate D of the post-transformation image is obtained by performing interpolation using the pixel values of the peripheral pixels of the coordinate D of the post-deformation image. The interpolation method may be bilinear, bicubic, or any other interpolation method.

  In a liquid crystal projector equipped with a correction processing function as described above, various parameters for performing correction processing can often be specified from the setting menu of the liquid crystal projector. For example, when a liquid crystal projector capable of displaying warping parameters on an OSD (on-screen display) menu is used, the warping can be set while checking the OSD menu parameters and the degree of distortion correction of the actual projection image. . This will be described with reference to FIG.

  FIG. 6A is an overhead view showing an example in which the warping setting is performed by the liquid crystal projector. Reference numeral 601 denotes a screen on which an image is projected by a liquid crystal projector 608 described later. Reference numeral 602 denotes a projection image projected on the screen 601 by a liquid crystal projector 608 described later. Reference numeral 603 denotes an OSD (on-screen display) menu that is projected by a liquid crystal projector 608 (described later) superimposed on the projected image 602. The OSD menu 603 is for the liquid crystal projector 608 to project the information on the projection image 602 so as to present various information to the user.

  Reference numeral 604 denotes a lattice point moved by a user operation in the setting of warping. If it compares in FIG.5 (c), it will correspond to the point P1. Reference numeral 605 denotes a region deformed by warping caused by moving the lattice point 604, and corresponds to a region surrounded by points P1, P2, P4, and P3 in FIG. 5C.

  Reference numeral 606 denotes an image signal source. The image signal source 606 transmits an image signal. The image signal source 606 transmits an image signal of an image to be displayed on a liquid crystal projector 608 described later to a video cable 607 described later.

  Reference numeral 607 denotes a video cable. The video cable 607 transmits the image signal transmitted from the image signal source 606 to a liquid crystal projector 608 described later. The video cable 607 is implemented as, for example, a cable conforming to the DisplayPort (registered trademark) standard. Alternatively, a cable of another standard such as the HDMI (registered trademark) standard or the DVI (trademark) standard may be used. Reference numeral 608 denotes a liquid crystal projector. The liquid crystal projector 608 receives an image signal via the video cable 607 and projects and displays an image on the screen 601.

  The user of the liquid crystal projector 608 operates a remote control (not shown) while confirming the warping parameters (for example, the amount of movement of the grid points 604) displayed on the OSD menu 603 and the distortion correction conditions around the grid points 604. Set up. At this time, if the lattice point 604 to be warped is close to the display position of the OSD menu 603, the movement of the user's line of sight is reduced, and the operability is improved.

  Some types of liquid crystal projectors allow the user to specify the position where the OSD menu 603 is displayed in the projected image 602. Therefore, for example, if the user of the liquid crystal projector 608 designates the display position of the OSD menu 603 and displays the OSD menu 603 near the lattice point 604, the operability may be improved.

  As a reference technique, Patent Document 1 discloses an invention in which, in image processing software on a personal computer, a pop-up menu is displayed near an area on an image selected by a user by a mouse drag-and-drop operation, particularly near an end point of area selection. Has been.

JP 2011-138528

  As described above, among liquid crystal projectors that can specify various parameters for correction processing from the OSD menu, there are those that can specify the display position of the OSD menu by a user operation. In such a liquid crystal projector, the user often wants to display the OSD menu near the image area to be corrected. However, since the area affected by the correction process differs depending on the content of the correction process, the user places the OSD menu where. There are many cases where you do not know what to display.

  For example, in FIG. 6, the boundary of the region 605 is clearly indicated by shading or a broken line for the sake of explanation. However, since the emphasis such as shading is not performed in the actual projection image, the boundary of the region 605 is difficult for the user to understand. Therefore, if the user brings the OSD menu 603 too close to the grid point 604, a part of the area 605 is hidden by the OSD menu 603 as shown in FIG. 6B, and the distortion correction degree of the area 605 cannot be seen. It will be difficult to adjust. In addition, for example, in setting work for keystone distortion correction, it is considered important to always be able to visually recognize the outer shape of the projected image. Therefore, it is preferable to display the OSD menu while avoiding the outline of the projected image. However, since the outline position of the projected image differs depending on the deformation due to the trapezoidal distortion correction, the user does not know where to display the OSD menu.

  Therefore, an object of the present invention is to reduce a complicated operation of bringing an OSD menu for displaying and setting parameters close to a correction area when performing correction processing.

The present invention is a projection apparatus,
Image processing means for image processing a projection image projected by the projection device;
An affected area calculating means for calculating an area in the projected image affected by the image processing as an affected area;
Superimposed display means for displaying an on-screen display for displaying the set value of the image processing superimposed on a partial area of the projected image;
A superimposed display region determining unit having a function of determining a superimposed display region based on a result of the affected region calculation unit, and setting a region that is near the affected region and is not the affected region as the superimposed display region;
A projection apparatus comprising:

  According to the present invention, it is easy to display the OSD menu close to the area to be corrected so that the area to be corrected and the OSD menu do not overlap.

The overhead view which shows the structural example of the system containing the projection apparatus to which this invention is applied. The block diagram which shows the structural example of the apparatus contained in FIG. The flowchart example for implementing this invention. The flowchart example for implementing this invention. The figure which supplements description of the Example of this invention. The figure which supplements description of the Example of this invention. The figure which supplements description of the Example of this invention. The figure which supplements description of the Example of this invention. The figure which supplements description of the Example of this invention. The figure explaining warping. A bird's-eye view showing an example of setting warping on an LCD projector

  Hereinafter, examples of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to the following embodiments.

[Example 1]
In this embodiment, an example in which warping is set using a liquid crystal projector to which the present invention is applied will be described. However, the application range of the present invention is not limited to a liquid crystal projector, and can be applied to any type of projection apparatus including a digital mirror device projector.

<Overall configuration>
The overall configuration is shown in FIG. FIG. 1A is a bird's-eye view showing an example in which warping is set by a liquid crystal projector. Reference numeral 101 denotes a screen on which an image is projected by a liquid crystal projector 202a described later. Reference numeral 102 denotes a projection image projected on the screen 101 by a liquid crystal projector 202a described later. Reference numeral 103 denotes an OSD (on-screen display) menu that is projected on a projection image 102 by a liquid crystal projector 202a described later. The OSD menu 103 is for the liquid crystal projector 202a to superimpose and project on the projection image 102 in order to present various information to the user.

  Reference numeral 104 denotes a grid point moved by a user operation in the setting of warping. If it compares in FIG.5 (c), it will correspond to the point P1. An area 105 is deformed by warping by moving the lattice point 104, and corresponds to an area surrounded by points P1, P2, P4, and P3 in FIG. 5C.

  Reference numeral 200 denotes an image signal source. The image signal source 200 transmits an image signal. The image signal source 200 transmits an image signal of an image displayed on a liquid crystal projector 202a described later to a video cable 201a described later. 201a is a video cable. The video cable 201a transmits the image signal transmitted from the image signal source 200 to the liquid crystal projector 202a described later. The video cable 201a is implemented, for example, as a cable that conforms to the DisplayPort (registered trademark) standard. Alternatively, a cable of another standard such as the HDMI (registered trademark) standard or the DVI (trademark) standard may be used.

  Reference numeral 202a denotes a liquid crystal projector. The liquid crystal projector 202a receives an image signal via the video cable 201a, and projects and displays an image on the screen 101.

  The user of the liquid crystal projector 202a operates warping by operating a remote controller (not shown) while confirming the warping parameters (for example, the movement amount of the grid points 104) displayed on the OSD menu 103 and the distortion correction conditions around the grid points 104. Set up.

<Detailed configuration>
Next, the block configuration of the image signal source 200 and the liquid crystal projector 202a will be described in detail with reference to FIGS. 2 (a) and 2 (b). In addition, a remote controller for transmitting a user operation to the liquid crystal projector 202a will be described with reference to FIG.

  FIG. 2A is a block diagram inside the image signal source 200. Inside the image signal source 200, a CPU 211, a main storage device 212, a video controller 213, a network controller 214, an input / output interface 215, and an auxiliary storage device 216 are connected to each other via a bus 210.

  The CPU 211 controls each operation block of the image signal source 200. Further, the CPU 211 executes in accordance with the OS and application code stored in the auxiliary storage device 216 or an external server (not shown). The CPU 211 forms image data on the main storage device 212 using the video controller 213 according to these codes. Examples of applications include presentation software, spreadsheet software, video playback software, and the like.

  The main storage device 212 is a work memory for the CPU 211 to operate. The network controller 214 is a means for the CPU 211 to connect to an external server or network device (not shown). The input / output interface 215 is an interface for connecting a device for operating the image signal source 200 by a user, such as a keyboard and a mouse (not shown).

  The auxiliary storage device 216 stores an OS (Operating System), applications, and data, and these are used by the CPU 211.

  The video controller 213 is controlled by the CPU 211 and generates image data. The video controller 213 is connected to the image transmission unit 217a. The image transmission unit 217a has a function of receiving the image data generated by the video controller 213, converting it to a format suitable for transmission to an external device, and transmitting the data. The video controller 213 is connected to the communication unit 218a. The communication unit 218a communicates with an external device on the image signal receiving side. The communication unit 218a can read the display performance information of the liquid crystal projector 202a.

  This display performance information indicates the characteristic information of the receiving device of the image data, and one of them stores the optimum number of image pixels of the device.

  With such a configuration, appropriate applications and data can be installed in the auxiliary storage device 216 or an external server (not shown). Therefore, based on these applications and data, the image signal source 200 can generate images such as presentation images, images showing spreadsheet results, and video images and output them to external devices.

  FIG. 2B is a block diagram of the liquid crystal projector 202a. Inside the liquid crystal projector 202 a, an image receiving unit 221 a, a communication unit 222 a, an image processing unit 223 a, an optical system 224 a, a spatial modulation unit 225 a, a control unit 226, an operation unit 227, a network controller 230, a ROM 240, and a RAM 241 are connected via the bus 220. Are connected to each other.

  The control unit 226 controls each block of the liquid crystal projector 202a. The control unit 226 loads a code describing a processing procedure from a ROM 240 described later, and operates while using a RAM 241 described later as a work memory.

  The image receiving unit 221 a is a circuit that receives image data from the image signal source 200. The image receiving unit 221a receives image data in DisplayPort or HDMI (registered trademark) format suitable for communication via the cable 201a, converts the image data into a digital signal format suitable for internal processing, and outputs the digital signal format to the image processing unit 223a. To do.

  The communication unit 222a is a circuit for performing communication related to display performance information with an external device such as the image signal source 200. The communication unit 222a has a storage unit 228a for storing display performance information of the liquid crystal projector 202a. An example of the display performance information is EDID (Extended Display Identification Data) defined by VESA (Video Electronics Standards Association). The image receiving unit 221a and the communication unit 222a can be connected to the video cable 201a.

  The image processing unit 223a is a circuit that performs image processing on the image data received by the image receiving unit 221a and outputs the processed image data to the subsequent spatial modulation unit 225a. Examples of image processing include tone correction and enlargement / reduction processing. In order to perform tone correction, for example, the image processing unit 223a converts a tone value of each pixel of the input image and outputs a lookup table (LUT) that associates an input tone value and an output tone value for output. ). The LUT is stored, for example, in a RAM 241 described later.

  The LUT is set with an initial value when the liquid crystal projector 202a is manufactured, and can be updated by the control unit 226 or changed by an adjustment operation by the user of the liquid crystal projector 202a. In addition, the image processing unit 223a may have functions of warping, trapezoidal distortion correction, contour enhancement, and contrast adjustment.

  The optical system 224a irradiates light to a spatial modulation unit 225a described later. The optical system 224a includes a light source (not shown), a light source control unit, an illumination system lens, and an illumination system lens control unit.

  The spatial modulation unit 225a forms an image output from the image processing unit 223a. The spatial modulation unit 225a includes a liquid crystal panel (not shown) and a liquid crystal panel control unit. The liquid crystal panel control unit of the spatial modulation unit 225a forms an image on each liquid crystal panel based on the image output from the image processing unit 223a, and the image is projected by irradiating each liquid crystal panel with light 224a.

  A projection optical system (not shown) included in the liquid crystal projector 202a projects the visible light irradiated on the spatial modulation unit 225a onto the screen 101a.

  The operation unit 227 is an operation member for the user to operate the liquid crystal projector 202a, and is, for example, an operation button or a light receiving unit that receives instructions from the remote controller 400 described later. Information on the operation instruction received by the operation unit 227 is transmitted to the control unit 226.

  The network controller 230 is a circuit for transmitting / receiving arbitrary data such as image data to / from an external device. The network controller 230 is connected to a network cable 203 (not shown in FIG. 1). Under the control of the control unit 226, the network controller 230 receives image data via the network cable 203 and transmits them to the control unit 226 via the bus 220. In addition, the network controller 230 transmits the image data transmitted from the control unit 226 via the bus 220 via the network cable 203 under the control of the control unit 226.

  The ROM 240 describes processing procedures executed by the control unit 226 and a reference LUT described later. The ROM 240 stores an identifier for identifying the liquid crystal projector in advance, and the control unit 226 can read this identifier. The RAM 241 is a work memory used when the control unit 226 executes processing.

  The remote controller 400 will be described with reference to FIG. The remote controller 400 transmits an instruction signal corresponding to each button to the operation unit 227 of the liquid crystal projector 202a when each button described later included in the remote controller 400 is pressed. The instruction signal is, for example, a signal indicating which button is pressed among the buttons to be described later. This signal is modulated into an infrared pulse signal, for example, and transmitted to the operation unit 227 of the liquid crystal projector 202a.

  Reference numerals 405a, 405b, 405c, and 405d are cross buttons. These buttons mean up, left, right, and bottom, respectively, and are pressed when selecting an item from a plurality of options. The determination button 410 is a button that means determination, and is mainly pressed when confirming selection of an item. The cancel button 411 is a button that means cancel, and is mainly pressed when stopping the operation. The warping button 412 is a button that is pressed when the setting of warping is started. The trapezoidal correction button 413 is a button that is pressed when setting of keystone distortion correction is started.

  The color adjustment button 414 is a button that is pressed when setting of color adjustment is started. Color adjustment refers to, for example, adjusting the hue, saturation, luminance, and the like of a region included in the projection image 102 that is a specific hue among the hues included in the projection image 102. To give a more specific example, it is to increase the saturation of a region whose hue is blue. The contour emphasis button 415 is a button that is pressed when the setting of contour emphasis is started. The contrast button 416 is a button that is pressed when contrast adjustment is started.

<Operation flow>
A detailed operation flow of the present invention in this embodiment will be described with reference to FIG.

  As a situation at the start of the operation flow of the present embodiment, a situation is assumed in which the liquid crystal projector 202a projects an image on the screen 101 as shown in FIG. However, unlike FIG. 1A, it is assumed that the warping setting operation is not being performed, and the liquid crystal projector 202 a is in a state of projecting an image input from the image signal source 200.

  The flowchart in FIG. 3A is a flowchart executed by the control unit 226 of the liquid crystal projector 202a. However, the time point when the control unit 226 detects that the warping button 412 of the remote controller 400 has been pressed in the normal projection state by controlling the operation unit 227 is set as the start point in FIG.

  In S310, control unit 226 controls image processing unit 223a to output OSD menu 103 for starting warping. The OSD menu 103 at this time is shown in FIG. 4B, and the projected image 102 is shown in FIG. The lattice point 430 represents a lattice point selected by the user for setting the warping. It is assumed that the upper left lattice point is selected instead of the lattice point 430 at the time of S310. Details of the area 431 will be described later.

  Next, in S320, control unit 226 determines whether or not a grid point has been selected by the user of liquid crystal projector 202a. If it is determined that it has been selected, the process proceeds to S330, and if it is determined that it has not been selected, the process proceeds to S320 again to enter a waiting state. Here, selection of lattice points will be described. The user of the liquid crystal projector 202a operates the cross buttons 405a, 405b, 405c, 405d and the enter button 410 of the remote control 400 in accordance with the instructions described in the OSD menu 103 in FIG. Then, the user of the liquid crystal projector 202a selects a grid point that moves by warping. The content described in the frame 420 in FIG. 4B shows a state in which the user of the liquid crystal projector 202a has selected the lattice point 430 in FIG. 4C.

  Next, in S330, the control unit 226 reads out the position (column and row information) of the grid point selected by the user in S320 from the operation unit 227.

  Next, in S340, control unit 226 calculates a region to be deformed by the warping process. First, based on the grid point information read in S330, a grid point adjacent to the selected grid point is calculated. The calculation method will be described below with an example. Here, as shown in FIGS. 4B and 4C, the description will be made assuming that the user selects the grid point 430 located in the second column and the sixth row in S330. At this time, since the lattice point 430 is in the second column and the sixth row, the lattice points 432a, 432b, 432c, 432d, 432e, 432f, and 432g located in the 2 ± 1 column and the 6 ± 1 row are adjacent to each other. Calculate as a point.

  However, if the second column and the seventh row are the selected grid points, the grid points located in the 2 ± 1 column and the 7-1th row are calculated as adjacent grid points. Next, the control unit 226 calculates a region surrounded by the calculated lattice points as a region deformed by the warping process. For example, in this embodiment, a region 431 that is a region surrounded by 432a, 432b, 432c, 432d, 432e, 432f, and 432g is obtained.

  Next, in S350, the control unit 226 controls the image processing unit 223a, and an OSD menu for moving the selected lattice point 430 by warping outside and in the vicinity of the region 431 deformed by warping. Is output. For example, the OSD menu is output to the area immediately above the area 431. However, it does not necessarily have to be directly above, and if possible, the data may be output directly below the region 431 or to the left and right regions. Thus, the OSD menu may be output anywhere as long as it does not overlap the calculated area 431 and is in the vicinity of the area 431.

  An example of the projected image 102 and the OSD menu at this time is shown in FIGS. 4 (d) and 4 (e). FIG. 4D shows a state where the OSD menu 435 is output to an area immediately above the area 431. The OSD menu 435 in FIG. 4E shows an example of the OSD menu displayed when the selected grid point 430 is moved. At this time, the user of the liquid crystal projector 202a operates the remote controller 400 in accordance with the description of the OSD menu 435, and inputs the amount of movement of the grid points by warping.

  In step S <b> 360, the control unit 226 controls the image processing unit 223 to execute warping based on the movement amount of the grid points read from the operation unit 227. The warping process is applied to the input image input to the liquid crystal projector 202a from the start of the operation flowchart. When the execution of S360 is completed, the operation flow of this embodiment is completed.

  As described above, according to the present invention, when the warping parameter adjustment is performed in the liquid crystal projector, the OSD menu is displayed near the warping target area while preventing the warping target area from overlapping the OSD menu. The effect which reduces the complexity of this can be obtained.

[Example 2]
The present invention can also be applied to a second embodiment obtained by modifying the first embodiment. In the following, description will be made centering on the portions modified from the first embodiment.

<Overall configuration>
Since it is the same as Example 1, detailed description is abbreviate | omitted.

<Detailed configuration>
Since it is basically the same as the detailed configuration of the first embodiment, only the differences will be described. The difference from the detailed configuration of the first embodiment is the internal configuration and processing content of the image processing unit 223a. Details will be described later.

<Operation flow>
A detailed operation flow of the present invention in this embodiment will be described with reference to FIG.

  As a situation at the start of the operation flow of the present embodiment, a situation is assumed in which the liquid crystal projector 202a projects an image on the screen 101 as shown in FIG. However, unlike FIG. 1A, it is assumed that the warping setting operation is not being performed, and the liquid crystal projector 202 a is in a state of projecting an image input from the image signal source 200.

  The flowchart in FIG. 3B is a flowchart executed by the control unit 226 of the liquid crystal projector 202a. However, the point in time when the control unit 226 detects that the keystone correction button 413 of the remote controller 400 has been pressed in the normal projection state is the start point in FIG.

  In S410, control unit 226 controls image processing unit 223a to output an OSD menu 450 for starting trapezoidal distortion correction. An example of the OSD menu 450 at this time is shown in FIG.

  Next, in S420, the control unit 226 determines whether or not the vertex of the projection image 102 has been selected by the user of the liquid crystal projector 202a. If it is determined that it has been selected, the process proceeds to S430. If it is determined that it has not been selected, the process proceeds to S420 again to enter a waiting state. Here, vertex selection will be described. The user of the liquid crystal projector 202a operates the cross buttons 405a, 405b, 405c, 405d and the enter button 410 of the remote control 400 in accordance with the instructions described in the OSD menu 450 in FIG. Then, the user of the liquid crystal projector 202a selects a vertex that is moved by the trapezoidal distortion correction among the vertices of the projection image 102. Note that the contents of the frame 451 in FIG. 4F indicate that the user of the liquid crystal projector 202a has selected the vertex 451a shown in FIG.

  Next, in S430, the control unit 226 reads out the position information of the vertex selected by the user of the liquid crystal projector 202a from the operation unit 227 in S420. For example, information “upper left” is read. This vertex is a point moved by the trapezoidal distortion correction process.

  Next, in S440, the control unit 226 calculates a region that is likely to be visually recognized by the user when performing the trapezoidal distortion correction setting in the region of the projection image 102. An example will be described below. For example, when the control unit 226 reads information “upper left” in S430, the control unit 226 reads the side of the projection image 102 including the vertex 451a as indicated by reference numerals 456 and 457 in FIG. Is calculated as the region that is highly likely to be visually recognized.

  The reason for considering the area composed of the sides including the vertices read out in S430 as “an area that is highly likely to be visually recognized” is that “trapezoidal distortion correction is often used to align the position of the screen and the projected image. It is important to be able to confirm the outer shape of the image. The width of the “region that is highly likely to be visually recognized” may be determined as a fixed value (for example, one pixel width) regardless of the number of vertical and horizontal pixels of the projected image, or based on the number of vertical and horizontal pixels of the projected image. It may be determined (for example, it may be determined as a width corresponding to 20% of the number of horizontal pixels of the projection image).

  Next, in S450, the control unit 226 controls the image processing unit 223a to output an OSD menu for moving the selected vertex in the vicinity of the area calculated in S440 by trapezoidal distortion correction. For example, if the top left vertex is selected in S430, the OSD menu 458 as shown in FIG. 4 (i) is output to the area indicated by the frame 458a in FIG. 4 (g). At this time, the user of the liquid crystal projector 202a operates the remote controller 400 in accordance with the description of the OSD menu 458, and inputs the vertex movement amount due to the trapezoidal distortion correction.

  Next, in S460, the control unit 226 controls the image processing unit 223a, and performs trapezoidal distortion correction based on the vertex movement amount read from the operation unit 227. Note that when trapezoidal distortion correction is performed, the outer shape of the projected image 102 becomes a trapezoid as shown by a region 455 in FIG. 4H (however, the region 455 is an example). In accordance with such a change in the outer shape, the control unit 226 performs image processing so that the position where the OSD menu 458 is superimposed on the projected image is changed as needed (for example, superimposed on the position 458b in FIG. 4H). The unit 223a may be controlled. When the amount of keystone distortion correction is large, the OSD menu 458 may be superimposed on the area outside the projected image 455, as indicated by 458c in FIG. When the execution of S460 is completed, the operation flow of this embodiment is completed.

  According to the present embodiment described above, when performing trapezoidal distortion correction parameter adjustment, the OSD menu is displayed near the trapezoidal frame part while preventing the trapezoidal frame part of the deformed projection image from overlapping the OSD menu. The effect which reduces the complexity of doing can be acquired.

<Modification of this embodiment>
In the present embodiment, as exemplified in the OSD menu 458, the example in which the user specifies the deformation by the trapezoidal distortion correction in the form of the relative movement amount of the vertex has been described. However, the relative movement amount is not necessarily required, and a method in which the user designates the position of the vertex by an absolute coordinate may be adopted.

[Example 3]
The present invention can also be applied to a third embodiment obtained by modifying the first embodiment. In the following, description will be made centering on the portions modified from the first embodiment.

<Overall configuration>
Since it is the same as Example 1, detailed description is abbreviate | omitted.

<Detailed configuration>
Since it is basically the same as the detailed configuration of the first embodiment, only the differences will be described. The difference from the detailed configuration of the first embodiment is the internal configuration and processing content of the image processing unit 223a. Details will be described later.

<Operation flow>
A detailed operation flow of the present invention in this embodiment will be described with reference to FIG.

  As a situation at the start of the operation flow of the present embodiment, a situation is assumed in which the liquid crystal projector 202a is projecting an image on the screen 101. However, unlike FIG. 1A, it is assumed that the warping setting operation is not being performed, and the liquid crystal projector 202 a is in a state of projecting an image input from the image signal source 200.

  The flowchart in FIG. 3C is a flowchart executed by the control unit 226 of the liquid crystal projector 202a. However, the time point when the control unit 226 detects that the color adjustment button 414 of the remote controller 400 is pressed in the normal projection state is set as the start point in FIG.

  In S510, control unit 226 controls image processing unit 223a to output OSD menu 460 for starting color adjustment. An example of the OSD menu 460 at this time is shown in FIG.

  Next, in S520, the control unit 226 determines whether or not a hue for color adjustment has been selected by the user of the liquid crystal projector 202a. If it is determined that it has been selected, the process proceeds to S530, and if it is determined that it has not been selected, the process returns to S520 and enters a waiting state. Here, selection of the hue will be described. The user of the liquid crystal projector 202a operates the cross buttons 405a, 405b, 405c, 405d and the enter button 410 of the remote control 400 in accordance with the instructions described in the OSD menu 460 of FIG.

  Then, the user of the liquid crystal projector 202a selects a hue for color adjustment. Note that the pull-down menu in FIG. 4J shows that the user of the liquid crystal projector 202a is about to select hue / blue. Hereinafter, a case where blue is selected will be described as an example. Note that the color adjustment refers to a gradation correction process that is applied only to the image of the region having the hue selected in S520 in the projection image 102.

  Next, in S530, the control unit 226 reads the hue selected by the user of the liquid crystal projector 202a from the operation unit 227 in S520. For example, information indicating that “blue is selected as the hue” is read.

  Next, in S540, the control unit 226 calculates a region having the hue selected in S520 in the projection image 102. This is done, for example, by scanning the pixel gradation values for all the pixels of the projected image and extracting pixels whose hue is blue.

  Next, in S550, the control unit 226 controls the image processing unit 223a to output an OSD menu for performing color adjustment near the area calculated in S540. For example, in S540, the control unit 226 scans the projection image 110 shown in FIG. 4K received by the image receiving unit 221a. Assume that the projected image 110 is an image showing green grasslands and forests, gray mountains, white clouds, and blue sky.

  In this case, in S540, an area showing the blue sky is calculated by scanning the projection image 110. Then, the control unit 226 controls the image processing unit 223a to output an OSD menu 465 for performing color adjustment in the vicinity of a blue sky region whose hue is blue. At this time, the user of the liquid crystal projector 202a operates the remote controller 400 in accordance with the description of the OSD menu 465, and inputs color adjustment parameters.

  In step S560, the control unit 226 controls the image processing unit 223a and performs color adjustment based on the color adjustment parameters read from the operation unit 227. When the execution of S560 is finished, the operation flow of this embodiment is completed.

  According to the present embodiment, when performing color adjustment parameter adjustment for a specific hue on the OSD menu, the area where the color changes and the OSD menu do not overlap with each other, and the color changes near the area where the color changes. An effect of reducing the complexity of displaying the OSD menu can be obtained.

<Modification of this embodiment>
A description will be given of a modification in the case where, when the region having the selected hue is calculated in S540, this region is the entire projection image. In such a case, an area having a relatively high saturation is regarded as an “area having a selected hue”, and an area having a relatively small saturation is not regarded as an “area having a selected hue”. S540 is executed.

[Example 4]
The present invention can also be applied to a fourth embodiment obtained by modifying the first embodiment. In the following, description will be made centering on the portions modified from the first embodiment.

<Overall configuration>
Since it is the same as Example 1, detailed description is abbreviate | omitted.

<Detailed configuration>
Since it is basically the same as the detailed configuration of the first embodiment, only the differences will be described. The difference from the detailed configuration of the first embodiment is the internal configuration and processing content of the image processing unit 223a. Details will be described later.

<Operation flow>
A detailed operation flow of the present invention in this embodiment will be described with reference to FIG. As a situation at the start of the operation flow of the present embodiment, a situation is assumed in which the liquid crystal projector 202a projects an image on the screen 101 as shown in FIG. However, unlike FIG. 1A, it is assumed that the warping setting operation is not being performed, and the liquid crystal projector 202 a is in a state of projecting an image input from the image signal source 200.

  The flowchart in FIG. 3D is a flowchart executed by the control unit 226 of the liquid crystal projector 202a.

  In S620, control unit 226 controls operation unit 227 to determine whether or not contour emphasis button 415 on the remote controller has been pressed. If it is determined that the button has been pressed, the process proceeds to step S640. If it is determined that the button has not been pressed, the process proceeds to step S620 again to enter a wait state.

In S640, control unit 226 controls image processing unit 223a to detect the contour position included in the projection image. For example, the contour position is detected by applying a Sobel filter or a Prewitt filter to the projection image. Based on this result, a region having a contour in the projected image is calculated.

  In S650, the control unit 226 controls the image processing unit 223a, and outputs an OSD menu 470 for setting contour emphasis in a region near the contour calculated in S640 and having no contour. Let At this time, the user of the liquid crystal projector 202a sets the contour emphasis parameter according to the description of the OSD menu 470.

  In step S660, the control unit 226 reads the parameters set in step S650 from the operation unit 227, and controls the image processing unit 223a based on the read parameters to execute contour enhancement processing. When the execution of S660 is completed, the execution of the present embodiment is completed.

  According to the present embodiment described above, the OSD menu can be displayed near the contour portion while the contour portion included in the projection image and the OSD menu do not overlap when adjusting the parameters of the contour enhancement processing. The effect that it becomes easy is obtained.

<Modification of this embodiment>
A modified example will be described in which when the control unit 226 detects the contour position included in the projection image in S640, the contour exists in the entire projection image. In such a case, the OSD menu cannot be output to a region having no outline as in S650. Therefore, in such a case, S640 is executed assuming that a region having a relatively large number of detected contours is a region where a contour exists and a region having a relatively small number is regarded as a region having no contour.

[Example 5]
The present invention can also be applied to a fifth embodiment obtained by modifying the first embodiment. In the following, description will be made centering on the portions modified from the first embodiment.

<Overall configuration>
Since it is the same as Example 1, detailed description is abbreviate | omitted.

<Detailed configuration>
Since it is basically the same as the detailed configuration of the first embodiment, only the differences will be described. The difference from the detailed configuration of the first embodiment is the internal configuration and processing content of the image processing unit 223a. Details will be described later.

<Operation flow>
A detailed operation flow of the present invention in this embodiment will be described with reference to FIG. As a situation at the start of the operation flow of the present embodiment, a situation is assumed in which the liquid crystal projector 202a projects an image on the screen 101 as shown in FIG. However, unlike FIG. 1A, it is assumed that the warping setting operation is not being performed, and the liquid crystal projector 202 a is in a state of projecting an image input from the image signal source 200.

  The flowchart in FIG. 3E is a flowchart executed by the control unit 226 of the liquid crystal projector 202a.

  In S720, control unit 226 controls operation unit 227 to determine whether contrast button 416 on the remote control has been pressed. If it is determined that the button has been pressed, the process proceeds to step S740. If it is determined that the button has not been pressed, the process returns to step S720 to enter a waiting state.

  In step S740, the control unit 226 controls the image processing unit 223a to calculate a region composed of pixels having a large gradation value or pixels having a small gradation value in the projection image. When the value that the gradation value of the pixel can take is 0 to 255, for example, an area composed of pixels having a gradation value of less than 64 or 192 or more is calculated. However, the gradation boundary value used as a reference for calculation may be another value.

  In step S750, the control unit 226 controls the image processing unit 223a to set an OSD menu for setting contrast enhancement in a region that is composed of pixels near the intermediate gradation value calculated in step S740. 480 is output. To explain using the example given in the description of S740, an OSD menu 480 for setting contrast enhancement is set in a region that is in the vicinity of the region calculated in S740 and has a gradation value of 64 or more and less than 192. Output.

  At this time, the user of the liquid crystal projector 202a sets the contrast enhancement parameter according to the description of the OSD menu 480. As described above, by displaying the OSD menu while avoiding the low gradation portion and the high gradation portion, it is easy to visually recognize the region in which the gradation value is largely changed and the color tone is easily changed by adjusting the contrast enhancement. can get.

  In step S760, the control unit 226 controls the image processing unit 223a, and executes contrast enhancement processing based on the parameters set in step S750. When the execution of S760 is completed, the execution of this embodiment is completed.

  According to the present embodiment described above, when adjusting the parameters of the contrast enhancement process, the OSD menu is located near the area where the gradation greatly changes while preventing the OSD menu from overlapping the area where the gradation changes greatly. The effect that it becomes easy to display is obtained.

<Modification>
A modification in which the present embodiment is modified and applied to a case where the projected image is composed of only a high gradation portion will be described. Since the entire projection image has a high gradation, when the entire projection image is calculated in S740, the following is performed (in other words, the area of the intermediate gradation on which the OSD menu is superimposed is too small in S750 and the OSD menu is overwritten). If you can't superimpose, do the following: In S740, the control unit 226 sets a part of the area calculated in S740 that has a relatively large number of high gradation pixels per unit area as the area calculated in S740.

  The present embodiment can be modified and applied in the same way when the projected image is composed only of the gray scale portion.

200 Image signal source 202a Liquid crystal projector 210 Bus 211 CPU
212 Main storage device 213 Video controller 214 Network controller 215 Input / output interface 216 Auxiliary storage device 217a Image transmission unit 218a Communication unit 220 Bus 221a Image reception unit 222a Communication unit 223a Image processing unit 224a Optical system 225a Spatial modulation unit 226 Control unit 228a Storage Part 230 Network controller 240 ROM
241 RAM

Claims (6)

A projection device,
Image processing means for image processing a projection image projected by the projection device;
An affected area calculating means for calculating an area in the projected image affected by the image processing as an affected area;
Superimposed display means for displaying an on-screen display for displaying the set value of the image processing superimposed on a partial area of the projected image;
A superimposed display region determining unit having a function of determining a superimposed display region based on a result of the affected region calculation unit, and setting a region that is near the affected region and is not the affected region as the superimposed display region;
A projection apparatus comprising: The projection apparatus according to claim 1,
The image processing means includes
Area dividing means for dividing the projected image into a plurality of small areas;
Point selection means for selecting one or more vertices among the vertices of the plurality of small regions;
A small area deformation means for deforming one or more of the plurality of small areas by moving the vertex selected by the point selection means;
Pixel interpolation means for performing pixel interpolation processing on the area deformed by the small area deformation means based on the position of the vertex moved by the small area deformation means;
Have
The projection apparatus according to claim 1, wherein the influence area calculation means calculates an area deformed by the small area deformation means. The projection apparatus according to claim 1,
The image processing means includes
Coordinate information receiving means for receiving information indicating coordinates after coordinate change of one or more vertices of the vertices of the projection image;
Deformation means for deforming the projection image based on the information received by the coordinate information receiving means;
Have
The projection apparatus according to claim 1, wherein the influence area calculation unit calculates a position or area of an outline of the projection image in which movement occurs in accordance with the coordinate change. The projection apparatus according to claim 1,
The image processing is processing applied for each hue included in the projection image,
An image input means for outputting an input image input from the outside of the projection device to the image processing means as a projection image;
A hue selection means for selecting a hue;
Further comprising
The influence area calculation means calculates an area composed of pixels that are hues selected by the hue selection means among areas of the projection image;
The projection apparatus, wherein the image processing means performs gradation correction processing on pixels in the area calculated by the affected area calculation means. The projection apparatus according to claim 1,
The image processing is contour enhancement processing of the projection image,
An image input means for outputting an input image input from the outside of the projection device to the image processing means as a projection image;
Gradation difference threshold setting means for setting a threshold of gradation difference of pixels of the projected image;
Further comprising
The influence area calculation means calculates an area composed of pixels in which a gradation difference between adjacent pixels of the pixels constituting the projection image is equal to or greater than a threshold set by the gradation difference threshold setting means,
The projection apparatus, wherein the image processing means performs a process of changing a gradation value for pixels included in the area calculated by the affected area calculation means. A projection device,
Contrast adjustment means for adjusting contrast on a projection image projected by the projection device;
A gradation change area calculating means for calculating an area of the projected image in which a gradation value changes relatively greatly by contrast adjustment by the contrast adjusting means;
Superimposed display means for displaying an on-screen display that displays the setting value of the contrast adjustment superimposed on a partial area of the projection image;
An overlapping display region is determined based on the region calculated by the gradation change region calculation unit, and is a region near the region calculated by the gradation change region calculation unit and not the region calculated by the gradation change region calculation unit Superimposition display area determination means having a function of the superimposition display area,
Have
The projection apparatus characterized in that the gradation change area calculation means calculates an area composed of pixels having gradation values of high gradation or low gradation in the projection image.