JP2009049862A - Shape distortion correction support system for projection image, shape distortion correction support method for projection image, and projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shape distortion correction support system for a projection image in which shape distortion of the projection image projected from a projector can be highly accurately recognized visually and quantitatively. <P>SOLUTION: A shape distortion correction support system 1 for a projection image includes: a chart image generating means 12, which generates a chart image for correcting shape distortion of the projection image; a chart image display means 13 for causing a projector 3 to project the chart image generated by the chart image generating means 12; an imaging means 4 for capturing the projection image projected from the projector 3; a sensing image analyzing means 14 for analyzing a sensing image captured by the imaging means 4, to acquire the coordinates of the sensing image; and a blended image display means 15 for displaying, on the projector 3, a blended image, obtained by blending the sensing image analyzed by the sensing image analyzing means 14 and the chart image. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a projection image shape distortion correction support system, a projection image shape distortion correction support method, and a projector.

2. Description of the Related Art Conventionally, in a projector that projects an optical image by modulating a light beam emitted from a light source according to image information and projects it, the shape distortion of the projected image may occur due to the positional relationship between the projection surface and the projector. There is known a projector having a function capable of correcting the shape distortion of a projected image without moving the position.
For example, in Patent Document 1, an IC chip storing various setting parameters suitable for an installation environment is prepared, and when a projector is installed, the setting parameters in the IC chip are read into the projector wirelessly. Operation settings are performed internally according to various setting parameter values. However, since the setting parameters include setting parameters related to shape distortion correction (keystone correction), the shape distortion is automatically set when the projector is installed. A technique for performing the correction is disclosed.
On the other hand, in Patent Document 2, position information of a viewer who sees the display means is acquired, and a distortion image generated according to the position of the viewer is generated according to the acquired position information of the viewer. A technique is disclosed that allows a viewer to view an image without distortion by displaying the image.

JP 2005-164930 A JP 2007-65541 A

However, in the technique described in the above-mentioned patent document, the quality determination as a result of correcting the shape distortion is not strictly performed, and only a determination based on a human sense that the image is displayed in a substantially square shape is made. There is a problem.
There is also a problem that the standard is not quantified.
Such problems do not pose a problem when viewing TV images or presentation data. However, when design data such as CAD is displayed, display accuracy of less than 1% of distortion is required. Therefore, there is a demand for quantitative recognition with high accuracy.

  An object of the present invention is to provide a shape distortion correction support system for a projection image, a shape distortion correction support method for a projection image, which can visually and quantitatively recognize the shape distortion of a projection image projected from a projector, And providing a projector.

A projection image shape distortion correction support system according to the present invention,
A projection image shape distortion correction support system for correcting shape distortion of a projection image projected from a projector,
Chart image generating means for generating a chart image for correcting the shape distortion of the projected image;
Chart image display means for projecting the chart image generated by the chart image generation means to the projector;
Imaging means for imaging a projected image projected from the projector;
The image processing apparatus includes a blend image display unit that causes the projector to display a blend image obtained by blending the sensing image captured by the image capturing unit and the chart image.

  According to the present invention, the chart image generated by the chart image generating unit is projected from the projector by the chart image displaying unit, the sensing image is captured by the imaging unit, and the sensing image is obtained by the blend image displaying unit. And the chart image are blended and displayed on the projector. Therefore, it is possible to easily recognize the shift in coordinates between the chart image that gives the original display position and the sensing image that includes the shape distortion generated in the projection image. A correction amount can be obtained, and a highly accurate adjustment of a distortion amount of less than 1% can be performed.

In the present invention, it is preferable to include an image deformation means for deforming any one of the chart image and the sensing image.
Here, the image deformation means can be configured to display a GUI (Graphic User Interface) on the projection image and prompt the viewer to input the deformation amount while viewing the projection image. It is also possible to calculate the amount of deviation of the coordinates and automatically calculate the amount of deformation according to the amount of deviation.
According to this invention, since the projection image can be deformed by the deformation correction amount corresponding to the shape distortion amount of the projection image by the image deformation means, the shape distortion of the projection image can be corrected appropriately.

In the present invention, it is preferable to include a sensing image analysis unit that analyzes the sensing image captured by the imaging unit and acquires the coordinates of the sensing image.
According to the present invention, since the sensing image captured by the imaging unit is analyzed by the sensing image analysis unit and the coordinates of the sensing image can be acquired, the amount of deviation between the coordinate of the chart image and the coordinate position of the sensing image is expressed numerically. Therefore, the shape distortion can be corrected with higher accuracy.

In the present invention, it is preferable to include a shape distortion evaluation unit that evaluates the shape distortion state of the image projected from the projector based on the coordinates of the chart image and the coordinates of the sensing image.
Here, the evaluation of the shape distortion by the shape distortion evaluation means can be performed by calculating the distance difference between the coordinates of the chart image and the coordinates of the sensing image in a certain coordinate space and integrating the distances. It is possible to evaluate by calculating the mean square error between the position coordinates of and the position coordinates of the sensing image.
According to the present invention, since the positional distortion based on the geometric distortion of the chart image and the sensing image can be grasped as a numerical value by the geometric distortion evaluating means, the geometric distortion of the projected image can be deformed and corrected with higher accuracy. .

In the present invention, when the chart image is configured by arranging high-luminance areas on a low-luminance background image in a dotted or checkered pattern, the high-luminance in the blend image displayed by the chart image When the distance obtained from the position coordinates of the area and the position coordinates of the high-brightness area in the blend image displayed by the corresponding sensing image falls below a predetermined threshold, the display is changed to a different color and displayed. It is preferable that a color display changing unit is provided.
Here, it is preferable that the different colors be easily visible to the viewer. If the high-luminance areas of the chart image and the sensing image are configured in white, for example, the overlapping area may be changed to red. It is done.
According to the present invention, the color display changing unit displays the portion of the chart image and the sensing image where the position coordinate is less misaligned in different colors, so that the position coordinate misalignment caused by the shape distortion can be easily visually confirmed. It is possible to adjust the deformation correction by the viewer easily and with high accuracy.

The present invention can be configured not only as the above-described projection image shape distortion correction support system, but also as a projection image shape distortion correction support method or a projector.
Specifically, the shape distortion correction support method of the projected image according to the present invention,
A method for supporting shape distortion correction of a projected image for correcting shape distortion of a projected image projected from a projector,
Generating a chart image for correcting the shape distortion of the projected image;
A procedure for projecting the generated chart image on the projector;
A procedure for imaging an image projected from the projector using an imaging means;
A procedure for displaying a blended image obtained by blending the captured sensing image and the chart image is performed.

The projector according to the present invention is
A projector that modulates a light beam emitted from a light source according to image information to form an optical image, and projects an enlarged image,
Chart image generating means for generating a chart image for correcting the shape distortion of the projected image that has been enlarged and projected;
Chart image display means for projecting the chart image generated by the chart image generation means;
Imaging means for imaging a projected image projected from the projector;
The image processing apparatus includes a blend image display unit that displays a blend image obtained by blending the sensing image captured by the image capturing unit and the chart image.
According to these inventions, it is possible to enjoy the same operations and effects as those described above, and according to the invention relating to the projector, the shape distortion correction can be easily performed with high accuracy in a state where an image is projected from the projector. It can be carried out.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[First Embodiment]
(1) Overall System Configuration FIG. 1 shows a projected image shape distortion correction support system 1 according to the first embodiment of the present invention. The shape distortion correction support system 1 includes a computer 2, a projector 3 connected to an input / output port such as a USB of the computer 2 with a cable or the like, and a CCD camera 4.
The computer 2 includes a general-purpose computer as a basic configuration and includes a CPU (Central Processing Unit) 6, a memory 7, a GPU (Graphics Processing Unit) 8, a keyboard 9, and a hard disk 10 that can communicate with each other via a bus 5. The bus 5 is communicably connected to an image processor 11 that performs the shape distortion correction support processing of the present invention.

The projector 3 is an optical device that modulates the image information output from the computer 2 in accordance with the image to form an optical image and projects it onto the screen Sc. The projection control circuit 31, the liquid crystal panel 32, the light source device 33, And a projection lens 34.
The projection control circuit 31 includes a block that performs image processing of input image information, a block that performs input / output control of the entire projector 3, a block that performs drive control of the liquid crystal panel 32, and a block that performs drive control of the light source device 33. Broadly divided.
The liquid crystal panel 32 includes an image forming area in which a plurality of pixels are arranged in a matrix, and performs gradation display according to image information input by each pixel.

The liquid crystal panel 32 includes a configuration in which liquid crystal is sealed between a pair of transparent substrates, and the liquid crystal is driven by TFTs (Thin Film Transistors) formed on one substrate, and each light incident side and light emission side Although an illustration is omitted, an incident-side polarizing plate and an emission-side polarizing plate are provided, and the amount of light emitted from the emission-side polarizing plate is adjusted by controlling the orientation of the liquid crystal using the TFT as a switching element. This creates a gradation display according to the image information. Although not shown in FIG. 1, three liquid crystal panels 32 are provided, and each liquid crystal panel 32 performs modulation according to each color light of red, blue, and green.
The light source device 33 includes a light source lamp composed of a discharge arc tube and a reflector, and an integrator lens as a uniform illumination optical system and a dichroic as a color separation optical system are included in the optical path of a light beam emitted from the light source device 33. A light beam emitted from the light source device 33 with a mirror is made uniform in in-plane illuminance, and is separated into red light, green light, and blue light, and enters each liquid crystal panel 32.

The CCD camera 4 as an imaging unit images a projection image projected on the screen Sc from the projector 3 and outputs it to the computer 2 as a sensing image. The CCD camera 4 includes an imaging processing circuit 41, a CCD (Charge Coupled Device) 42, and an imaging lens 43.
The imaging processing circuit 41 is a part that performs image processing of an image captured by the CCD 42, and performs gamma correction processing, color unevenness, brightness unevenness, and the like based on the LUT on the image signal that has been subjected to photoelectric conversion processing by the CCD 42. Correction processing is performed and converted into a sensing image with good color reproducibility.
The CCD 42 is a portion that detects the amount of light of an optical image incident through the imaging lens 43 and performs photoelectric conversion to generate an image signal, and has a configuration in which a plurality of detection pixels are arranged in a plane.

(2) Detailed Configuration of Image Processing Processor 11 The image processing processor 11 described above includes a chart image generation unit 12, a chart image display unit 13, a sensing image analysis unit 14, and a blend image display unit as programs operating on the arithmetic processing unit. 15 and an image transformation unit 16 and a color display change unit 17.
The chart image generation unit 12 is a part that generates a chart image based on information such as “number of grid points (vertical / horizontal)” and “presence / absence of grid lines” specified by the viewer. When “vertical 7 and no grid line” is designated, as shown in FIG. 2, a chart image G1 in which a plurality of grid points A2 with high luminance is displayed on the background image region A1 with low luminance in the image forming area is generated. The chart image generation unit 12 causes the chart image G1 to carry the number of grid points and the position coordinates of each grid point in the image as metadata.
The chart image display unit 13 is a part that outputs the chart image generated by the chart image generation unit 12 to the projector 3 side and displays the chart image on the projector 3.

The sensing image analysis unit 14 analyzes the sensing image output from the CCD camera 4 and calculates the coordinates of the sensed lattice points. The image analysis by the sensing image analysis unit 14 is performed according to the procedure of the flowchart shown in FIG.
First, the sensing image analysis unit 14 acquires the maximum luminance pixel and the minimum luminance pixel in the sensing image, sets the intermediate luminance as a threshold value, and based on this threshold value, calculates the second of all the pixels in the sensing image. A valuation process is performed (process ST1).
Next, the sensing image analysis unit 14 acquires a region where the maximum luminance value of the binarized image is continuous, and performs labeling for each region (processing ST2).
Finally, the sensing image analysis unit 14 sets the maximum luminance value in each area of the sensing image as the coordinates of the area based on the area partitioned by the labeling process (process ST3). In setting the coordinates, the position of the center of gravity may be used as the coordinates based on the outline of each area labeled using the binarized image.

The blend image display unit 15 superimposes the chart image generated by the chart image generation unit 12 and the sensing image captured by the CCD camera 4 and analyzed by the sensing image analysis unit 14, and displays the blend image as a blend image. It is a part to be made. The blend ratio of the chart image and the sensing image is set on the GUI displayed on the projection image by the image deforming unit 16 described later.
The blend image display unit 15 in the present embodiment is configured to blend the chart image and the sensing image analyzed by the sensing image analysis unit 14, but is not limited thereto, and is obtained by imaging. The sensing image may be blended with the chart image as it is.
The image deformation unit 16 is a part that presents a GUI for prompting the viewer to set a deformation correction value on the projection image of the projector 3 and prompts the deformation correction operation. Specifically, as shown in FIG. Window G2 is displayed on the projected image. The viewer operates a mouse (not shown) connected to the computer 2 to move the levers of the portions described as “rotation” and “movement” about the X axis, the Y axis, and the Z axis in this window. It is possible to set a deformation correction value for correcting the shape distortion by moving left and right or changing the numerical value with a button of the combo box. Note that the X axis means the horizontal axis when facing the projection image of the projector 3, the Y axis means the vertical axis, and the Z axis means the normal direction axis of the projection image.

Further, in the window G2 displayed on the projection image by the image deforming unit 16, in addition to the above-described setting of the deformation correction value, by operating the lever and combo box in the “display” portion at the center of the window G2 with the mouse, A blend ratio between the chart image and the sensing image captured by the CCD camera 4 can be set. The ratio between the chart image and the sensing image in the blend image is set by the following formula (1).
Blend image = Blend ratio × Sensing image + (1-Blend ratio) × Chart image (1)

  The color display changing unit 17 is a part that changes the color of the part and displays it on the blended image when the coordinate position deviation between the chart image and the sensing image falls within a certain threshold. Specifically, the color display changing unit 17 includes the position coordinates of each grid point made up of metadata carried in the chart image and the position of each grid point calculated by the coordinate position calculation process ST3 of the sensing image analysis unit 14. In contrast to the coordinates, the color of the grid point whose distance between the corresponding grid points is equal to or less than a predetermined threshold is changed to a color such as red.

  For example, in the blend image G3 shown in FIG. 5, the grid obtained from the position coordinates of the grid points of the chart image in the coordinate space set on the blend image G3 and the position coordinates of the grid points of the corresponding sensing image When the point-to-point distance is equal to or less than a predetermined threshold, the grid point A3 is displayed in red (the grid points displayed with diagonal lines in FIG. 5). On the other hand, at the lattice point A4 at the end of the blend image G3, the distance between lattice points obtained from the coordinate position of the chart image and the position coordinate of the corresponding lattice point of the sensing image is larger than the threshold value. It has not changed. Note that the threshold value is preferably set with reference to a difference in distance such that the amount of distortion of the projected image is less than 1%.

(3) Operation of Shape Distortion Correction Support System 1 Next, the operation of the shape distortion correction support system 1 having the above-described configuration will be described based on the flowchart shown in FIG.
First, the chart image generation unit 12 generates the chart image G1 based on the information of “number of grid points (vertical / horizontal)” and “presence / absence of grid lines” specified in advance by the viewer (step S1). At this time, the chart image G1 carries the designated number of grid points and the position coordinates in the image of each grid point.
The chart image display unit 13 outputs the generated chart image to the projector 3, and displays the chart image G1 from the projector 3 as a projection image (step S2).

When the chart image G1 is displayed as a projection image from the projector 3, the projection image is captured by the CCD camera 4 (step S3), and the captured sensing image is output to the image processor 11 via the bus 5 of the computer 2. .
The sensing image analysis unit 14 analyzes the sensing image including the binarization process, the labeling process, and the position coordinate calculation process as described above based on the sensing image sent from the CCD camera 4 (step S4). .
The blend image display unit 15 blends and displays the chart image G1 generated by the chart image generation unit 12 and the sensing image captured by the CCD camera 4 (step S5). The blending of the chart image and the sensing image may be performed by superimposing and displaying both images with one point at the corner of the chart image G1 and the blend image as a reference.

Based on the grid point coordinate position of the sensing image calculated by the sensing image analysis unit 14 and the grid point coordinate position of the chart image carried by the chart image generation unit 12, the color display changing unit 17 The distance is calculated (procedure S6).
Subsequently, the color display changing unit 17 determines whether or not the distance between the corresponding grid points is equal to or less than a predetermined threshold value, and changes the color of the grid points that are equal to or less than the predetermined threshold value to red. Procedure S7).
The viewer determines whether the shape distortion of the projected image is less than 1% while observing the number of grid points whose color has been changed by the color display changing unit 17 and the overlap between the grid points of the chart image and the sensing image. (Procedure S8) The window G2 displayed by the image deforming unit 16 is operated with a mouse or the like to set the deformation correction value of the sensing image (procedure S9).
Here, the deformation correction by the operation of the image deforming unit 16 can be performed by setting a value in a direction opposite to the direction of displacement of the position coordinates between the lattice points visually recognized as the shape distortion. It can be set as shown in Table 1 below.

When the setting of the deformation correction value by the viewer is completed, the image deformation unit 16 deforms the sensing image according to the set deformation correction value (step S10), and thereafter the steps S3 to S10 are repeated so that the viewer If it is determined that the shape distortion amount between the chart image and the sensing image is 1% or less, the adjustment is terminated.
In this embodiment, since the viewer visually grasps and adjusts the shape distortion of the projection image based on the positional position coordinate shift between the grid points of the chart image and the sensing image, the viewer can By operating the deformation unit 16, the shape distortion of the projected image can be corrected with high accuracy.
In particular, when the distance between the corresponding grid points of the chart image and the sensing image is equal to or less than a predetermined threshold by the color display changing unit 17, the color of the grid points is changed and displayed. Just by looking at the projected image, the state of shape distortion can be recognized immediately, and the shape distortion of the projected image can be corrected quickly and with high accuracy.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In the following description, parts that have already been described are assigned the same reference numerals and description thereof is omitted.
In the projection image shape distortion correction support system 1 according to the first embodiment described above, basically, the viewer determines whether or not the shape distortion amount of the projection image projected on the screen Sc is 1%. It was judged visually while observing the blend image.
On the other hand, as shown in FIG. 7, in the shape distortion correction support system 1A for the projected image according to the second embodiment, the image processor 11 performs projection based on the coordinates of the chart image and the coordinates of the sensing image. A shape distortion evaluation unit 19 that evaluates the shape distortion state of an image is provided, and the viewer is different in that the determination is made with reference to the evaluation result of the shape distortion evaluation unit 19.
Further, in the shape distortion correction support system 1 for the projected image according to the first embodiment, the image deforming unit 16 deforms the sensing image captured by the CCD camera 4.
In contrast, the image deforming unit 18 in the projection image shape distortion correction support system 1 </ b> A according to the second embodiment is different in that it performs deformation correction of a chart image instead of a sensing image. These will be described in detail below.

Based on the position coordinates of the grid points in the chart image and the position coordinates of the grid points of the sensing image calculated by the sensing image analysis unit 14, the shape distortion evaluation unit 19 shifts the position coordinates of the chart image and the sensing image. Is calculated in the form of an evaluation value, and this value is displayed on the projection image. Specifically, as an evaluation function for performing the evaluation, it is conceivable to take a mean square error of the distance between the lattice points, and the evaluation can be performed using the following equation (2). When the evaluation value according to the following equation (2) is calculated, the shape distortion evaluation unit 19 displays the calculated evaluation value in a region A5 on the blend image G4 as shown in FIG.
The viewer performs the image deformation operation while observing the shift of the lattice points in the blend image G4 and confirming the change in the numerical value.

The image deforming unit 18 deforms and corrects the positional coordinate shift between the chart image and the sensing image by deforming the chart image. Specifically, the image deforming unit 18 performs deformation according to the deformation correction value set by the viewer operating the chart image generated by the chart image generating unit 12, and writes it to the frame buffer. , It is projected on the projector 3. Note that, unlike the first embodiment, in this embodiment, the coordinate position deviation amount itself of the chart image and the sensing image is the deformation correction value.
The display of the window for performing other GUIs, the operation method of the viewer, and the like are the same as in the first embodiment.

Next, the operation of the projected image distortion correction support system according to the present embodiment will be described based on the flowchart shown in FIG.
Since the generation of the chart image (procedure S1) to the display of the blend image (procedure S5) are the same as those in the first embodiment, the description thereof is omitted.
In the second embodiment, the geometric distortion evaluation unit 19 calculates a distance between lattice points (procedure S11), and calculates an evaluation value based on the above equation (2) (procedure S12).
The shape distortion evaluation unit 19 displays the evaluation value in the area A5 on the blend image G4.

The viewer determines whether or not the shape distortion of the projected image is less than 1% while checking the state of the coordinate position deviation between the chart image and the sensing image and the displayed evaluation value (step S8). Similarly to the embodiment, the window displayed on the image deformation unit 18 is operated with a mouse or the like to set a deformation correction value (step S9).
When the deformation correction value is set, the image deformation unit 18 deforms the chart image based on the deformation correction value (procedure S14), and hereinafter, until the shape distortion becomes less than 1% as in the first embodiment. Repeat step 3 to step S14.
According to this embodiment, in addition to the effects described in the first embodiment, the shape distortion evaluation unit 19 displays the evaluation value on the blend image G4, so that the viewer can view the chart image and the sensing image. Since the deviation of the position coordinates can be grasped not only visually but also as a numerical value, the shape distortion of the projected image can be deformed and corrected with higher accuracy.

[Third Embodiment]
Next, a third embodiment will be described.
In the first embodiment described above, the image processor 11 that executes the method for assisting the correction of the shape distortion of a projected image according to the present invention is built in the computer 2 to which the projector 3 is connected, and the chart image and blending from the computer side to the projector. It was configured to output an image.
On the other hand, as shown in FIG. 10, the projection image shape distortion correction support method according to the third embodiment incorporates the image processor 11 and the CCD camera 4 in the projector 50, and projects the projected image inside the projector 50. The difference is that the shape distortion support method is implemented. Hereinafter, the third embodiment will be described in detail.

As shown in FIG. 10, the projector 50 includes a light source control circuit 51 and an image processing circuit 52 that constitute a projection control circuit, and also includes a CCD camera 4 and an image processing processor 11.
The projector 50 performs frequency conversion and the like on the RGB signal input from the video input terminal 53 such as a USB by the converter 54, accumulates it as a frame unit image signal in the frame buffer 55, and then outputs it to the image corrector 56. The image corrector 56 performs gradation correction, luminance unevenness correction, color unevenness correction, and the like according to the liquid crystal panel 32, and drives and controls the liquid crystal panel 32.

Similar to the first embodiment, the CCD camera 4 includes a CCD 42 and an imaging processing circuit 41, and a sensing image processed by the imaging processing circuit 41 is output to the image processing processor 11.
As in the case of the first embodiment, the image processor 11 includes a chart image generation unit 12, a chart image display unit 13, a sensing image analysis unit 14, a blend image display unit 15, an image deformation unit 16, and a color display change unit. 17.
When the image processor 11 executes the shape distortion correction support method for the projected image, first, the chart image display unit 13 writes the chart image generated by the chart image generation unit 12 in the frame buffer 55, thereby the screen Sc. A chart image is displayed above.

Next, the CCD camera 4 captures the chart image projected on the screen Sc and outputs it to the image processor 11 as a sensing image.
The blend image display unit 15 of the image processor 11 blends the chart image generated by the chart image generation unit 12 and the input sensing image, writes the blend image to the frame buffer 55, and the blend image is displayed on the screen Sc. Project to.
Other configurations and operations of the image processor 11 are the same as those in the first embodiment, and are omitted.

According to the present embodiment, in addition to the effects described in the first embodiment, since the CCD camera 4 and the image processor 11 are built in the projector 50, the shape distortion correction of the projected image according to the present invention can be performed with the projector 50 alone. The support method can be implemented, and the deformation correction of the shape distortion can be performed with high accuracy.
In addition, when combined with the conventional simple distortion correction, in a normal display method such as home theater, presentation, etc., the deformation correction is performed by the conventional distortion correction method, and high accuracy display such as CAD data is required. The shape distortion of the projected image can be corrected with high accuracy by using the shape distortion correction support method of the present invention.

[Modification of Embodiment]
The present invention is not limited to the embodiments described above, and includes modifications as described below.
In the first embodiment described above, the chart image G1 is configured by simply arranging circular lattice points in a dotted pattern. However, the present invention is not limited to this, and as shown in FIG. The shape of the grid point A6 may be rectangular, and when the blend image is displayed by the blend image display unit, a blend image may be displayed by adding a scale A7. In this case, the coordinate position shift between the chart image and the sensing image can be directly visually recognized by the scale A7.
Moreover, the shape of the chart image is not limited to the grid points arranged in the form of dots, but as shown in FIG. 12, the chart image G5 in which the high luminance region and the low luminance region are arranged in a checkered pattern is adopted. Also good.

Further, in the first embodiment described above, the GUI window G2 by the image deforming unit 16 is displayed on the projection image. However, the present invention is not limited to this, and the illustration is omitted in FIG. However, a GUI window may be displayed on a display connected to the computer 2, and the viewer may operate while looking at the display to correct the shape distortion of the projected image.
In addition, the specific structure, shape, and the like when implementing the present invention may be other structures as long as the object of the present invention can be achieved.

The block diagram showing the structure of the shape distortion correction assistance system of the projection image which concerns on 1st Embodiment of this invention. The schematic diagram showing the chart image in the said embodiment. The flowchart showing the process of the sensing image analysis part in the said embodiment. The schematic diagram showing the window for GUI displayed by the image deformation | transformation part in the said embodiment. The schematic diagram showing the blend image in the said embodiment. The flowchart showing the effect | action of the said embodiment. The block diagram showing the structure of the shape distortion correction assistance system of the projection image which concerns on 2nd Embodiment of this invention. The schematic diagram showing the blend image in the said embodiment. The flowchart showing the effect | action of the said embodiment. The block diagram showing the structure of the projector which concerns on 3rd Embodiment of this invention. The partial schematic diagram showing the blend image used as the deformation | transformation of embodiment of this invention. The schematic diagram showing the chart image used as the deformation | transformation of embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1, 1A ... Shape distortion correction assistance system, 2 ... Computer, 3 ... Projector, 4 ... CCD camera, 5 ... Bus, 6 ... CPU, 7 ... Memory, 8 ... GPU, 9 ... Keyboard, 10 ... Hard disk, 11 ... Image Processing processor 12 ... Chart image generation unit 13 ... Chart image display unit 14 ... Sensing image analysis unit 15 ... Blend image display unit 16 ... Image deformation unit 17 ... Color display change unit 18 ... Image deformation unit DESCRIPTION OF SYMBOLS 19 ... Shape distortion evaluation part, 31 ... Projection control circuit, 32 ... Liquid crystal panel, 33 ... Light source device, 34 ... Projection lens, 41 ... Imaging processing circuit, 42 ... CCD, 43 ... Imaging lens, 50 ... Projector, 51 ... Light source Control circuit 52 ... Image processing circuit 53 ... Video input terminal 54 ... Converter 55 ... Frame buffer 56 ... Image corrector Sc ... Screen

Claims (7)

A projection image shape distortion correction support system for correcting shape distortion of a projection image projected from a projector,
Chart image generating means for generating a chart image for correcting the shape distortion of the projected image;
Chart image display means for projecting the chart image generated by the chart image generation means to the projector;
Imaging means for imaging a projected image projected from the projector;
A projection image shape distortion correction support system, comprising: a blend image display unit that causes the projector to display a blend image obtained by blending a sensing image captured by the imaging unit and the chart image. In the projection image shape distortion correction support system according to claim 1,
An image distortion correction support system for a projected image, comprising image deformation means for deforming any one of the chart image and the sensing image. In the projection image shape distortion correction support system according to claim 1 or 2,
A projection image shape distortion correction support system, comprising: a sensing image analysis unit that analyzes a sensing image captured by the imaging unit and acquires coordinates of the sensing image. In the projection image shape distortion correction support system according to any one of claims 1 to 3,
Shape distortion of a projected image, characterized by comprising shape distortion evaluation means for evaluating a state of shape distortion of a projection image projected from the projector based on the coordinates of the chart image and the coordinates of the sensing image Correction support system. In the projection image shape distortion correction support system according to any one of claims 1 to 4,
The chart image is configured such that a high-luminance region is arranged in a dotted or checkered pattern on a low-luminance background image,
The distance obtained from the position coordinates of the high brightness area in the blend image displayed by the chart image and the position coordinates of the high brightness area in the blend image displayed by the corresponding sensing image is a predetermined threshold value. A projection image shape distortion correction support system comprising color display change means for changing to a different color for display when the following occurs. A method for supporting shape distortion correction of a projected image for correcting shape distortion of a projected image projected from a projector,
Generating a chart image for correcting the shape distortion of the projected image;
A procedure for projecting the generated chart image on the projector;
A procedure for imaging an image projected from the projector using an imaging means;
A method for supporting correction of shape distortion of a projected image, comprising: executing a procedure for displaying a blended image obtained by blending a sensed image captured with the chart image. A projector that modulates a light beam emitted from a light source according to image information to form an optical image, and projects the optical image.
Chart image generating means for generating a chart image for correcting the shape distortion of the projected image projected;
Chart image display means for projecting the chart image generated by the chart image generation means;
Imaging means for imaging a projected image projected from the projector;
A projector comprising: a blend image display unit configured to display a blend image obtained by blending a sensing image captured by the image capturing unit and the chart image.