JP5977880B1 - Display control apparatus, display control method, and program - Google Patents

Abstract

A viewpoint position for facilitating the appearance of a three-dimensional structure is easily set, and a 3D image showing the appearance of the three-dimensional structure from the viewpoint position is displayed. A display control device includes a viewpoint candidate setting unit that sets a plurality of viewpoint position candidates for appearance of a three-dimensional structure. In addition, the display control apparatus 100 includes an evaluation unit 160 that evaluates the visibility of a three-dimensional structure that has been viewed from the viewpoint position candidates set by the viewpoint candidate setting unit 150. Further, the display control apparatus 100 selects a viewpoint position at which the three-dimensional structure is easily visible from the viewpoint position candidates at which the three-dimensional structure is externally displayed based on the evaluation result of the evaluation unit 160. Is provided. In addition, the display control apparatus 100 includes a display control unit 190 that creates an image of a three-dimensional structure that is viewed from the viewpoint position selected by the viewpoint selection unit 170. [Selection] Figure 2

Description

  The present invention relates to a display control device, a display control method, and a program.

  A technique for displaying an external view of a building for each construction process is known. For example, Patent Document 1 discloses a data reference system that displays a construction schedule and a construction location in association with each other.

JP 2004-30372 A

  When performing maintenance management of a building, the construction history of the building may be confirmed in time series. Also, when the maintenance status of a building is explained to a customer, the maintenance work site may be explained in time series while displaying the 3D (Three Dimensional) image. Patent Document 1 discloses a technique for displaying an animation by associating a construction schedule and a construction location used in such a case.

  However, in order to display the construction site in a 3D image in an easy-to-see manner using the technology disclosed in Patent Document 1, the user determines the viewpoint position that determines from which angle the 3D image in which the building is to be created is created by trial and error. It was necessary to set. For this reason, there is a case in which the optimal viewpoint position may not be set in relation to the set time, and there is a high possibility that the visibility is insufficient.

  The present invention is to solve the above-described problems, and easily sets a viewpoint position at which a three-dimensional structure can be more easily seen, and displays a 3D image in which the three-dimensional structure is viewed from the viewpoint position. An object of the present invention is to provide a display control device, a display control method, and a program that can be used.

In order to achieve the above object, a display control apparatus according to the first aspect of the present invention provides:
Viewpoint candidate setting means for setting a plurality of viewpoint position candidates for appearance of the three-dimensional structure;
Designating means for designating the first part and the second part of the three-dimensional structure;
Among the viewpoint position candidates, for the combination of the viewpoint position that looks at the first part and the viewpoint position that looks at the second part, the second part from the viewpoint position that looks at the first part Evaluation means for highly evaluating a combination of viewpoint positions with a small amount of movement of the viewpoint position to the viewpoint position that
Viewpoint selection means for selecting a combination of viewpoint positions with high evaluation results by the evaluation means;
Display control means for creating an image of the three-dimensional structure that is externally viewed from viewpoint positions included in a combination of viewpoint positions selected by the viewpoint selection means;
It is characterized by providing.

  In order to achieve the above object, a display control apparatus according to the second aspect of the present invention provides:
  Viewpoint candidate setting means for setting a plurality of viewpoint position candidates for appearance of the three-dimensional structure;
  Designating means for designating the first part and the second part of the three-dimensional structure;
  An evaluation unit that more highly evaluates a viewpoint position in which a variance between the image area of the first part and the image area of the second part is smaller among a plurality of viewpoint position candidates;
  Viewpoint selection means for selecting a combination of viewpoint positions with high evaluation results by the evaluation means;
  Display control means for creating an image of the three-dimensional structure that is externally viewed from viewpoint positions included in a combination of viewpoint positions selected by the viewpoint selection means;
  It is characterized by providing.

  In order to achieve the above object, a display control device according to a third aspect of the present invention provides:
  Viewpoint candidate setting means for setting a plurality of viewpoint position candidates for appearance of the building;
  Designation means for designating a first construction site and a second construction site of the building;
  Among the viewpoint position candidates, a combination of a viewpoint position that externally displays the first construction site and a viewpoint position that externally displays the second construction site, from the viewpoint position that externally displays the first construction site, An evaluation means for highly evaluating a combination of viewpoint positions with a small amount of movement of the viewpoint position to the viewpoint position at which the construction site of 2 is viewed;
  Viewpoint selection means for selecting a combination of viewpoint positions with high evaluation results by the evaluation means;
  A construction part associating means for associating the construction history information including the construction part and the construction time of the construction part with the drawing information of the building where the construction was performed;
  Display control means for creating an image associating the image of the building and the construction history information that are externally viewed from viewpoint positions included in the combination of viewpoint positions selected by the viewpoint selection means;
  It is characterized by providing.

  In order to achieve the above object, a display control apparatus according to the fourth aspect of the present invention provides:
  Viewpoint candidate setting means for setting a plurality of viewpoint position candidates for appearance of the building;
  Designation means for designating a first construction site and a second construction site of the building;
  An evaluation unit that evaluates a viewpoint position with a smaller variance between the image area of the first construction site and the image area of the second construction site among a plurality of viewpoint position candidates;
  Viewpoint selection means for selecting a combination of viewpoint positions with high evaluation results by the evaluation means;
  A construction part associating means for associating the construction history information including the construction part and the construction time of the construction part with the drawing information of the building where the construction was performed;
  Display control means for creating an image associating the image of the building and the construction history information that are externally viewed from viewpoint positions included in the combination of viewpoint positions selected by the viewpoint selection means;
  It is characterized by providing.

  The display control means may create an image in which the color of the drawing part of the building corresponding to the construction part is changed for each construction period.

  The display control means may create an image in which a construction time and a construction name are added to an image corresponding to each construction.

  The display control means is configured to specify a total display time of an image in which the building image and the construction history information that are externally viewed from the viewpoint positions included in the combination of viewpoint positions selected by the viewpoint selection means are associated with each other. The display time of each image may be controlled so as to be within the reproduction time.

  In order to achieve the above object, a display control method according to a fifth aspect of the present invention includes:
  A viewpoint candidate setting step for setting a plurality of viewpoint position candidates for appearance of the structure;
  A designating step of designating a first part and a second part of the structure;
  Among the viewpoint position candidates, for the combination of the viewpoint position that looks at the first part and the viewpoint position that looks at the second part, the second part from the viewpoint position that looks at the first part An evaluation process that highly evaluates a combination of viewpoint positions where the amount of movement of the viewpoint position is small,
  A viewpoint selection step of selecting a combination of viewpoint positions with a high evaluation result by the evaluation step;
  A display control step of creating an image of the structure that is externally viewed from a viewpoint position included in a combination of viewpoint positions selected in the viewpoint selection step;
  including.

  In order to achieve the above object, a display control method according to a sixth aspect of the present invention includes:
  A viewpoint candidate setting step for setting a plurality of viewpoint position candidates for appearance of the structure;
  A designating step of designating a first part and a second part of the structure;
  An evaluation step for evaluating a viewpoint position with a smaller variance between the image area of the first part and the image area of the second part among a plurality of viewpoint position candidates;
  A viewpoint selection step of selecting a combination of viewpoint positions with a high evaluation result by the evaluation step;
  A display control step of creating an image of the structure that is externally viewed from a viewpoint position included in a combination of viewpoint positions selected in the viewpoint selection step;
  including.

  In order to achieve the above object, a program according to the seventh aspect of the present invention provides:
  Computer
  Viewpoint candidate setting means for setting a plurality of viewpoint position candidates for appearance of the structure;
  Designating means for designating the first part and the second part of the structure;
  Among the viewpoint position candidates, for the combination of the viewpoint position that looks at the first part and the viewpoint position that looks at the second part, the second part from the viewpoint position that looks at the first part Evaluation means for highly evaluating a combination of viewpoint positions with a small amount of movement of the viewpoint position to the viewpoint position where
  Viewpoint selection means for selecting a combination of viewpoint positions with high evaluation results by the evaluation means;
  Display control means for creating an image of the structure that is externally viewed from viewpoint positions included in a combination of viewpoint positions selected by the viewpoint selection means;
  To function as.

  In order to achieve the above object, a program according to the eighth aspect of the present invention provides:
  Computer
  Viewpoint candidate setting means for setting a plurality of viewpoint position candidates for appearance of the structure;
  Designating means for designating the first part and the second part of the structure;
  An evaluation unit that evaluates a viewpoint position with a smaller variance between the image area of the first part and the image area of the second part among a plurality of viewpoint position candidates;
  Viewpoint selection means for selecting a combination of viewpoint positions with high evaluation results by the evaluation means;
  Display control means for creating an image of the structure that is externally viewed from viewpoint positions included in a combination of viewpoint positions selected by the viewpoint selection means;
  To function as.

  According to the present invention, it is possible to easily set a viewpoint position at which a three-dimensional structure can be more easily seen, and display a 3D image in which the three-dimensional structure is seen from the viewpoint position.

It is a figure which shows the physical structure of the display control apparatus which concerns on Embodiment 1 of this invention. It is a figure which shows the function structure of the display control apparatus which concerns on Embodiment 1 of this invention. It is a figure for demonstrating drawing information. It is a figure for demonstrating construction log | history information. It is a figure for demonstrating matching with drawing information and construction history information. It is a figure for demonstrating the setting method of the candidate of the viewpoint position which makes a building external appearance. It is a figure for demonstrating the evaluation method of a viewpoint position. It is a figure for demonstrating the evaluation method of a viewpoint position. It is a figure for demonstrating the animation display of a construction history. It is a flowchart for demonstrating the creation process of a construction history image. It is a flowchart for demonstrating the calculation process of viewpoint evaluation. 10 is a flowchart for explaining viewpoint evaluation calculation processing in the display control apparatus according to the second embodiment. FIG. 10 is a diagram for explaining a display example of a screen of the display control apparatus according to the third embodiment.

  Hereinafter, a display control device, a display control method, and a program according to embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals.

(Embodiment 1)
In the present embodiment, a case will be described in which the three-dimensional structure is a building and the display control apparatus 100 displays an animation of a construction history such as building maintenance. As shown in FIG. 1, the display control apparatus 100 according to the first embodiment physically includes a control unit 1, a storage unit 2, an input / output unit 3, and a bus 4.

  The control unit 1 includes a ROM (Read Only Memory), a RAM (Random Access Memory), and a CPU (Central Processing Unit). The ROM stores a display control program according to the present embodiment, an initial program for performing various initial settings, hardware inspection, program loading, and the like. The RAM functions as a work area for temporarily storing various software programs executed by the CPU and data necessary for executing these software programs. The CPU is a central processing unit that executes various software programs and executes various processes and operations.

  The storage unit 2 includes a nonvolatile memory such as a hard disk drive or a flash memory. The storage unit 2 stores various programs such as building information, construction history information, and an image processing program for displaying the building as a 3D image.

  The input / output unit 3 includes a CD (Compact Disc) drive and a USB (Universal Serial Bus) interface for acquiring building information, construction history information, and the like. The input / output unit 3 also includes a character input device such as a keyboard or a keypad that obtains weighting factors to be described later. The input / output unit 3 also supplies the image signal created by the display control unit 190 to the external display device 200.

  The bus 4 connects the control unit 1, the storage unit 2, and the input / output unit 3.

  As shown in FIG. 2, the display control apparatus 100 functionally includes a building information acquisition unit 110, a construction history information acquisition unit 120, a construction information storage unit 130, a construction part association unit 140, and viewpoint candidates. The functions of a setting unit 150, an evaluation unit 160, a viewpoint selection unit 170, a weighting factor setting unit 180, and a display control unit 190 are included. Further, the display control unit 190 includes the function of the playback time mapping unit 191.

  The building information acquisition unit 110 acquires drawing information of a building for which a construction history is displayed via the input / output unit 3. Specifically, the building information acquisition unit 110 acquires drawing information such as CAD data of a building that can display the exterior of the building as shown in FIG.

  The construction history information acquisition unit 120 acquires construction history information via the input / output unit 3. Specifically, the construction history information acquisition unit 120 acquires a construction time when a building as shown in FIG. 4 is maintained and a construction name indicating a construction site. The construction history information includes construction site integration information. The total information includes the dimension information of the construction site of the building and the cost information such as materials necessary for the construction. For example, when waterproof work is performed on a part of the roof part, the work history information includes information on the work part that specifies the range of waterproof work. When repair work is performed on a balcony part, the work history information includes information on the work part that identifies the range of the balcony part on which the repair work was performed.

  The construction information storage unit 130 stores information acquired by the building information acquisition unit 110 and the construction history information acquisition unit 120. The construction information storage unit 130 is constructed in the storage area of the storage unit 2.

  The construction part associating unit 140 associates the construction history information including the construction part with the drawing information of the building where the construction has been performed. Specifically, as shown in FIG. 5, the construction site associating unit 140 associates the construction sites of item numbers 1 to 3 shown in FIG. 4 with the drawing information shown in FIG. More specifically, the construction part associating unit 140 associates the roof waterproof construction part of item number 1 in FIG. 4 with the roof part 301 in FIG. The construction site associating unit 140 associates the balcony repair construction site of item number 2 in FIG. 4 with the balcony site 302 (302a, 302b, 302c, 302d) in FIG. The construction part associating unit 140 associates the peripheral passage repair construction part of item number 3 in FIG. 4 with the peripheral passage part 303 in FIG. 5.

  The viewpoint candidate setting unit 150 sets viewpoint position candidates for appearance of the building. Specifically, the viewpoint candidate setting unit 150 sets a plurality of spherical surfaces with different radii that include the target building, and sets viewpoint position candidates on the spherical surfaces. More specifically, the viewpoint candidate setting unit 150 includes a spherical surface having a radius r1 circumscribing the building, a spherical surface having a radius 1.5 times the radius r1, a spherical surface having a radius twice the radius r1, and three times the radius r1. Set a sphere with a radius and multiple spheres.

  In this embodiment, in order to facilitate understanding, a case will be described in which the viewpoint candidate setting unit 150 sets only a spherical surface having a radius about 1.5 times the radius r1 of the spherical surface circumscribing the building. As illustrated in FIG. 6, the viewpoint candidate setting unit 150 sets a spherical surface 311 that includes a target building. Next, the viewpoint candidate setting unit 150 has a circumference 312 obtained by cutting the spherical surface 311 at the height of the ground, a circumference 313 obtained by cutting the spherical surface 311 at the height of the center of the building, and the spherical surface 311 about 30 ° from the center of the building. A circumference 314 cut at a height forming an angle of λ and a circumference 315 obtained by cutting the spherical surface 311 at a height forming an angle of about 60 ° from the center of the building are set. Next, the viewpoint candidate setting unit 150 sets viewpoint position candidates at positions that divide each set circumference into eight equal parts. Specifically, the viewpoint candidate setting unit 150 sets eight viewpoint position candidates P41, P42, P43, P44, P45, P46, P47, and P48 on the circumference of the circumference 312. Similarly, eight viewpoint position candidates P31 to P38 are set on the circumference of the circumference 313. Similarly, eight viewpoint position candidates P21 to P28 are set on the circumference of the circumference 314. Similarly, eight viewpoint position candidates P11 to P18 are set on the circumference of the circumference 315. Therefore, the viewpoint candidate setting unit 150 sets a total of 32 viewpoint position candidates.

  Returning to FIG. 2, the evaluation unit 160 evaluates, for each viewpoint position candidate, the visibility of the building that has been viewed from the viewpoint position candidates set by the viewpoint candidate setting unit 150. Specifically, the evaluation unit 160 determines the visibility of each construction site and the visibility of the positional relationship between each construction site when a plurality of construction sites are continuously animated based on the construction history. evaluate. More specifically, the evaluation unit 160 evaluates a combination of viewpoint positions extracted from viewpoint position candidates set by the viewpoint candidate setting unit 150 based on the following criteria. The combination of viewpoint positions is a combination of viewpoint positions that externally show the construction site shown in FIG.

(1) Highly evaluate the viewpoint position at which the area ratio of the construction site of interest occupying the image area of the building displayed on the display device 200 is high.
(2) Create an image that externally displays the second construction site (second attention site) from the viewpoint position used to create an image that externally displays the first construction site (first attention site) The viewpoint position with a small movement amount of the viewpoint position to the viewpoint position used for the evaluation is highly evaluated.
(3) When the construction site of interest is composed of a plurality of sites, the viewpoint position where the difference between the image area of any site in the plurality of sites and the image area of any other site is reduced is highly evaluated. .
Note that the construction site to be noted is a construction site that is a target of each construction in the construction history shown in FIG.

  The evaluation unit 160 performs evaluation using Expression 1 in order to evaluate the easiness to see the construction site that is the target of the construction history based on the above-described criteria. Wa, Ws, and We are weighting factors. By setting the weighting factor, it is possible to determine which evaluation parameter is to be displayed as an important animation display. In the evaluation using Formula 1, the smaller the evaluation point E, the better the evaluation.

  E = Wa / Area + Ws * Smoothness + We * Equivalence (Equation 1)

  Area in Expression 1 is a parameter indicating the area ratio of the construction site projected on the image. Since the higher the area ratio of the construction site projected on the image, the easier it is to see, the Wa / Area value is set to be smaller as the area ratio is higher. For example, if the area ratio of the construction site to the image area is 30%, Area = 30, and if the area ratio of the construction site to the image area is 50%, Area = 50.

  Smoothness in Formula 1 is the viewpoint position from the viewpoint position Pi that externally shows the construction site (first target site) of the previous construction to the viewpoint position Pj that externally displays the current construction site (second site of interest). Is a parameter indicating the amount of movement (distance between the viewpoint Pi and the viewpoint Pj). The closer the viewpoint position Pi that looks at the previous construction site and the viewpoint position Pj that looks at the current construction site are, the easier it is to see the positional relationship between the images. Determine to be. For example, in FIG. 8, when the distance from P31 to P35 is 20 m, and the viewpoint position is moved from P31 to P35, Smoothness = 20.

  Equivalence of Formula 1 is a parameter indicating a difference in image area of each part when the target construction part is divided into a plurality of parts. When the construction site is divided into a plurality of sites, the smaller the difference in the image areas of the divided construction sites, the easier it is to compare the construction sites. Therefore, the value of We * Equivalence is determined to be smaller as the difference in image area between the divided parts is smaller. For example, in the case of the balcony repair work of item number 2 in FIG. 4, the balcony part 302 is divided into four parts 302a, 302b, 302c, and 302d as shown in FIG. The viewpoint position at which the difference between the image areas of the four parts becomes small is highly evaluated.

For this purpose, for example, Equivalence is evaluated using a dispersion formula. A specific example will be described. For example, assume that the image areas of the balcony portions 302a, 302b, 302c, and 302d are Sa = 10 m ² , Sb = 12 m ² , Sc = 14 m ² , and Sd = 16 m ² , respectively. In this case, the average of the four image areas is 13 m ² . At this time, the value of Equivalence is calculated using Equation 2.
Equivalence = {(13-10) ² + (13-12) ² + (13-14) ² + (13-16) ² } / 4 (Formula 2)

Next, the viewpoint position evaluation method performed by the evaluation unit 160 will be specifically described with reference to FIG. When the construction site can be viewed from one viewpoint position, the number of viewpoint position candidates set by the viewpoint candidate setting unit 150 is n, and the construction history of the animation history to be displayed is k. There are n combinations of viewpoint positions corresponding to n raised to the kth power (n ^k ). In the present embodiment, as described with reference to FIG. 6, the number of circumferences is four, and the number of viewpoint position candidates set on each circumference is eight. , 32 viewpoint position candidates are set. Further, when the work history of item number 1 to item number 3 in FIG. 4 is displayed as an animation, k = 3. Accordingly, the number of combinations of viewpoint position candidates is 32,768 (= 32 ³ ). As shown in FIG. 7, the evaluation unit 160 calculates evaluation points based on Equation 1 for the ^nk viewpoint position combinations.

  By the way, in the example shown in FIG. 8, the peripheral passage part 303 has the part which is the shadow of the building even if it appears from any viewpoint position candidate, so all the peripheral road parts 303 are externally shown from one viewpoint position. I can't do that. In such a case, the evaluation unit 160 divides the construction site, and evaluates by adding a viewpoint position at which the remaining construction site that could not be seen from the initially selected viewpoint position can be seen. For example, when the evaluation unit 160 first selects P35 shown in FIG. 8 as the viewpoint position for appearance of the surrounding passage part 303, the remaining part of the surrounding road part 303 that cannot be seen behind the building from the viewpoint position of P35. The portion can be seen, for example, P32 is added and evaluated. When a plurality of viewpoint positions are adopted as viewpoint positions for appearance of one construction site in this way, the evaluation unit 160 processes the average value of the evaluation points at the plurality of viewpoint positions as an evaluation point.

  Returning to FIG. 2, the viewpoint selection unit 170 selects a viewpoint position at which each of the construction sites can easily be seen from the viewpoint position candidates for appearance of the building, based on the evaluation result of the evaluation unit 160. Specifically, the viewpoint selection unit 170 constructs a combination of viewpoint positions having the best evaluation point among the evaluation points calculated by the evaluation unit 160 from among the combinations of viewpoint positions in which the building shown in FIG. Select as a combination of viewpoint positions to animate the history.

  The weighting coefficient setting unit 180 supplies the weighting coefficient used for Expression 1 to the evaluation unit 160. The weight coefficient is stored in the storage unit 2 in advance. Further, the user may change and set from the input / output unit 3.

  Using the image processing program, the display control unit 190 creates a 3D image of the building that is externally viewed from the viewpoint position selected by the viewpoint selection unit 170, and creates the 3D image created on the display device 200 connected to the display control device 100. Animate. In addition, the display control unit 190 changes the color for each construction site when creating a 3D image of a building. In addition to the 3D image of the building, the display control unit 190 displays the construction time and the construction name on the display device 200.

  The reproduction time mapping unit 191 adjusts the display time of the 3D image created by the display control unit 190 in accordance with the reproduction time designated by the user who reproduces the construction history animation. For example, the playback time mapping unit 191 creates four 3D images that are displayed from the four viewpoint positions P35, P32, P22, and P12 shown in FIG. 8 by the display control unit 190, and sets the animation playback time from the user to 40 seconds. Is set, the reproduction time of each 3D image is allocated, for example, every 10 seconds. Then, as shown in FIG. 9, the display control unit 190 displays an animation so that a 3D image in which the viewpoint position is changed for each construction site is displayed for 10 seconds. At that time, the display control unit 190 changes the color of each construction site to make it easier to identify the construction site of interest.

  Next, construction history image creation processing executed by the display control apparatus 100 having the above configuration will be described with reference to the flowcharts shown in FIGS. 10 and 11. In the present embodiment, a case will be described in which three construction histories from item number 1 to item number 3 shown in FIG. It is assumed that the drawing information including the CAD data of the building and the construction history information are stored in the construction information storage unit 130 in advance. When the user starts a display control program installed in advance in the display control apparatus 100, the flowchart shown in FIG.

  When the display control program is activated, the control unit 1 first acquires CAD data of a building stored in the construction information storage unit 130, and displays the 3D model of the building on the display device 200 (step S11). Next, the control unit 1 acquires construction history information stored in the construction information storage unit 130 (step S12). Next, as described with reference to FIG. 5, the construction part association unit 140 associates the acquired construction history information with the drawing information (step S13).

  When the association between the construction history information and the building information is finished, the evaluation unit 160 selects a viewpoint position combination that allows the construction site to easily appear from the viewpoint position candidates set by the viewpoint candidate setting unit 150. Evaluate the visibility of the construction site from each of the viewpoint positions included in the combination of viewpoint positions. For this purpose, the evaluation unit 160 performs viewpoint evaluation calculation processing using Equation 1 (step S14).

The viewpoint evaluation calculation process will be described with reference to FIG. The evaluation unit 160 arbitrarily selects three viewpoint positions for visualizing the three construction sites from the viewpoint position candidates set by the viewpoint candidate setting unit 150 (step S21). Specifically, the evaluation unit 160 extracts one combination from among all combinations of the viewpoint position shown in FIG. 7 (32 ^triplicate).

  When an arbitrary combination of viewpoint positions is extracted, the evaluation unit 160 identifies a construction site that can be seen from each viewpoint position (step S22). When identifying the construction site, the evaluation unit 160 determines whether or not all the construction sites can be seen from a single viewpoint position (step S23). For example, in the example shown in FIG. 8, with respect to the rooftop portion 301, all rooftop portions 301 can be seen from one viewpoint position such as P11. However, since the peripheral passage portion 303 is a shadow of the building, it is impossible to externally see the entire peripheral passage portion 303 from one viewpoint position. In this case (step S23: No), the evaluation unit 160 adds viewpoint positions at which the construction site can be divided and the remaining construction sites can be seen (step S24). For example, when the evaluation unit 160 first selects P35 as the viewpoint position for appearance of the peripheral passage portion 303, for example, by adding P32 which is the viewpoint position for appearance of the peripheral passage portion 303 from the opposite side of the building, P35 The remaining construction parts of the peripheral passage part 303 that could not be seen from the outside can be seen from the outside.

  When the evaluation unit 160 extracts a combination of viewpoint positions, the evaluation unit 160 calculates an evaluation score for the combination of viewpoint positions using Equation 1 (step S25). When the viewpoint position is added in step S24, the evaluation unit 160 sets the average value of the evaluation points calculated for the added viewpoint position as the evaluation point of the combination of the viewpoint positions.

  Next, the evaluation unit 160 determines whether or not evaluation point calculation has been completed for all combinations of viewpoint positions shown in FIG. 7 (step S26). If the evaluation calculation has not been completed for all combinations (step S26: No), the evaluation unit 160 changes the combination of viewpoint positions (step S27) and calculates evaluation points.

  When the evaluation calculation has been completed for all the combinations (step S26: Yes), the viewpoint selection unit 170 selects the combination of viewpoint positions with the best evaluation score as the combination of viewpoint positions of the image displaying the construction history (step S28). ) The process of the display control apparatus 100 transitions to step S15 in FIG.

  Returning to FIG. 10, the display control unit 190 uses the image processing program to create a 3D image in which the construction site is seen from each of the viewpoint positions included in the combination of viewpoint positions selected by the viewpoint selection unit 170 (step S15). ). For example, when the viewpoint selection unit 170 selects a combination of four viewpoint positions P35, P32, P22, and P12, the display control unit 190 displays the four construction sites that appear from P35, P32, P22, and P12. Create a 3D image.

  When the display control unit 190 completes the creation of the 3D image for displaying the construction history, the playback time mapping unit 191 displays the 3D image corresponding to each construction so that the animation display of the construction history falls within the playback time set by the user. Mapping processing for allocating the display time is performed (step S16). Then, the display control unit 190 displays four 3D images that externally show the respective construction sites that are time-distributed so as to be within the reproduction time, on the display device 200 as shown in FIG. 9 (step S17). This is the end of the description of the construction history image creation process.

  As described above, the display control apparatus 100 according to the first embodiment sets a plurality of viewpoint position candidates on a plurality of spherical surfaces having different radii including the target building, and the viewpoint position is calculated based on Equation 1. The visibility of the construction site from each candidate is evaluated for each viewpoint position combination. Then, the display control apparatus 100 selects a combination of viewpoint positions in which each construction site is easily visible, and displays a 3D image in which the construction site is viewed from the selected viewpoint position in time series animation. Thereby, the display control apparatus 100 can display the construction history in time series so that each construction site can be easily seen and the positional relationship between the construction sites can be easily understood. That is, since the display control apparatus 100 selects a viewpoint position at which the construction site is easily visible, it is not necessary for the user to set a viewpoint position for displaying the construction site in 3D through trial and error. Therefore, by using the display control apparatus 100, it is possible to easily create an effective presentation image that makes it easy to intuitively grasp the construction history.

  In the description of the first embodiment, the viewpoint candidate setting unit 150 sets four circumferences for cutting the set spherical surface, and sets eight viewpoint position candidates on each of the circumferences. However, the viewpoint candidate setting unit 150 may set more circles. Further, the circumference may be set so as to cut an arbitrary position on the spherical surface. Further, eight or more viewpoint position candidates may be set on each circumference. Further, the number of eight viewpoint position candidates may be reduced. Also, the visibility and processing time of the animated image are graded, and based on the visibility grade and processing time grade specified by the user, the display control apparatus 100 sets the number of spherical surfaces to be set and the circle to be set. The number of circumferences and the number of viewpoint position candidates set for each circumference may be determined.

  In the above description, the viewpoint position candidates are set on the spherical surface. However, the viewpoint position setting position need not be limited to the spherical surface. For example, you may make it set on surfaces, such as an ellipsoid, a cube, and a rectangular parallelepiped.

  In the above description, the evaluation unit 160 selects the viewpoint position from the viewpoint position candidates preset by the viewpoint candidate setting unit 150. As another method, the selected viewpoint position can be finely adjusted. Specifically, the viewpoint candidate selection unit 150 additionally sets a second viewpoint position candidate around the viewpoint position selected by the evaluation unit 160, and the evaluation unit 160 sets Equation 1 for the second viewpoint position candidate. Use to evaluate. Then, the viewpoint selection unit 170 selects the combination of viewpoint positions with the highest evaluation including the second viewpoint position candidates. As a result, the viewpoint position can be finely adjusted, and a viewpoint position combination that is easier to see can be selected. In addition, it is possible to reduce the amount of calculation processing compared to setting a large number of viewpoint position candidates from the beginning.

  Further, in the description of the first embodiment, the explanation has been made of evaluating the Equivalence of Equation 1 using the dispersion equation. However, Equivalence evaluation need not be limited to this. For example, the evaluation may be performed based on the ratio of the largest image area to the smallest image area among the image areas of each part. In this case, the closer this ratio is to 1, the better the evaluation.

  Further, in the description of the first embodiment, the visibility of the construction site is evaluated using Formula 1, but may be evaluated using another evaluation formula. For example, any value of the weighting factors Wa, Ws, and We in Expression 1 may be set to “0”. Other evaluation parameters may be added.

  In the above description, the combination of the viewpoint positions with the best evaluation points is selected, and the 3D image that appears from the viewpoint positions is displayed as an animation. However, the present invention is not limited to this, and a plurality of 3D images appearing from a plurality of different viewpoint positions for one construction site may be displayed. For example, for each construction site, a plurality of 3D images appearing from a plurality of viewpoint positions with good evaluation points may be displayed.

  In the above description, the case where a plurality of sites of interest are continuously displayed in animation has been described. However, the display control apparatus 100 can also be applied to the case of displaying an image of one site of interest. In this case, the weighting coefficient Ws of Expression 1 is set to “0”.

  In the above description, the case where the weighting factor is fixed has been described. However, the construction history image can be created by changing the weighting factor. For example, a table in which a plurality of values of the weighting factors Wa, Ws, and We are set is stored in the storage unit 2 in advance, and the evaluation unit 160 uses Equation 1 for each combination of the values of the weighting factors Wa, Ws, and We. Find evaluation points. Then, the viewpoint selection unit 170 may select the viewpoint position combination with the best evaluation point from the viewpoint position combinations calculated by changing the combination of the weighting factors.

  As another display control method, a table in which a plurality of values of the weighting factors Wa, Ws, and We are set is stored in the storage unit 2 in advance, and the evaluation unit 160 performs each combination of the values of the weighting factors Wa, Ws, and We. The evaluation score is obtained using Equation 1. Then, the viewpoint selection unit 170 selects a combination of viewpoint positions that provides the best evaluation score for each combination of weighting factors. Then, the display control unit 190 sequentially displays the construction history images created for each combination of weighting factors on the display device 200. Thereby, the display control apparatus 100 can display a construction history image based on various evaluation viewpoints.

  In addition, when the viewpoint position at which a certain construction site appears and the viewpoint position at which the next construction site appears are separated, there may be an animation display that makes it difficult to grasp the positional relationship between the two construction sites. In such a case, the display control unit 190 may add another viewpoint position in the middle of the two viewpoint positions, add a 3D image that appears from the added viewpoint position, and display an animation. For example, when P35 and P32 shown in FIG. 8 are selected as the viewpoint positions for appearance of the peripheral passage portion 303, the display control unit 190 adds the viewpoint positions of P34 and P33 located between P35 and P32, and added them. An animation display may be performed by adding a 3D image that appears from the viewpoint position.

(Embodiment 2)
In the description of the first embodiment, as described with reference to FIG. 7, the evaluation unit 160 performs the evaluation calculation using Expression 1 for all combinations of viewpoint position candidates. However, if the number of viewpoint position candidates is increased, the number of viewpoint position candidates to be evaluated increases exponentially, and the processing load increases. In the second embodiment, a technique for reducing the calculation process will be described with reference to a flowchart shown in FIG.

  The configuration of the display control apparatus 100 according to the second embodiment is the same as the configuration described in the first embodiment. The construction history image creation process described with reference to the flowchart shown in FIG. 10 in the first embodiment is the same. However, a part of the flowchart of the viewpoint evaluation calculation process described with reference to FIG. 11 is changed. The viewpoint evaluation calculation process according to the second embodiment will be described with reference to the flowchart shown in FIG.

  In the viewpoint evaluation calculation process according to the second embodiment, after step S22, a step of deleting a candidate for a viewpoint position where the construction site cannot be visually recognized is provided (step S30). Specifically, the viewpoint candidate setting unit 150 deletes a viewpoint position lower than the height of the roof from the viewpoint position candidates that make the roof portion 301 appear. This is because the rooftop portion 301 cannot be seen from a viewpoint position lower than the height of the rooftop. Similarly, the viewpoint candidate setting unit 150 deletes a viewpoint position where the balcony part 302 cannot be seen from the candidates, and deletes a viewpoint position where the peripheral passage part 303 cannot be seen from the candidates.

More specifically, in the rooftop waterproofing work of item No. 1 in FIG. 4, if there are eight viewpoint positions from P11 to P18 that can appear on the rooftop part 301, the viewpoint position of item No.1 Can be reduced from 32 to 8, and the amount of calculation processing can be reduced to 25%. Similarly, in the balcony restoration work of item number 2 in FIG. 4, the viewpoint position candidates that can appear on the balcony part 302 are 9 of P22, P23, P24, P32, P33, P34, P42, P43, and P44. If there are only two, the number of viewpoint position candidates of item number 2 can be narrowed from 32 to 9, and the amount of calculation processing can be reduced to 30% or less. Similarly, in the peripheral passage repair work of item number 3 in FIG. 4, the peripheral passage part 303 cannot be seen from the eight viewpoint positions from P11 to P18. The number can be reduced from 32 to 24, and the amount of calculation processing can be reduced to 75% or less. In total, 8 × 9 × 24 = 1,728, and the amount of calculation can be reduced to 6% (8 × 9 × 24/32 ³ ) or less.

In the description of the second embodiment, the method for reducing the processing load by excluding the viewpoint position where the construction site cannot be visually recognized from the viewpoint position candidates has been described. However, the method for reducing the number of viewpoint position candidates is described here. There is no need to limit. For example,
(1) You may make it exclude from a candidate the viewpoint position whose area ratio of the construction site | part to which it occupies for the image area of the building displayed on the display apparatus 200 is below a predetermined threshold value.
(2) The amount of movement of the viewpoint position from the viewpoint position used to create an image that looks at the first construction site to the viewpoint position used to create an image that looks at the second construction site is You may make it exclude the viewpoint position which is more than a predetermined threshold value from a candidate.
(3) When the construction site of interest is composed of a plurality of parts, a viewpoint in which the difference between the image area of any part of the plurality of parts and the image area of any other part is equal to or greater than a predetermined threshold You may make it exclude a position from a candidate.

  In the above description, after the evaluation unit 160 evaluates all the viewpoint position candidate combinations based on Expression 1, the viewpoint selection unit 170 selects the best viewpoint position combination. . As another method, when a combination of viewpoint positions in which the evaluation score calculated using Expression 1 is less than or equal to an arbitrarily determined threshold value (good evaluation) is detected, the subsequent evaluation is stopped and the viewpoint selection unit 170 is stopped. May select the combination of the viewpoint positions. That is, when a combination of viewpoint position candidates whose evaluation score is equal to or less than a threshold value is detected, evaluation of other viewpoint position combinations may be omitted to reduce the processing load.

(Embodiment 3)
In the description given with reference to FIG. 9 in the first embodiment, the method for displaying the animation of a plurality of construction sites has been described. In the third embodiment, a display example of a screen for animation display will be described with reference to FIG.

  As shown in FIG. 13, the display control unit 190 displays the three construction histories from No. 1 to No. 3 in the construction history shown in FIG. At this time, for example, the display control unit 190 performs display control so that a new image at the construction time is superimposed on an old image at the construction time. The display control unit 190 displays a 3D image of the building with the construction site colored in the center of the image corresponding to each construction history. Further, the display control unit 190 displays the construction history on the right side of the construction history display image, and displays the construction history column corresponding to the displayed construction site with a frame. In addition, the display control unit 190 displays the construction time below the construction history display image, and displays the construction time corresponding to the displayed construction site with an arrow.

  In addition, the display control apparatus 100 can also display each construction site independently without displaying a plurality of construction sites in animation. For example, when the user designates an arbitrary item in the display history on the right side of the screen, the display control unit 190 may display a 3D image that shows the corresponding construction site on the display device 200. In addition, when the user designates an arbitrary construction period at the bottom of the screen, the display control unit 190 may display a 3D image on the display device 200 that shows the construction part of the construction performed at the construction period. Good.

  In the description of the first to third embodiments, the case where the display control apparatus 100 displays a plurality of construction histories in animation is described. However, the scope of the present invention is not limited to this. For example, instead of a plurality of construction histories, the present invention can also be applied to a case where a plurality of parts of a building (entrance, side surfaces of east, west, south, north, roof, veranda, garden, etc.) are displayed in order.

  In the above description, a building is described as an example of a three-dimensional structure. However, the application of the present invention does not need to limit the three-dimensional structure to a building. For example, the three-dimensional structure may be a vehicle such as a car or a train, or may be a decorative item such as clothes.

  In addition to being able to provide the display control apparatus 100 having a configuration for realizing the functions according to the present invention in advance, the display control apparatus according to the present invention can be applied to an existing personal computer or information terminal device by applying a program. It can also function as 100. That is, by applying the program for realizing each functional configuration by the display control apparatus 100 exemplified in the above embodiment so that a CPU or the like for controlling an existing personal computer or information terminal device can be executed, the present invention is applied. It is possible to function as the display control apparatus 100 according to the above. The display control method according to the present invention can be implemented using the display control device 100.

  Moreover, the application method of such a program is arbitrary. For example, the program can be stored and applied to a computer-readable recording medium (CD-ROM (Compact Disc Read-Only Memory), DVD (Digital Versatile Disc), MO (Magneto Optical disc), etc.), the Internet, etc. It is also possible to apply the program by storing it in a storage on the network and downloading it.

DESCRIPTION OF SYMBOLS 1 ... Control part, 2 ... Memory | storage part, 3 ... Input / output part, 4 ... Bus, 100 ... Display control apparatus, 110 ... Building information acquisition part, 120 ... Construction history information acquisition part, 130 ... Construction information storage part, 140 ... Construction site associating unit 150 ... viewpoint candidate setting unit 160 ... evaluation unit 170 ... viewpoint selection unit 180 ... weight coefficient setting unit 190 ... display control unit 191 ... reproduction time mapping unit 200 ... display device 301 ... roof top part, 302, 302a, 302b, 302c, 302d ... balcony part, 303 ... peripheral passage part, 311 ... spherical surface, 312, 313, 314, 315 ... circumference

Claims (11)

Viewpoint candidate setting means for setting a plurality of viewpoint position candidates for appearance of the three-dimensional structure;
Designating means for designating the first part and the second part of the three-dimensional structure;
Among the viewpoint position candidates, for the combination of the viewpoint position that looks at the first part and the viewpoint position that looks at the second part, the second part from the viewpoint position that looks at the first part Evaluation means for highly evaluating a combination of viewpoint positions with a small amount of movement of the viewpoint position to the viewpoint position that
Viewpoint selection means for selecting a combination of viewpoint positions with high evaluation results by the evaluation means;
Display control means for creating an image of the three-dimensional structure that is externally viewed from viewpoint positions included in a combination of viewpoint positions selected by the viewpoint selection means;
A display control device.   Viewpoint candidate setting means for setting a plurality of viewpoint position candidates for appearance of the three-dimensional structure;
  Designating means for designating the first part and the second part of the three-dimensional structure;
  An evaluation unit that more highly evaluates a viewpoint position in which a variance between the image area of the first part and the image area of the second part is smaller among a plurality of viewpoint position candidates;
  Viewpoint selection means for selecting a combination of viewpoint positions with high evaluation results by the evaluation means;
  Display control means for creating an image of the three-dimensional structure that is externally viewed from viewpoint positions included in a combination of viewpoint positions selected by the viewpoint selection means;
  A display control device.   Viewpoint candidate setting means for setting a plurality of viewpoint position candidates for appearance of the building;
  Designation means for designating a first construction site and a second construction site of the building;
  Among the viewpoint position candidates, a combination of a viewpoint position that externally displays the first construction site and a viewpoint position that externally displays the second construction site, from the viewpoint position that externally displays the first construction site, An evaluation means for highly evaluating a combination of viewpoint positions with a small amount of movement of the viewpoint position to the viewpoint position at which the construction site of 2 is viewed;
  Viewpoint selection means for selecting a combination of viewpoint positions with high evaluation results by the evaluation means;
  A construction part associating means for associating the construction history information including the construction part and the construction time of the construction part with the drawing information of the building where the construction was performed;
  Display control means for creating an image associating the image of the building and the construction history information that are externally viewed from viewpoint positions included in the combination of viewpoint positions selected by the viewpoint selection means;
  A display control device.   Viewpoint candidate setting means for setting a plurality of viewpoint position candidates for appearance of the building;
  Designation means for designating a first construction site and a second construction site of the building;
  An evaluation unit that evaluates a viewpoint position with a smaller variance between the image area of the first construction site and the image area of the second construction site among a plurality of viewpoint position candidates;
  Viewpoint selection means for selecting a combination of viewpoint positions with high evaluation results by the evaluation means;
  A construction part associating means for associating the construction history information including the construction part and the construction time of the construction part with the drawing information of the building where the construction was performed;
  Display control means for creating an image associating the image of the building and the construction history information that are externally viewed from viewpoint positions included in the combination of viewpoint positions selected by the viewpoint selection means;
  A display control device. Wherein the display control unit, the color of the drawing portion of the building corresponding to the construction site, to create the image varied from the construction period,
The display control apparatus according to claim 3 or 4 . The display control means creates an image with a construction time and a construction name added to an image corresponding to each construction.
The display control apparatus according to any one of claims 3 to 5 . The display control means is configured to specify a total display time of an image in which the building image and the construction history information that are externally viewed from the viewpoint positions included in the combination of viewpoint positions selected by the viewpoint selection means are associated with each other. Control the display time of each image to fit within the playback time ,
The display control apparatus according to any one of claims 3 to 6 . A viewpoint candidate setting step for setting a plurality of viewpoint position candidates for appearance of the structure;
A designating step of designating a first part and a second part of the structure;
Among the viewpoint position candidates, for the combination of the viewpoint position that looks at the first part and the viewpoint position that looks at the second part, the second part from the viewpoint position that looks at the first part An evaluation process that highly evaluates a combination of viewpoint positions where the amount of movement of the viewpoint position is small ,
A viewpoint selection step of selecting a combination of viewpoint positions with a high evaluation result by the evaluation step;
A display control step of creating an image of the structure was the appearance from the viewpoint position included in the selected combination of viewpoint positions in the viewpoint selecting step,
A display control method including:   A viewpoint candidate setting step for setting a plurality of viewpoint position candidates for appearance of the structure;
  A designating step of designating a first part and a second part of the structure;
  An evaluation step for evaluating a viewpoint position with a smaller variance between the image area of the first part and the image area of the second part among a plurality of viewpoint position candidates;
  A viewpoint selection step of selecting a combination of viewpoint positions with a high evaluation result by the evaluation step;
  A display control step of creating an image of the structure that is externally viewed from a viewpoint position included in a combination of viewpoint positions selected in the viewpoint selection step;
  A display control method including: Computer
Viewpoint candidate setting means for setting a plurality of viewpoint position candidates for appearance of the structure;
Designating means for designating the first part and the second part of the structure;
Among the viewpoint position candidates, for the combination of the viewpoint position that looks at the first part and the viewpoint position that looks at the second part, the second part from the viewpoint position that looks at the first part Evaluation means for highly evaluating a combination of viewpoint positions with a small amount of movement of the viewpoint position to the viewpoint position where
Viewpoint selection means for selecting a combination of viewpoint positions with high evaluation results by the evaluation means;
Display control means for creating an image of the structure that is externally viewed from viewpoint positions included in a combination of viewpoint positions selected by the viewpoint selection means;
Program to function as.   Computer
  Viewpoint candidate setting means for setting a plurality of viewpoint position candidates for appearance of the structure;
  Designating means for designating the first part and the second part of the structure;
  An evaluation unit that evaluates a viewpoint position with a smaller variance between the image area of the first part and the image area of the second part among a plurality of viewpoint position candidates;
  Viewpoint selection means for selecting a combination of viewpoint positions with high evaluation results by the evaluation means;
  Display control means for creating an image of the structure that is externally viewed from viewpoint positions included in a combination of viewpoint positions selected by the viewpoint selection means;
  Program to function as.

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