TW201537144A - Image display system - Google Patents

Abstract

The present invention is to mitigate the process load of display image when attaching multiple textures on polygon of three-dimensional map, etc. The means to solve the problem is to arrange the multiple textures of three-dimensional polygons that will attach to target object to represent buildings, etc. in a non-overlapping manner to form integrated texture. When displaying the target projection, read the integrated texture, specify part of the corresponding polygon and attach the specified part. It is not to generate new texture, but to directly use the integrated texture as well as to designate the part to be attached. Therefore, only integrated texture is to be read but not multiple textures, thereby decreasing the load of reading and processing as well as the process load of displaying.

Description

Image display system

The present invention relates to an image display system that performs image display by attaching a plurality of types of materials to a plurality of polygons.

An electronic map used for a route guidance system or a computer screen, etc., is a three-dimensional map that displays a feature such as a building in a three-dimensional state. The three-dimensional map is displayed by three-dimensional rendering of a three-dimensional model by means of perspective projection or the like, and in order to improve the fidelity thereof, as disclosed in Patent Document 1, a texture is attached to each polygon constituting a three-dimensional model (texture) ).

Fig. 1 is an explanatory view showing a material application example of the prior art. An example of a set of use cases for a 3 dimensional model of a building is shown. A material A indicating the appearance of the roof is attached to the building. Similarly, material B and material C are attached to the front and side of the building. In this example, the material B and the material C which are unit images are repeatedly arranged and attached to the front and the side.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Laid-Open Patent Publication No. 2012-183100

The use of materials is indispensable for improving the fidelity of 3-dimensional maps. However, a considerable computational load is required to attach the material. As the number of materials increases, the calculation is negative The load has become big and cannot be ignored.

This problem is not only seen in the case of displaying a three-dimensional map, but also in the case of displaying an image using a material.

In view of the above problems, the present invention has an object of reducing the processing load for image display using materials.

The present invention relates to an image display system that is an image display system that displays a plurality of types of materials and displays images in a plurality of polygons, and has a material data storage unit that displays the plurality of types of materials in mutual memory. An integrated material data of an image that is disposed at an arbitrary position without overlapping; an input unit that reads attribute information of which of the plurality of types of the plurality of types of polygons to which the polygon is attached; and a display control unit according to the foregoing The attribute information is obtained by attaching the material to the polygon and displaying the image, wherein the display control unit reads the integrated material data from the material data storage unit and stores the data in the storage unit, and stores the information based on the attribute information. The above-mentioned attachment is performed using the data in the specified range of the material of the specified type of material in the range of the memory portion of the specified type of material.

Usually, the display of the material is based on the instructions of the drawing, and after reading the material data, it repeats each material using a series of processing systems depicted by it. Therefore, when a plurality of materials are used for image display, as the material type increases, it is necessary to repeat the series of processes for each material, and the command is issued, and the image data of the material prepared in advance in the material data storage unit is used. Increasing the number of reads will increase the processing time. On the other hand, in the present invention, since an integrated material in which materials used for image display are arranged is used, Therefore, the image data corresponding to a plurality of materials can be uniformly read from the material data storage unit at a time, and can be used for drawing, so that the number of times of instruction is issued and the number of readings can be reduced, and the processing time can be shortened.

In particular, the present invention is highly useful in an image display system having a circuit for interpreting instructions for displaying an image and a circuit for performing display processing in parallel. For example, it is a system including a CPU (Central Processing Unit) and a GPU (Graphics Processing Unit). The system causes the GPU to start rendering by issuing instructions to the GPC by the CPU. However, if there are more instructions for drawing the display, the GPU waits for the instruction from the CPU to be issued, which wastes time and makes the entire processing time longer. . On the other hand, in the present invention, since the number of instructions for drawing display can be reduced, it is possible to suppress the occurrence of wasteful time and perform processing, and the processing time can be shortened.

Moreover, in general, in the image display system using materials, the upper limit of the number of materials for drawing can be managed at one time. If you want to draw with a material that exceeds the upper limit, it will be necessary to update the managed material at a certain point in time, which is a waste of time. On the other hand, according to the present invention, the total number of materials can be reduced by using the integrated material. Therefore, it is possible to avoid the number of materials exceeding the manageable upper limit and avoid wasting time for updating the material.

Further, the present invention can be utilized in a specific integrated material corresponding to the range of each material, and attached separately. Therefore, even if an integrated material is used, an image in which each material is used individually can be displayed.

The attribute information in the present invention specifies information on the range on the memory portion in which each material is stored. The specific information may be information directly specifying the memory area of the memory unit by using an address or the like, or may be indirectly specified information. As information indirectly designated, it is considered that there is, for example, coordinate information of each material range in the specified integrated material.

In the present invention, it is not necessary to make the materials included in the integrated material more The edge is in a one-to-one relationship. The material can be used as a plurality of polygons, and the composite material can be superimposed on a polygon and applied.

Moreover, it is not necessary to include all the materials used in one image in one integrated material, and it is also possible to display images using a plurality of integrated materials.

In the image display system of the present invention, the plurality of types of materials are each formed in a rectangular shape, and the display control unit may specify the range in which the material is stored based on the opposite vertex coordinates of the rectangular shape.

In this way, by making the material a rectangular shape, it is easy to arrange the materials in the integrated material, and it is easy to manage. In this aspect, the opposite vertex coordinates of the rectangular shape correspond to the attribute information indirectly specifying the range on the memory portion in which the material is stored.

According to the graphic database of the processing material, all the materials are represented by the inherent coordinate system of the material of value 0~1. In this case, the integrated material can also be divided into square regions, and individual materials are allocated in each square region. If so, there is an advantage in that it is easier to arrange and manage the materials.

Further, in the image display system of the present invention, the material data storage unit stores the association information of the vertex coordinates for each of the plurality of types of materials, and the display control unit refers to the related information to perform the specific range of the range. .

In this manner, according to the attribute information, when specifying which material is attached to the polygon, by referring to the related material corresponding to the material, the range of the conforming material can be specified, and the material of the material can be read. That is to say, the state of each material in the integrated material is specified through the related information. If the range is specified via the related data, the range can be easily managed when the material is used for the plurality of polygons. For example, even if the position or size of the material is changed within the integrated material, as long as the related data is corrected, the application of the material of the plurality of polygons can be changed in batches.

In the image display system of the present invention, the foregoing attribute information further includes The style information of the style in which the materials are repeatedly arranged and attached is set, and the display controller arranges and attaches the materials based on the style information.

In this way, the pattern repeated as shown in the material B and the material C of FIG. 1 can be easily realized.

The present invention can be applied to display various images, for example, a three-dimensional model of the above-described polygonal structure, and the three-dimensional model is divided into a grid of a specific size set on the ground surface according to the position of the ground object. And managing, the integrated material data is formed by using a material for a polygon included in a 3-dimensional model in the grid for each of the meshes, and the display control unit is based on a feature corresponding to the polygon. The location, select the aforementioned integrated material, and carry out the aforementioned attachment.

By doing so, the present invention can be used for the display of a 3-dimensional map. In the three-dimensional map, there are a large number of three-dimensional models, and in order to improve the fidelity, a large number of materials are used, so the usefulness of the present invention is particularly high. By utilizing the present invention for the display of a 3-dimensional map, the processing load required for display can be greatly reduced.

Moreover, in the above manner, an integrated material is generated for each mesh of the management unit of the map data. In this way, it is possible to unify the unified material and the management unit of the three-dimensional model, and it is easy to use the advantages of the integrated material.

The image display system of the present invention may further include a polygon specifying unit that specifies a polygon used for image display, and an integrated material data generating unit that extracts from the material data storage unit and corresponds to the specific polygon. The material is such that the extracted materials are arranged in a non-overlapping manner to generate the integrated material data.

In this way, a unified material can be generated from the plural material. Integrated material It can be dynamically generated when the image is displayed, or it can be generated beforehand.

In this aspect, the integrated material data generating unit, the material data storage unit for displaying an image, the input unit, the display control unit, and the like may be configured as individual members. For example, the integrated material data generated in advance in the above-described manner can be provided to a terminal for image display including a material data storage unit, an input unit, and a display control unit via a communication or media, and the terminal is used in the terminal. Provides integrated material data for image display. In this case, the terminal can also be plural. According to this aspect, the generated integrated material data can be shared among a plurality of terminals, thereby improving convenience.

The arrangement of the materials when generating the integrated material can be determined by various methods. For example, when all the materials are represented by the relative relative coordinates of values 0 to 1, the integrated material is previously divided into square regions, and the materials are sequentially allocated in each region.

In the present invention, it is not necessary to have all of the above-described various features, and a part thereof may be omitted as appropriate, or may be combined.

In addition, the present invention can also be configured as an image display method for displaying an image by a computer, or can be configured as a computer program for executing the display by a computer. Moreover, the integrated material data generating device for generating integrated image data for image display may be configured by using an individual material database applied to each polygon, or may be configured as a method for generating integrated material data by a computer, or for This computer program. Furthermore, it may be configured as a recording medium readable by other computers such as a CD-R or a DVD on which the above computer program is recorded.

100‧‧‧Path guidance system

101‧‧‧Command Input Department

102‧‧‧GPS (Global Positioning Sensor)

103‧‧‧Path Exploration Department

110‧‧‧Map database

111‧‧‧Line database

112‧‧‧ Polygon Database

113‧‧‧Material Group Database

114‧‧‧Material Database

115‧‧‧Text database

116‧‧‧Network database

120‧‧‧Display Control Department

121‧‧‧Target Configuration Department

122‧‧‧Material Attachment

123‧‧‧Projection Department

124‧‧‧Text Display Department

200‧‧‧ integrated material data generation device

202‧‧‧Command Input Department

210‧‧‧ original map database

211‧‧‧ Polygon Database

212‧‧‧Individual material database

220‧‧‧ Integrated Material Generation Department

222‧‧‧Material Group Database Generation Department

224‧‧‧Poly Data Database Correction Department

226‧‧‧Information Management Department

228‧‧ Record media

Fig. 1 is an explanatory view showing a prior art material use case.

Fig. 2 is an explanatory view showing a use case of a material.

Fig. 3 is an explanatory view showing the configuration of a path guiding system.

Fig. 4 is an explanatory diagram showing the data structure of the map database.

Figure 5 is a flow chart of the map display process.

Figure 6 is a flow chart of the material attachment process.

Fig. 7 is an explanatory view showing the configuration of an integrated material data generating device.

Figure 8 is a flow chart of the system and material generation processing.

[Example 1]

An embodiment of the image display system of the present invention is described by taking a case of a path guidance system as an example. The route guidance system is a device that represents a 3-dimensional map and guides the route from the departure point to the destination designated by the user. The image display system can be assembled as part of implementing the function of displaying the 3-dimensional map.

A. Material application method:

In this embodiment, the material is attached to each polygon of the 3-dimensional model, and a three-dimensional map with high fidelity is displayed. Before using the configuration of the route guidance system, the method of using the material will be described.

Fig. 2 is an explanatory view showing a use case of a material. An example of attaching a material to a three-dimensional model of a building. On the top of the building, a part A of the material indicating the appearance of the roof is attached, and the material B portion and the material C portion of the display window are attached to the front and the side.

In the present embodiment, as shown in the lower right of the figure, an integrated material in which the material A portion, the material B portion, and the material C portion are arranged is prepared. Next, for the above, only the material A portion of the integrated material is used as the attachment object. For the front side and the side surface, only the material B part and the material C part in the integrated material are reused as attachment objects. That is, in the present embodiment, by using the integrated material including the respective material portions separately, the same appearance as when the materials A to C are individually used is realized.

When preparing materials A to C as individual material data, it is necessary to read the material data from non-volatile memory such as hard disk when attaching. On the other hand, in the present embodiment, since the integrated material is read once in advance, the material can be processed. The quality of the A~C part is attached, so the processing load of the reading can be reduced in the attachment process of the material. In the three-dimensional map, since most of the three-dimensional models use a large number of materials, the effect of reducing the display processing load on the entire reading processing load is greatly reduced.

B. System composition:

Fig. 3 is an explanatory view showing the configuration of a path guiding system. The route guidance system 100 of the embodiment shows an example of a configuration of a satellite navigation device. The route guidance system 100 can also be configured to utilize other portable terminals such as smart phones and notebook computers. Further, although the route guidance system 100 of the embodiment is shown as being operated by independent operation, it may be configured to connect the server and the terminal device by a network.

The route guidance system 100 is configured to include a CPU, a GPU, a RAM, a ROM, a hard disk, and the like inside, and includes each of the functional blocks shown. Each function block is constituted by a hardware body provided by the path guiding system 100 such as a hard disk or a sensor, and a software body capable of realizing each function. The functional blocks can also be constructed by hardware such as electronic circuits.

The route guidance system 100 is a map database 110 used for storing path search or map display in a hard disk. In the map database 100, each of the illustrated databases is included. The line database 111 stores a three-dimensional model representing the shape of a linear object such as a road or a route in a three-dimensional map. The polygon database 112 stores a three-dimensional model representing a three-dimensional shape of a three-dimensional object such as a building.

The material group database 113 is a memory that relates the polygons of the 3-dimensional model to the materials to which they are applied. The material database 114 stores image data attached to the materials of the respective polygons. The memory group is the integrated material described in FIG. 2. The material group database 113 specifies which part of the integrated material is used for each polygon by specifying the coordinates of the integrated material. The structure of the material group database 113 and the material database 114 will be specifically described later.

The text database 115 stores the text data displayed in the 3-dimensional map. The network database 116 stores data representing roads formed by links and nodes as path search data.

The map database 110 is managed in mesh units in this embodiment. That is, the ground surface is divided into a grid of a rectangular shape of a specific size, and a region is distinguished for each grid, and line data, polygon data, text data, and the like corresponding to the features in the region are stored. Similarly, the material database 114 also generates and integrates the materials that are applied to the polygons in each of the grids in a grid unit. In this way, when the map is displayed, the material can be processed in the grid unit of the material, and the management and utilization of the data can be facilitated.

The command input unit 101 inputs an instruction designated by the user. Examples of the command include, for example, a departure point of the route search, a designation of the destination, a mode designation of the map display, and the like.

The GPS 102 detects the current position of the route guidance system 100 using a GPS (Global Positioning Sensor).

The route search unit 103 uses the network database 116 to search for a route from the designated departure place to the destination. Path exploration can apply various methods such as Dijkstra's algorithm.

The display control unit 120 displays a 3-dimensional map. First, the target object arrangement unit 121 arranges the three-dimensional model stored in the line database 111 and the polygon database 112 in the virtual three-dimensional space. Next, the material stored in the material database 114 is applied to each polygon by the material attaching portion 122. The application system is as shown in FIG. 2, and the integrated material is read from the material database 114, and a part of each polygon is attached. The projection unit 123 projects the object to which the material is attached by perspective projection from the specified viewpoint position and line of sight direction to generate a projection image for display. The character display unit 124 superimposes and displays the character on the generated projection image.

The part of the route guidance system 100 that is related to the display of the 3-dimensional map The map database 110 and the display control unit 120 are configured to correspond to the image display system of the present invention.

Fig. 4 is an explanatory diagram showing the data structure of the map database. The structure of the polygon database 112, the material group database 113, and the material database 114 is exemplified.

The polygon database 112 stores a three-dimensional model of a building or the like. "ID" is the identification information of each polygon constituting each of the three dimensional models. The "shape" is a three-dimensional coordinate that stores polygon vertices AP1, AP2, etc., which constitute a three-dimensional model. "Material" specifies the identification information of the material attached to each polygon. In the present embodiment, instead of directly specifying the material, it is set as the material in the specified material group database 113. The attribute stores various information related to the polygon. For example, information about the name, type, height, color, etc. of a building.

The image data of the integrated material is stored in the material database 114. In the integrated material, identification information such as TID1 and TID2 is added. As shown in the figure, the integrated material is arranged with a plurality of materials such as material part A, part B, and part C. In the example of the figure, an example in which three materials are arranged is displayed, but the number, shape, and size of the materials included in the integrated material can be arbitrarily set within a range in which the materials do not overlap each other.

In the present embodiment, the map database 110 is prepared in units of grids on a certain range of cut points. Therefore, the integrated material is also generated in units of grids, including the shape of the material used for the polygons in the grid. When the same material is used for objects that exist in different meshes, the material is repeatedly included in the integrated material corresponding to each mesh. Although such a repetitive part is produced, by integrating the material in a grid unit, when the map is displayed, the object and the material can be processed in a grid unit, and the management and utilization of the data are easy.

However, it is not necessary to generate a unified material in grid units. There are various other options for the unit to prepare the integrated material.

The material group database 113 stores the polygon database 112 and the material data. Library 114 establishes related information for the association. "GID" is the identification information of related information. The polygon data is associated with the related data by specifying the GID in the polygon database 112. In the example of the figure, the data of PID1 and PID2 stored in the polygon database 112 all store GID1 in the "material", so the polygons are simultaneously associated with the related data of GID1 of the material group database 113. By doing so, it is easy to associate the plural material data with the polygon.

The "TID" of the material group database 113 is the identification information of the material database 114. By specifying the TID, the material group database 113 can be associated with the material database 114. In the example of the figure, the "TID1" is stored as the "TID" in the related information with the GID1. Therefore, the related information is associated with the material data TID1 in the material database 114.

The Pmin and Pmax of the material group database 113 are the coordinate data of the material range that should be attached to the polygon in the specified integrated material. Pmin represents the lower left vertex coordinates of the material range, and Pmax represents the top right vertex coordinates. In the example of the figure, P1 and P2 are designated as Pmin and Pmax, respectively. When P1 and P2 are set to the positions indicated by the coordinate system in the material TID1, the two points are designated as the specified material A portion as the range to be attached. Similarly, when specifying the material B part, just specify the lower left vertex as Pmin, and specify the upper right fixed point as Pmax.

The "polygon" of the material group database 113 can specify the information of the polygon data by referring to the polygon database 112 from the material group database 113. In the example of the figure, since the PID1 and PID2 of the polygon database 112 are associated with the GID1 of the material group database, the oppositely corresponding PID1 and PID2 are stored in the "polygon".

With the above data structure, the polygon data in the polygon database 112 can be associated with the range in the integrated material in the material database 114 via the material group database 113. In this embodiment, since the correspondence is indirectly established through the material group database 113, when the integrated material of the material database 114 is updated, if the material is modified The mass group database 113 has the advantage that the batch can be easily changed to correspond to a plurality of polygons.

When the polygon is associated with the material, the material group database 113 may be omitted, and the identification information TID1, TID2, etc. of the material database 114 and the vertex coordinates Pmin, Pmax, etc. may be directly stored in the polygons of the polygon database 112. method.

C. Map display processing:

Figure 5 is a flow chart of the map display process. The processing performed when the 3-dimensional map is displayed during the process of guiding the path to the user. This processing is mainly performed by the display control unit 120 shown in FIG. 3, and is processed by the CPU and the GPU of the path guiding system 100.

When the processing is started, the route guidance system 100 sets the viewpoint, the line of sight direction, the display range, and the like (step S10). These parameters may be set based on the current location of the route guidance system 100, the route being explored, and the like. Moreover, it can also be set by the user's instruction.

The route guidance system 100 reads the map data in the set display range (step S12), and arranges the three-dimensional model in the virtual three-dimensional space (step S14). Next, the material attaching process is performed on the polygon (step S16). This processing is shown in FIG. 2, which is a process of applying one of the integrated materials to the polygons. The details of the processing will be described later.

When the attachment of the material is completed, the route guidance system 100 performs perspective projection from the specified viewpoint and line of sight direction (step S18), and generates a projection map. It is also possible to use a projection method such as parallel projection instead of perspective projection. Next, the route guidance system 100 displays characters in the projection map (step S20), and ends the map display processing.

The map display processing described above is performed in the route guidance, and is repeatedly executed while changing the viewpoint, the line of sight direction, and the like before reaching the destination.

Figure 6 is a flow chart of the material attachment process. It corresponds to the processing of step S16 in the map display (Fig. 5).

The route guidance system 100 first reads the integrated material data corresponding to the map display range (step S30). Since the integrated material data is generated in grid units, it is sufficient to read an integrated material data when the display range converges in a single grid. In the case where the display range spans a complex grid, the complex material data of the plural is read.

Next, the route guidance system 100 sets the material portion (step S32). It is a process that is specific to the portion of the integrated material that is applied to the polygon to be processed. It is not the image processing of the material part or the like that is cut out from the integrated material, but only the processing of the range is specified.

In this embodiment, the material portion to be attached is specified by the coordinate values of the u and v coordinates set by the integrated material with the coordinate values of the lower left top Pmin (Umin, Vmin) and the upper right vertex Pmax (Umax, Vmax). . The coordinate value can be obtained by referring to the material group database 113.

Next, the route guidance system 100 attaches a material to the corresponding polygon (step S34). The figure shows an example of the attached material. As shown in the figure, the attachment is performed only in the rectangular range specified by the vertices Pmin and Pmax in the integrated material. It is not the case that the image processing of the range is cut out from the integrated material, but when the integrated material is attached, only the range is used as the application target. In the example of the figure, the examples in which the polygons 1 and 2 of the buildings 1 and 2 are attached are exemplified, but the same range can be applied to the plural polygons of a plurality of buildings. Moreover, the configuration can be arbitrarily set according to the shape of the polygon or the like.

The route guidance system 100 is repeatedly executed before the above processing is completed for all the materials (step S36).

For the attachment of the above materials, a little more detailed explanation. The pattern library used in the 3-dimensional pattern is defined by a square shape formed by normalizing the material image by a value of 0 to 1, and its four vertices (0, 0), (0, 1) (1, 0) and (1, 1) mostly specify the state in which the material is attached by specifying which point corresponds to the polygon. In this embodiment, the range specified by the vertices Pmin and Pmax is the base of the integrated material at the specified point. Since the standard system is defined, it is impossible to directly form the above-described normalized square shape in this state. Therefore, in the attaching process of step S34, in order to make the four vertices (0, 0), (0, 1), (1, 0), (1, 1) correspond to the vertices of the specified range, The coordinate transformation of the following formula: umod=Umin+(u-Umin)/(Umax-Umin); vmod=Vmin+(v-Vmin)/(Vmax-Vmin); here, u and v are the times when the material is attached The four vertices (0,0), (0,1), (1,0), (1,1) of the normalized square and its internal coordinate system, that is, the range specified by the vertices Pmin, Pmax The coordinate value of the relative coordinate system inside, umod, vmod is converted into the value of the coordinates of the integrated material. By performing the coordinate transformation, in the graph library, four vertices (0, 0), (0, 1), (1, 0) are defined in the range specified by the vertices Pmin and Pmax in the integrated material. The normalized square shape represented by (1, 1) is processed, and other areas are treated as areas that are not effective in the material attachment process, so that the result can be attached only by using one of the integrated materials.

According to the path guiding system 100 of the embodiment described above and the image display system assembled therein, the integrated material can be used for map display. Therefore, when the map is displayed, if the integrated material is read, the material can be attached without reading a large number of materials. Therefore, according to the embodiment, the processing load required for material reading and the processing load of the map display can be alleviated.

In particular, in the present embodiment, it is assumed to have a hardware configuration of a CPU and a GPU. In the hardware of this configuration, the processing of reading and drawing of the material is performed in accordance with the instruction GPU for drawing from the CPU. In this embodiment, since the integrated material is used, the processing of the material can be performed by the GPU, and the GPU can perform the attaching process by appropriately using the necessary parts of the GPU. Therefore, according to the embodiment, the number of times the instruction is issued can be reduced, and the processing time can be reduced.

Moreover, the number of materials that the GPU can generally manage has an upper limit. In this embodiment, Since the integrated material is used, the total number of materials can be reduced within the range not exceeding the upper limit. Therefore, according to the present embodiment, it is possible to efficiently draw using a plurality of materials.

[Embodiment 2]

Next, a route guidance system as a second embodiment will be described. The route guidance system of the second embodiment is provided with an integrated material data generation device 200 that automatically generates an integrated material. The configuration of the three-dimensional map and the contents of the map display processing using the integrated material are the same as in the first embodiment. In the first embodiment, the integrated material is also generated by manual operation by an operator or the like. However, in the second embodiment, the integrated material is automatically generated, which is different.

D. System configuration of the second embodiment:

Fig. 7 is an explanatory view showing the configuration of the integrated material data generating device. The integrated material data generating device 200 is constituted by a computer program in which a computer PC can be installed to realize each function of the figure. It is not only a device that operates independently, but also a network connection server and a computer. Moreover, each of the functional blocks in the figure may be formed of a hard body in addition to a soft body.

The original map database 210 is used in the generation of integrated material data. The polygon database 211 stores polygon data constituting a 3-dimensional model of a building or the like for displaying a 3-dimensional map. The content is the same as the polygon database 112 (refer to FIG. 3) explained in the first embodiment. The individual material database 212 stores a database of image data attached to the material of each polygon. The integrated material data is generated by arranging the materials stored in the individual material database 212.

The command input unit 202 inputs various commands from the operator. As an example of the command, for example, a mesh or the like which is a processing target for generating integrated material data is specified.

The integrated material generation unit 220 arranges the material materials stored in the individual material database 212 to generate an integrated material.

The material group database generating unit 222 generates the integrated material and the polygon. Related information of Guanlian (see Figure 4).

The polygon database correction unit 224 corrects the polygon data based on the generated related data. That is, for the polygon data before the correction, the part of the manner in which the material data stored in the individual material database 212 is attached is specified, and the correction content becomes a method of specifying the related data corresponding to the material data. By doing so, as shown in FIG. 4 previously, the polygon can be made to correspond to the material via the material group database 113.

The data management unit 226 stores the integrated materials and related materials generated as above in the map database 110. The generated map database 110 sends a message to the user via the network NE or the recording medium 228.

As described above, in the second embodiment, the configuration example in which the integrated material data generating device 200 and the device for displaying the map are respectively configured is displayed, and an example in which the entire system functions as the route guidance system is displayed. Each function of the integrated material data generating device 200 may be configured as a system that is integrated into the route guiding system 100 shown in the first embodiment.

E. Integrated material generation processing:

Figure 8 is a flow chart of the system and material generation processing. The processing executed by the integrated material generation unit 220, the material group database generation unit 222, and the polygon database correction unit 224 of the system material data generation device 200 is executed by the CPU of the integrated material data generation device 200. deal with.

The integrated material data generating device 200 first selects an object mesh to be processed (step S40). As explained, the integrated material is generated in grid units. The object mesh can also be set to the operator's designation, or it can be automatically selected from unprocessed meshes.

The integrated material data generating device 200 specifies a polygon in the target mesh, and reads an individual material corresponding thereto (step S42). Since the projection map is not generated, it is not necessary to read the polygon itself.

Next, the integrated material data generating device 200 arranges individual materials The column generates a unified material (step S44). The arrangement method is schematically shown in the figure. The materials A to C shown on the left are individual materials. Arrange them in the integrated material as shown in the figure. The arrangement method can be any position as long as the individual materials do not overlap each other.

In the case where the individual materials A to C are defined by squares formed by the normalized coordinate systems (0, 0) to (1, 1), the integrated material may be pre-cut into square areas of a certain size. And the method of assigning individual materials A~C to each area in order.

The individual materials A to C do not have to be square, and can be set to any shape. By doing so, it is possible to prevent the resolution of each material from being lowered and to generate a unified material. However, for the convenience of arrangement, the individual materials A~C are preferably set in advance as a rectangle.

When the generation of the integrated material is completed, the integrated material data generating device 200 generates a material group database based on the relationship between the polygon and the individual material (step S46). As shown in FIG. 4, as long as the coordinates of the vertices Pmin and Pmax of the individual materials corresponding to the polygons are specified and stored, the related information can be generated.

After the related data is generated as described above, the integrated material data generating device 200 associates the material group database with the polygon database (step S48). That is, as shown in FIG. 4, the information of the specified related information can be stored as the material of the attached material in the specified polygon database.

When the above processing is completed, the integrated material data generating device 200 stores the respective data banks (step S50), and ends the integrated material generation processing.

According to the second embodiment, since the integrated material can be automatically generated, the processing at the time of displaying the map can be reduced, and the load for the previous processing can be reduced.

The above has been described based on the embodiments of the present invention. It is not necessary to have all of the various features described in the examples, and it is possible to omit a part and combine them as appropriate.

In the embodiment, an example of a system for displaying a 3-dimensional map is displayed, but the present invention can be utilized not only for displaying a 3-dimensional map but also for utilizing a plural material. Various systems for displaying images.

Further, in the embodiment, the configuration of the CPU and the GPU is exemplified, but the present invention is also applicable to a configuration including only the CPU.

[Industrial availability]

The present invention can be utilized for image display by attaching a plurality of types of materials to a plurality of polygons.

Claims (8)

An image display system is an image display system that displays a plurality of types of materials and displays images of a plurality of types of polygons, and includes a material data storage unit that memorizes that the plurality of types of materials are arranged so as not to overlap each other. An integrated material data of an image at an arbitrary position; an input unit that reads attribute information of which of the plurality of types of the plurality of types of the polygons and the polygons are attached; and a display control unit that performs the foregoing according to the attribute information And displaying the image by attaching the material to the polygon, wherein the display control unit reads the integrated material data from the material data storage unit, stores the integrated material data, and stores the data in the memory unit, and specifies the specified type based on the attribute information. For the range on the memory portion of the material, the above-mentioned attachment is performed using the information in the specific range of the above-mentioned integrated material data. An image display system according to claim 1, wherein the plurality of types of materials are each formed in a rectangular shape, and the display control unit specifies a range in which the material is stored by using a vertex coordinates of the opposite sides of the rectangular shape. The image display system according to claim 1 or 2, wherein the material data storage unit stores the associated data of the vertex coordinates for each of the plurality of types of materials, and the display control unit refers to the related data to specify the range. The image display system according to any one of claims 1 to 3, wherein the attribute information further includes style information specifying a style in which the materials are repeatedly arranged and attached. The display control unit arranges and attaches the material based on the style information. The image display system according to any one of claims 1 to 4, wherein the polygon forms a 3D model of the feature, and the 3D model is divided into a mesh of a specific size set on the ground surface according to the position of the feature. For the management of the grid, the integrated material data is formed by using a material for the polygon included in the 3-dimensional model in the grid for each of the grids, and the display control unit is based on the feature corresponding to the polygon. The location, select the aforementioned integrated material, and carry out the aforementioned attachment. The image display system according to any one of claims 1 to 5, further comprising a polygon specifying unit that specifies a polygon used for image display, and an integrated material data generating unit that extracts from the material data storage unit The material corresponding to the specified polygon is such that the extracted materials are arranged in a non-overlapping manner to generate the integrated material data. An image display method is an image display method in which a plurality of types of materials are attached to a plurality of polygons to perform image display, wherein the plurality of types of materials are disposed at arbitrary positions without overlapping each other as a memory display. The integrated material data of the image is performed by the computer in the material data storage unit, and has the following steps: (a) reading the polygon and specifying the attribute information of which of the plurality of types of the plurality of polygons are attached to each polygon. (b) a step of attaching the material to the polygon and displaying an image according to the attribute information; and the step (b) reads the integrated material data from the material data storage unit and stores the data in the memory unit. Based on the attribute information, the range on the memory portion in which the material of the specified type is stored is specified, and the attachment is performed using the data in the specific range of the integrated material data. A computer program for displaying a plurality of types of materials on a plurality of polygons for image display, wherein the memory displays the images of the plurality of types of materials arranged at arbitrary positions without overlapping each other. The integrated material data is implemented in the computer of the material data storage unit to perform the following functions: reading the polygon and specifying the attribute information of which of the above-mentioned plural types of the respective polygons, and attaching the aforementioned polygon according to the above attribute information Providing the display function of the image and displaying the image; as the display function, the following function is realized: the integrated material data is read from the material data storage unit and stored in the memory unit, and the storage is specified based on the attribute information. The above-mentioned attachment is performed using the data in the specific range of the material of the specified material in the range of the memory portion of the specified type of material.