Image generation device, image generation method, and computer program

Abstract

To provide a technique enabling setting of a ground line and generation of an accurate image in generating an image of constructing a building on a land.SOLUTION: An image generation device 1 comprises a building information storage part 1A for storing a building image relating to a three-dimensional image of a prescribed building, a land information storage part 1B for storing a land image relating to the three-dimensional image of the prescribed land, reception means for receiving designation of a prescribed point as a GL reference point, the reference of a ground line in the prescribed land, and a synthesis processing part 13 for synthesizing the building image on the land image to generate a synthesized image. The synthesis processing part 13 synthesizes the building image on the land image, with coordinates in the vertical direction of the designated prescribed point used as the ground line.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a technique for synthesizing a building image with a land image. [Background technology]

[0002] When purchasing land with the intention of building, or when constructing a building on owned land, the building is designed and ordered based on the image of the building it will have, but it is difficult for unfamiliar individual consumers to accurately recognize the actual image. It is also difficult for contractors to present the actual image to consumers and help them understand the specific image. For this reason, there has been a demand for a system that allows users to accurately recognize the specific image of what a specific building would look like on a specific piece of land.

[0003] In this regard, for example, Patent Document 1 proposes a real estate information output device that is connected to a potential purchaser terminal used by a potential purchaser of real estate and displays information about potential real estate on the potential purchaser terminal in response to a request from the potential purchaser terminal, the real estate information output device comprising: an input unit that inputs real estate search information output from the potential purchaser terminal; an extraction unit that extracts land information for potential land that can be purchased from the land information for multiple potential land plots using learning results obtained by learning information about real estate based on the real estate search information input by the input unit, and extracts building information for buildings that can be built on the land identified by the extracted land information from the building information for the multiple potential buildings; and an output control unit that displays, on the potential purchaser terminal, an image that appears to show the building identified by the building information extracted by the extraction unit standing on the land identified by the land information extracted by the extraction unit, as information about the potential real estate. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Publication No. 2019-145100 Summary of the Invention [Problem to be solved by the invention]

[0005] However, because actual land is uneven, building a building on it requires the construction of retaining walls, land development work, or land excavation work, and the content and finish of such work will vary depending on how the ground line (ground surface, also known as "GL") is established. As a result, simply superimposing an image of a building onto an image of the land can sometimes result in an inaccurate image of the actual building.

[0006] Therefore, one of the objects of the present invention is to provide a technology that enables the setting of a ground line when generating an image of a building built on land, thereby enabling the generation of an accurate image. [Means for solving the problem]

[0007] In order to achieve the above-mentioned object, an image generation device according to one aspect of the present invention comprises a building information storage means for storing a building image relating to a three-dimensional image of a specified building, a land information storage means for storing a land image relating to a three-dimensional image of a specified piece of land, a reception means for receiving a designation of a specified point as a GL reference point that serves as a reference for a ground line on the specified piece of land, and a synthesis processing means for synthesizing the building image with the land image to generate a synthesized image, wherein the synthesis processing means synthesizes the building image with the land image using the vertical coordinate of the designated specified point as a ground line.

[0008] The image processing device may further comprise an output means for outputting, as an edited image, the composite image in which gaps and / or overlapping portions occurring between the land image and the building image have been edited.

[0009] The image processing device may further comprise an editing means for editing gaps and / or overlaps occurring between the land image and the building image in the composite image.

[0010] The system may further comprise a determination means for determining whether or not construction restrictions can be met when the building is constructed on the land with the vertical coordinate of the specified point as the ground line.

[0011] The determination means may determine whether or not the building will clear height restrictions specific to the land if it is constructed on the land using the vertical coordinate of the specified point as a ground line, and the building information storage means may store information related to the height of the building, and the land information storage means may store information related to height restrictions specific to the land.

[0012] The determination means determines whether or not the shadow restrictions on the surrounding area can be cleared if the building is constructed on the land using the vertical coordinate of the specified point as the ground line, and the land information storage means may store information regarding the shadow restrictions on the surrounding area for the land.

[0013] The land image may include an image of the land's surroundings.

[0014] The synthesis processing means may synthesize the building image onto the land image using a value obtained by adding or subtracting a predetermined value to the vertical coordinate of the designated point as a reference.

[0015] The information processing device may further comprise a recommendation means for displaying a point to be recommended as the predetermined point in the land image.

[0016] An image generation method according to another aspect of the present invention is carried out by a computer having a building information storage means for storing a building image relating to a three-dimensional image of a specified building, and a land information storage means for storing a land image relating to a three-dimensional image of a specified piece of land, and includes: a reception process for receiving the designation of a specified point as a GL reference point that serves as a reference for a ground line on the specified piece of land; and a synthesis process for synthesizing the building image with the land image to generate a composite image, wherein the synthesis process synthesizes the building image with the land image using the vertical coordinate of the specified specified point as a ground line.

[0017] A computer program according to another aspect of the present invention causes a computer having a building information storage means for storing a building image relating to a three-dimensional image of a specified building and a land information storage means for storing a land image relating to a three-dimensional image of a specified piece of land to execute a reception process for receiving the designation of a specified point as a GL reference point that serves as a reference for a ground line on the specified piece of land, and a synthesis process for synthesizing the building image with the land image to generate a composite image, wherein the synthesis process synthesizes the building image with the land image using the vertical coordinate of the specified specified point as a ground line.

[0018] The computer program can be provided by downloading it via a network such as the Internet, or by recording it on various computer-readable recording media such as a CD-ROM. [Effects of the Invention]

[0019] According to the present invention, it is possible to set a ground line when generating an image of a building constructed on land, and as a result, it is possible to generate an accurate image. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 2 is a functional block diagram showing functions of the image generating device according to the embodiment of the present invention. [Figure 2]10 is a diagram showing an example of data stored in a building information storage unit in the image generating device according to the present embodiment. FIG. [Figure 3] 10 is a diagram showing an example of data stored in a land information storage unit in the image generating device according to the present embodiment. FIG. [Figure 4] 5 is a diagram showing an example of data stored in a restriction information storage unit in the image generating device according to the present embodiment. FIG. [Figure 5] FIG. 2 is a process flow diagram showing the flow of processing by the image generating device according to the present embodiment. [Figure 6] FIG. 10 is a diagram showing an example of an output screen by the image generating device according to the present embodiment. [Figure 7] FIG. 10 is a diagram showing an example of an output screen by the image generating device according to the present embodiment. [Figure 8] FIG. 10 is a diagram showing an example of an output screen by the image generating device according to the present embodiment. [Figure 9] FIG. 10 is a diagram showing an example of an output screen by the image generating device according to the present embodiment. [Figure 10] FIG. 10 is a diagram showing an example of an output screen by the image generating device according to the present embodiment. [Figure 11] FIG. 10 is a diagram showing an example of an output screen by the image generating device according to the present embodiment. [Figure 12] FIG. 10 is a diagram showing an example of an output screen by the image generating device according to the present embodiment. [Figure 13] FIG. 10 is a diagram showing an example of an output screen by the image generating device according to the present embodiment. [Figure 14] FIG. 10 is a diagram showing an example of an output screen by the image generating device according to the present embodiment. [Figure 15] FIG. 10 is a diagram showing an example of an output screen by the image generating device according to the present embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0021] Overview The image generating device 1 according to the embodiment of the present invention shown in Fig. 1 is a device that allows a user to specifically grasp an image of a specific building built on a specific piece of land by synthesizing three-dimensional images of the specific land and the specific building. This image generating device 1 allows a user to specifically understand what kind of building can be built on the specific piece of land and in what form, or whether a desired building can be built on the specific piece of land as desired.

[0022] In particular, in this embodiment, a ground line can be set when generating an image of a building constructed on land. The ground line is also called the "ground level (planned ground elevation)" or "GL." The vertical position of a building is determined based on the setting of this ground line, and the height of the building relative to the surrounding ground when constructed on the land changes depending on the setting of this ground line. The user can specify any point on the land as a GL reference point that serves as the reference for the ground line, and the image generation device 1 generates an image of what the building will look like when built using the point specified by the user as the GL reference point.

[0023] ●Function configuration As shown in FIG. 1, an image generating device 1 according to an embodiment of the present invention is realized by a so-called computer or the like, and is configured as functional blocks consisting of a building information storage unit 1A, a land information storage unit 1B, a restriction information storage unit 1C, a map information storage unit 1D, an optional parts storage unit 1E, an extraction processing unit 11, a judgment processing unit 12, a synthesis processing unit 13, an editing processing unit 14, and an input / output unit 15, using hardware resources such as a CPU (Central Processing Unit), RAM (Random Access Memory), ROM (Read Only Memory), and a hard disk drive, and software resources such as a computer program executed by the CPU.

[0024] The building information storage unit 1A is a storage unit that stores building information related to buildings. The buildings whose information is stored in the building information storage unit 1A are buildings that can be constructed by a builder, regardless of whether they are buildings that have actually been constructed.

[0025] For example, as shown in Fig. 2, the building information storage unit 1A stores basic information, floor plans, and building images for each building ID that identifies a building. However, all of this information is merely an example, and other information that can be used to evaluate or understand a building, such as the assessed price or type of the building, can be included as appropriate.

[0026] The basic information consists of information about the building specifications, such as total floor area, building area, and height, and appropriately includes information that is necessary or useful for understanding the building and determining building height restrictions, shadow restrictions, etc. in processing by the judgment processing unit 12 described below.

[0027] The floor plan is stored as a floor plan consisting of a two-dimensional image in a predetermined data format, for example, and by referencing it, the layout and size of each room can be understood. The building image is a three-dimensional image of a building, and by combining it with a three-dimensional image of the land (land image), it is possible to intuitively grasp what the building would look like on the land in a three-dimensional manner. By combining this building image with a land image of a specific piece of land and a three-dimensional image of the surrounding environment included in the land image, a three-dimensional image of the specific piece of land and the building constructed there is generated. In addition, the three-dimensional building image may include not only the exterior of the building but also the interior of the building, and by referring to the three-dimensional image of the interior, it is possible to grasp the interior layout of the building in three dimensions.

[0028] The land information storage unit 1B is a storage unit that stores land information related to the land on which a building is to be constructed. This land information is registered and updated by the property owner, a real estate agent, etc.

[0029] For example, as shown in Fig. 3, the land information storage unit 1B stores basic information, coordinates, and land images for each land ID that identifies the land. However, all of this information is merely an example, and other information that can be used to understand the land, such as the land's access to roads, its assessed price, the population and age group of the surrounding residents, and nearby commercial facilities, can be included as appropriate.

[0030] The basic information consists of information such as the location and size of the land, including the address and site area, and appropriately includes information that is necessary or useful for understanding the land and determining building height restrictions, shadow restrictions, etc. in processing by the determination processing unit 12 described below. The land information is made up of information about the land, such as building coverage ratio, floor area ratio, lot area, and land shape.

[0031] Coordinates are information that indicates the coordinates of each specific location on land. These coordinates are configured as three-dimensional coordinates, and by referencing this coordinate information, it is possible to determine the height (altitude) of a specific location on land, as well as the boundary lines or shape of the land. The land image is a three-dimensional image of the land, and by combining it with a three-dimensional image of the building, it is possible to intuitively grasp in a three-dimensional manner what the building would look like on the land.

[0032] The land information also includes a two-dimensional land image corresponding to the three-dimensional land image, which is configured as an image that allows the shape and size of a specific piece of land to be grasped in two dimensions on a map, for example. In addition to the 3D image of the specified land identified by the land ID, the surrounding image may include a 3D image of the surroundings of the specified land. This surrounding image may be constructed separately from the specified land image, or may be part of the land image. This allows the surroundings of the building to be accurately understood when constructed in a composite image that combines the image of the building and the land. Furthermore, if there are neighboring buildings around or in the vicinity of the specified land, the surrounding image may include images of the interior and windows of the neighboring buildings.

[0033] The restriction information storage unit 1C is a storage unit that stores restriction information related to legal or physical restrictions when constructing a specific building on a specific piece of land. The restrictions are information specific to each piece of land or the area where the land is located.

[0034] 4, the restriction information storage unit 1C stores, for each land ID that identifies land, standard information for determining restrictions such as building coverage ratio, floor area ratio, height restrictions, road slope restrictions, neighboring land slope, north side slope, and shadow regulations. However, all of this information is merely an example, and any information that serves as a criterion for determining restrictions when constructing a building on a specific piece of land can be included as appropriate.

[0035] By referring to this restriction information storage unit 1C, it is possible to determine whether or not there are legal or physical restrictions when constructing a specific building on a specific piece of land.

[0036] The map information storage unit 1D is a storage unit that stores a map that allows visual recognition of the location and shape of the land stored in the land information storage unit 1B. This map is, for example, composed of a two-dimensional map image, and this land image allows recognition of the plots of land, the boundaries with neighboring land, and even the planar shape of the land.

[0037] By referring to this map information storage unit 1D, the location and surroundings of a given piece of land can be ascertained. Also, as will be described later, by superimposing a floor plan, which is a two-dimensional image of a building at a reduced scale, on a map image showing the division and planar shape of the given piece of land, it is possible to ascertain whether the building will fit on the given piece of land, and furthermore, in what direction the building will be fitted.

[0038] The optional parts storage unit 1E is a storage unit that stores optional parts made up of three-dimensional images to be displayed in a composite image in which a building image is composited with a land image. The optional parts may be anything that helps to give a realistic image of what a building will look like on the land, such as plants, gateposts, retaining walls, fences, warehouses, cars, etc., each of which may be available in a variety of types or designs. In addition to three-dimensional images, the optional parts storage unit 1E also stores two-dimensional images corresponding to the three-dimensional images, allowing optional parts made up of the two-dimensional images to be placed on land displayed in two dimensions, thereby determining the placement of the optional parts.

[0039] The extraction processing unit 11 executes a process of extracting predetermined information by referring to each information storage unit. For example, during processing by the determination processing unit 12, predetermined information is extracted from the building information storage unit 1A, the land information storage unit 1B, and the restriction information storage unit 1C, and this information is provided to the determination processing unit 12.

[0040] The determination processing unit 12 executes a determination process to determine whether a predetermined building can be built on a predetermined land selected by the user regardless of legal or physical restrictions, i.e., whether the building restrictions can be met. In the determination process, the user selects the predetermined land and the predetermined building that the user wishes to build on the predetermined land, specifies the location and orientation of the building on the predetermined land, and specifies the ground line (ground surface) when the predetermined building is built, and uses this information in the determination process.

[0041] In specific processing, the necessary information for each item to be judged is extracted from the building information storage unit 1A, land information storage unit 1B, and restriction information storage unit 1C, and the numerical values ​​to be compared with standards such as building coverage ratio, floor area ratio, height restrictions, road slope restrictions, neighboring land slope, north side slope, and shadow regulations are appropriately calculated and compared with those numerical values. For example, when executing a determination process regarding a building height limit, first, based on the user's selection of a specific piece of land and a specific building, information regarding the height of the specific building and the height limit for the specific piece of land is acquired, and then, it is determined whether the specific height limit for the specific piece of land can be met if the specific building is built on the specific piece of land. In addition, when performing a judgment process regarding shadow regulations, the system calculates the shadows that occur when the starting point of sunlight is set at a position specified by law for the composite image, as well as the shadow duration that accompanies changes in sunlight over time, and determines whether the specified regulations can be met. The determination processing by the determination processing unit 12 may be performed for all items registered in the restriction information storage unit 1C, or may be performed for only any of the items.

[0042] The synthesis processing unit 13 synthesizes the building image with the land image to generate a synthesized image. In the image synthesis process by the synthesis processing unit 13, the vertical and horizontal positions of the building image relative to the land image are adjusted.

[0043] In terms of the vertical direction, the vertical coordinates of a specific point on a given piece of land designated by the user as a GL reference point are used as the ground line, and the building image is superimposed on the land image. In other words, actual land may be undulating, and the location of the ground line determines the actual height of the building and the necessity and content of land development or retaining wall construction. By receiving a designation of a point on a given piece of land that will be the GL reference point, it is possible to determine how the building will be constructed if that point is selected. The vertical coordinates of the specified point can be obtained by referencing the land information storage unit 1B.

[0044] Regarding the horizontal direction, information regarding the position and orientation of a specific building relative to a specific piece of land is acquired in advance from the user, and this information is reflected. Information regarding the position and orientation of the building relative to the land can be acquired, for example, by showing the user two-dimensional images of the land and building layout, and having the user place the two-dimensional image of the building layout on the two-dimensional image of the land in a position and orientation of their choice.

[0045] The composite image generated in this way is output on the screen using Ajax or similar software, and the user can view the composite image from various angles by performing appropriate operations to understand how the building will stand on the land.

[0046] The editing processor 14 executes a process to edit gaps and / or overlaps that occur between the land image and the image of another store in the composite image. That is, when a building image is composited onto a land image using a specified point designated on a specified piece of land as a ground line, if the land is uneven, gaps may occur between the building foundation and the land, or overlaps may occur where the building foundation in the building image sinks into the land in the land image. The editing processor 14 edits such gaps and overlaps by inserting images of retaining walls or construction into the gaps, or by excavating the land at the overlapping points, thereby turning the composite image into an edited image of the actual construction or work that has been carried out. In addition, images for retaining walls and construction used in the synthesis process may be stored, for example, in the optional parts storage unit 1E, and the user may be able to select the desired type, or the editing processing unit 14 may select and use ones that have been set in advance.

[0047] The input / output unit 15 is a functional unit that enables the input and output of data, and is realized by data input means such as a keyboard, mouse, or microphone, output means such as a display or speaker, or a touch panel display that integrates input and output means.

[0048] Regardless of this embodiment, the image generating device 1 can be configured to communicate with a specified terminal such as another personal computer or a portable data communication terminal via a network such as the Internet, and only data input and output can be performed on the specified terminal. [Example]

[0049] An example of a process flow and a screen executed by the image generating device 1 according to the first embodiment will be described with reference to FIGS. First, the image generating device 1 refers to the map information storage unit 1D and displays a predetermined piece of land for which a composite image is to be generated on a map (S101). Figure 6 is an example of a screen showing a map of a specified piece of land. The specified piece of land is displayed in the center by a plot display frame G10 (shown by a dashed line in this example), and the roads and land surrounding the specified piece of land are also displayed.

[0050] The user places a floor plan image of a predetermined building on a predetermined piece of land shown on the map (S102). 7 shows an example of a screen in which a floor plan image G20 of a specific building is placed on a specific piece of land. On the screen, the floor plan image G20 of the specific building is provided as an object that can be operated by the user, and can be moved up, down, left, right, or rotated according to the user's operation. This allows the user to understand from the floor plan which direction each room faces or whether it faces the road.

[0051] In addition, depending on the user's operation, if the floor plan image G20 of a specified building is placed in an unconstructible state, such as extending beyond the specified land plot (plot display frame G10), an error message or the like may be displayed. The floor plan image G20 of a specific building may be selected by the user from a list of multiple floor plan images presented based on information stored in the building information storage unit 1A. In this case, the floor plan images presented to the user may consist only of buildings that can be constructed on a specific piece of land. A search form may also be provided that allows the user to narrow down the desired floor plan by cost or floor plan configuration.

[0052] When arranging the floor plan image G20, optional parts can be arranged as appropriate (S103). The image generating device 1, for example, refers to the optional parts storage unit 1E and presents the optional parts to the user so that they can be selected. Fig. 11 shows a state in which the optional part G21 has been arranged. That is, the user can arrange the desired optional part G21 at any position on a predetermined plot of land, similar to the floor plan image G20. This allows, for example, the user to arrange a car object in an empty space beside a building arranged as the floor plan image G20, or to arrange a tree object between a neighboring house.

[0053] Also, a retaining wall appropriately placed between the building and the land may be selected as the optional part G21. That is, as will be described later with reference to Fig. 9, if a gap G41 occurs as a result of combining the land image and the building image by the combining processing unit 13, a retaining wall that fills this gap G41 may be selected as the optional part G21.

[0054] Once the layout of the floor plan has been decided, the user designates a predetermined point as the GL reference point on the predetermined land (S104). 8 shows an example of a screen used when a user specifies a point that will be a GL reference point on a given piece of land. On this screen, a land image G30 of the given piece of land and the surrounding environment of the given piece of land are displayed in three dimensions based on the data stored in the building information storage unit 1A and the land information storage unit 1B.

[0055] The user operates a cursor G31 for specifying a GL reference point to specify an arbitrary position on a predetermined piece of land as point P, which will be the GL reference point. In addition, with regard to the operation of the cursor G31 by the user, for any point on the land image G30 where the cursor G31 is placed by the user, the land information storage unit 1B may be referenced and a numerical value indicating the height of the point may be displayed.

[0056] When the user designates a point P that serves as a GL reference point, the image generating device 1 generates a composite image using the synthesis processing unit 13 (S105). FIG. 9 is an example of a screen showing a composite image in which a land image G30 of a predetermined land is combined with a building image G40 of a predetermined building. In generating a composite image, a building image G40 of a predetermined building corresponding to the floor plan image G20 and a land image G30 of a predetermined land corresponding to the block display frame G10 are extracted from the building information storage unit 1A and the land information storage unit 1B. Then, the vertical position of the extracted building image G40 is set using a point P designated by the user as the GL reference point. Furthermore, the horizontal position and orientation of the building image G40 on the land image G30 are set according to the position and orientation of the floor plan image G20 arranged by the user.

[0057] 9, as a result of the undulations of the specified land, when point P specified by the user is set as the GL reference point, it can be seen that a gap G41 occurs between the foundation of the specified building and the land, and an overlapping portion G42 occurs where the foundation of the specified building cuts into the land. Note that the gap G41 and the overlapping portion G42 may be given an identification effect such as shading, color, or dashed line to make the corresponding portion easily identifiable.

[0058] The edit processing unit 14 edits the gaps G41 and overlapping portions G42 that occur in the composite image (S106). 10 is an example of a composite image edited by the editing processing unit 14. In the edited image obtained by editing the composite image, a retaining wall G43 is installed in a gap G41 between a land image G30 and a building image G40, and the land at an overlapping portion G42 is excavated. The retaining wall G43 is extracted from the optional parts storage unit 1E, and this may be extracted and used from a predetermined part by the editing processing unit 14, or may be selected by the user when arranging the floor plan image G20.

[0059] The editing process by the editing processing unit 14 can be executed based on a subsequent instruction from the user after the composite image generated by the composition processing unit 13 has been output to the user, or can be executed without outputting the composite image to the user. Also, the selection of a retaining wall G43 as an optional part for filling the gap G41 and the selection of whether to excavate the overlapping portion G42 may be accepted from the user once the composite image has been output to the user.

[0060] 12 shows another example of an edited image, which is generated based on the two-dimensional image shown in FIG. In this example, a retaining wall G43 that is taller than the above-mentioned retaining wall G43 is placed on the building image, and a tree G44 that is a three-dimensional version of the optional part G21 is also placed. This reflects what the user selectively placed in the processing of S103. When the three-dimensional image of the optional part G21, such as the tree G44, is displayed as a three-dimensional image by the synthesis processing unit 13, the vertical position of the three-dimensional image of the optional part G21 is set using a point P specified by the user as the GL reference point.

[0061] In the above-described process S104, when the user sets the GL reference point, the GL reference point may be set at a position higher or lower by a predetermined height from the point designated by the user. For example, the GL reference point may be set by inputting a specific value, such as 1 m higher than the designated point. [Example]

[0062] FIG. 13 shows the flow of processing executed by the image generating device 1 according to the second embodiment. In this embodiment, the image generating device 1 determines, by the determination processing unit 12, whether or not construction restrictions will be imposed if a building is constructed using a point on the land designated by the user as the GL reference point. In the description of FIG. 13, the same processes as those described in FIG. 5 are denoted by the same reference numerals, and the description thereof will be omitted where appropriate.

[0063] In this embodiment, when a user designates a predetermined point as a GL reference point on a predetermined piece of land (S104), the determination processing unit 12 executes a determination process (S201). In the judgment process, when a specified building is constructed on a specified piece of land using a point designated by the user as the GL reference point, it is judged whether construction is possible regardless of legal or physical restrictions, i.e., whether construction restrictions can be met. In this judgment process, the judgment processing unit 12 acquires the building and land information necessary for judgment from the building information storage unit 1A and the land information storage unit 1B, and compares it with the information that serves as the basis for judgment, which is stored in the restriction information storage unit 1C.

[0064] As a result, if the construction restrictions can be met, the process proceeds to the above-described processing from S105 onwards. In this case, a message to the effect that the restrictions can be met may be presented to the user.

[0065] On the other hand, if the result of the determination is that the architectural restrictions cannot be met, the user is requested to re-specify the GL reference point (S202). As a result, when the designation of the GL reference point is received again from the user, the determination processing unit 12 executes the determination processing again.

[0066] In this example, the judgment by the judgment processing unit 12 may be performed on all items stored in the restriction information storage unit 1C, or on some of them, or on items arbitrarily specified by the user.

[0067] Furthermore, regardless of the result of the determination process by the determination processing unit 12, it is possible to proceed to the generation of a composite image (S105) and further to the editing of the composite image (S106). In this case, a message indicating that the architectural restrictions have not been cleared may be displayed on the output screen of the composite image or edited image. Furthermore, when there are multiple items for which determination processing is performed, it is preferable to make it clear which item is subject to the restrictions.

[0068] Furthermore, the timing of execution of the judgment process by the judgment processing unit 12 may be after the generation of the composite image (S105) or after the editing of the composite image (S106), either automatically or in response to an instruction from the user.

[0069] According to the image generating device 1 of this embodiment described above, it is possible to set a ground line when generating an image of a building constructed on land, and as a result, it is possible to generate an accurate image.

[0070] ●Other modified examples The image generating device 1 according to the present embodiment described above can also be configured as the following modified examples, for example.

[0071] <Presenting selectable points> As an example, when a user specifies a point on a land image that will be a GL reference point, the points may be presented to the user in a selectable manner. 14 shows an example of a screen in which points to be set as GL reference points are presented in a selectable manner. In this example, the user can select points P1 to P5, numbered 1 to 5, as GL reference points. Each point given as a choice here may be configured as a point that, as a result of processing executed in advance by the determination processing unit 12, does not impose construction restrictions even if a building is constructed using that point as a GL reference point.

[0072] <Point Recommendations> In another example, when a user specifies a point on a land image to be a GL reference point, a suitable point may be recommended. 15 shows an example of a screen for recommending such a point. On the screen, the point recommended to the user as a GL reference point is shown as point P6, indicated by a star, on a land image G30.

[0073] Here, the recommendation criteria may be, for example, an evaluation based on the cost of land development and excavation, or an evaluation based on the line of sight or gaze of neighboring houses. Since the recommended points may vary depending on the evaluation content, the user may specify the type of evaluation they value, and recommended points may be presented to the user according to the specified type of evaluation. Furthermore, the evaluation of a specific piece of land may be pre-registered in the land information storage unit 1B as information for each point, or may be calculated according to a predetermined algorithm in response to the user's selection of land. For example, if a specific point is set as the GL reference point, the cost can be calculated by calculating the amount of construction work required, such as land development, excavation, and the generation of surplus soil, and multiplying this by the unit price.

[0074] Furthermore, point recommendations may be made by receiving proposals from contractors specializing in construction work such as land development and excavation, and presenting these to the user. That is, information on a specific building and specific land is provided as data to a contractor terminal used by such a contractor, and information related to point recommendations as a result of consideration based on the data is received from the contractor terminal and presented to the user. In this case, not only point recommendations but also information such as proposals and estimates for the construction content, delivery dates, construction periods, scheduled start dates, and scheduled completion dates may be received from the contractor terminal and presented to the user.

[0075] <Checking the line of sight from the building and neighboring houses> In a composite image in which a building image is combined with a land image using a specified point on a specified piece of land as the GL reference point, it may be possible to grasp the surrounding area, including neighboring houses, as seen from a window of the specified building, or the appearance of the specified building as seen from neighboring houses, etc. Specifically, by storing information about the window layout of a specific building and setting up a virtual viewpoint as a base point from which to direct the line of sight toward the building when a building is constructed on a specific piece of land, it is possible to grasp the direction and angle of the line of sight that is expected to reach inside the building. The direction and angle of the line of sight, as well as the distance from the viewpoint to the window, may be evaluated as numerical values, and the evaluation may be presented to the user.

[0076] If the processing results of the image generation device 1 described above could be output on a website, such a website could become a platform in which various players involved in real estate could participate. Such a platform site could accumulate various data, such as information on the actual supply and demand of real estate and utilization methods based on expert knowledge, and this accumulated data would also be useful in data science. In other words, complex data analysis based on the accumulated data could uncover new or previously unnoticed ways of utilizing real estate, and could even lead to approaches that derive knowledge that is beneficial not only to specific players involved in real estate but to society as a whole. [Explanation of symbols]

[0077] 1: Image generating device 1A: Building information storage unit 1B:Land information storage section 1C: Restriction information storage section 1D: Map information storage section 1E: Optional parts storage section 11: Extraction processing section 12: Judgment processing unit 13: Composition processing section 14: Editing processing section 15: Input / output section G20: Floor plan image G30: Land Image G40: Building image G41: Gap G42: Duplicate P: Point

Claims

1. a building information storage means for storing a building image relating to a three-dimensional image of a predetermined building; a land information storage means for storing a land image relating to a three-dimensional image of a predetermined land and information relating to the height of each predetermined position on the predetermined land; a designation receiving means for receiving designation of a predetermined point on the three-dimensional image of the predetermined land as a GL reference point that serves as a reference for a ground line on the predetermined land; a synthesis processing means for synthesizing the building image with the land image using the height of the specified point as a ground line to generate a synthesized image; and an output means for outputting the composite image on a screen. Image generating device.

2. The method further comprises: a distinguishing effect imparting means for imparting a distinguishing effect to a gap or overlapping portion occurring between the specified land and the specified building in the composite image; 2. The image generating device according to claim 1.

3. and an output unit for outputting the composite image, in which gaps and / or overlapping portions occurring between the land image and the building image in the composite image have been edited, as an edited image.

3. The image generating device according to claim 1 or 2.

4. The method further comprises editing means for editing gaps and / or overlaps occurring between the land image and the building image in the composite image.

4. The image generating device according to claim 3.

5. The method further comprises a determination means for determining whether or not construction restrictions can be met when the building is constructed on the land using the vertical coordinate of the specified point as a ground line.

5. An image generating device according to claim 1.

6. the determining means determines whether or not a height restriction specific to the land can be cleared when the building is constructed on the land with the height of the designated point as a ground line; The building information storage means stores information relating to the height of the building, The land information storage means stores information relating to height restrictions specific to the land.

6. The image generating device according to claim 5.

7. the determining means determines whether or not the building will clear the shadow restrictions on the surrounding area when the building is constructed on the land using the vertical coordinate of the specified point as a ground line; The land information storage means stores information regarding shadow restrictions on the surrounding area for the land.

7. The image generating device according to claim 5 or 6.

8. The land image includes an image of the land's surroundings.

8. An image generating device according to any one of claims 1 to 7.

9. The synthesis processing means The building image is superimposed on the land image based on a value obtained by adding or subtracting a predetermined value from the height of the designated point.

9. An image generating device according to any one of claims 1 to 8.

10. The method further includes a recommendation unit that displays a point to be recommended as the predetermined point in the land image.

10. An image generating device according to any one of claims 1 to 9.

11. The system further comprises a presentation means for receiving, from a contractor terminal, a proposal or estimate for construction work in the case of building the specified building on the specified land with the height of the specified point as a ground line, and presenting the proposal or estimate for the construction work.

11. An image generating device according to any one of claims 1 to 10.

12. a building information storage means for storing a building image relating to a three-dimensional image of a predetermined building; and a land information storage means for storing a land image relating to a three-dimensional image of a predetermined land and information relating to the height of each predetermined position on the predetermined land, a designation receiving process for receiving designation of a predetermined point on the three-dimensional image of the predetermined land as a GL reference point that serves as a reference for a ground line on the predetermined land; a synthesis process of synthesizing the building image onto the land image using the height of the specified point as a ground line to generate a synthesized image; and performing an output process of outputting the composite image on a screen. Image generation method.

13. a building information storage means for storing a building image relating to a three-dimensional image of a predetermined building; a land information storage means for storing a land image relating to a three-dimensional image of a predetermined land and information relating to the height of each predetermined position on the predetermined land, a designation receiving process for receiving designation of a predetermined point on the three-dimensional image of the predetermined land as a GL reference point that serves as a reference for a ground line on the predetermined land; a synthesis process of synthesizing the building image onto the land image using the height of the specified point as a ground line to generate a synthesized image; an output means for outputting the composite image on a screen; Computer program.

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