CN107248187A - A kind of method of quick three-dimensional model texture cutting restructuring - Google Patents
A kind of method of quick three-dimensional model texture cutting restructuring Download PDFInfo
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- CN107248187A CN107248187A CN201710362746.0A CN201710362746A CN107248187A CN 107248187 A CN107248187 A CN 107248187A CN 201710362746 A CN201710362746 A CN 201710362746A CN 107248187 A CN107248187 A CN 107248187A
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000000284 extract Substances 0.000 claims description 10
- 238000000605 extraction Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 abstract description 2
- 238000005457 optimization Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005194 fractionation Methods 0.000 description 1
Classifications
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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
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/10—Segmentation; Edge detection
- G06T7/11—Region-based segmentation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2200/00—Indexing scheme for image data processing or generation, in general
- G06T2200/04—Indexing scheme for image data processing or generation, in general involving 3D image data
Abstract
The invention discloses a kind of method of quick three-dimensional model texture cutting restructuring, this method is cut by texture, threedimensional model image data is divided into the texture rectangle with certain inclusion relation, according to the width of texture rectangle, all texture Rectangle fillings into new threedimensional model picture are realized by the restructuring of threedimensional model using the method for binary tree illustration, and calculate new texture coordinate.This method can maximize the effective area of picture using binary tree illustration, realize that Quick Casting, model reduce EMS memory occupation after splitting using the texture after cutting restructuring, realize that the smooth loading of big threedimensional model shows.
Description
Technical field
The present invention relates to technical field of image processing, and in particular to after big data threedimensional model is split, texture cutting restructuring
Realization, especially a kind of quick three-dimensional model texture cutting restructuring method.
Background technology
Threedimensional model being capable of directly perceived, comprehensive display data.But data are big, there is certain requirement, and property to machine hardware
Can on be not very friendly.Prevalence and the continuous expansion of application with threedimensional model, the optimization of performance are imperative.
An existing big data threedimensional model, simple model split it is relatively simple, but texture split realize compared with
Difficulty, therefore the problem of left texture bulk redundancy after big data is split, causes in performance not smooth enough and takes resource
Excessive shortcoming.
Therefore, invent one kind to be split according to model, realize that texture is split, memory optimization takes and performance issue is very heavy
Will.It can thus solve the problems, such as that big data is browsed and using interim card, improves Consumer's Experience, save EMS memory occupation, reduce
Browse requirement of the three-dimensional data to computer hardware.
The content of the invention
For problem of the prior art, the present invention proposes a kind of method of quick three-dimensional model texture cutting restructuring, for
When big data does model fractionation, Cutting texture picture, the texture information that an extraction model is needed to use.It is above-mentioned in order to solve
Technical problem, the technical solution adopted by the present invention is：
The present invention provides a kind of method of quick three-dimensional model texture cutting restructuring, comprises the following steps：
S1, according to the image data of original three-dimensional model, extracts texture rectangle；
S2, by quick sort, is ranked up from big to small according to the height of texture rectangle；
S3, the smallest square for pasting texture rectangle is calculated according to all rectangular areas, will using Binomial model
All texture rectangles are pasted in smallest square successively according to sequence；
S4, it is wide and high, new according to old texture coordinate, the starting point coordinate of texture rectangle, original three-dimensional model image data
Threedimensional model picture width and high and texture rectangle be attached to new source of graph coordinate and calculate new texture coordinate.
The beneficial effects of the invention are as follows：
The effective area that can make picture using binary tree illustration is maximized, and realizes that Quick Casting, model are used after splitting
Texture after cutting restructuring reduces EMS memory occupation, realizes that the smooth loading of big threedimensional model shows.
Brief description of the drawings
Fig. 1 is that rectangle picture of the present invention recombinates schematic diagram；
Fig. 2 is the legend that texture of the present invention cuts restructuring, wherein (A) for a certain triangular facet in original three-dimensional model picture and
Its minimum enclosed rectangle legend, (B) is the legend of the triangular facet and its minimum enclosed rectangle in new figure after recombinating.
Embodiment
Below in conjunction with the accompanying drawings and embodiment the invention will be further described.
As shown in figure 1, the present invention provides a kind of method of quick three-dimensional model texture cutting restructuring, comprise the following steps：
S1, first original three-dimensional model image data, extract the minimum enclosed rectangle of all triangular facets, then travel through institute
Have rectangular texture pictorial information, according to the position of rectangle and size judge whether rectangle with inclusion relation and whether
The rectangle of common factor is there are, the pictorial information for retaining larger rectangle is merged if it there is the rectangle with inclusion relation, if
There are some rectangles has certain proportion to overlap, then sets up and select the new rectangle of all overlapping rectangles for frame and retain larger rectangle
Pictorial information, so as to generate rectangular texture picture set to be pasted.
S2, by quick sort, is ranked up from big to small according to the height of texture rectangle；In order to reduce the complexity of program
Degree, without being rotated tall and big in wide rectangle.High according to rectangular area, rectangle respectively by practice, rectangle is wide to wait sequence,
It was found that according to high Sorting space utilization rate highest.
S3, all rectangles is refilled among new picture, and the wide and height of new picture is determined here, is also filled out
Fill rule.All rectangular area summations are calculated, then evolution, which rounds up, calculates the length of side of smallest square, then using y-bend
The method of tree is existing to be attached to all rectangles in new picture according to sequence successively.Specifically include following steps：
S31, calculates all rectangular texture picture area summations in rectangle picture set to be pasted, then using extraction of square root simultaneously
The method rounded up calculates the length of side of the smallest square for pasting rectangular texture picture；
S32, using binary tree picture inserting method by the rectangular texture picture in rectangular texture just list to be pasted according to row
Sequence is pasted in smallest square successively.
S321, puts fixed by the region for not pasting rectangular texture picture in the smallest square for pasting rectangular texture picture
Justice is clear area, extracts the maximum texture picture of picture height in rectangular texture just list to be pasted, left with clear area
Upper angle alignment is pasted, and deletes the picture record in lists；
S322, according to pasted texture picture following that remaining clear area is divided into right part clear area and bottom is empty
Not busy region；
S323, extracts the maximum texture picture of picture height in rectangular texture just list to be pasted, judges the picture
Whether width and height are not more than the width and height of right part clear area：
If the texture picture then is filled into stickup to right part clear area, and picture note is deleted in lists
Record, while the region is divided into two parts again according to the method described in step S322, then repeats the step, directly
Paste and finish to all pictures；
Otherwise step S324 is jumped to；
S324, judges whether the width and height of texture picture are not more than the width and height of bottom clear area：
If the texture picture then is filled into stickup to bottom clear area, and picture note is deleted in lists
Record, while the region is divided into two parts again according to the method described in step S322, and jumps to step S323, extracts
Next texture picture is filled paste operation, is finished until all pictures are pasted；
Otherwise the length of side of smallest square is extended according to designated ratio, and jumps to step S323.
S4, carries out calculating new texture coordinate newUV according to the following formula：
Wherein, oldUV is old texture picture coordinate, and (oldX, oldY) represents the starting point coordinate of original rectangular,
(Swidth, Sheight) represents the wide and height of original three-dimensional model picture, and (Nwidth, Nheight) represents new threedimensional model
The wide and height of picture, (newX, newY) represents that texture rectangle is attached to new source of graph coordinate.
It is specific as shown in Fig. 2 original three-dimensional model picture such as Fig. 2 (A) is shown, the texture that some face of model is used
Triangle ABC, it is assumed that the UV coordinates on original triangular facet ABC three summits be A (0.5,0), B (0.3,0.45), C (0.7,
0.7) coordinate (30,0) of the left upper apex of minimum enclosed rectangle under rectangular coordinate system }, is defined as minimum enclosed rectangle
Origin coordinates, the wide height of original three-dimensional model picture is 100, and origin coordinates of the rectangle in Fig. 2 (B) is (0,0) after restructuring,
The wide height of new figure is respectively 80.Then A1 coordinate is：X=(0.5*100-30+0)/80=0.25, y=(0*100-0+0)/80
=0, the UV coordinates of new figure can be calculated by that analogy.
The part not illustrated in specification is prior art or common knowledge.The present embodiment is merely to illustrate the invention,
Rather than limitation the scope of the present invention, those skilled in the art change for equivalent replacement of the invention made etc. to be considered
Fall into invention claims institute protection domain.
Claims (5)
1. a kind of method of quick three-dimensional model texture cutting restructuring, it is characterised in that：Comprise the following steps：
S1, according to the image data of original three-dimensional model, extracts texture rectangle；
S2, by quick sort, is ranked up from big to small according to the height of texture rectangle；
S3, the smallest square for pasting texture rectangle is calculated according to all rectangular areas, will be all using Binomial model
Texture rectangle is pasted in smallest square successively according to sequence, generates new threedimensional model picture；
S4, according to old texture coordinate, the starting point coordinate of texture rectangle, original three-dimensional model image data it is wide and high, new three
The width and high and texture rectangle of dimension module picture are attached to new source of graph coordinate and calculate new texture coordinate.
2. a kind of method of quick three-dimensional model texture cutting restructuring according to claim 1, it is characterised in that：The step
Suddenly S1 is specially：The image data of original three-dimensional model, extracts the minimum enclosed rectangle of all triangular facets, then travels through institute first
Have rectangular texture pictorial information, according to the position of rectangle and size judge whether rectangle with inclusion relation and whether
The rectangle of common factor is there are, the pictorial information for retaining larger rectangle is merged if it there is the rectangle with inclusion relation, if
There are some rectangles has certain proportion to overlap, then sets up and select the new rectangle of all overlapping rectangles for frame and retain larger rectangle
Pictorial information, so as to generate rectangular texture picture set to be pasted.
3. a kind of method of quick three-dimensional model texture cutting restructuring according to claim 2, it is characterised in that：The step
Rapid S3 specifically includes following sub-step：
S31, calculates all rectangular texture picture area summations in rectangle picture set to be pasted, then uses extraction of square root and upward
The method rounded calculates the length of side of the smallest square for pasting rectangular texture picture；
S32, using binary tree picture inserting method by the rectangular texture picture in rectangular texture just list to be pasted according to sequence according to
It is secondary to paste in smallest square.
4. a kind of method of quick three-dimensional model texture cutting restructuring according to claim 3, it is characterised in that：The step
Rapid S32 specifically includes following sub-step：
S321, the region for not pasting rectangular texture picture in the smallest square for pasting rectangular texture picture is put and is defined as
Clear area, extracts the maximum texture picture of picture height in rectangular texture just list to be pasted, with the clear area upper left corner
Alignment is pasted, and deletes the picture record in lists；
S322, by remaining clear area right part clear area and bottom free area are divided into according to the following of texture picture has been pasted
Domain；
S323, extracts the maximum texture picture of picture height in rectangular texture just list to be pasted, judges the height of the picture
Whether it is not more than the height and width of right part clear area with width：
If the texture picture then is filled into stickup to right part clear area, and the picture record is deleted in lists, together
When the region is divided into two parts again according to the method described in step S322, the step is then repeated, until institute
There is picture to paste to finish；
Otherwise step S324 is jumped to；
S324, judges whether the height and width of texture picture are not more than the height and width of bottom clear area：
If the texture picture then is filled into stickup to bottom clear area, and the picture record is deleted in lists, together
When the region is divided into two parts again according to the method described in step S322, and jump to step S323, extract next
Open texture picture and be filled paste operation, finished until all pictures are pasted；
Otherwise the length of side of smallest square is extended according to designated ratio, and jumps to step S323.
5. a kind of method of quick three-dimensional model texture cutting restructuring according to claim 4, it is characterised in that：The step
New texture coordinate newUV is calculated according to the following formula in rapid S4：
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Wherein, oldUV is old texture picture coordinate, and (oldX, oldY) represents the starting point coordinate of original rectangular, (Swidth,
Sheight) represent the wide and height of threedimensional model picture, (Nwidth, Nheight) represent new threedimensional model picture width and
Height, (newX, newY) represents that texture rectangle is attached to new source of graph coordinate.
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Cited By (1)
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| CN109241304A (en) * | 2018-08-16 | 2019-01-18 | 广州视源电子科技股份有限公司 | image processing method, device and equipment |
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Denomination of invention: A Fast Method for Texture Cutting and Reorganization of 3D Models Effective date of registration: 20230718 Granted publication date: 20201208 Pledgee: Guanggu Branch of Wuhan Rural Commercial Bank Co.,Ltd. Pledgor: WUHAN INFOEARTH INFORMATION CO.,LTD. Registration number: Y2023420000306 |