JP2017084005A - Three-dimensional model display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a three-dimensional model display device that allows users to easily grasp a position relation between an instruction position represented by a cursor or marker and a three-dimensional model, or a layout state of the three-dimensional model at the instruction position.SOLUTION: With a three-dimensional model stored in three-dimensional storage means 30, instruction position setting means 33 is configured to set instruction position on the three-dimensional model in accordance with an instruction operation of a user. With a three-dimensional mark and a reference point of the three-dimensional mark stored in three-dimensional mark storage means 34, three-dimensional mark synthesis means 41 is configured to combine the three-dimensional mark aligned with the reference position with the three-dimensional model at the set instruction position. Three-dimensional map projection means 42 is configured to, according to a camera parameter of a virtual camera virtually photographing the three-dimensional model stored in virtual camera information storage means 31, project the three-dimensional model having the three-dimensional mark combined to an imaging plane of the virtual camera to generate a projection image. Display control means 43 is configured to cause a display unit 5 to display the generated projection image.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a three-dimensional model display device that displays a projection image of a three-dimensional model, and more particularly to a three-dimensional model display device that combines and displays a three-dimensional mark representing a cursor or a marker with a three-dimensional model.

  In recent years, an apparatus for displaying a three-dimensional model such as a three-dimensional map or a three-dimensional building model has been put into practical use. In such a display device, a cursor and a marker for designating and storing a point and changing a field of view are displayed together with the projection image of the three-dimensional model.

  Conventionally, in these display devices, a cursor or marker is displayed as a plane figure, or a solid arrow or a tip of a pin is displayed so as to indicate the position of the cursor or marker.

  For example, in Patent Document 1, a solid arrow is displayed as a cursor, and the cursor position is in the direction indicated by the arrow.

JP 2002-319038 A

  However, in the prior art, there is a problem that it is difficult to grasp the positional relationship between the point indicated by the cursor or marker and the three-dimensional model and the arrangement state of the three-dimensional model at that point.

  This point will be described with reference to FIG. FIG. 8 shows an example of a projection image 600 obtained by projecting a three-dimensional model of a building and a road. In the projected image 600, a cursor 611 is displayed as a solid arrow together with buildings and roads, and markers 621 and 631 are displayed as flat circles. Wall texture and road texture are affixed to the 3D model.

  For example, when the user views the projection image 600, it is difficult to immediately grasp whether the tip of the cursor 611 is in contact with or away from the wall surface 610. Similarly, it is difficult to immediately grasp whether the marker 621 is in contact with or away from the roof 620. Further, the road surface 630 has the texture of the vehicle pasted on the plane data, but when the user looks at the projection image 600, it immediately understands whether or not the three-dimensional model of the vehicle is arranged. It ’s difficult.

  The present invention has been made in view of the above problems, and a user can easily grasp the positional relationship between a designated position indicated by a cursor or a marker and a three-dimensional model, and the arrangement state of the three-dimensional model at the designated position. An object is to provide a display device.

  In order to solve such a problem, a stereoscopic model display device according to the present invention includes a stereoscopic model storage unit that stores a stereoscopic model represented by arrangement data of a plurality of constituent surfaces constituting a predetermined target, and a user instruction An instruction position setting unit that sets an instruction position on the configuration surface of the three-dimensional model according to an operation, a three-dimensional mark represented by predetermined three-dimensional shape data, and a reference point set inside the three-dimensional mark are stored. 3D mark storage means, 3D mark combining means for positioning the reference mark at the indicated position and combining the 3D model with the 3D model, and a virtual camera camera for virtually photographing the 3D model Virtual camera information storage means for storing parameters, and the three-dimensional model in which the three-dimensional mark combining means combines the three-dimensional marks, according to the camera parameters A three-dimensional model projection means for generating a projection image projected to the imaging plane of the serial virtual camera, characterized by comprising a display control means for displaying the projection image on a predetermined display means.

  According to such a configuration, the indication position indicated by the cursor or marker is set on the configuration surface of the stereoscopic model, and the reference point of the stereoscopic mark is set inside the stereoscopic shape. It is displayed as a projected image hidden on the component surface. This display allows the user to easily grasp the positional relationship between the designated position and the three-dimensional model and the arrangement state of the three-dimensional model at the designated position.

  In the three-dimensional model display device of the present invention, the three-dimensional mark storage unit further stores a reference size and a size lower limit value of the three-dimensional mark, and the three-dimensional mark composition unit aligns the reference point with the designated position. The projection mark is calculated by projecting the three-dimensional mark having the reference size onto the photographing surface according to the camera parameters, and when the projection size is less than the size lower limit value, the three-dimensional mark is enlarged larger than the reference size. Then, it may be configured to be synthesized with the three-dimensional model.

  The stereoscopic model display device of the present invention further includes display area information storage means for storing a display area size of an area for displaying the projection image on the display means, and the stereoscopic mark synthesizing means includes the imaging surface. The size lower limit value is corrected in accordance with the relationship between the size of the display area and the display area size, and when the projection size is less than the corrected size lower limit value, the solid mark is enlarged to be larger than the reference size and the solid model It is good also as composition which synthesizes.

  The solid mark is preferably a sphere, and the reference point is preferably the center of gravity of the solid mark.

  According to the present invention, the user can easily grasp the positional relationship between the designated position and the three-dimensional model and the arrangement state of the three-dimensional model at the designated position.

It is a block diagram which shows the structure of the three-dimensional map display apparatus which concerns on one Embodiment of this invention. It is a functional block diagram of map display processing / control of a three-dimensional map display device concerning one embodiment of the present invention. It is a figure explaining the setting process example of an instruction | indication position. It is a figure explaining the example of data of the indication position which a storage part memorizes. It is a figure explaining the example of the solid mark which concerns on this invention. It is the schematic diagram which illustrated the mode of the solid mark synthetic | combination process which concerns on this invention. It is the figure which showed the example of the projection image of the stereo model by this invention. It is the figure which showed the example of the projection image of the stereo model by a prior art. It is a flowchart explaining operation | movement of the three-dimensional map display apparatus which concerns on one Embodiment of this invention.

  Hereinafter, as an embodiment of the present invention, an example of a 3D map display device that displays a 3D map using the 3D model display device of the present invention will be described.

[Configuration of the stereoscopic map display device 1]
FIG. 1 is a block diagram showing a schematic configuration of the three-dimensional map display device 1. The three-dimensional map display device 1 includes an operation unit 2, a storage unit 3, and a display unit 5 connected to a processing / control unit 4.

  The operation unit 2 is an operation unit that is connected to the processing / control unit 4, receives an instruction operation from a user, and inputs operation information corresponding to the instruction operation to the processing / control unit 4. The operation unit 2 includes a pointing device, a keyboard, an interface circuit, and driver software. The operation unit 2 receives signals from the pointing device and the keyboard by the interface circuit, and converts them into operation information using the driver software. The pointing device is a mouse, a touch panel, a pen tablet, a track pad, a game controller, or the like. The operation information includes the position of the pointer in the xy coordinate system on the screen of the display unit 5 according to the amount of movement of the mouse or pen, the touch position of the finger or pen on the touch panel or pen tablet, the click operation of the mouse or the pen Contains information related to user decision-making according to switch operations, etc., and character codes using the keyboard.

  The user performs an instruction operation for instructing the pointer position and an instruction operation for instructing to record the pointer position as the marker position via the operation unit 2.

  The storage unit 3 is a storage unit that stores various programs and various data and inputs / outputs such information to / from the processing / control unit 4. The storage unit 3 includes a memory device such as a ROM (Read Only Memory), a volatile RAM (Random Access Memory), and a nonvolatile RAM.

  The processing / control unit 4 is configured by an arithmetic device such as a CPU (Central Processing Unit), a GPU (Graphic Processing Unit), or an MCU (Micro Control Unit). The processing / control unit 4 operates as various processing / control units by reading and executing a program from the storage unit 3. That is, the processing / control unit 4 performs storage control for reading various data from the storage unit 3 and storing them appropriately. The processing / control unit 4 performs display control for causing the display unit 5 to display various data processing and processing results according to the operation information from the operation unit 2.

  The display unit 5 is a display unit that displays a processing result or the like input from the processing / control unit 4 so that the user can visually recognize the information. The display unit 5 is configured by a liquid crystal display, a CRT display, or the like.

[Function of 3D map display device 1]
FIG. 2 is a functional block diagram relating to map display processing / control of the three-dimensional map display device 1.

  For map display processing / control, the storage unit 3 operates as a three-dimensional map storage unit 30, a virtual camera storage unit 31, a display area storage unit 32, a designated position storage unit 33, a three-dimensional mark storage unit 34, and the like. Further, for the map display processing / control, the processing / control unit 4 operates as an indicated position setting unit 40, a three-dimensional mark composition unit 41, a three-dimensional map projection unit 42, a display control unit 43, and the like.

  The three-dimensional map storage means 30 stores in advance a three-dimensional map represented by the arrangement relationship of a plurality of constituent surfaces.

  A three-dimensional map is created for each of the building faces and roofs, the ground, road surfaces, hills, mountains, sea surfaces, etc. This is data representing the configuration surface data and the arrangement of the configuration surface data in an XYZ coordinate system of a virtual space that simulates real space.

  The three-dimensional map may further include texture information such as aerial photographs taken of the building and terrain corresponding to the component surface data in each component surface data.

  That is, the three-dimensional map storage unit 30 is a three-dimensional model storage unit that stores a three-dimensional model represented by arrangement data of a plurality of constituent surfaces constituting a predetermined target.

  The virtual camera storage unit 31 stores camera parameters of a virtual camera that virtually captures a three-dimensional map in a virtual space.

  Camera parameters consist of external parameters and internal parameters. The external parameters include the position (viewpoint) of the virtual camera in the XYZ coordinate system, the shooting direction, and the angle of view. Internal parameters include the focal length, center coordinates, and distortion coefficient of the virtual camera. By applying this camera parameter to the pinhole camera model, the coordinates of the XYZ coordinate system can be converted into the uv coordinate system representing the imaging plane of the virtual camera.

  The external parameter can be set in advance and stored in the virtual camera storage unit 31, but may be changed according to the operation of the operation unit 2 by the user or according to the preset setting. Internal parameters are set in advance and stored in the virtual camera storage unit 31.

The display area storage means 32 displays the position (x _D , y _D ) and size (W _Dx × H _Dy ) of the display area (window) set for displaying a map in the xy coordinate system of the screen of the display unit 5. The display area information is stored. The display area information can also include the position (u _D , v _D ) and size (W _Du × H _Dv ) of the display area in the uv coordinate system of the imaging surface of the virtual camera.

  The display area information can be set in advance and stored in the display area storage unit 32, but may be changed according to the operation of the operation unit 2 by the user.

  Operation information from the operation unit 2 is sequentially input to the designated position setting unit 40. The designated position setting means 40 sets the designated position on the composition plane of the three-dimensional map in accordance with the user's instruction operation. That is, the designated position is calculated and stored in the designated position storage means 33.

  With reference to FIG. 3, an example of setting processing of the designated position will be described.

When the user 100 performs an instruction operation via the operation unit 2, operation information corresponding to the instruction operation is input to the instruction position setting unit 40. The pointing position setting unit 40 refers to the display area information, acquires the pointer position 102 in the display area 101 of the display unit 5 from the operation information, and sets the pointer position 102 in the xy coordinate system to the uv of the imaging surface 111 of the virtual camera 110. Convert to coordinate system. That is, the conversion 103 is performed by multiplying the coordinates of the pointer position 102 by the ratio {(W _Iu × H _Iv ) / (W _Dx × H _Dy )} of the size of the imaging surface 111 to the size of the display area 101. The size (W _Iu × H _Iv ) of the imaging surface 111 can be derived from the angle of view included in the camera parameters.

  Next, the designated position setting means 40 calculates a back projection line 121 from the pointer position 112 of the uv coordinate system to the XYZ coordinate system of the 3D map 120 using the camera parameters, The intersection 122 of the back projection line 121 is detected and the intersection 122 is set as the designated position. When an intersection with a plurality of constituent surfaces is detected, the intersection with the shortest distance from the imaging surface 111 is set as the designated position.

  The designated position setting means 40 sequentially overwrites and stores the designated position in the first area of the designated position storage means 33 as the current pointer position (so-called cursor position). In addition, when the information related to the user's decision making included in the operation information indicates an instruction operation for separately storing the instruction position as a marker position, the instruction position setting unit 40 stores the current pointer position in the instruction position storage unit 33. It is also stored in the second area.

  The instruction operation for storing the marker position is determined in advance as, for example, a right click of the mouse and a subsequent left click at a predetermined menu display position. Further, the following character code may be stored in association with the designated position as a marker description (such as a building name). In addition, in order to be able to read the marker position set in the past, the second area is provided in the nonvolatile memory device, and the marker position is stored in the nonvolatile memory device. On the other hand, the first area is provided in the volatile memory device from the viewpoint of the update speed, and the cursor position is stored in the volatile memory device.

  FIG. 4 illustrates the data of the designated position stored by the designated position storage unit 33.

In this example, the pointing position storage means 33 stores the coordinates of the cursor (X ₀ , Y ₀ , Z ₀ ) as the pointing position 200. In addition, the indication position storage means 33 uses the coordinates (X ₁ , Y ₁ , Z ₁ ) of the marker # 1 as the indication position 201, the character code “XX station entrance”, and the coordinates (X ₂ , Y) of the marker # 2. ₂ , Z ₂ ) and the character code “vehicle” which is an explanation thereof.

  The solid mark storage means 34 stores in advance a solid mark represented by predetermined solid shape data, a reference point set inside the solid mark, a reference size of the solid mark, and a size lower limit value of the solid mark. Yes.

  The solid mark is solid figure data drawn as a cursor and a marker. It is desirable that the reference point of the solid mark can be easily estimated from the outer shape when the user visually recognizes it. For example, as shown in FIG. 5, the shape of the solid mark is a sphere 300, and the reference point is the center of gravity 301 of the sphere 300. can do. From the same viewpoint, the shape of the solid mark may be a regular polyhedron, and the reference point may be the center of gravity of the regular polyhedron. For example, the shape of the solid mark can be the regular icosahedron 310 and the reference point can be the center of gravity 311 thereof. Similarly, the shape and reference point may be a regular dodecahedron 320 and its center of gravity 321, a regular octahedron 330 and its center of gravity 331, a regular hexahedron 340 and its center of gravity 341, or a regular tetrahedron 350 and its center of gravity 351.

  Further, from another viewpoint of adding a direction attribute to a three-dimensional mark, a rotary body such as a cylinder or an ellipsoid may be used.

  The reference size is set so large that it is easy for the user to visually recognize the boundary line between the three-dimensional mark and the constituent surface of the three-dimensional map, and small enough that the three-dimensional mark does not excessively hide the texture of the constituent surface. For example, the reference size can be 30 cm (the diameter of the sphere 300 is 30 cm). The size lower limit value will be described later.

  The three-dimensional mark composition unit 41 synthesizes the three-dimensional mark into a three-dimensional map by aligning the reference point with the designated position, and outputs the combined three-dimensional map to the three-dimensional map projection unit 42. That is, the solid mark combining means 41 is a means for combining a solid mark with a solid model.

  Specifically, first, the three-dimensional mark composing unit 41 obtains the three-dimensional map from the three-dimensional map storage unit 30, the designated position from the designated position storage unit 33, and the three-dimensional mark shape, reference point, and reference size from the three-dimensional mark storage unit 34. Respectively. Then, the three-dimensional mark composing means 41 draws a three-dimensional mark having a predetermined shape on the three-dimensional map with the indicated position as a reference point. For example, a sphere having the indicated position as the center of gravity is drawn.

  FIG. 6 is a schematic view illustrating the state of the composition process by the three-dimensional mark composition means 41.

  In the three-dimensional map of this example, component plane data 400 representing the plane of the house roof is arranged. An indicated position 401 is set on the component plane data 400.

  The three-dimensional mark combining means 41 combines a sphere 402 with the designated position 401 as the center of gravity into a three-dimensional map. Thereby, the part indicated by the solid line of the sphere 402 appears on the front side of the component surface data 400, and the part indicated by the dotted line is hidden behind the component surface data 400. If this is projected, the user can clearly perceive that the constituent plane data 400 is arranged by the boundary line between the constituent plane data 400 and the sphere 402.

  Note that the solid mark combining means 41 may draw a predetermined balloon figure connected to the solid mark in addition to drawing the solid mark at the marker position.

  By the way, when the camera parameter of the virtual camera is a variable value and the reference size is a fixed value, the solid mark displayed on the display unit 5 when the camera position is set high or the angle of view is set wide. Becomes too small and visibility decreases. Therefore, the three-dimensional mark composing means 41 performs control so that the three-dimensional mark does not become too small based on the above-described size lower limit value.

  The size lower limit value is a limit value for preventing the 3D mark from becoming too small as it becomes difficult for the user to visually recognize the boundary line between the 3D mark and the constituent surface of the 3D map. The size lower limit value may be set as an actual size, for example, 5 m, but can be set as a ratio to the area of the projection plane of the virtual camera (hereinafter referred to as an imaging plane ratio). The photographing in-plane ratio can be set to 1/2000, for example.

  Therefore, the three-dimensional mark composition unit 41 calculates a projection size by projecting a three-dimensional mark having a reference size obtained by aligning the reference point to the designated position on the photographing surface according to the camera parameter, and the projection size is less than the size lower limit value. The three-dimensional mark is enlarged to be larger than the reference size and is combined with the three-dimensional map.

Preferably, the three-dimensional mark composition means 41 uses the photographing in-plane ratio as the size lower limit value. That is, the three-dimensional mark composition means 41 calculates the ratio {M / (W _Iu × H _Iv )} of the projection size M to the size of the photographing surface, and when the ratio is less than the photographing surface ratio, the three-dimensional mark is calculated from the reference size. Is greatly enlarged and combined into a three-dimensional map. The enlargement ratio can be obtained by dividing the in-plane ratio by the calculated ratio {M / (W _Iu × H _Iv )}. In this way, even if the size of the display area is changed, the visibility can be maintained without correcting the setting of the size lower limit value.

Furthermore, it is possible to cause the three-dimensional mark composition means 41 to perform control in consideration of the relationship between the size of the photographing surface and the display area size. In this case, the solid mark combining means 41 corrects the in-plane ratio according to the relationship between the size of the shooting plane and the display area size, and if the projection size is less than the corrected in-plane ratio, the solid mark is made larger than the reference size. Is greatly enlarged and combined into a three-dimensional model. Specifically, the ratio within the imaging plane is corrected by multiplying the ratio within the imaging plane by the ratio of the display area size to the size of the imaging plane {(W _Du × H _Dv ) / (W _Iu × H _Iv )}. This makes it possible to maintain visibility without correcting the setting of the size lower limit value even if the relationship between the size of the imaging surface and the display area size is changed.

  The designated position is set on the composition plane of the three-dimensional map by the designated position setting means 40, and the reference point of the three-dimensional mark is set inside the three-dimensional shape. Therefore, the three-dimensional mark is drawn with a volume on both the front side and the back side of the constituent surface, in other words, in a state of being recessed into the constituent surface.

  The three-dimensional map projection unit 42 projects (renders) the three-dimensional map input from the three-dimensional mark composition unit 41 on the photographing surface of the virtual camera according to the camera parameters, generates a projection image, and outputs the projection image to the display control unit 43. That is, the three-dimensional map projecting unit 42 is a three-dimensional model projecting unit that projects a three-dimensional model obtained by synthesizing the three-dimensional mark by the three-dimensional mark synthesizing unit 41 onto a photographing surface of the virtual camera according to virtual camera information to generate a projected image.

  In the projection (rendering) process, the three-dimensional map projecting unit 42 projects only the front structural surface as viewed from the shooting position of the virtual camera by a hidden surface elimination method such as a Z buffer method or a Z sort method. That is, the three-dimensional mark is projected on the front side portion of the component surface, and is not projected on the back side portion of the component surface.

  When the 3D mark composing unit 41 adds a balloon figure to the 3D mark at the marker position, the 3D map projecting unit 42 stores a character string stored as a description of the marker in the area where the balloon figure is projected correspondingly. May be drawn.

  In the example of FIG. 3, the three-dimensional map 120 in which the three-dimensional mark 122 and the like are combined is projected onto the imaging surface 111 of the virtual camera by the projection processing of the three-dimensional map projecting unit 42.

  The display control unit 43 causes the display unit 5 to display the projection image generated by the three-dimensional map projection unit 42. For this purpose, the display control means 43 reads the position and size of the display area from the display area storage means 32, enlarges or reduces the projected image to the size of the display area, and designates the enlarged or reduced projected image as the position of the display area. At the same time, it is output to the display unit 5.

  In the example of FIG. 3, the projection image of the imaging surface 111 is converted into the projection image of the display area 101 by the conversion process of the display control unit 43.

  If the display area information includes the position and size of the display area in the uv coordinate system of the imaging surface of the virtual camera, the display control unit 43 cuts out the area indicated by the position and size from the projection image. Then, the cut-out projected image is enlarged or reduced.

  FIG. 7 is a schematic view illustrating a projected image 500 displayed on the display unit 5 by the three-dimensional map display device 1.

  In the projected image 500, a cursor 511, a marker 521, and a marker 531 are projected together with a three-dimensional model of a building or road. Wall texture and road texture are affixed to the 3D model.

  If the user looks at the shape of the cursor 511, it can be immediately understood from the state that the sphere is buried, that the constituent surface data 510 of the wall is arranged at the position of the cursor 511, and the position of the cursor 511 that is the center of gravity of the sphere. Can be immediately grasped on the component plane data 510. Similarly, the user can immediately grasp that the construction surface data 520 of the roof is arranged at the position of the marker 521 from the state where the sphere is buried, and the position of the marker 521 which is the center of gravity of the sphere is the construction surface of the roof. It can be immediately grasped that it is on the data 520.

  Further, the road surface is expressed by pasting the texture of the vehicle onto the plane configuration surface data 530. If the user looks at the shape of the marker 531, it can be immediately understood from the boundary line between the sphere and the road configuration surface data that the vehicle configuration surface data is not arranged.

[Operation of 3D Map Display Device 1]
The operation of the three-dimensional map display device 1 will be described with reference to the flowchart of FIG.

  After the 3D map display device 1 is activated, the operation information from the operation unit 2 is sequentially input to the processing / control unit 4. When the instruction position setting means 40 of the processing / control unit 4 acquires the operation information (S1), the pointer position indicates the display area by referring to the operation information and the display area information stored in the display area storage means 32. It is confirmed whether or not (S2).

  If the pointer position is outside the display area (NO in step S2), the pointing position setting means 40 returns the process to step S1 and waits for the input of the next operation information. On the other hand, if the pointer position is within the display area (YES in step S2), the designated position setting means 40 advances the process to step S3, and calculates the designated position corresponding to the pointer position (S3).

  That is, the pointing position setting unit 40 converts the pointer position of the xy coordinate system to the uv coordinate system with reference to the display area information, and further refers to the camera parameter stored in the virtual camera storage unit 31 to convert the uv coordinate. The back projection line of the XYZ coordinate system corresponding to the pointer position of the system is derived, and the XYZ coordinate of the intersection that first intersects with the back projection line among the intersection points of the back projection line and the configuration surface of the three-dimensional map is calculated as the designated position. .

  The designated position setting means 40 causes the calculated designated position to be overwritten and stored in the designated position setting means 40 as a cursor position (S4), and if the operation information includes a marker storage instruction (YES in S5), the calculation is performed. The designated position is additionally stored in the designated position setting means 40 as a marker position (S6). On the other hand, when the marker information is not included in the operation information (NO in S5), step S6 is omitted.

  Next, the solid mark combining means 41 calculates the projection size of the solid mark (S7). For this purpose, the three-dimensional mark composition means 41 uses the designated position stored in the designated position storage means 33, the information on the three-dimensional mark stored in the three-dimensional mark storage means 34, and the camera parameters stored in the virtual camera storage means 31. With reference to the reference position in the XYZ coordinate system, a three-dimensional mark is drawn by aligning the reference point, and this is projected onto the imaging surface of the virtual camera according to the camera parameters.

  Subsequently, the three-dimensional mark composition unit 41 calculates the area ratio of the projected image of the three-dimensional mark with respect to the photographing surface and compares it with the photographing surface ratio (size lower limit value) (S8).

  If the area ratio is less than the in-plane ratio (YES in step S8), the solid mark combining means 41 multiplies the reference size by the reciprocal of the area ratio to enlarge the solid mark (S9). On the other hand, when the area ratio is equal to or greater than the in-plane ratio (NO in step S8), step S9 is omitted and the size of the solid mark is determined to be the reference size.

  Subsequently, the three-dimensional mark composition means 41 reads the three-dimensional map from the three-dimensional map storage means 30, composes a three-dimensional map with a reference point aligned with the indicated position (S10), and processes the synthesized three-dimensional map. The information is output to the three-dimensional map projection means 42 of the control unit 4.

  The three-dimensional map projecting unit 42 projects (renders) the three-dimensional map of the XYZ coordinate system input from the three-dimensional mark synthesizing unit 41 according to the camera parameters stored in the virtual camera storage unit 31 onto the uv coordinate system. Generate (S11), and output the generated projection image to the display control means 43 of the processing / control unit 4.

  The display control unit 43 refers to the display area information stored in the display area storage unit 32, converts the projection image of the uv coordinate system input from the three-dimensional map projection unit 42 into the xy coordinate system, and displays it on the display unit 5. It is displayed (S12).

  When the above processing is completed, the processing / control unit 4 returns the processing to step S1 and waits for input of operation information.

Although the said embodiment showed the example which uses a three-dimensional map as a three-dimensional model, this invention displays not only a three-dimensional map but various three-dimensional models, such as the three-dimensional model expressing the inside of a building, the three-dimensional model expressing a person. The present invention can be similarly applied to a three-dimensional model display device.

DESCRIPTION OF SYMBOLS 1 ... 3D map display apparatus 2 ... Operation part 3 ... Memory | storage part 30 ... 3D map memory | storage means 31 ... Virtual camera memory | storage means 32 ... Display area memory | storage means 33 ... Instruction position Storage means 34 ... Solid mark storage means 4 ... Processing / control unit 40 ... Instructed position setting means 41 ... Solid mark combining means 42 ... Solid map projection means 43 ... Display control means 5 ... Display section

Claims (4)

A three-dimensional model storage means for storing a three-dimensional model represented by arrangement data of a plurality of constituent surfaces constituting a predetermined object;
An instruction position setting means for setting an instruction position on the component surface of the three-dimensional model according to a user's instruction operation;
Solid mark storage means for storing a solid mark represented by predetermined solid shape data and a reference point set inside the solid mark;
A solid mark combining means for aligning the reference point with the indicated position and combining the solid mark with the solid model;
Virtual camera information storage means for storing camera parameters of a virtual camera that virtually captures the stereoscopic model;
3D model projecting means for projecting the 3D model obtained by combining the 3D mark by the 3D mark synthesizing unit on a photographing surface of the virtual camera according to the camera parameters, and generating a projection image;
Display control means for displaying the projection image on a predetermined display means;
A three-dimensional model display device comprising:
The solid mark storage means further stores a reference size and a size lower limit value of the solid mark,
The three-dimensional mark combining means calculates the projection size by projecting the three-dimensional mark of the reference size obtained by aligning the reference point to the designated position on the photographing surface according to the camera parameter, and the projection size is the size lower limit. If the value is less than the value, the solid mark is enlarged to be larger than the reference size and is combined with the solid model.
The three-dimensional model display device according to claim 1.
Display area information storage means for storing a display area size of an area for displaying the projection image on the display means;
The solid mark combining means corrects the size lower limit value according to the relationship between the size of the photographing surface and the display area size, and determines the solid mark as the reference when the projection size is less than the corrected size lower limit value. Synthesizes the 3D model by enlarging it larger than the size,
The three-dimensional model display device according to claim 2.
The solid model display device according to claim 1, wherein the solid mark is a sphere, and the reference point is a center of gravity of the solid mark.

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