KR101375649B1 - Apparatus and method for generating texture for three dimensional mesh model of target object - Google Patents

Abstract

The present invention relates to a texture generating apparatus and method for generating a high-quality texture to be mapped to a three-dimensional mesh model representing a three-dimensional shape of a target object based on a plurality of color images of the target object photographed from various angles. According to the present invention, it is possible to generate a high quality texture with less blurring in a relatively short time, to enhance the realism of the three-dimensional mesh model representing the three-dimensional shape of the target object, and to further improve the quality of the entire digital image including the target object. Can be improved.

Description

Apparatus and method for generating texture for three dimensional mesh model of target object}

The present invention relates to an apparatus and method for generating a texture of a three-dimensional mesh model of a target object, and to a three-dimensional mesh model representing a three-dimensional shape of a target object based on a plurality of color images of the target object photographed at various angles. The present invention relates to a texture generating apparatus and method for generating a high quality texture to be generated.

In the process of producing a high-quality digital image, it is important to perform texture mapping on the three-dimensional model in order to give a three-dimensional model representing the three-dimensional shape of the object in the digital image.

When creating a texture to be mapped (coated) to a three-dimensional model, when using an image captured by a camera, only a part of the color information of the target object is divided into each image according to the shooting angle. Therefore, in order to generate a texture to be applied to the entire 3D model, it is necessary to synthesize a plurality of color images photographed from various angles.

Conventionally, in order to generate a texture to be mapped to a three-dimensional model, a plurality of color images are weighted for each image to generate a texture through a weighted average, or triangulation of the mesh model through an optimization process. Techniques have been used to find a texture area that is mapped for each triangular face from multiple input color images, but the former has the advantage of creating a texture for a three-dimensional model in a short time. If the geometry is incorrect, textures are not clearly generated and blurring occurs. In the latter, the quality of the generated texture is good, but it takes a long time to generate the texture.

Therefore, there is a need for a texture generation technique capable of generating a high quality texture with less blurring in a relatively short time.

The technical problem to be achieved by the present invention is a three-dimensional mesh model that can generate a high-quality texture to be mapped to the three-dimensional mesh model of the target object based on a plurality of color images of the target object taken at various angles in a relatively short time To provide a texture generating apparatus and method of the present invention.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the particular embodiments that are described. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not restrictive of the invention, There will be.

In order to achieve the above technical problem, a texture generating apparatus of a three-dimensional mesh model according to the present invention includes a plurality of charts by unfolding a plurality of unit polygons belonging to a three-dimensional mesh model representing a three-dimensional shape of a target object in a two-dimensional space. A reference UV map generation unit for generating a reference UV map having a light emitting device; A color UV map generator for generating a plurality of color UV maps corresponding to the color images by mapping the color images photographed from the target object to the two-dimensional space of the reference UV map on a pixel-by-pixel basis; Select a keyframe corresponding to each chart of the reference UV map among the plurality of color UV maps, and repeatedly perform a process of mapping a texture to the reference UV map based on the selected keyframe. A reference UV map texture mapping unit for mapping a texture to an area; And a 3D model texture generation unit generating a texture of the 3D mesh model based on the reference UV map in which the textures are mapped to all the regions.

More preferably, the chart of the reference UV map may be a partial region cut and separated according to the curvature of the 3D mesh model.

More preferably, the color UV map generator generates a color based on the coordinate transformation relationship between the three-dimensional coordinates of the three-dimensional mesh model and the two-dimensional coordinates of the two-dimensional reference UV map and the coordinate transformation relationship between the three-dimensional mesh model and the plurality of color images. UV maps can be generated.

More preferably, the reference UV map texture mapping unit may select, for each chart of the reference UV map, a color UV map having a maximum area of the overlapping area with each chart as a keyframe corresponding to each chart.

More preferably, the reference UV map texture mapping unit may synthesize the first mapped texture and the second texture that is mapped before the first texture is mapped and adjacent to the first texture.

In order to achieve the above technical problem, the texture generation method of the three-dimensional mesh model according to the present invention comprises a three-dimensional mesh model composed of a plurality of unit polygons in three-dimensional space representing a three-dimensional shape of a target object. Receiving step; Generating a reference UV map composed of a plurality of charts by converting the unit polygons of the three-dimensional mesh model into a plurality of charts in a two-dimensional space; Receiving color images obtained by photographing a target object at a plurality of photographing angles, respectively; Generating a plurality of color UV maps corresponding to the plurality of color images by mapping pixels of the color images to a two-dimensional space of the reference UV map, respectively; Select a keyframe from among a plurality of color UV maps corresponding to an area where no texture is mapped in the chart belonging to the reference UV map, and select a keyframe corresponding to the keyframe in the chart belonging to the reference UV map based on the selected keyframe. A reference UV map texture mapping step of mapping a texture; Repeating the reference UV map text mapping step until a texture is mapped to all areas of the charts belonging to the reference UV map; And generating a texture of the 3D mesh model based on the reference UV map in which the textures are mapped to all the regions.

More preferably, the chart of the reference UV map may be a subregion cut and separated according to the curvature of the 3D mesh model.

More preferably, the step of generating the color UV map is based on the coordinate transformation relationship between the three-dimensional coordinates of the three-dimensional mesh model and the two-dimensional coordinates of the two-dimensional reference UV map and the coordinate transformation relationship between the three-dimensional mesh model and the plurality of color images. Color UV maps can be generated.

More preferably, the reference UV map texture mapping step may select, for each chart of the reference UV map, a color UV map having a maximum area of the overlapping area with each chart as a keyframe corresponding to each chart.

More preferably, the reference UV map texture mapping step may synthesize the currently mapped first texture and the second texture that is mapped before the first texture is mapped to a location adjacent to the first texture.

In order to achieve the above technical problem, according to the present invention, a computer-readable recording medium containing a program including a function of generating a texture of a three-dimensional mesh model, the function of receiving a three-dimensional mesh model; Converting the unit polygons of the three-dimensional mesh model into a plurality of charts in a two-dimensional space to generate a reference UV map composed of the plurality of charts; A function of receiving color images of photographing a target object at a plurality of photographing angles; Mapping pixels of the color images to a two-dimensional space of the reference UV map to generate a plurality of color UV maps respectively corresponding to the plurality of color images; Select a keyframe corresponding to each chart of the reference UV map among the plurality of color UV maps, and repeatedly perform a process of mapping a texture to the reference UV map based on the selected keyframe. Mapping a texture to an area; And a function of generating a texture of a 3D mesh model based on a reference UV map in which textures are mapped to all regions.

According to the present invention, it is possible to generate a high quality texture with less blurring in a relatively short time. Through this, the realism of the three-dimensional mesh model representing the three-dimensional shape of the target object may be improved, and the quality of the entire digital image including the target object may be improved.

1 is a diagram showing the configuration of a texture generating apparatus of a three-dimensional model according to an embodiment of the present invention.
2 is a diagram illustrating a flow of a texture generating method of a 3D model according to an exemplary embodiment of the present invention.
3 is a diagram illustrating a reference UV map and a color UV map generated according to an exemplary embodiment of the present invention.
4 is a diagram illustrating a process of selecting a keyframe for each chart of a reference UV map according to an exemplary embodiment of the present invention.
5 is a diagram illustrating a process of mapping a texture to an area of a reference UV map corresponding to a keyframe according to an embodiment of the present invention.
6 illustrates results of repeating a keyframe based texture mapping process according to an exemplary embodiment of the present invention.
7 is a diagram illustrating a result of generating a texture of a 3D model according to an exemplary embodiment of the present invention.

The following merely illustrates the principles of the invention. Thus, those skilled in the art will be able to devise various apparatuses which, although not explicitly described or shown herein, embody the principles of the invention and are included in the concept and scope of the invention. Furthermore, all of the conditional terms and embodiments listed herein are, in principle, intended only for the purpose of enabling understanding of the concepts of the present invention, and are not intended to be limiting in any way to the specifically listed embodiments and conditions . It is also to be understood that the detailed description, as well as the principles, aspects and embodiments of the invention, as well as specific embodiments thereof, are intended to cover structural and functional equivalents thereof. In addition, these equivalents should be understood to include not only equivalents now known, but also equivalents to be developed in the future, that is, all devices invented to perform the same function regardless of structure.

Thus, the functions of the various elements shown in the drawings, including the functional blocks shown in the figures or similar concepts, may be provided by use of dedicated hardware as well as hardware capable of executing software in connection with appropriate software. When provided by a processor, the functions may be provided by a single dedicated processor, a single shared processor, or a plurality of individual processors, some of which may be shared. Also, the use of terms such as processor, control, or similar concepts should not be construed as exclusive reference to hardware capable of executing software, but may include, without limitation, digital signal processor (DSP) hardware, (ROM), random access memory (RAM), and non-volatile memory. Other hardware may also be included.

The above objects, features and advantages will become more apparent from the following detailed description in conjunction with the accompanying drawings. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

On the other hand, when an element is referred to as "including " an element, it does not exclude other elements unless specifically stated to the contrary.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram showing the configuration of a texture generating apparatus of a three-dimensional model according to an embodiment of the present invention.

Referring to FIG. 1, the apparatus for generating a texture of a 3D model according to the present embodiment may include a reference UV map generator 110, a color UV map generator 120, a reference UV map texture mapping unit 130, and a 3D model. The texture generator 140 is included.

The reference UV map generation unit 110 generates a reference UV map having a plurality of charts by unfolding a plurality of unit polygons belonging to a three-dimensional mesh model representing a three-dimensional shape of a target object in a two-dimensional space.

The three-dimensional mesh model in this embodiment refers to a model that defines a three-dimensional shape of an object in three-dimensional space by connecting a plurality of unit polygons having three-dimensional coordinates. Generally, a triangle is mainly used as a unit polygon. This is only one embodiment, and the present invention is not limited thereto.

The reference UV map in the present embodiment refers to a UV map in which a 3D mesh model is unfolded in a 2D coordinate space using a surface parametrization technique. In the process of converting a 3D coordinate space model to a 2D coordinate space, Distortion occurs, and in order to reduce the distortion, the severely curved portion is cut according to the curvature of the 3D mesh model and separated into a plurality of charts (areas) and laid out in a two-dimensional coordinate space.

The color UV map generator 120 maps the color images of the target object, respectively, at a plurality of photographing angles, to the two-dimensional space of the reference UV map in units of pixels, thereby generating a plurality of color UV maps corresponding to the color images. Create

Coordinate transformation between the 3D coordinates of the 3D mesh model and the 2D coordinates of the 2D reference UV map in the process of converting the 3D mesh model to the 2D reference UV map in the reference UV map generation unit 110 according to the present embodiment. Information about the relationship is generated.

Also, in the case of a 3D mesh model, it is common to have information about a coordinate transformation relationship between an image photographed at various angles with respect to a target object and the 3D mesh model.

Therefore, the color UV map generator 120 obtains information on the coordinate transformation relationship from the reference UV map generator 110 or uses the information on the pre-stored coordinate transformation relationship to reference the pixels of the color images. Color UV maps corresponding to each of the color images may be generated by mapping to the same two-dimensional coordinate space as the two-dimensional space of the map.

The reference UV map texture mapping unit 130 maps the texture to the reference UV map generated by the reference UV map generation unit 110 based on the plurality of color UV maps generated by the true color UV map generation unit 120.

In more detail, the reference UV map texture mapping unit 130 selects a keyframe corresponding to each chart for each chart of the reference UV map among the plurality of color UV maps.

In this case, in order to more smoothly perform texture mapping for each chart, each chart may be numbered and divided using a connected components extraction technique.

The keyframes corresponding to each chart in the present embodiment indicate a color UV map that includes the most color information of the area belonging to the chart, and most simply, the area of the area where the chart and the color UV map overlap. By calculating, the color UV map with the largest area can be selected as the keyframe.

The reference UV map texture mapping unit 130 may repeatedly map a texture to a reference UV map based on keyframes corresponding to each chart to map textures to all areas of the charts belonging to the reference UV map. .

That is, the reference UV map texture mapping unit 130 maps a texture to an area in the chart (an area where the chart and keyframe overlap) corresponding to the key frame based on the selected key frame for each chart, and the key frame-based texture. By repeating the mapping process until the texture is mapped to all areas of the charts belonging to the reference UV map, the texture mapping of the reference UV map can be completed.

In this process, collisions may occur between textures mapped from different keyframes (color UV maps), such as boundary lines between mapped textures. Thus, in order to resolve such collisions, a process of synthesizing the textures to be naturally connected to each other is performed. As the algorithm for this, the Poisson image editing technique is representative as an automatic image editing technique, but this is only one embodiment, and the present invention is not limited thereto.

The 3D model texture generation unit 140 generates a texture of the 3D mesh model based on the reference UV maps in which textures are mapped to all regions through the reference UV map texture mapping unit 130.

2 is a view illustrating a flow of a texture generation method of a three-dimensional model according to an embodiment of the present invention, the texture generation method of the three-dimensional model according to the present embodiment is a texture of the three-dimensional model shown in FIG. It can be performed in the generating device. Therefore, the same matters as in the texture generating apparatus of the 3D model shown in FIG. 1 are referred to.

Referring to FIG. 2, first, a three-dimensional mesh model including a plurality of unit polygons in a three-dimensional space and representing a three-dimensional shape of a target object is received (S210).

The unit polygons of the 3D mesh model received in step S210 are converted into a plurality of charts in a 2D space to generate a reference UV map composed of a plurality of charts (S220).

Apart from the process of steps S210 to S220, a plurality of color images of photographing the target object at a plurality of photographing angles are received (S230).

In the present embodiment, for convenience of description, it is described in the order of (S210 ~ S220)-> (S230), but this is only one embodiment, the process of steps S210 to S220 and step S230 are in parallel with each other or It may be performed at the same time, or may be performed in reverse order, the present invention is not limited to the order of execution.

Pixels of the plurality of color images received in operation S230 are mapped to two-dimensional spaces of the reference UV map, respectively, to generate a plurality of color UV maps corresponding to the plurality of color images, in operation S240. In this case, the color UV maps generated in this step preferably correspond one-to-one to each of the color images input in step S230. Therefore, when the K color images are input in step S230, the color UV maps generated in step S240 are used. The number of maps is preferably K.

From among the plurality of color UV maps generated in step S240, a keyframe corresponding to an area in which the texture is not mapped (not filled) in the chart belonging to the reference UV map is selected (S250).

The texture is mapped to an area corresponding to the keyframe in the chart belonging to the reference UV map based on the keyframe selected in the step S250 (S260).

In this case, the color of the image according to the shooting position of the color image due to the auto exposure function of the camera that captured the color image on which the color UV map is generated based on each keyframe (color UV map) These can be recognized differently from each other. Therefore, when mapping textures using a plurality of color UV maps generated based on a plurality of color images taken from different photographing angles, it is unnatural to the portions where the mapped textures meet each other based on different color UV maps. A seam may occur. In addition, if the geometry of the three-dimensional model is inaccurate, mapping the texture of the reference UV map based on keyframes (color UV maps) can result in textures being mapped to the wrong location, resulting in inconsistency between the textures. Natural borders may occur. Therefore, it is necessary to synthesize both so that the seamless mapping between the newly mapped texture and the previously mapped textures is seamless.

Accordingly, in the present embodiment, in step S260, the newly mapped first texture and the second texture mapped before the first texture is mapped and mapped to a position adjacent to the first texture are synthesized so as not to generate a boundary line. (S270). As described above, the synthesis at step S270 is preferably performed using an automatic image editing technique such as a Poisson image technique.

For example, in the Poisson image editing technique, when a source image is attached to another target image, the source image and the target image are synthesized so that the boundary between the source image and the target image is naturally connected with the color of the target image. Generate a seamless cloning.

When you combine textures using Poisson image editing, spatial coordinates are required for the portions of the textures that follow. On the three-dimensional mesh model, the portions between the textures can be separated from each other. Considering the mapping relationship information used when the dimensional mesh model is converted to the 2D uv map, if the textures that are adjacent to or adjacent to each other on the 2D UV map are textures that can be adjacent to or adjacent to each other on the 3D mesh model, the Poisson image is edited. Can be synthesized using techniques.

The texture mapping operation of the reference UV map is completed by repeatedly performing the UV map texture mapping steps S250 to S270 until the textures are mapped to all regions of the charts belonging to the reference UV map (S280).

In step S280, the texture of the 3D mesh model is generated based on the reference UV map in which the textures are mapped to all regions (S290). In general, by converting a texture mapped to a 2D reference UV map into a form coated on a 3D mesh model, the texture of the 3D mesh model can be generated or mapped.

3 is a diagram illustrating a reference UV map and a color UV map generated according to an exemplary embodiment of the present invention.

Referring to FIG. 3, in the present exemplary embodiment, the reference UV map 302 cuts a severe portion of the triangular polygons of the three-dimensional coordinates constituting the three-dimensional mesh model 301 of the target object to generate a plurality of charts (areas). ), And convert them into two-dimensional coordinates to create an unfolded form in two-dimensional space. In this case, each chart of the reference UV map 302 is composed of a plurality of triangular polygons, and the vertices of each triangular polygon have two-dimensional coordinates.

In the present embodiment, the color UV maps 304 may be generated by mapping pixels of the plurality of color images 303 photographed from different angles of the object to a two-dimensional space of the reference UV map.

In the process of mapping the plurality of color images 303 to the two-dimensional space of the reference UV map in units of pixels, coordinate transformation information between the three-dimensional mesh model and the reference UV map or a three-dimensional mesh model and source when generating the three-dimensional mesh model Coordinate transformation information between images may be used.

4 is a diagram illustrating a process of selecting a keyframe for each chart of a reference UV map according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the reference UV maps 401 and 402 cut the severely curved portions in the process of unfolding polygons in a two-dimensional coordinate space, and refer to the separated parts (areas) as charts. A person skilled in the art can easily perform a conventionally known algorithm such as a technique, and the present invention is not limited to the chart separation algorithm.

Keyframes 403, 404, 405 corresponding to each chart separated in the reference UV map are selected and matched. As described above, the keyframe refers to a color UV map that includes the most color information of the area belonging to the chart. Preferably, the keyframe is calculated by calculating the area of the overlapping area between the chart and the color UV map. The largest color UV map can be selected as the keyframe.

5 is a diagram illustrating a process of mapping a texture to an area of a reference UV map corresponding to a keyframe according to an embodiment of the present invention.

Referring to FIG. 5, according to the present embodiment, a texture is primarily generated (mapping) on a reference UV map 501 generated from a three-dimensional mesh model based on keyframes corresponding to each chart of the reference UV map. One result 502 is illustrated. In this embodiment, even though the texture is primarily created (mapped), the texture is not yet coated, and thus the area 503 to undergo the texture mapping process for each chart in the secondary or tertiary manner. May be present.

6 illustrates results of repeating a keyframe based texture mapping process according to an exemplary embodiment of the present invention.

Referring to FIG. 6, when a chart-specific mapping process of mapping a texture using keyframes corresponding to each chart is performed once, the texture generation result and the non-textured region 601; In contrast with the result of repeating the chart-by-chart mapping process twice (602) and the result of repeating the chart-by-chart mapping process three times (603), as the number of iterations is increased, the texture mapping is not performed. The area of the reference UV map will be reduced. Therefore, it can be seen that high-quality texture mapping can be completed in the reference UV model when the matching of charts is repeated until the texture mapping is completed for all regions of the reference UV map.

7 is a diagram illustrating a result of generating a texture of a 3D model according to an exemplary embodiment of the present invention.

Referring to FIG. 7, when the 3D mesh model 701 and the plurality of color images 702 are input to the texture generating apparatus according to the present embodiment, a texture is generated based on the input data and applied to the 3D mesh model. This shows that the result 703 is output.

As such, when the texture of the 3D model is generated according to the present invention, it is possible to generate a high quality texture with less blurring in a relatively short time. Through this, the realism of the three-dimensional mesh model representing the three-dimensional shape of the target object may be improved, and the quality of the entire digital image including the target object may be improved.

In addition, the process of generating the texture of the three-dimensional model according to the present invention can also be embodied as computer-readable code on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like. In addition, the computer-readable recording medium may be distributed over network-connected computer systems so that computer readable codes can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the present invention can be easily inferred by programmers of the technical field to which the present invention belongs.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation, You will understand. Accordingly, the true scope of protection of the present invention should be determined only by the appended claims.

Claims (11)

A reference UV map generator for generating a reference UV map having a plurality of charts by unfolding a plurality of unit polygons belonging to a three-dimensional mesh model representing a three-dimensional shape of a target object in a two-dimensional space;
Generating color UV maps for generating a plurality of color UV maps respectively corresponding to the color images by mapping the color images photographed at the plurality of photographing angles to the two-dimensional space of the reference UV map. part;
From among the plurality of color UV maps, a keyframe corresponding to each of the charts of the reference UV map is selected, and a process of mapping a texture to the reference UV map based on the selected keyframe is repeatedly performed. A reference UV map texture mapping unit for mapping textures to all areas of the charts belonging to the reference UV map texture; And
And a three-dimensional model texture generation unit configured to generate a texture of the three-dimensional mesh model based on reference UV maps in which textures are mapped to all the regions. The method of claim 1,
And the chart of the reference UV map is a partial region cut and separated according to the curvature of the 3D mesh model. The method of claim 1,
The color UV map generation unit is based on a coordinate transformation relationship between the three-dimensional coordinates of the three-dimensional mesh model and the two-dimensional coordinates of the two-dimensional reference UV map and the coordinate transformation relationship between the three-dimensional mesh model and the plurality of color images. 3D mesh model texture generating device, characterized in that for generating a color UV map. The method of claim 1,
The reference UV map texture mapping unit selects, as a keyframe corresponding to each of the charts, a color UV map having a maximum area of the overlapping area of each chart for each chart of the reference UV map. Texture generator. The method of claim 1,
When the reference UV map texture mapping unit repeatedly performs a process of mapping a texture to the reference UV map based on the selected keyframe, the currently mapped first texture and the first texture are mapped before being mapped to the first texture. Repeating the synthesis of the first texture and the second texture so that the first texture and the second textures continue without boundary separation between the second textures adjacent to the first texture so that the textures are mapped to all regions of the charts belonging to the reference UV map. Texture generation apparatus for a three-dimensional mesh model, characterized in that. Receiving a three-dimensional mesh model composed of a plurality of unit polygons in a three-dimensional space and representing a three-dimensional shape of a target object;
Generating a reference UV map composed of the plurality of charts by converting the unit polygons of the three-dimensional mesh model into a plurality of charts in a two-dimensional space;
Receiving color images of photographing the object at a plurality of photographing angles;
Generating a plurality of color UV maps respectively corresponding to the plurality of color images by mapping pixels of the color images to a two-dimensional space of the reference UV map;
From among the plurality of color UV maps, select a keyframe corresponding to an area where a texture is not mapped in the chart belonging to the reference UV map, and select a keyframe in the chart belonging to the reference UV map based on the selected keyframe. A reference UV map texture mapping step of mapping a texture to a corresponding area;
Repeating the reference UV map text mapping step until a texture is mapped to all regions of the charts belonging to the reference UV map; And
And generating a texture of the 3D mesh model based on a reference UV map in which textures are mapped to all the regions. The method according to claim 6,
The chart of the reference UV map is a texture generation method of a three-dimensional mesh model, characterized in that the sub-area cut and separated according to the curvature of the three-dimensional mesh model. The method according to claim 6,
The generating of the color UV map may be performed based on a coordinate transformation relationship between the three-dimensional coordinates of the three-dimensional mesh model and the two-dimensional coordinates of the two-dimensional reference UV map and a coordinate transformation relationship between the three-dimensional mesh model and the plurality of color images. The texture generation method of the three-dimensional mesh model, characterized in that for generating the color UV map. The method according to claim 6,
The mapping of the reference UV map texture may include selecting, as a keyframe corresponding to each of the charts, a color UV map having a maximum area of the overlapping area of each chart for each chart of the reference UV map. How to create a texture for a model. The method according to claim 6,
When the reference UV map texture mapping step is repeatedly performed, no boundary is separated between the currently mapped first texture and the second textures that are mapped before the first texture is mapped and are adjacent to the first texture. Repeating the synthesis method of the first texture and the second texture so that the texture is mapped to all areas of the charts belonging to the reference UV map. In a computer-readable recording medium containing a program comprising a function of generating a texture of a three-dimensional mesh model representing a three-dimensional shape of a target object composed of a set of a plurality of unit polygons in a three-dimensional space,
Receiving the 3D mesh model;
Generating a reference UV map composed of the plurality of charts by converting the unit polygons of the 3D mesh model into a plurality of charts in a two-dimensional space;
A function of receiving color images of photographing the target object at a plurality of photographing angles;
Generating a plurality of color UV maps respectively corresponding to the plurality of color images by mapping pixels of the color images to a two-dimensional space of the reference UV map;
From among the plurality of color UV maps, a keyframe corresponding to each of the charts of the reference UV map is selected, and a process of mapping a texture to the reference UV map based on the selected keyframe is repeatedly performed. Mapping a texture to all regions of the charts belonging to the image; And
And a function of generating a texture of the three-dimensional mesh model based on a reference UV map in which textures are mapped to all the regions.

Images