CN109523619A - A method of 3D texturing is generated by the picture of multi-angle polishing - Google Patents
A method of 3D texturing is generated by the picture of multi-angle polishing Download PDFInfo
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- CN109523619A CN109523619A CN201811341422.XA CN201811341422A CN109523619A CN 109523619 A CN109523619 A CN 109523619A CN 201811341422 A CN201811341422 A CN 201811341422A CN 109523619 A CN109523619 A CN 109523619A
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- 238000000034 method Methods 0.000 title claims abstract description 109
- 238000005498 polishing Methods 0.000 title claims abstract description 37
- 238000006073 displacement reaction Methods 0.000 claims abstract description 15
- 238000007781 pre-processing Methods 0.000 claims abstract description 7
- 238000002845 discoloration Methods 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 238000009877 rendering Methods 0.000 abstract description 3
- 238000004088 simulation Methods 0.000 abstract description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000739 chaotic effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T15/00—3D [Three Dimensional] image rendering
- G06T15/04—Texture mapping
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T15/00—3D [Three Dimensional] image rendering
- G06T15/50—Lighting effects
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2210/00—Indexing scheme for image generation or computer graphics
- G06T2210/62—Semi-transparency
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- General Physics & Mathematics (AREA)
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Abstract
The invention discloses a kind of method that the picture by multi-angle polishing generates 3D texturing, Image Acquisition, image preprocessing, diffusing reflection textures are generated, normal map generates, Displacement generates, specular map generates, transparency textures generate, output result.Advantages of the present invention: the light diffusing reflection attribute for the material that comprehensive simulation material texture more accurately reacts the diffusing reflection phenomenon of light, the diffusing reflection textures of generation under different light angles；Three-dimensional normal data makes 3D real-time rendering effect truer compared to the bumps for the texture that the one-dimensional normal data that single picture obtains more accurately reacts；The interference that figure colour obtains the high light attribute of material in picture can be effectively removed by the specular map that normal map evolution comes, the specular map of generation is allowed more accurately to react the light-reflecting property of material；By bottom polishing, the picture of acquisition has really reacted the translucency of material, to keep the transparency textures generated more accurate.
Description
Technical field
The present invention relates to a kind of generation method of 3D texturing, in particular to a kind of picture by multi-angle polishing is raw
At the method for 3D texturing, belong to 3D virtual technology field.
Background technique
The application of 3D virtual technology is increasingly extensive, however in order to force model rendering effect more in the application of 3D virtual technology
Very, then the 3D Materials Library textures of high quality are needed.Texturing needed for current most of 3D virtual softwares includes (diffusing reflection patch
Scheme Color, normal map Normals, Displacement Displacement, specular map Specular, transparency textures
Alpha).The similar technique for generating textures at present is a simply converted by the progress of individual source color figure to generate 3D material
Textures.And its existing deficiency is: when 1, being converted by single picture due to only including single direction light source when source figure makes
The shadow directional information left, therefore its normal map being converted to also only includes the normal information in a direction.It is virtual in 3D
In application, 3D engine needs to calculate the yin under different angle in real time according to normal direction in normal map and the angular relationship of light source
Shadow relationship, to simulate more true effect.2, by individual source, figure has no idea to generate transparency figure.When it is only simple
Picture discoloration is changed into grayscale image, indicates transparency with different gray values, this mode by source figure influence of color very
Greatly.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of picture generation 3D texturing by multi-angle polishing
Method, this method includes multidirectional normal information, and the influence of color by source figure is smaller.
The present invention is realized by following proposal: a method of 3D texturing is generated by the picture of multi-angle polishing,
It is characterized by: it includes following procedure, image acquisition process → image preprocessing process → diffusing reflection textures generating process →
Normal map generating process → Displacement generating process → specular map generating process → transparency textures generating process → defeated
Result out.
It is to obtain required each angle polishing shooting and picture first, then picture out of the ordinary is pre-processed, next
First processing generates diffusing reflection textures, normal map, Displacement, high definition textures, transparency textures and then terminates to generate in order
Export result.
Described image collection process is that user by different angle polishing shoots 6 pictures respectively, wherein the four corners of the world four
Direction one picture of shooting of polishing simultaneously is named as picture COLOR, the north and is named as picture N, south to the picture that polishing is shot
To being picture S, Dong Fangxiangwei picture E, west to for picture W, Di Fangwei picture A.
Described image preprocessing process includes carrying out high frequency to picture COLOR to remove dryness processing, luminance proportion processing and to figure
Piece A carries out gray processing and reverse phase processing.
The diffusing reflection textures generating process include to picture COLOR carry out high frequency remove dryness processing and to picture COLOR into
The processing of row luminance proportion.
The normal map generating process includes following procedure:
Process one: original image is opened to picture N, picture S, picture E, picture W tetra- and carries out gray processing processing；
Process two: plus high-pass filtering as normal after picture N and picture S two are opened the superposition of gray scale original image after process one
The channel R of figure；
Process three: plus high-pass filtering as normal after picture E and picture W two are opened the superposition of gray scale original image after process one
The channel G of figure；
Process four: picture N, picture S, picture E, picture W tetra- are opened conduct after gray scale original image is superimposed by step after process one
The channel B of normal map；
Process five: the data creation normal map used in tri- channels RGB of process two, process three, process four.
The Displacement generating process the following steps are included:
Step 1: the data of channel B in normal map generating process are extracted；
Step 2: the channel B data that step 1 is extracted carry out Gaussian Blur processing；
Step 3: according to step 2 treated channel B data creation Displacement.
The specular map generating process the following steps are included:
Step 1: by normal map discoloration, grayscale image is converted to；
Step 2: creation specular map.
The transparency textures generating process the following steps are included:
Step 1: picture A discoloration is converted to grayscale image；
Step 2: the picture A after step 1 discoloration is carried out reverse phase processing；
Step 3: creation transparency textures.
The invention has the benefit that
1, the method that a kind of picture by multi-angle polishing of the present invention generates 3D texturing passes through multi-angle polishing institute
The plurality of pictures of acquisition, comprehensive simulation material texture to the diffusing reflection phenomenon of light under different light angles, overflow by generation
The light diffusing reflection attribute for the material that Reflction more accurately reacts；
2, the method that a kind of picture by multi-angle polishing of the present invention generates 3D texturing passes through East, West, South, North four
A different directions polishing 4 picture obtained calculates separately the normal in material texture tri- directions X, Y, Z in three dimensions
Then data are saved in tri- channels RGB of picture by data respectively, three-dimensional normal data is obtained compared to single picture
The bumps for the texture that one-dimensional normal data more accurately reacts, make 3D real-time rendering effect truer, the figure on general computer
Piece file is all to save image information by tri- channels RGB；
3, a kind of method that the picture by multi-angle polishing generates 3D texturing of the present invention was developed by normal map
The specular map come can effectively remove the interference that figure colour obtains the high light attribute of material in picture, allow the bloom of generation
Textures more accurately react the light-reflecting property of material；
4, the method that a kind of picture by multi-angle polishing of the present invention generates 3D texturing works as material by bottom polishing
The light passed through when matter hole can be taken by camera, and the local light without hole can be blocked from and be shot by camera
It arrives, the picture being achieved in that really has reacted the translucency of material, to keep the transparency textures generated more accurate.
Detailed description of the invention
Fig. 1 is the flow diagram for the method that a kind of picture by multi-angle polishing of the present invention generates 3D texturing.
Specific embodiment
Below with reference to Fig. 1, the present invention is further described, but the scope of the present invention does not limit to the content.
For clarity, not describing whole features of practical embodiments, in the following description, it is not described in detail well known function
And structure, because they can make the present invention chaotic due to unnecessary details, it will be understood that opening in any practical embodiments
In hair, it is necessary to make a large amount of implementation details to realize the specific objective of developer, such as according to related system or related business
Limitation, changes into another embodiment by one embodiment, additionally, it should think that this development may be complicated and expend
Time, but to those skilled in the art it is only routine work.
A method of 3D texturing being generated by the picture of multi-angle polishing, it is characterised in that: it includes following mistake
Journey, image acquisition process → image preprocessing process → diffusing reflection textures generating process → normal map generating process → displacement patch
Figure generating process → specular map generating process → transparency textures generating process → output result.
It is to obtain required each angle polishing shooting and picture first, then picture out of the ordinary is pre-processed, next
First processing generates diffusing reflection textures, normal map, Displacement, high definition textures, transparency textures and then terminates to generate in order
Export result.
Described image collection process is that user by different angle polishing shoots 6 pictures respectively, wherein the four corners of the world four
Direction one picture of shooting of polishing simultaneously is named as picture COLOR, the north and is named as picture N, south to the picture that polishing is shot
To being picture S, Dong Fangxiangwei picture E, west to for picture W, Di Fangwei picture A.
Described image preprocessing process includes carrying out high frequency to picture COLOR to remove dryness processing, luminance proportion processing and to figure
Piece A carries out gray processing and reverse phase processing.
The diffusing reflection textures generating process include to picture COLOR carry out high frequency remove dryness processing and to picture COLOR into
The processing of row luminance proportion.
The normal map generating process includes following procedure:
Process one: original image is opened to picture N, picture S, picture E, picture W tetra- and carries out gray processing processing；
Process two: plus high-pass filtering as normal after picture N and picture S two are opened the superposition of gray scale original image after process one
The channel R of figure；
Process three: plus high-pass filtering as normal after picture E and picture W two are opened the superposition of gray scale original image after process one
The channel G of figure；
Process four: picture N, picture S, picture E, picture W tetra- are opened conduct after gray scale original image is superimposed by step after process one
The channel B of normal map；
Process five: the data creation normal map used in tri- channels RGB of process two, process three, process four.
The Displacement generating process the following steps are included:
Step 1: the data of channel B in normal map generating process are extracted；
Step 2: the channel B data that step 1 is extracted carry out Gaussian Blur processing；
Step 3: according to step 2 treated channel B data creation Displacement.
The specular map generating process the following steps are included:
Step 1: by normal map discoloration, grayscale image is converted to；
Step 2: creation specular map.
The transparency textures generating process the following steps are included:
Step 1: picture A discoloration is converted to grayscale image；
Step 2: the picture A after step 1 discoloration is carried out reverse phase processing；
Step 3: creation transparency textures.
Although having done more detailed elaboration to technical solution of the present invention and having enumerated, it should be understood that for ability
For field technique personnel, modifications to the embodiments described above may be made or uses equivalent alternative solution, this is to those skilled in the art
It is it is clear that these modifications or improvements without departing from theon the basis of the spirit of the present invention, belong to the present invention for member
Claimed range.
Claims (9)
1. a kind of method that the picture by multi-angle polishing generates 3D texturing, it is characterised in that: it includes following procedure,
Image acquisition process → image preprocessing process → diffusing reflection textures generating process → normal map generating process → Displacement
Generating process → specular map generating process → transparency textures generating process → output result.
2. a kind of method that the picture by multi-angle polishing generates 3D texturing, feature according to requiring 1
It is: is to obtain required each angle polishing shooting and picture first, then picture out of the ordinary is pre-processed, next by suitable
Sequence, which is first handled, to be generated diffusing reflection textures, normal map, Displacement, high definition textures, transparency textures and then terminates to generate output
As a result.
3. the method that a kind of picture by multi-angle polishing according to claim 1 generates 3D texturing, feature
Be: described image collection process is that user by different angle polishing shoots 6 pictures respectively, wherein four corners of the world four direction
Simultaneously polishing shoot a picture be named as picture COLOR, the north to polishing shoot picture be named as picture N, south to for
Picture S, Dong Fangxiangwei picture E, west are to for picture W, Di Fangwei picture A.
4. the method that a kind of picture by multi-angle polishing according to claim 3 generates 3D texturing, feature
Be: described image preprocessing process includes carrying out high frequency to picture COLOR to remove dryness processing, luminance proportion processing and to picture A
Carry out gray processing and reverse phase processing.
5. the method that a kind of picture by multi-angle polishing according to claim 4 generates 3D texturing, feature
Be: the diffusing reflection textures generating process includes carrying out high frequency to picture COLOR to remove dryness processing and carry out picture COLOR bright
Spend equilibrium treatment.
6. the method that a kind of picture by multi-angle polishing according to claim 5 generates 3D texturing, feature
Be: the normal map generating process includes following procedure:
Process one: original image is opened to picture N, picture S, picture E, picture W tetra- and carries out gray processing processing；
Process two: plus high-pass filtering as normal map after picture N and picture S two are opened the superposition of gray scale original image after process one
The channel R；
Process three: plus high-pass filtering as normal map after picture E and picture W two are opened the superposition of gray scale original image after process one
The channel G；
Process four: step is used as normal after picture N, picture S, picture E, picture W tetra- are opened the superposition of gray scale original image after process one
The channel B of figure；
Process five: the data creation normal map used in tri- channels RGB of process two, process three, process four.
7. the method that a kind of picture by multi-angle polishing according to claim 6 generates 3D texturing, feature
Be: the Displacement generating process the following steps are included:
Step 1: the data of channel B in normal map generating process are extracted；
Step 2: the channel B data that step 1 is extracted carry out Gaussian Blur processing；
Step 3: according to step 2 treated channel B data creation Displacement.
8. the method that a kind of picture by multi-angle polishing according to claim 7 generates 3D texturing, feature
Be: the specular map generating process the following steps are included:
Step 1: by normal map discoloration, grayscale image is converted to；
Step 2: creation specular map.
9. the method that a kind of picture by multi-angle polishing according to claim 8 generates 3D texturing, feature
Be: the transparency textures generating process the following steps are included:
Step 1: picture A discoloration is converted to grayscale image；
Step 2: the picture A after step 1 discoloration is carried out reverse phase processing；
Step 3: creation transparency textures.
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