KR101286653B1 - Apparatus and method for processing complex material appearance information - Google Patents

Abstract

The present invention relates to a texture information processing device, the texture information processing device according to an aspect of the present invention is a texture information input unit for receiving the texture information of each layer of the object (Multi-layered material), the texture of each layer It includes a texture information processing unit for processing information and a rendering unit for performing rendering by using the results of the texture information processing unit.

Description

Complex texture information processing device and method {APPARATUS AND METHOD FOR PROCESSING COMPLEX MATERIAL APPEARANCE INFORMATION}

The present invention relates to a texture information processing apparatus and method, and more particularly, to a texture information processing apparatus and method for processing and visualizing texture information of each layer.

The present invention is derived from a study conducted as part of the IT growth engine technology development project of the Ministry of Culture, Sports and Tourism. [Task Management Number: 2006-S-045-04, Assignment Name: Development of a Function-Extended Ultra-Speed Renderer]

Recent advances in three-dimensional computer graphics technology have enabled image synthesis to be close to or at the same level as photographed images. In particular, such image generation has been used in the field of visual effects and the design visualization of the field of mobile devices and home appliances, fashion, automobiles, and architecture using a variety of new materials, and real-time synthesis. However, to produce such images still requires very long computational time and designer work. Therefore, a lot of research and technology development has been made to solve this problem.

Among many factors that determine the realism of Computer Generated Imagery (CGI), texture is important. In particular, there are many considerations for expressing complex textures such as body parts such as skin and hair, delicate fabrics, and mixed paints.

Various techniques have been developed to represent this information. For example, the surface of a real object may be photographed to obtain texture characteristics as raw data. Alternatively, a physical model and an empirical model may be established and expressed as a mathematical expression. By the way, raw data accurately expresses the characteristics of texture, but its size is so large that it is difficult to use in a network render farm environment using hundreds to thousands of CPUs. Equation-based model alone has a limitation in expressing delicate texture characteristics and has a disadvantage in that the amount of calculation increases.

It is also important to edit existing texture information and modify it or to create new texture information. In particular, even if the texture is measured, it is necessary to use only as a reference material, and various experiments are required to improve it. This requires an editing system that supports mixing of textures. In particular, it is important to visualize the multi-layer material in the manufacturing process of the product.

Detailed texture information is often large data or large calculations. Therefore, there should be a method that can use precise texture information in a large area that is easy to see and use simplified texture information in a small area that is hard to see. To this end, it is necessary to support texture information in a multi-resolution method.

On the other hand, the conventional texture information processing apparatus and method can only process a certain surface material. Therefore, it is difficult to process the texture information of the object of the multi-layered material effectively with the conventional texture information processing apparatus and method. In addition, the conventional texture information processing apparatus and method cannot control the speed and accuracy of rendering in processing and visualizing texture information of an object of a multi-layered material.

The present invention is to achieve the object of processing and visualize the texture information of the object of the multi-layer material through the texture information processing apparatus and method, the problem to be solved by the present invention is to provide a texture information processing device.

Another object of the present invention is to provide a method for processing texture information.

The objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned can be clearly understood by those skilled in the art from the following description.

A texture information processing apparatus according to an aspect of the present invention for achieving the above object, the texture information input unit for receiving the texture information of each layer of the object (Multi-layered material), the texture information of each layer processing And a rendering unit that renders using the texture information processing unit and the texture information processing unit.

According to another aspect of the present invention, a texture information processing apparatus includes a texture information input unit configured to receive texture information of each layer of an object of a multi-layered material, and process texture information of each layer, and include a non-spline volume (B). and a rendering unit that performs rendering by using a result of the texture information processing unit and the texture information processing unit converting the data into a spline volume) format.

The texture information processing method may be configured to perform rendering by receiving texture information of each layer of an object of a multi-layered material, processing texture information of each layer, and processing the result. Steps.

The details of other embodiments are included in the detailed description and drawings.

According to the present invention, the texture information processing apparatus according to an embodiment of the present invention can process and visualize texture information of an object of a multilayer material. In addition, the texture information processing apparatus according to an embodiment of the present invention may control the speed and accuracy of rendering in processing and visualizing texture information of an object of a multi-layered material.

1 is a block diagram illustrating a texture information processing apparatus according to an embodiment of the present invention.
2 is a block diagram illustrating a texture information processing apparatus according to another embodiment of the present invention.
3 is a block diagram illustrating an embodiment of a texture information processing unit in the texture information processing apparatus according to embodiments of the present invention.
4 is an exemplary view showing an embodiment of a level considering a path of ray tracing in the apparatus and method for processing texture information according to embodiments of the present invention.
5 is an exemplary view showing another embodiment of the level considering the path of ray tracing in the apparatus and method for processing texture information according to embodiments of the present invention.
6 is an exemplary view showing another embodiment of a level considering a path of ray tracing in the apparatus and method for processing texture information according to embodiments of the present invention.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are to make the disclosure of the present invention complete, and those skilled in the art to which the present invention pertains. It is provided to fully inform the scope of the invention, and the invention is defined only by the scope of the claims. It is to be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. In the present specification, the singular form includes plural forms unless otherwise specified in the specification. As used herein, “comprises” and / or “comprising” refers to the presence of one or more other components, steps, operations and / or elements. Or does not exclude additions.

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

Embodiments of the present invention represent a case in which the texture information of a specific material (eg, gold, plastic, etc.) is given in the form of a bi-directional reflectance distribution function (BRDF).

The bidirectional reflectance distribution function is the ratio of the amount of reflected light to the amount of light incident on a particular material. The texture of a particular material is determined by how much the incident light is reflected in what direction. Thus, the bidirectional reflectance distribution function is a very important factor in determining texture. In addition, important factors are the amount of incident light, the amount of reflected light, the frequency and direction of incident or reflected light.

와 점에서 눈 또는 카메라까지의 반사되는 빛의 단위벡터

이다. The basic bidirectional reflectance distribution function is defined as two vectors for a point. That is, the unit vector of incident light from the point to the light source

Units of reflected light from and points to the eye or camera

to be.

는 극좌표계에서 2개의 변수로 표기된다. (

) 극좌표계에서 극점(zenith)로부터 측정한 역고도(inverse altitude)는

로, 방위각 (azimuth)은

로 표기한다. 역고도의 범위는 0도 에서 90도이고, 방위각의 범위는 0도에서 360도이다. 따라서, 기본 양방향 반사율 분포 함수의 정의역(domain)은 4개의 변수 (

)에 대해 정의되는 4차원 함수이다.Unit vector of space

Is represented by two variables in the polar coordinate system. (

) The inverse altitude measured from the zenith in the polar coordinate system is

With azimuth

. The reverse altitude ranges from 0 degrees to 90 degrees and the azimuth ranges from 0 degrees to 360 degrees. Thus, the domain of the basic bidirectional reflectance distribution function is defined by four variables (

Is a four-dimensional function defined for.

The extended bidirectional reflectance distribution function may be defined as the order of each layer, thickness, temperature and frequency of incident light or frequency of reflected light, in addition to the two vectors. Thus, the extended bidirectional reflectance distribution function is a function of five dimensions or more.

The texture information used in the embodiments of the present invention is not affected by the dimension of the domain of the BRDF function. That is, there is an advantage that can be extended for arbitrary dimensions. This is possible because it supports high-dimensional non-spline volumes.

In general, non-splines are used to represent curves or surfaces in the field of computer graphics or CAD. In the case of showing a curve, the case of showing a one-dimensional surface and a curved surface can be seen in two dimensions. This corresponds to the minimum number of arguments required to represent the curve, surface, or dimension of the domain. In embodiments of the present invention, the existing non-splines may be extended to be used in three or more orders. This is called bispline volume.

A texture information processing apparatus according to an embodiment of the present invention will be described with reference to FIG. 1. 1 is a block diagram illustrating a texture information processing apparatus according to an embodiment of the present invention.

As shown in FIG. 1, the texture information processing apparatus 10 includes a texture information input unit 100, a texture information processing unit 200, and a rendering unit 300.

On the other hand, the texture information input unit 100 receives the texture information of each layer of the object (Multi-layered material) of a multi-layered material.

In addition, the texture information processing unit 200 processes the texture information of each layer.

In addition, the rendering unit 300 performs rendering using the result of the texture information processing unit 200.

Therefore, the texture information processing apparatus according to an embodiment of the present invention may process and visualize texture information of an object forming a multilayer material.

For example, a painted car is a layered structure with different materials. Raw materials such as iron plates are located on the bottom, and paint and coating materials are placed on them. In this case, the texture information processing apparatus according to an embodiment of the present invention receives the texture information of the raw material, paint, coating material from the texture information input unit 100, and the texture information of each layer in the texture information processing unit 200 To process. In addition, the rendering unit 300 performs the rendering using the result. Therefore, the texture information processing apparatus according to an embodiment of the present invention may process and visualize texture information of an object forming a multilayer material.

On the other hand, the properties of each layer material to determine the texture may be at least one of the bidirectional reflectance distribution function (BRDF), refractive index, absorption coefficient, reflection coefficient, thickness, order of each layer, surface roughness and color.

Meanwhile, the properties of each layer material may be input by a user's input. In addition, the properties of each layer material may be measured and input using a device such as a camera or a spectrometer for a specific texture. In addition, the properties of each layer material may be previously input values previously output from the mathematical model and the physical model. In addition, the properties of each layer material may be input values output from the tabular, non-spline, empirical, mathematical and physical models. In addition, the property of each layer material may be a value output from the result of mixing two or more texture. In addition, the properties of each layer material may be converted into a bidirectional reflectance distribution function and input.

In addition, the texture information input unit 100 receives at least one of the measured texture information, the mathematical texture model information, and the texture information of the texture network, and processes the texture information of each layer by using each information, and in a non-spline volume format. It may be to convert.

Meanwhile, the texture information input unit 100 receives at least two or more texture information, and the texture information processing unit 200 interpolates two or more texture information and generates intermediate texture information to process the texture information of each layer. It may be.

For example, the texture of gold and silver is mixed to generate intermediate texture information of two textures.

In this case, if two or more texture information textures are the same (for example, a Lafortune model), the texture information may be processed by interpolating only parameters of the corresponding texture format.

Meanwhile, the texture type may be a tabular method in which the measurement material information is included in a table in the form of raw raw data. In addition, the texture type may be a non-spline method. Or, it may be an empirical model such as Phong, Blinn, Ward, Lafortune model. It may also be a mathematical model such as Cook-Torrance, Oren-Nayar and physical model approach.

In addition, the argument of the texture type may be changed by a user input.

On the other hand, in order to generate and process a variety of texture information, the texture form of each texture information need not be the same.

In addition, when rendering in the rendering unit 300, the texture information processing unit 200 may convert the result of the mixed texture information to a certain texture format for the efficiency of calculation.

For example, when the texture information processor 200 generates intermediate texture information by interpolating texture information of a physical model and texture information of a non-spline method, the texture information may be converted into a non-spline method, and converted. The renderer 300 may perform rendering by using the texture information.

In addition, the texture information input unit 100 receives at least two or more texture information, and the texture information processing unit 200 separates the two or more texture information for each layer by the angle of incidence or reflection angle of light to each layer texture information. It may be to process.

For example, when the incident angle is 45 degrees or more, it may be processed to show the texture of gold, and when the incident angle is 45 degrees or less, it may be processed to show the texture of plastic.

The texture information processing unit 200 may process at least one of a bidirectional reflectance distribution function of each layer, a thickness of each layer, a refractive index of each layer, an absorption coefficient of each layer, and a reflection coefficient of each layer.

In addition, the texture information processing unit 200 includes the order of each layer, the roughness of each layer surface, the color of each layer, the amount of light incident on each layer, the amount of light reflected from each layer, the temperature of each layer, It may be to process at least one of the frequency of the light and the frequency of the reflected light.

In addition, the texture information processor 200 may process the texture information of each layer and convert the texture information into a non-spline volume format.

In addition, the texture information processor 200 may find a value of the bidirectional reflectance distribution function by evaluating the non-splines with respect to the texture information of the non-spline volume type. Meanwhile, the texture information processing unit 200 may include computer software, a GPU, dedicated hardware, and the like for the development of non-splines.

In this case, the information converted into the non-spline volume format may include a bidirectional reflectance distribution function of each layer. In addition, the information converted to the non-spline volume format includes the thickness of each layer, the refractive index of each layer, the absorption coefficient of each layer, the reflection coefficient of each layer, the order of each layer, the roughness of each layer surface, the color of each layer, It may include at least one of the amount of light incident on each layer, the amount of light reflected from each layer, the temperature of each layer, the frequency of the incident light and the frequency of the reflected light.

Meanwhile, the rendering unit 300 may perform rendering by controlling the speed and accuracy of the rendering according to the level of considering the path of ray tracing for tracking the path of light incidence or reflection of light from each layer material. .

Referring to FIG. 4, an embodiment of a level considering a path of ray tracing of the rendering unit 300 according to embodiments of the present disclosure will be described. 4 is an exemplary view showing an embodiment of a level considering a path of ray tracing in the apparatus and method for processing texture information according to embodiments of the present invention.

The renderer 300 may perform rendering by calculating a possible refraction direction of the incident light from the fixed point of the reflected light.

Referring to FIG. 4, the upper figure shows a path of refraction of incident and reflected light. Also, in the figure below, the incident light for the direction of light reflected through one fixed point indicates that there may be more than one direction of light refracted through the upper and lower reflection points.

Referring to the lower figure of FIG. 4, the direction of reflected light is shown in one quadrant, and the direction of incident light is shown in two quadrants. In addition, the incident light is refracted and reflected at the lower reflection point is shown in three quadrants.

At this time, the direction of incident light refracted in the direction of the reflected light is refracted from the fixed point through the lower reflection point. Therefore, the renderer 300 may perform rendering by calculating a possible refraction direction of the incident light from the fixed point of the incident light.

That is, when the direction of the reflected light toward the camera or the eye is determined, the renderer 300 may perform rendering by calculating the direction of the incident light that refracts the light in this direction.

Referring to FIG. 5, another embodiment of the level considering the path of ray tracing of the rendering unit 300 according to embodiments of the present invention will be described. 5 is an exemplary view showing another embodiment of the level considering the path of ray tracing in the apparatus and method for processing texture information according to embodiments of the present invention.

The renderer 300 may perform rendering by calculating a possible refraction direction of the incident light from a region where the direction of incident light is fixed. In this case, the refractive index at the upper reflection point of the object of the multilayer material and the normal direction of the reflected light are fixed, and the one having the same lower reflection point for each light path is used. In addition, the renderer 300 calculates a possible refraction direction of light and performs rendering. On the other hand, by using the material of the upper layer and the lower layer forming a statistical normal direction, the rendering unit 300 may be to calculate the possible refraction direction of the incident light, and perform rendering.

Referring to FIG. 5, the left figure shows a path of refraction of incident and reflected light. Also, in the right figure, the direction of reflected light is shown in one quadrant, and the direction of incident light is shown in two quadrants. In addition, the incident light is refracted and reflected at the lower reflection point is shown in three quadrants.

At this time, the direction of incident light refracted in the direction of the reflected light is refracted to have the same lower reflection point from the fixed region. Therefore, the rendering unit 300 may perform rendering by calculating a possible refraction direction of the incident light from the region where the direction of incident light is fixed.

Referring to FIG. 6, another embodiment of the level considering the path of ray tracing of the rendering unit 300 according to embodiments of the present invention will be described. 6 is an exemplary view showing another embodiment of a level considering a path of ray tracing in the apparatus and method for processing texture information according to embodiments of the present invention.

In addition, as another embodiment of the level considering the path of the ray tracing of the rendering unit 300 according to the embodiments of the present invention, the rendering unit 300 freely without fixing the direction of the incident light The rendering may be performed by calculating a changeable case. In this case, however, the lower reflection point is set to be fixed. In this case, in rendering, the rendering unit 300 may consider a possible refraction direction for light incident from a wider area.

Referring to FIG. 6, the left figure shows a path of refraction of incident and reflected light. Also, in the right figure, the direction of reflected light is shown in the first quadrant, and the direction of the incident light is shown in the first and second quadrants. In addition, the incident light is refracted and reflected at the lower reflection point is shown in three quadrants.

At this time, the rendering unit 300 calculates a case where the light can be freely changed without fixing the direction of the incident light refracted in the direction of the reflected light. Accordingly, the renderer 300 considers the possible refraction direction for the incident light refracted to have the same lower reflection point from the wider area. The renderer 300 may perform rendering by calculating a case in which the light is freely changed without fixing the direction of incident light.

In addition, as another embodiment of the level considering the path of the ray tracing of the renderer 300 according to embodiments of the present invention, the renderer 300 is fixed to the lower reflection point and the direction of the incident light. It may be to perform the rendering by calculating a case that can be freely changed without doing. In this case, the rendering unit 300 may perform rendering with high accuracy.

On the other hand, in all the cases described above, calculating the possible refraction direction of the incident light is to perform the Monte Carlo integration by sampling the direction component (eg: bidirectional reflectance distribution function) of the incident light to the renderer 300 It may be.

In addition, the rendering unit 300 may perform Importance Sampling, in which a relatively large amount of sampling is performed in a region where the importance or value of the texture information is large for calculation efficiency. For example, in the case of texture, the rendering unit 300 may sample a lot in a region having a large value of the bidirectional reflectance distribution function.

In addition, sampling can be performed independently for each color element and a predetermined frequency region of a color model (eg, an RGB color model).

In addition, when the direction of the reflected light toward the camera or the eye is determined, the renderer 300 mainly performs ray tracing by sampling the direction of the incident light that refracts a lot of light in this direction, and performs rendering. It may be.

On the other hand, when the rendering unit 300 does not have a simple form, such as a bidirectional reflectance distribution function, the rendering unit 300 may use a conversion technique using a Marginal density function.

In the embodiments of the present invention, the rendering unit 300 calculates the Marginal density function for the inverted altitude value and the azimuth value with respect to the bidirectional reflectance distribution function of the material representing the specific texture, and stores it in a data structure such as a hash table. You can search in the inverse form. In this case, a cosine value for the inverse altitude value may be applied as a weight due to the nature of the rendering formula. In addition, the inverse function value can be easily found with respect to the input of the one-dimensional random number generator, and the result can be utilized by the rendering unit 300 to perform sampling.

Meanwhile, while the rendering unit 300 performs rendering, the rendering unit 300 may convert the sampled data into any one of raw data, non-spline volume format, empirical model, mathematical model, and physical model.

Meanwhile, in rendering the rendering unit 300, Cosine Weighted Uniform Hemisphere Sampling may be used.

 Also, the rendering unit 300 converts only the knot vector and the control point into a hash table or the like through a non-spline volume, thereby efficiently rendering the inverse function search speed.

In addition, the renderer 300 may calculate the Marginal density function directly by mathematically integrating the non-spline volume. In this case, the integral of the basis function can be used for mathematical integration.

In addition, the rendering unit 300 may perform rendering in consideration of the order of the material of each layer and the properties of the material of each layer. As described above, in the case of tracking the direction of light incidence or reflection, the rendering unit 300 performs rendering in consideration of the order of materials of each layer by dividing the order of materials of each layer into an upper layer or a lower layer. It may be.

On the other hand, it is relative to divide the order of the material of each layer into an upper layer or a lower layer. For example, when there are objects forming a multilayered material in order of materials of glass, paint, and plastic, the glass material corresponds to the upper layer in relation to the paint material, and the paint material corresponds to the lower layer. In addition, the paint material corresponds to the upper layer part in relation to the plastic material, and the plastic material corresponds to the lower layer part.

In addition, the rendering unit 300 may perform rendering in consideration of at least one of a bidirectional reflectance distribution function (BRDF), a refractive index, an absorption coefficient, and a reflection coefficient in consideration of properties of materials of each layer.

On the other hand, the order of the material of each layer processed and the properties of the material of each processed layer may be changed by the user's input, in this case, the renderer 300 renders using the result changed by the user's input It may be to perform.

Meanwhile, the rendering unit 300 may perform rendering by using a non-spline volume bidirectional reflectance distribution function.

Meanwhile, the renderer 300 may process the texture by using the given scene information and perform rendering. At this time, the scene information includes all elements other than the texture information. For example, the shape, lighting, camera, texture, etc. of the material. In this case, the scene information may be in the form of a bidirectional reflectance distribution function. In addition, the scene information may be provided using a shader network.

A texture information processing apparatus according to another embodiment of the present invention will be described with reference to FIG. 2. 2 is a block diagram illustrating a texture information processing apparatus according to another embodiment of the present invention.

Here, the same reference numerals are used for components that perform the same functions as the components illustrated in FIG. 1, and a detailed description of the corresponding components will be omitted.

As shown in FIG. 2, the texture information processing apparatus 20 includes a texture information input unit 100, a texture information processing unit 200, a multi-resolution calculation unit 400, and a rendering unit 300.

On the other hand, the texture information input unit 100 receives the texture information of each layer of the object of the multi-layer material.

In addition, the texture information processing unit 200 processes the texture information of each layer.

In addition, the multi-resolution calculation unit 400 adjusts the number of control points of the bi-directional reflectance distribution function according to the level of the multi-resolution desired by the user to reflect the non-spline volume (B-spline volume) bi-directional reflectance from the result of the texture information processing unit 200. Generate a distribution function.

In addition, the rendering unit 300 performs rendering using the result of the texture information processing unit 200. Meanwhile, the rendering unit 300 may perform rendering by using a non-spline volume bidirectional reflectance distribution function.

Therefore, the texture information processing apparatus according to another embodiment of the present invention may process and visualize texture information of an object forming a multilayer material. In addition, the texture information processing apparatus according to another embodiment of the present invention may process and visualize texture information at a more efficient and faster speed by using a non-spline volume and a non-spline volume bidirectional reflectance distribution function.

Meanwhile, the multi-resolution calculation unit 400 may receive at least one of the number of control points, the step of the multi-resolution, the maximum value and the minimum value from the user in order to adjust the number of control points of the bidirectional reflectance distribution function. In this case, the multi-resolution calculation unit adjusts the number of control points using the value input from the user and generates a non-spline volume bidirectional reflectance distribution function. For example, if the number of control points is 4 and the multi-resolution step is input in 4 steps, the number of control points is (20,80,20,80), (15,60,15,60), (10,40). It is possible to generate a non-spline volume bidirectional reflectance distribution function, changing to four, (10, 40), (5, 20, 4, 20).

Therefore, the texture information processing apparatus according to another embodiment of the present invention may process the texture information of the object of the multi-layered material and visualize it at multiple resolutions. Therefore, the texture information processing apparatus according to another embodiment of the present invention can process and visualize the texture information at a more efficient and faster speed.

An embodiment of a texture information processing unit in a texture information processing apparatus according to embodiments of the present invention will be described with reference to FIG. 3. 3 is a block diagram illustrating an embodiment of a texture information processing unit in the texture information processing apparatus according to embodiments of the present invention.

In all the above cases, one embodiment of the texture information processing unit 200 of the texture information processing apparatus according to the embodiments of the present invention is a material information manager 201, a material information editor 202, a material information visualizer ( 203), raw texture data store (204-1), composite material data store (204-2), physical material data store (204-3), material model fitter for tabular form (205-1), for BVB Material Model Fitter (205-2), Material Model Fitter for Experience Models (205-3), Material Model Fitter for Physical Models (205-4), Material Model Fitter for Multilayer Models (205-5) ), A non-spline volume raw texture data preprocessor 206, a virtual material measurer 207, and a physical material measurer 208.

The texture information manager 201 manages the texture information by receiving the texture information from the texture information editor 202, the texture information visualizer 203, the texture data storage 204, and the texture model customizer 205. The texture information is provided to the editor 202 and the material information visualizer 203.

The texture information editor 202 may receive texture information from the texture information manager 201 and process the texture information.

Meanwhile, the texture information editor 202 may process the texture information by interpolating two or more texture information and generating intermediate texture information.

In addition, the texture information editor 202 may be to process the texture information by separating two or more texture information by the angle of incidence or reflection angle of the light for each layer.

In addition, the texture information editor 202 includes the order of each layer, the roughness of each layer surface, the color of each layer, the amount of light incident on each layer, the amount of light reflected from each layer, the temperature of each layer, the incident It may be to process at least one of the frequency of the light to be reflected and the frequency of the reflected light.

The texture information visualizer 203 may receive the texture information from the texture information manager 201 and visualize the texture information to the user.

Meanwhile, the texture information visualizer 203 may visualize the texture model on a lobe or an acquisition plane on a spherical coordinate system. The overall shape can be expressed in three dimensions, and two-dimensional cross section representation is convenient for feature editing. The texture information visualizer 203 may be used for checking measurement and fitting information and editing material information.

Raw texture data store 204-1 stores raw raw texture data. The raw texture data may include a value of a bidirectional reflectance distribution function. In addition, the raw texture data may include a value of a color model (eg, an RGB color model).

The composite texture data storage 204-2 obtains texture data from texture information processed in the texture information editor 202, and stores the texture data as composite texture data.

The physical texture data storage 204-3 obtains and stores the physical material data from the information about the material.

The texture model fitter 205-1 for tabular format receives raw material data from the raw material data preprocessor 206, converts texture information into a tabular format, and provides the texture information to the texture information manager 201. do.

Meanwhile, the texture model fitter 205-1 for the tabular form may receive raw material data from the raw material data storage 204-1.

In addition, the texture model fitter 205-1 for the tabular form may be input of the composite material data from the composite material data storage 204-2.

The texture model fitter 205-2 for BVB receives raw material data from the raw material data preprocessor 206, converts the texture information into a BV-B-Spline Volume BRDF format, and converts the texture information into the texture information. Provided to the manager 201.

Meanwhile, the texture model fitter 205-2 for BVB may receive raw material data from the raw material data storage 204-1.

In addition, the texture model fitter 205-2 for BVB may receive composite material data from the composite material data store 204-2.

The texture model customizer 205-3 for the experience model receives the raw material data from the raw material data preprocessor 206, converts the texture information into the empirical model, and provides the texture information to the texture information manager 201. do.

Meanwhile, the texture model customizer 205-3 for the experience model may receive raw material data from the raw material data storage 204-1.

In addition, the texture model customizer 205-3 for the experience model may be input of composite material data from the composite material data store 204-2.

The texture model customizer 205-4 for the physical model receives raw material data from the raw material data preprocessor 206, converts texture information into a mathematical model and a physical model, and converts the texture information into a texture information manager 201. To provide.

In addition, the texture model fitter 205-4 for the physical model may receive raw material data from the raw material data storage 204-1.

In addition, the texture model fitter 205-4 for the physical model may be input of composite material data from the composite material data storage 204-2.

The texture model customizer 205-5 for the multilayer model receives the raw material data from the raw material data preprocessor 206, converts the texture information into the multilayer model, and provides the texture information to the texture information manager 201. do.

In addition, the texture model fitter 205-5 for the multi-layer model may receive raw material data from the raw material data storage 204-1.

In addition, the texture model fitter 205-5 for the multi-layer model may receive composite material data from the composite material data store 204-2.

The raw texture data preprocessor 206 converts the bidirectional reflectance distribution function and measurement data provided from the virtual texture meter 207 and the physical texture meter 208 into raw material data form.

The virtual texture meter 207 calculates a virtual bidirectional reflectance distribution function from a value specified by a user, a value output from an existing mathematical / physical model, a mixed composite material model, and measures a virtual texture.

The physical texture meter 208 finds a bidirectional reflectance distribution function using a camera or a spectrometer for a specific material, and measures the physical texture.

On the other hand, in all the above-described case, the texture information processing apparatus is the information input through the texture information input unit 100, the texture information of each layer processed by the texture information processing unit 200 and input and output information of the rendering unit 300 Can be provided to the user. In this case, texture information may be displayed through a separate display unit (not shown) or a display device.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. For example, the texture information processing apparatus presented in the present invention may be implemented in various forms such as a texture information processing method by varying the category of the invention. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is shown by the following claims rather than the detailed description, and all changes or modifications derived from the claims and their equivalents should be construed as being included in the scope of the present invention.

Claims (20)

A material information input unit configured to receive material information of each layer of the multi-layered material;
A material information processor configured to process material information of each layer; And
A rendering unit that performs rendering using the result of the material information processing unit
Including;
The material information processing unit
The order of each layer, the roughness of the surface of each layer, the color of each layer, the amount of light incident on each layer, the amount of light reflected from each layer, the temperature of each layer, of the incident light Processing at least one of a frequency and a frequency of the reflected light
Material information processing device.
The method of claim 1,
The renderer
According to the level considering the path of ray tracing to track the incident or reflected path of light from each layer material
Performing rendering by controlling the speed and accuracy of the rendering
Material information processing device.
The method of claim 1,
The renderer
Rendering in consideration of the order of materials of each layer and the properties of the materials of each layer
Material information processing device.
The method of claim 3, wherein
The renderer
In considering the properties of the material of each layer,
Performing rendering in consideration of at least one of a bidirectional reflectance distribution function (BRDF), a refractive index, an absorption coefficient, and a reflection coefficient;
Material information processing device.
The method of claim 3, wherein
If the material information of each layer is the order of the material of each layer and the property of the material of each layer,
The material information processing unit
Processing the order of the material of each layer and the properties of the material of each layer,
The order of the materials of the processed layers and the nature of the materials of the processed layers
Can be changed by user input,
The renderer
When the order of the materials of the processed layers and the properties of the materials of the processed layers are changed, rendering is performed using the result changed by the user input.
Material information processing device.
The method of claim 1,
The material information processing unit
Processing at least one of a bidirectional reflectance distribution function of each layer, a thickness of each layer, a refractive index of each layer, an absorption coefficient of each layer, and a reflection coefficient of each layer
Material information processing device.
delete The method of claim 1,
The material information input unit
Receive material information on at least two materials,
The material information processing unit
Interpolating material information of two or more materials and generating intermediate material information to process material information of each layer.
Material information processing device.
The method of claim 1,
The material information input unit
Receive material information on at least two materials,
The material information processing unit
Processing material information of each layer so that different textures corresponding to the two or more materials appear according to an incident angle or a reflection angle of light to each layer.
Material information processing device.
A material information input unit configured to receive material information of each layer of the multi-layered material;
A material information processing unit for processing the material information of each layer and converting the material information into a non-spline volume format; And
A rendering unit that performs rendering using the result of the material information processing unit
Including;
The material information input unit
Receive at least one of measurement texture information, mathematical texture model information, and texture information of the texture network;
Processing the material information of each layer using the respective information and converting it into a non-spline volume format
Material information processing device.
11. The method of claim 10,
And a multi-resolution calculator configured to generate a non-spline volume bi-directional reflectance distribution function using the result of the material information processor.
The multi-resolution calculation unit
The non-spline volume bidirectional reflectance distribution function is generated from the result of the material information processor by adjusting the number of control points of the bidirectional reflectance distribution function according to the level of multi-resolution desired by the user.
The renderer
Performing rendering using the non-spline volume bidirectional reflectance distribution function
Material information processing device. delete The method of claim 11,
The renderer
Performing rendering in consideration of the order of materials of each layer and the properties of each layer material
Material information processing device.
The method of claim 13,
If the material information of each layer is that the material of each layer is in order and the property of the material of each layer,
The material information processing unit
Processing the order of the material of each layer and the properties of the material of each layer,
The order of the materials of the processed layers and the nature of the materials of the processed layers
Can be changed by user input,
The renderer
When the order of the materials of the processed layers and the properties of the materials of the processed layers are changed, rendering is performed using the result changed by the user input.
Material information processing device.
delete Receiving material information of each layer of a multi-layered material;
Processing the material information of each layer; And
Performing rendering by using the result of the processing step
Including;
The processing step
The order of each layer, the roughness of the surface of each layer, the color of each layer, the amount of light incident on each layer, the amount of light reflected from each layer, the temperature of each layer, of the incident light Processing at least one of a frequency and a frequency of the reflected light;
Material information processing method that includes.
17. The method of claim 16,
Converting to a non-spline volume format using the results of the processing step
Material information processing method further comprising.
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