JP2008092012A - Projector and correction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector in which a correction point is moved more efficiently when distortion of a projection image is corrected. <P>SOLUTION: The projector 100 comprises: a section 110 for inputting selection information of correction point, movement start designation information of correction point, and movement end designation information of correction point under such a situation that the distortion of a projection image is corrected by moving at least one correction point included in the projection image for adjusting the shape thereof; a section 140 for obtaining the correction point based on the selection information and creating an image for moving the correction point automatically in a predetermined moving direction when the movement start designation information is inputted and for creating an image under a state where movement of the correction point is stopped when the movement end designation information is inputted; and a section 190 for projecting an image created at the image creating section 140. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a projector and a correction method for correcting image distortion.

  As a technique for correcting the distortion of the projected image, a technique has been proposed in which the user designates four corners of the projected image for correction.

For example, in Japanese Patent Application Laid-Open No. 2003-304552, in order to correct distortion of a projected image, correction points are provided at four corners of the projected image, and the correction point is moved in accordance with an instruction from the operator, and according to the distance moved It describes that a projected image is corrected based on a correction parameter.
JP 2003-304552 A

  However, such a method takes time. In particular, when the projected image is greatly distorted, it is necessary for the user to perform an operation of moving each correction point to a desired position, which is very troublesome.

  In such a case, the user must press and hold the direction key on the remote controller or the projector's control panel after selecting the correction point, and the longer the movement distance, the longer the time for pressing the direction key. The time it takes to increase.

  An object of the present invention is to provide a projector and a correction method capable of moving a correction point more efficiently when correcting distortion of a projected image.

In order to solve the above problems, a projector according to the present invention provides:
In a situation in which distortion of the projection image is corrected by moving at least one correction point included in the projection image for adjusting the shape of the projection image, the correction point selection information and an instruction to start moving the correction point An input unit for inputting information and movement end instruction information of the correction point;
The correction point is grasped based on the selection information, and when the movement start instruction information is input, an image for automatically moving the correction point in a predetermined movement direction is generated, and the movement end instruction information is An image generation unit that generates an image in a state where movement of the correction point is stopped when input,
A projection unit that projects an image generated by the image generation unit;
It is characterized by including.

Further, the correction method according to the present invention includes:
A method of correcting distortion of a projected image by a projector,
The projector is
Inputting correction point selection information in a situation where distortion of the projection image is corrected by moving at least one correction point included in the projection image for adjusting the shape of the projection image;
A step of grasping a correction point to be moved based on the selection information;
Inputting the movement start instruction information of the correction point;
Generating an image for automatically moving the correction point in a predetermined movement direction based on the movement start instruction information;
Projecting the image;
Inputting the movement end instruction information of the correction point;
Generating an image in a state where movement of the correction point is stopped based on the movement end instruction information;
Projecting the image;
Is repeatedly executed until the correction of the distortion of the projected image is completed.

  According to the present invention, the projector can automatically move the correction point when there is a movement start instruction without monitoring a movement instruction continuation instruction. As a result, the user does not need to keep pressing the direction key or the like to give the instruction to continue the movement instruction, so the projector can reduce the user's trouble.

The input unit inputs, as the movement start instruction information, movement start instruction information in the X direction and movement start instruction information in the Y direction that intersects the X direction.
The image generation unit generates an image that automatically moves the correction point in the X direction when the movement start instruction information in the X direction is input, and includes the movement start instruction information in the Y direction. An image that automatically moves the correction point in the Y direction when it is input may be generated.

  According to this, since the projector can automatically move the correction point in two different directions, the distortion of the image can be corrected more efficiently, and the labor of the user can be further reduced.

  In addition, when the movement start instruction information in the same direction is continuously input without the movement start instruction information in the other direction being input, the image generation unit determines the number of continuous inputs of the movement start instruction information. You may produce | generate the image which reduces a moving speed, and moves automatically, so that it increases.

  According to this, the projector can prevent overcorrection by reducing the moving speed of the correction point as the number of times of continuous input of the movement start instruction information increases, and the user can correct in a shorter time. Therefore, the distortion of the image can be corrected more efficiently, and the labor of the user can be further reduced.

Further, the projector includes a storage unit that stores movable range data indicating a movable range of each correction point,
The image generation unit may generate an image that automatically moves the correction point in the reverse direction when the correction point reaches the limit of the movable range based on the movable range data.

  According to this, for example, even when the user misses the correction stop movement timing, the correction point can be automatically moved again to a desired point, so that the user can shorten the time. Since the correction can be performed, the distortion of the image can be corrected more efficiently, and the labor of the user can be further reduced.

The image generation unit generates a selection image for selecting the correction point,
The projection unit may project an image including the selected image.

  According to this, since the user can specify the correction point while viewing the selected image, it is easy to specify. Thus, the projector can correct the image distortion more efficiently because the user can correct the image in a shorter time, and the labor of the user can be further reduced.

  Hereinafter, an example in which the present invention is applied to a projector will be described with reference to the drawings. In addition, the Example shown below does not limit the content of the invention described in the claim at all. In addition, all of the configurations shown in the following embodiments are not necessarily essential as means for solving the problems described in the claims.

  In this embodiment, it is assumed that correction points are provided at the four corners of the projected image. The correction point is for correcting the shape of the projection image. When the user gives an instruction to move the correction point, the projector moves the correction point according to the instruction and deforms the projection image. Then project.

  FIG. 1 is a state transition diagram of correction points in the present embodiment.

  Each correction point is in an “unmovable state” in the initial state. When the user presses a numeric key for selecting a correction point of a remote controller (hereinafter referred to as a remote controller), the selected correction point transitions to a “movable state”.

  Then, when the user presses the direction key of the remote controller in the “movable state”, the selected correction point transitions to the “moving state”. In this embodiment, once the user presses the direction key, the correction point continues to move automatically in the designated direction. Further, the shape of the projected image changes as the correction point moves.

  Then, when the user presses the determination key on the remote controller in the “moving state”, the selected correction point transitions to the “unmovable state”.

  That is, the user can easily correct the distortion of the projected image by automatically moving the correction point by a key operation of the remote controller.

  Next, a functional block of a projector that implements such a function will be described.

  FIG. 2 is a functional block diagram of the projector 100 in this embodiment.

  The projector 100 includes an input unit 110 that inputs user operation information, an image generation unit 140 that generates various images, a projection unit 190 that projects images, and a storage unit 120 that stores various data. It is configured.

  In addition, the storage unit 120 stores movable range data 122 indicating the movable range of each correction point.

  In addition, you may implement the function of these each part using the following hardwares, for example.

  FIG. 3 is a hardware block diagram of the projector 100 in this embodiment.

  For example, the input unit 110 is an infrared light receiving unit 930 that receives infrared light from a remote controller, the storage unit 120 is a RAM 950, a ROM 960, etc., the image generation unit 140 is a CPU 910, an image processing circuit 970, etc., a projection unit 190 Alternatively, a liquid crystal panel 920 or the like may be used. Note that these units can exchange information with each other via the system bus 980.

  Next, a distortion correction procedure for correcting the distortion of the projected image will be described.

  FIG. 4 is a flowchart showing a distortion correction procedure in this embodiment.

  For example, the user selects “keystone correction” from an environment setting menu image provided as a function of the projector 100, and further selects “correction point correction”.

  When the selection information indicating the selection is input by the input unit 110, the projector 100 starts correcting the distortion of the projected image.

  First, the image generation unit 140 generates an image including the selected image, and the projection unit 190 projects the image (step S1).

  FIG. 5 is a diagram illustrating an example of the projected image 200 including the selected image 300 in the present embodiment.

  In the present embodiment, correction points 210-1 to 210-4 are set at the four corners of the projected image 200, respectively. The selection image 300 is an image for selecting one of the four correction points 210, and selection images 300-1 to 300-4 are provided corresponding to the correction points 210-1 to 210-4. .

  In this embodiment, the selected image 300 is displayed as an OSD (On Screen Display) image so as to be superimposed on the original image. In FIG. 5 and subsequent figures, the shape of the projected image 200 and the shape of the selected image 300 do not match, but only the selected image 300 is shown as a rectangle for easy understanding.

  The input unit 110 inputs operation information from the remote controller (step S2).

  The image generation unit 140 determines whether the operation information is selection information indicating selection of the selected image 300 (step S3). For example, if the remote control is provided with a numeric key indicating numbers 1 to 9 in order from the upper left in 3 rows and 3 columns, the user selects the upper left selection image 300-1 with the upper left numeric key 1 and the upper right number. The upper right selection image 300-2 can be selected with the key 3 and the lower left selection image 300-3 can be selected with the lower left numeric key 7 and the lower right selection image 300-4 with the lower right numeric key 9.

  In the case of selection information, the image generation unit 140 determines a correction point 210 to be moved based on the selection information (step S4). Then, the image generation unit 140 generates an image in which the selected selection image 300 is changed to another color, and the projection unit 190 projects the image. For example, when the normal color of the selection image 300 is green and the selection image 300-2 in the upper right is selected, the projector 100 displays only the selected selection image 300-2 in yellow and the other selection image 300. -1, 300-3, 300-4 may be displayed in green.

  As a result, the selected correction point 210-2 becomes “movable”.

  Then, for example, the user presses a down arrow key which is a kind of direction key of the remote controller.

  The input unit 110 inputs operation information from the remote controller (step S2).

  The image generation unit 140 determines whether the operation information is selection information indicating selection of the selected image 300 (step S3). If the operation information is not selection information, the image generation unit 140 determines whether the operation information is movement start instruction information. (Step S5).

  In this case, since the down arrow key is pressed, the operation information is movement start instruction information.

  When the operation information is movement start instruction information, the image generation unit 140 further determines whether or not movement start instruction information is continuously input (step S6).

  When the movement start instruction information in the same direction is continuously input, the image generation unit 140 performs setting to reduce the movement speed of the correction point 210 in order to prevent overcorrection and improve user operability ( Step S7).

  Then, the image generation unit 140 generates an image that automatically moves the correction point 210-2 in the “movable state” or “moving state” in the designated direction at the set moving speed, and the projection unit 190 projects the image (step S8). When the direction key is pressed, the correction point 210 in the “movable state” becomes the “moving state”.

  FIG. 6 is a diagram illustrating an example of a projected image 200 when moving in the Y direction in the present embodiment.

  For example, the downward arrow of the remote control corresponds to the Y direction, and the left arrow of the remote control corresponds to the X direction. In the present embodiment, the downward direction when the user observes the projected image 200 is the Y direction and the left direction is the X direction. However, the directions indicated by the X direction and the Y direction are not limited to these directions. . In this case, since the downward arrow is pressed, the correction point 210-2 moves in the Y direction, and the shape of the projected image 200 changes accordingly.

  In addition, a movable range is set in the correction point 210 by the movable range data 122. When the correction point 210 moves to the limit of the movable range based on the movable range data 122, the image generation unit 140 changes the movement direction of the correction point 210 in the reverse direction of the movement direction (in this case, the −Y direction). And move it.

  Then, the projector 100 continues the process of step S8 until some operation information is input (step S9). When the operation information is input, the projector 100 executes the processes after step S3.

  For example, when the correction point 210-2 moves in the Y direction and the upper side of the projected image 200 becomes horizontal, the user presses the “OK” button on the remote controller to temporarily stop the movement of the correction point 210-2. Press. In this case, pressing the “OK” button means a movement end instruction.

  When the movement end instruction information indicating the movement end instruction is input by the input unit 110, the image generation unit 140 stops the movement of the correction point 210-2 that is moving (step S10). As a result, the correction point 210-2 transitions from the “moving state” to the “unmovable state”.

  FIG. 7 is a diagram illustrating an example of the projected image 200 when moving in the X direction in the present embodiment.

  In this case, since the distortion of the projected image 200 is not eliminated only by completing the movement in the Y direction, as shown in FIG. 7, the user presses the left key of the remote controller and moves the correction point 210-2 to the X direction. Move to. As a result, the correction point 210-2 transitions from the “impossible movement state” to the “movable state” again. Since the movement in the X direction is the same as the movement in the Y direction, the description is omitted.

  Then, the projector 100 determines whether or not the correction has been completed (step S11). If the correction has not been completed, the processes of steps S1 to S11 are repeatedly executed. The method for determining whether or not the correction has been completed is a method for determining whether or not the user has pressed the correction completion instruction button. When all the correction points 210 are “incapable of movement” for a certain time (for example, 1 minute, etc.) ) Or the like may be employed.

  FIG. 8 is a diagram illustrating an example of the projected image 200 at the completion of correction in the present embodiment.

  The projector 100 can display the rectangular projection image 200 shown in FIG. 8 by moving the correction point 210-2 in the X direction in the state shown in FIG. 7 and stopping it at the position desired by the user.

  As described above, according to the present embodiment, the projector 100 can automatically move the correction point 210 when there is a movement start instruction without monitoring a movement instruction continuation instruction. Thereby, since the user does not need to keep pressing the direction key or the like to give the instruction to continue the movement instruction, the projector 100 can reduce the user's trouble and improve usability.

  Further, according to the present embodiment, the projector 100 can automatically move the correction point 210 in two different directions, so that the distortion of the image can be corrected more efficiently, and the user's effort can be further reduced. Can be reduced.

  In addition, according to the present embodiment, the projector 100 can prevent overcorrection by decreasing the moving speed of the correction point as the number of times of continuous input of the movement start instruction information increases, so that the user can shorten the time. Therefore, the image distortion can be corrected more efficiently, and the user's labor can be further reduced.

  Further, according to the present embodiment, the projector 100 moves in the opposite direction when the correction point 210 moves to the movement limit point, for example, when the user misses the movement stop timing of the correction point. However, the correction point can be automatically moved to a desired point again, and the user can correct the image in a shorter time, so that the distortion of the image can be corrected more efficiently. Can be further reduced.

  Further, according to the present embodiment, the user can designate the correction point 210 while looking at the selected image 300, so that the designation is easy. Accordingly, since the user can correct the projector 100 in a shorter time, the projector 100 can more efficiently correct the distortion of the image and can further reduce the user's trouble.

  In addition, application of this invention is not limited to the Example mentioned above, A various deformation | transformation is possible.

  For example, the image generation unit 140 moves the correction point 210 in the X direction after receiving an instruction to stop moving in the Y direction and further instructing to start moving in the X direction. When the movement is completed, the movement in the other direction may be started immediately.

  Further, the image generation unit 140 may generate an image indicating the movable range indicated by an arrow in FIG.

  According to this, the projector 100 can display the movable range in an easy-to-understand manner for the user.

  Further, the user operation is not limited to the remote control operation, and may be an operation of an operation button of the projector 100 main body. Further, the keys operated by the user are not limited to the above-described direction keys and the like, and arbitrary keys can be adopted.

  Further, the arrangement of the correction points 210 is not limited to the four corners of the projected image 200, and may be arranged at the midpoint of each side of the projected image 200 or the like. Further, the number of correction points 210 is not limited to four, and may be three or less, or five or more.

  In the above-described embodiment, the projector 100 moves only one correction point 210 by one correction. Of course, two or more correction points 210 may be moved by one correction.

  The image generation unit 140 may combine the selected image 300 with the original image. That is, the selected image 300 is not limited to the OSD format.

  The projector 100 is not limited to a liquid crystal projector. For example, a projector using a DMD (Digital Micromirror Device) developed by Texas Instruments, Inc., a CRT (Cathode Ray Tube) projector, an organic EL (Electro Luminescence) is used. The projector used may be used.

It is a state transition diagram of the correction point in a present Example. It is a functional block diagram of the projector in a present Example. It is a hardware block diagram of the projector in a present Example. It is a flowchart which shows the distortion correction procedure in a present Example. It is a figure which shows an example of the projection image containing the selection image in a present Example. It is a figure which shows an example of the projection image at the time of the Y direction movement in a present Example. It is a figure which shows an example of the projection image at the time of the X direction movement in a present Example. It is a figure which shows an example of the projection image at the time of the completion of correction | amendment in a present Example.

Explanation of symbols

  100 projector, 110 input unit, 120 storage unit, 122 movable range data, 130 correction unit, 140 image generation unit, 190 projection unit, 200 projection image, 210 correction point, 300 selection image

Claims (6)

In a situation in which distortion of the projection image is corrected by moving at least one correction point included in the projection image for adjusting the shape of the projection image, the correction point selection information and an instruction to start moving the correction point An input unit for inputting information and movement end instruction information of the correction point;
The correction point is grasped based on the selection information, and when the movement start instruction information is input, an image for automatically moving the correction point in a predetermined movement direction is generated, and the movement end instruction information is An image generation unit that generates an image in a state where movement of the correction point is stopped when input,
A projection unit that projects an image generated by the image generation unit;
Including a projector. The projector according to claim 1, wherein
The input unit inputs, as the movement start instruction information, movement start instruction information in the X direction and movement start instruction information in the Y direction that intersects the X direction;
The image generation unit generates an image that automatically moves the correction point in the X direction when the movement start instruction information in the X direction is input, and includes the movement start instruction information in the Y direction. A projector that generates an image for automatically moving the correction point in the Y direction when input. The projector according to claim 2,
When the movement start instruction information in the same direction is continuously input without inputting the movement start instruction information in the other direction, the image generation unit increases the number of times of continuous input of the movement start instruction information. A projector that generates an image that is automatically moved at a reduced moving speed. The projector according to any one of claims 1 to 3,
A storage unit for storing movable range data indicating the movable range of each correction point;
The image generation unit generates, based on the movable range data, an image that automatically moves the correction point in the reverse direction when the correction point reaches the limit of the movable range. . The projector according to any one of claims 1 to 4,
The image generation unit generates a selection image for selecting the correction point,
The projector projects the image including the selected image. A method of correcting distortion of a projected image by a projector,
The projector is
Inputting correction point selection information in a situation where distortion of the projection image is corrected by moving at least one correction point included in the projection image for adjusting the shape of the projection image;
A step of grasping a correction point to be moved based on the selection information;
Inputting the movement start instruction information of the correction point;
Generating an image for automatically moving the correction point in a predetermined movement direction based on the movement start instruction information;
Projecting the image;
Inputting the movement end instruction information of the correction point;
Generating an image in a state where movement of the correction point is stopped based on the movement end instruction information;
Projecting the image;
Is repeatedly executed until the correction of the distortion of the projected image is completed.

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