CN106385532A - 3D real-time imaging method - Google Patents
3D real-time imaging method Download PDFInfo
- Publication number
- CN106385532A CN106385532A CN201610787050.8A CN201610787050A CN106385532A CN 106385532 A CN106385532 A CN 106385532A CN 201610787050 A CN201610787050 A CN 201610787050A CN 106385532 A CN106385532 A CN 106385532A
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- rotary part
- dimensional
- shooting
- numerical value
- real time
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- 238000003384 imaging method Methods 0.000 title abstract 2
- 238000000034 method Methods 0.000 claims description 29
- 239000000284 extract Substances 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 230000006870 function Effects 0.000 description 5
- 230000008569 process Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000004308 accommodation Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/60—Control of cameras or camera modules
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/24—Measuring arrangements characterised by the use of optical techniques for measuring contours or curvatures
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- G06T3/08—
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T3/00—Geometric image transformation in the plane of the image
- G06T3/60—Rotation of a whole image or part thereof
- G06T3/604—Rotation of a whole image or part thereof using a CORDIC [COordinate Rotation Digital Compute] device
Abstract
The invention discloses a 3D real-time imaging method, and relates to the technical field of thermo-technical measurement. The shooting frame rate of a camera is adjusted according to the rotating speed of a rotary part, so that discontinuous shooting is controlled automatically, manual operation is not needed, the labor resource is saved, and the shooting control precision is improved; and a 2D image obtained by shooting is converted into a 3D stereoscopic image, the rotary part can be reduced in the image, and further, more bases are provided for research on the high-speed rotary part and surface condition thereof.
Description
Technical field
The present invention relates to thermal measurement technical field, more particularly, to a kind of three-dimensional real time imagery method.
Background technology
In order to study to the part of high-speed rotation, it is possible to use high-speed camera shoots to it, such as, grinding
Study carefully icing cone surface ice condition when, just using high-speed camera, icing cone is shot, then according to shooting
To image the ice condition on surface is studied.
At present, shoot the part of high-speed rotation using high-speed camera, typically video camera is controlled using manually mode
Startup and stopping, not only wasting time and energy, consume substantial amounts of human resources, and control accuracy is low, also cannot be according to rotating part
The frame rate of the rotational speed regulation camera of part, meanwhile, the image photographing is two dimensional image, be unfavorable for high-speed rotary part and
Its surface condition is studied.
Content of the invention
It is an object of the invention to provide a kind of three-dimensional real time imagery method, thus solving aforementioned present in prior art
Problem.
To achieve these goals, the technical solution used in the present invention is as follows：
A kind of three-dimensional real time imagery method, comprises the steps：
S1, determines the acquisition parameters of high-speed camera, including time interval and single group between shooting group number, frame rate, group
Interior frame number；
S2, coding controls described high-speed camera according to described acquisition parameters, rotary part to be shot, and obtains
The two dimensional image of described rotary part；
S3, extracts the boundary contour of described two dimensional image；
S4, is separated into two-dimensional coordinate, and the rotation according to described rotary part by extracting the described boundary contour obtaining
Gyration carries out changes in coordinates, obtains constituting the three-dimensional coordinate of the point of described rotary part；
S5, is fitted obtaining the bus of described rotary part to the three-dimensional coordinate of the point of described rotary part；Using institute
State bus group and do curved surface, form three-dimensional image.
Preferably, in S1, described frame rate is calculated using equation below：
In formula,
f：Frame rate,
θ：The angle that when shooting every time, rotary part rotated through relative to last time,
n：The rotating speed of rotary part.
Preferably, in S1, in described single group, frame number is calculated using equation below：
M=360/ θ
In formula,
m：Frame number in single group,
θ：The angle that when shooting every time, rotary part rotated through relative to last time.
Preferably, in S1, described shooting group number is calculated using equation below：
In formula,
l：Shooting group number,
I：Intensity,
δ：Precision,
t：Time.
Preferably, S3 comprises the steps：
S301, sets a numerical value；
S302, each pixel of the gray level image of described two dimensional image and the numerical value of this setting is compared, obtains
The all pixels point of this numerical value must be more than, and all pixels point less than this numerical value；
S303, obtain be located at the described all pixels point more than this numerical value, and less than this numerical value all pixels point it
Between pixel, form described two dimensional image boundary contour.
Preferably, S4 comprises the steps：
S401, outline line is that pixel forms one by one, the central shaft of described rotary part is set to X-axis, described rotation
The summit of part is set to initial point, obtains the two-dimensional coordinate of each pixel forming described boundary contour；
S402, the two-dimensional coordinate obtaining in S401 is converted into polar coordinates；
S403, the angle being turned over according to the described rotary part of every graphical representation, obtain the described side forming this image
The three-dimensional cylindrical coordinates of each pixel of boundary's outline line.
Preferably, S5 specifically can adopt and be implemented with the following method：
S501, the three-dimensional cylindrical coordinates of all pixels obtaining in S403 point is converted in surf function in Matlab requiring
Matrix,
S502, calls the surf function in Matlab, obtains three-dimensional image.
The invention has the beneficial effects as follows：A kind of three-dimensional real time imagery method provided in an embodiment of the present invention, by according to rotation
The rotating speed of rotation member, to adjust the frame rate of camera, is realized automatically controlling of discontinuity shooting, and need not manually be operated, not only
Save human resources, and improve shooting control accuracy, in addition, by changing into three-dimensional by shooting the two dimensional image obtaining
Stereo-picture, that can realize rotary part on image reduces the research so as to high-speed rotary part and its surface condition
More there is foundation.
Brief description
Fig. 1 is a kind of three-dimensional real time imagery method flow schematic diagram provided in an embodiment of the present invention.
Specific embodiment
In order that the objects, technical solutions and advantages of the present invention become more apparent, below in conjunction with accompanying drawing, the present invention is entered
Row further describes.It should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not used to
Limit the present invention.
As shown in figure 1, embodiments providing a kind of three-dimensional real time imagery method, comprise the steps：
S1, determines the acquisition parameters of high-speed camera, including time interval and single group between shooting group number, frame rate, group
Interior frame number；
S2, coding controls described high-speed camera according to described acquisition parameters, rotary part to be shot, and obtains
The two dimensional image of described rotary part；
S3, extracts the boundary contour of described two dimensional image；
S4, is separated into two-dimensional coordinate, and the rotation according to described rotary part by extracting the described boundary contour obtaining
Gyration carries out changes in coordinates, obtains constituting the three-dimensional coordinate of the point of described rotary part；
S5, is fitted obtaining the bus of described rotary part to the three-dimensional coordinate of the point of described rotary part；Using institute
State bus group and do curved surface, form three-dimensional image.
In practical operation, determine time interval between shooting group number, frame rate, group, frame number in single group as requested
Set in operation interface after (every group of shooting number), store path, need to click on when starting to shoot and start shooting and can complete
Image automatic shooting and storage.
Programme controlled Main Function is just that instead of people makes it more accurate come the shooting and stopping to control camera, specifically
Process in turn includes the following steps：Camera starts shooting --- shoot the n second----stop shoots and transmits
Data ----waiting m (the every group of interval-n) second ----startup shoots and is repeated up to complete the shooting of all groups of numbers.
In S1, described frame rate can be calculated using equation below：
In formula,
f：Frame rate,
θ：The angle that when shooting every time, rotary part rotated through relative to last time,
n：The rotating speed of rotary part.
In S1, in described single group, frame number can be calculated using equation below：
M=360/ θ
In formula,
m：Frame number in single group,
θ：The angle that when shooting every time, rotary part rotated through relative to last time.
In S1, described shooting group number can be calculated using equation below：
In formula,
l：Shooting group number,
I：Intensity,
δ：Precision,
t：Time.
S3 may include steps of：
S301, sets a numerical value；
S302, each pixel of the gray level image of described two dimensional image and the numerical value of this setting is compared, obtains
The all pixels point of this numerical value must be more than, and all pixels point less than this numerical value；
S303, obtain be located at the described all pixels point more than this numerical value, and less than this numerical value all pixels point it
Between pixel, form described two dimensional image boundary contour.
The extraction process of the boundary contour of above-mentioned two dimensional image, mainly to judge according to gray scale：The gray scale of picture
Each pixel of image is stored as a byte in computer, and its value is set as certain number between 0-255.Numerical value
Bigger this pixel of expression brighter (white), numerical value is more little then to represent pixel darker (black).First set a numerical value, compared with this number
What value was big is considered as white pixel, and little compared with this numerical value is considered as black picture element.White pixel is edge with the boundary of black picture element.
In the embodiment of the present invention, S4 may include steps of：
S401, outline line is that pixel forms one by one, the central shaft of described rotary part is set to X-axis, described rotation
The summit of part is set to initial point, obtains the two-dimensional coordinate of each pixel forming described boundary contour；
S402, the two-dimensional coordinate obtaining in S401 is converted into polar coordinates；
S403, the angle being turned over according to the described rotary part of every graphical representation, obtain the described side forming this image
The three-dimensional cylindrical coordinates of each pixel of boundary's outline line.
S5 specifically can adopt and be implemented with the following method：
S501, the three-dimensional cylindrical coordinates of all pixels obtaining in S403 point is converted in surf function in Matlab requiring
Matrix,
S502, calls the surf function in Matlab, obtains three-dimensional image.
By using technique scheme disclosed by the invention, having obtained following beneficial effect：The embodiment of the present invention carries
For a kind of three-dimensional real time imagery method, adjust the frame rate of camera by the rotating speed according to rotary part, realize interruption
Property shoot automatically control, and need not manually operate, not only save human resources, and improve shooting control accuracy, separately
Outward, by changing into three-dimensional image by shooting the two dimensional image obtaining, the reduction of rotary part can be realized on image,
So that the research to high-speed rotary part and its surface condition more has foundation.
Each embodiment in this specification is all described by the way of going forward one by one, what each embodiment stressed be with
The difference of other embodiment, between each embodiment identical similar partly mutually referring to.
Those skilled in the art should be understood that the sequential of the method and step that above-described embodiment provides can be entered according to actual conditions
Row accommodation, is concurrently carried out also dependent on actual conditions.
All or part of step in the method that above-described embodiment is related to can be instructed by program correlation hardware Lai
Complete, described program can be stored in the storage medium that computer equipment can read, for executing the various embodiments described above side
All or part of step described in method.Described computer equipment, for example：Personal computer, server, the network equipment, intelligent sliding
Dynamic terminal, intelligent home device, wearable intelligent equipment, vehicle intelligent equipment etc.；Described storage medium, for example：RAM、
ROM, magnetic disc, tape, CD, flash memory, USB flash disk, portable hard drive, storage card, memory stick, webserver storage, network cloud storage
Deng.
Last in addition it is also necessary to explanation, herein, such as first and second or the like relational terms be used merely to by
One entity or operation are made a distinction with another entity or operation, and not necessarily require or imply these entities or operation
Between there is any this actual relation or order.And, term " inclusion ", "comprising" or its any other variant meaning
Covering comprising of nonexcludability, so that including a series of process of key elements, method, commodity or equipment not only include that
A little key elements, but also include other key elements being not expressly set out, or also include for this process, method, commodity or
The intrinsic key element of equipment.In the absence of more restrictions, the key element being limited by sentence "including a ...", does not arrange
Remove and also there is other identical element in the process including described key element, method, commodity or equipment.
The above is only the preferred embodiment of the present invention it is noted that ordinary skill people for the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
Depending on protection scope of the present invention.
Claims (7)
1. a kind of three-dimensional real time imagery method is it is characterised in that comprise the steps：
S1, determines the acquisition parameters of high-speed camera, including frame in time interval between shooting group number, frame rate, group and single group
Number；
S2, coding controls described high-speed camera according to described acquisition parameters, rotary part to be shot, and obtains described
The two dimensional image of rotary part；
S3, extracts the boundary contour of described two dimensional image；
S4, is separated into two-dimensional coordinate, and the anglec of rotation according to described rotary part by extracting the described boundary contour obtaining
Degree carries out changes in coordinates, obtains constituting the three-dimensional coordinate of the point of described rotary part；
S5, is fitted obtaining the bus of described rotary part to the three-dimensional coordinate of the point of described rotary part；Using described mother
Line group does curved surface, forms three-dimensional image.
2. three-dimensional real time imagery method according to claim 1 is it is characterised in that in S1, described frame rate is using such as
Lower formula is calculated：
In formula,
f：Frame rate,
θ：The angle that when shooting every time, rotary part rotated through relative to last time,
n：The rotating speed of rotary part.
3. three-dimensional real time imagery method according to claim 1 is it is characterised in that in S1, in described single group, frame number adopts
Equation below is calculated：
M=360/ θ
In formula,
m：Frame number in single group,
θ：The angle that when shooting every time, rotary part rotated through relative to last time.
4. three-dimensional real time imagery method according to claim 1 is it is characterised in that in S1, described shooting group number is using such as
Lower formula is calculated：
In formula,
l：Shooting group number,
I：Intensity,
δ：Precision,
t：Time.
5. three-dimensional real time imagery method according to claim 1 is it is characterised in that S3 comprises the steps：
S301, sets a numerical value；
S302, each pixel of the gray level image of described two dimensional image and the numerical value of this setting are compared, and obtain big
In all pixels point of this numerical value, and all pixels point less than this numerical value；
S303, obtains and is located at the described all pixels point more than this numerical value, and be less than between all pixels point of this numerical value
Pixel, forms the boundary contour of described two dimensional image.
6. three-dimensional real time imagery method according to claim 1 is it is characterised in that S4 comprises the steps：
S401, outline line is that pixel forms one by one, the central shaft of described rotary part is set to X-axis, described rotary part
Summit be set to initial point, obtain the two-dimensional coordinate of each pixel forming described boundary contour；
S402, the two-dimensional coordinate obtaining in S401 is converted into polar coordinates；
S403, the angle being turned over according to the described rotary part of every graphical representation, obtain the described border wheel forming this image
The three-dimensional cylindrical coordinates of each pixel of profile.
7. three-dimensional real time imagery method according to claim 6 is it is characterised in that S5 specifically can adopt to enter with the following method
Row is implemented：
S501, the three-dimensional cylindrical coordinates of all pixels obtaining in S403 point is converted into the square require in surf function in Matlab
Battle array,
S502, calls the surf function in Matlab, obtains three-dimensional image.
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Cited By (1)
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| CN109978758A (en) * | 2019-03-25 | 2019-07-05 | 深圳职业技术学院 | A kind of three-dimensional modeling method based on computer graphic image |
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Effective date of registration: 20170504 Address after: 100000 Beijing city Haidian District Xizhimen village on No. 3 Beijing Jiaotong University Applicant after: Yang Lixin Applicant after: Zhou Jianjun Applicant after: Li Yundan Applicant after: Lu Taijin Address before: 100000 Beijing city Haidian District Xizhimen village on No. 3 Beijing Jiaotong University Applicant before: Yang Lixin |
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Application publication date: 20170208 |