CN109919828A - A method of judging difference between 3D model - Google Patents
A method of judging difference between 3D model Download PDFInfo
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- CN109919828A CN109919828A CN201910038874.9A CN201910038874A CN109919828A CN 109919828 A CN109919828 A CN 109919828A CN 201910038874 A CN201910038874 A CN 201910038874A CN 109919828 A CN109919828 A CN 109919828A
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Abstract
The present invention discloses a kind of method for judging difference between 3D model, comprising the following steps: 1) model that 3D Model I and 3D modelⅱ are converted to CAD format obtains the CAD model I of 3D and the CAD model II of 3D；2) CAD model II of the CAD model of 3D I and 3D are converted into 2 d plane picture；3) a reference coordinates point is determined at random；4) position of reference coordinates point is marked in 2 d plane picture I, and reference coordinates point is connect with the endpoint of 2 d plane picture I, and record the linear distance between reference coordinates point and each endpoint, and first group of reduced value is obtained；5) position of reference coordinates point is marked in 2 d plane picture II, and reference coordinates point is connect with the endpoint of 2 d plane picture II, and record the linear distance between reference coordinates point and each endpoint, and second group of reduced value is obtained；The method judgment mode of difference is simple between judgement 3D model, and processing speed is fast.
Description
Technical field
The present invention relates to a kind of methods of difference between judgement 3D model.
Background technique
With the development of computer technology and the raising of computer hardware technology, the acquiring technology of threedimensional model is sent out rapidly
Exhibition.Threedimensional model not only quantitatively has to be increased tremendously, and threedimensional model using more and more extensive.It is main to answer
It include that Design of Industrial Product, virtual reality, 3d gaming, Building Design, video display animation, medical diagnosis and molecule are raw with field
Object research etc. various aspects.To these magnanimity model informations carry out effectively management be it is particularly significant, with convenient search, inquiry with
Recycling.Therefore threedimensional model is quickly identified as urgent problem.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of judgment mode is simple, the fast judgement 3D model of processing speed it
Between difference method.
To solve the above problems, the present invention adopts the following technical scheme:
A method of judging difference between 3D model, comprising the following steps:
1) model that 3D Model I and 3D modelⅱ are converted to CAD format obtains the CAD model I of 3D and the CAD mould of 3D
Type II；
2) main view of the main view of the CAD model of 3D I and the CAD model II of 3D is converted into 2 d plane picture；
3) a reference coordinates point is determined at random；
4) position of reference coordinates point is marked in 2 d plane picture I, and by reference coordinates point and 2 d plane picture I
Endpoint connection, and record the linear distance between reference coordinates point and each endpoint, obtain first group of reduced value；
5) position of reference coordinates point is marked in 2 d plane picture II, and by reference coordinates point and 2 d plane picture
II endpoint connection, and the linear distance between reference coordinates point and each endpoint is recorded, obtain second group of reduced value；
6) first group of reduced value and first group of reduced value are subjected to summation process respectively and compare two values, if
Two values are not identical, prove that 3D model has differences.
Preferably, also including to carry out verification processing if two values of the step 7) after summation process are the same.
Preferably, the specific steps of the verification processing are as follows:
1., the orthographic axonometric projection graph of the orthographic axonometric projection graph of the CAD model I of 3D and the CAD model II of 3D is converted into
2 d plane picture obtains 2 d plane picture III and 2 d plane picture IV；
2., mark in 2 d plane picture III position of reference coordinates point, and by reference coordinates point and two-dimensional surface
The endpoint of figure III connects, and records the linear distance between reference coordinates point and each endpoint, obtains third group reduced value；Two
The position of reference coordinates point is marked in dimensional plane figure IV, and reference coordinates point is connect with the endpoint of 2 d plane picture IV,
And the linear distance between reference coordinates point and each endpoint is recorded, obtain the 4th group of reduced value；
3., seek the average value of third group reduced value and the 4th group of reduced value respectively, if two are flat
Mean value is inconsistent, is judged as and has differences.
Preferably, the reference coordinates point is two-dimentional reference coordinates point.
Preferably, also including 2 d plane picture localization process in the step 3).
Preferably, the specific steps of the 2 d plane picture localization process are as follows:
A) positioning coordinate points are selected；
B) coincidence endpoint is selected according to the coordinate of each endpoint of 2 d plane picture, wherein the selection mode for being overlapped endpoint is
It is worth the obtained comparison foundation according to numerical value as each endpoint according to the x value-y of each endpoint, after subtracting y value according to x value
The maximum endpoint of result value is as coincidence endpoint；
C) it is Chong Die with coordinate points are positioned that endpoint will be overlapped.
The invention has the benefit that by the way that 3D model conversion to be compared for two dimensional model, and according to referring to seat
Linear distance between punctuate and two dimensional model judges to have differences when two models, and judgment mode is simple, and with judgement
Speed is fast.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for
For those of ordinary skill in the art, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is the flow chart of the method for difference between a kind of judgement 3D model of the present invention.
Fig. 2 is that the endpoint connection of the reference coordinates point and 2 d plane picture of difference between a kind of judgement 3D model of the present invention is shown
It is intended to.
Specific embodiment
Technical solution of the present invention is described below, it is clear that described embodiment is only present invention a part
Embodiment, instead of all the embodiments, to those skilled in the art, in the premise not made the creative labor
Under, other embodiments can also be obtained according to these embodiments.
Embodiment 1
As shown in Figs. 1-2, a method of judging difference between 3D model, comprising the following steps:
1) model that 3D Model I and 3D modelⅱ are converted to CAD format obtains the CAD model I of 3D and the CAD mould of 3D
Type II；
2) main view of the main view of the CAD model of 3D I and the CAD model II of 3D is converted into 2 d plane picture；
3) a reference coordinates point is determined at random；
4) position of reference coordinates point is marked in 2 d plane picture I, and by reference coordinates point and 2 d plane picture I
Endpoint connection, and record the linear distance between reference coordinates point and each endpoint, obtain first group of reduced value；
5) position of reference coordinates point is marked in 2 d plane picture II, and by reference coordinates point and 2 d plane picture
II endpoint connection, and the linear distance between reference coordinates point and each endpoint is recorded, obtain second group of reduced value；
6) first group of reduced value and first group of reduced value are subjected to summation process respectively and compare two values, if
Two values are not identical, prove that 3D model has differences.
It in the present embodiment, also include to carry out verification processing if two values of the step 7) after summation process are the same.
In the present embodiment, the specific steps of the verification processing are as follows:
1., the orthographic axonometric projection graph of the orthographic axonometric projection graph of the CAD model I of 3D and the CAD model II of 3D is converted into
2 d plane picture obtains 2 d plane picture III and 2 d plane picture IV；
2., mark in 2 d plane picture III position of reference coordinates point, and by reference coordinates point and two-dimensional surface
The endpoint of figure III connects, and records the linear distance between reference coordinates point and each endpoint, obtains third group reduced value；Two
The position of reference coordinates point is marked in dimensional plane figure IV, and reference coordinates point is connect with the endpoint of 2 d plane picture IV,
And the linear distance between reference coordinates point and each endpoint is recorded, obtain the 4th group of reduced value；
3., seek the average value of third group reduced value and the 4th group of reduced value respectively, if two are flat
Mean value is inconsistent, is judged as and has differences.
It in the present embodiment, also include 2 d plane picture localization process in the step 3).
In the present embodiment, the specific steps of the 2 d plane picture localization process are as follows:
A) positioning coordinate points are selected；
B) coincidence endpoint is selected according to the coordinate of each endpoint of 2 d plane picture, wherein the selection mode for being overlapped endpoint is
It is worth the obtained comparison foundation according to numerical value as each endpoint according to the x value-y of each endpoint, after subtracting y value according to x value
The maximum endpoint of result value is as coincidence endpoint；
C) it is Chong Die with coordinate points are positioned that endpoint will be overlapped.
Embodiment 2
As shown in Figs. 1-2, a method of judging difference between 3D model, comprising the following steps:
1) model that 3D Model I and 3D modelⅱ are converted to CAD format obtains the CAD model I of 3D and the CAD mould of 3D
Type II；
2) main view of the main view of the CAD model of 3D I and the CAD model II of 3D is converted into 2 d plane picture；
3) a reference coordinates point is determined at random；
4) position of reference coordinates point is marked in 2 d plane picture I, and by reference coordinates point and 2 d plane picture I
Endpoint connection, and record the linear distance between reference coordinates point and each endpoint, obtain first group of reduced value；
5) position of reference coordinates point is marked in 2 d plane picture II, and by reference coordinates point and 2 d plane picture
II endpoint connection, and the linear distance between reference coordinates point and each endpoint is recorded, obtain second group of reduced value；
6) first group of reduced value and first group of reduced value are subjected to summation process respectively and compare two values, if
Two values are not identical, prove that 3D model has differences.
It in the present embodiment, also include to carry out verification processing if two values of the step 7) after summation process are the same.
In the present embodiment, the specific steps of the verification processing are as follows:
1., the orthographic axonometric projection graph of the orthographic axonometric projection graph of the CAD model I of 3D and the CAD model II of 3D is converted into
2 d plane picture obtains 2 d plane picture III and 2 d plane picture IV；
2., mark in 2 d plane picture III position of reference coordinates point, and by reference coordinates point and two-dimensional surface
The endpoint of figure III connects, and records the linear distance between reference coordinates point and each endpoint, obtains third group reduced value；Two
The position of reference coordinates point is marked in dimensional plane figure IV, and reference coordinates point is connect with the endpoint of 2 d plane picture IV,
And the linear distance between reference coordinates point and each endpoint is recorded, obtain the 4th group of reduced value；
3., seek the average value of third group reduced value and the 4th group of reduced value respectively, sentence if two average values are inconsistent
Break to have differences.
In the present embodiment, the reference coordinates point is two-dimentional reference coordinates point.
It in the present embodiment, also include 2 d plane picture localization process in the step 3).
In the present embodiment, the specific steps of the 2 d plane picture localization process are as follows:
A) positioning coordinate points are selected；
B) coincidence endpoint is selected according to the coordinate of each endpoint of 2 d plane picture, wherein the selection mode for being overlapped endpoint is
It is worth the obtained comparison foundation according to numerical value as each endpoint according to the x value-y of each endpoint, after subtracting y value according to x value
The maximum endpoint of result value is as coincidence endpoint；
C) it is Chong Die with coordinate points are positioned that endpoint will be overlapped.
Embodiment 3
As shown in Figs. 1-2, a method of judging difference between 3D model, comprising the following steps:
1) model that 3D Model I and 3D modelⅱ are converted to CAD format obtains the CAD model I of 3D and the CAD mould of 3D
Type II；
2) main view of the main view of the CAD model of 3D I and the CAD model II of 3D is converted into 2 d plane picture；
3) a reference coordinates point is determined at random；
4) position of reference coordinates point is marked in 2 d plane picture I, and by reference coordinates point and 2 d plane picture I
Endpoint connection, and record the linear distance between reference coordinates point and each endpoint, obtain first group of reduced value；
5) position of reference coordinates point is marked in 2 d plane picture II, and by reference coordinates point and 2 d plane picture
II endpoint connection, and the linear distance between reference coordinates point and each endpoint is recorded, obtain second group of reduced value；
6) first group of reduced value and first group of reduced value are subjected to summation process respectively and compare two values, if
Two values are not identical, prove that 3D model has differences.
It in the present embodiment, also include to carry out verification processing if two values of the step 7) after summation process are the same.
In the present embodiment, the specific steps of the verification processing are as follows:
1., the orthographic axonometric projection graph of the orthographic axonometric projection graph of the CAD model I of 3D and the CAD model II of 3D is converted into
2 d plane picture obtains 2 d plane picture III and 2 d plane picture IV；
2., mark in 2 d plane picture III position of reference coordinates point, and by reference coordinates point and two-dimensional surface
The endpoint of figure III connects, and records the linear distance between reference coordinates point and each endpoint, obtains third group reduced value；Two
The position of reference coordinates point is marked in dimensional plane figure IV, and reference coordinates point is connect with the endpoint of 2 d plane picture IV,
And the linear distance between reference coordinates point and each endpoint is recorded, obtain the 4th group of reduced value；
3., seek the average value of third group reduced value and the 4th group of reduced value respectively, if two are flat
Mean value is inconsistent, is judged as and has differences.
In the present embodiment, the reference coordinates point is two-dimentional reference coordinates point.
It in the present embodiment, also include 2 d plane picture localization process in the step 3).
In the present embodiment, the specific steps of the 2 d plane picture localization process are as follows:
A) positioning coordinate points are selected；
B) coincidence endpoint is selected according to the coordinate of each endpoint of 2 d plane picture, wherein the selection mode for being overlapped endpoint is
It is worth the obtained comparison foundation according to numerical value as each endpoint according to the x value-y of each endpoint, after subtracting y value according to x value
The maximum endpoint of result value is as coincidence endpoint；
C) it is Chong Die with coordinate points are positioned that endpoint will be overlapped.
In the present embodiment, coordinate points are positioned and reference coordinates point is not be overlapped.
In the present embodiment, reference coordinates point is not in 2 d plane picture.
The invention has the benefit that by the way that 3D model conversion to be compared for two dimensional model, and according to referring to seat
Linear distance between punctuate and two dimensional model judges to have differences when two models, and judgment mode is simple, and with judgement
Speed is fast.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
The change or replacement expected without creative work, should be covered by the protection scope of the present invention.
Claims (6)
1. a kind of method of difference between judgement 3D model, it is characterised in that: the following steps are included:
1) model that 3D Model I and 3D modelⅱ are converted to CAD format obtains the CAD model I of 3D and the CAD model II of 3D；
2) main view of the main view of the CAD model of 3D I and the CAD model II of 3D is converted into 2 d plane picture；
3) a reference coordinates point is determined at random；
4) position of reference coordinates point is marked in 2 d plane picture I, and by the end of reference coordinates point and 2 d plane picture I
Point connection, and the linear distance between reference coordinates point and each endpoint is recorded, obtain first group of reduced value；
5) position of reference coordinates point is marked in 2 d plane picture II, and by reference coordinates point and 2 d plane picture II
Endpoint connection, and the linear distance between reference coordinates point and each endpoint is recorded, obtain second group of reduced value；
6) first group of reduced value and first group of reduced value are subjected to summation process respectively and compare two values, if two
Numerical value is not identical, proves that 3D model has differences.
2. the method for difference between a kind of judgement 3D model according to claim 1, it is characterised in that: also include step
7) verification processing is carried out if two values after summation process are the same.
3. the method for difference between a kind of judgement 3D model according to claim 2, it is characterised in that: the verification processing
Specific steps are as follows:
1., the orthographic axonometric projection graph of the orthographic axonometric projection graph of the CAD model I of 3D and the CAD model II of 3D is converted into two dimension
Plan view obtains 2 d plane picture III and 2 d plane picture IV；
2., mark in 2 d plane picture III position of reference coordinates point, and by reference coordinates point and 2 d plane picture III
Endpoint connection, and record the linear distance between reference coordinates point and each endpoint, obtain third group reduced value；It is flat in two dimension
The position of reference coordinates point is marked in face figure IV, and reference coordinates point is connect with the endpoint of 2 d plane picture IV, and remembers
The linear distance between reference coordinates point and each endpoint is recorded, the 4th group of reduced value is obtained；
3., seek the average value of third group reduced value and the 4th group of reduced value respectively, be judged as if two average values are inconsistent
It has differences.
4. the method for difference between a kind of judgement 3D model according to claim 3, it is characterised in that: the reference coordinates
Point is two-dimentional reference coordinates point.
5. the method for difference between a kind of judgement 3D model according to claim 4, it is characterised in that: in the step 3)
It also include 2 d plane picture localization process.
6. the method for difference between a kind of judgement 3D model according to claim 5, it is characterised in that: the two-dimensional surface
The specific steps of figure localization process are as follows:
A) positioning coordinate points are selected；
B) coincidence endpoint is selected according to the coordinate of each endpoint of 2 d plane picture, wherein being overlapped according to the selection mode of endpoint
X value-the y of each endpoint is worth the obtained comparison foundation according to numerical value as each endpoint, subtracts result after y value according to x value
The maximum endpoint of numerical value is as coincidence endpoint；
C) it is Chong Die with coordinate points are positioned that endpoint will be overlapped.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112132167A (en) * | 2019-06-24 | 2020-12-25 | 商汤集团有限公司 | Image generation and neural network training method, apparatus, device, and medium |
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