CN106352797A - Method and terminal using two cameras to measure length of object - Google Patents
Method and terminal using two cameras to measure length of object Download PDFInfo
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- CN106352797A CN106352797A CN201510409496.2A CN201510409496A CN106352797A CN 106352797 A CN106352797 A CN 106352797A CN 201510409496 A CN201510409496 A CN 201510409496A CN 106352797 A CN106352797 A CN 106352797A
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Abstract
The invention discloses a method using two cameras to measure the length of an object. The method includes: determining a to-be-measured object in a preview image; acquiring the imaging information, on the two imaging faces of the two cameras, of the to-be-measured object; determining the actual length of the to-be-measured object according to the imaging information and the parameter information of the two cameras. The method has the advantages that the length of one reference object needs not to be known, photographing is not needed, a user can measure the length of the to-be-measured object anytime and anywhere, and user experience is improved.
Description
Technical field
The present invention relates to technical field of image processing, more particularly, to a kind of long using dual camera measurement object
The method of degree and terminal.
Background technology
Existing mobile phone camera measurement length Technical comparing is simply it is common practice that first clap this object
Photo, look for an object of reference inside photo it is known that the physical length of object of reference.Finally using figure
The principle of upper distance/actual range=engineer's scale tries to achieve the length of the object wanting to know.For example, when wanting to know
Obtain, when road water dispenser length, the length first knowing bucket, then utilize water dispenser figure length (known)
On/water dispenser physical length=bucket figure, length (known)/bucket physical length (known), seeks drinking-water
The length of machine.
It can be seen that, prior art must be it is to be understood that the physical length of object of reference just can obtain measuring object
Length, and this is very inconvenient for user.Because when user travels outside, sometimes
Time can be very random the building wondered at the moment how high, or someone is how high, without looking for again
One object of reference.So, existing measurement scheme is defective to be surveyed whenever and wherever possible it is impossible to meet user
The demand of amount object length.
Content of the invention
The present invention provides a kind of method of utilization dual camera measurement object length and terminal, existing in order to solve
There is the measurement length scheme in technology can not meet the demand that user measures object length whenever and wherever possible
Problem.
According to one aspect of the present invention, provide a kind of method that utilization dual camera measures object length,
Including:
Object under test is determined in preview screen；
Obtain image-forming information on two imaging surfaces of dual camera for the described object under test；
According to described image-forming information and dual camera parameter information, determine the physical length of object under test.
Alternatively, in the method for the invention, described according to image-forming information with dual camera parameter information,
Determine the physical length of object under test, comprising:
Transfer the thing based on dual camera building in advance, mirror, as analytic geometry model；
Based on described image-forming information and dual camera parameter information, solve to be measured in described analytic geometry model
The extreme coordinates of object, according to described extreme coordinates, ask for the physical length of object under test.
Alternatively, in the method for the invention, described thing based on dual camera, mirror, as parsing
Geometrical model is:
X direction is parallel to the direction of light path；
Y direction is perpendicular to the direction of light path；
The origin of coordinates is to be capable of determining that on the camera lens photocentre coordinate and two imaging surfaces of dual camera
The origin of coordinates that the extreme coordinates of picture set for principle.
Alternatively, in the method for the invention, the described origin of coordinates is: two imaging surfaces of dual camera
Between center.
Alternatively, in the method for the invention, described according to image-forming information with dual camera parameter information,
Determine the physical length of object under test, comprising:
When object under test is parallel with two imaging surfaces of dual camera, taken the photograph with double according to described image-forming information
As head parameter information, to the triangle being made up of picture and camera lens photocentre and be made up of thing and camera lens photocentre three
The angular physical length carrying out similar calculating, obtaining object under test.
According to another aspect of the present invention, provide a kind of terminal, described terminal comprises dual camera, institute
State terminal also to include:
Information acquisition module, for determining object under test in preview screen, and obtains described object under test
Image-forming information on two imaging surfaces of dual camera；
Message processing module, for according to described image-forming information and dual camera parameter information, determining to be measured
The physical length of object.
Alternatively, in terminal of the present invention, described information processing module, specifically for transferring structure in advance
The thing based on dual camera built, mirror, as analytic geometry model, based on described image-forming information and double
Camera parameter information, solves the extreme coordinates of object under test in described analytic geometry model, according to described
Extreme coordinates, ask for the physical length of object under test.
Alternatively, in terminal of the present invention, described thing based on dual camera, mirror, as parsing
Geometrical model is:
X direction is parallel to the direction of light path；
Y direction is perpendicular to the direction of light path；
The origin of coordinates is to be capable of determining that on the camera lens photocentre coordinate and two imaging surfaces of dual camera
The origin of coordinates that the extreme coordinates of picture set for principle.
Alternatively, in terminal of the present invention, the described origin of coordinates is: two imaging surfaces of dual camera
Between center.
Alternatively, in terminal of the present invention, described information processing module, specifically in object under test
When parallel with two imaging surfaces of dual camera, according to described image-forming information and dual camera parameter information,
Carried out similar to the triangle being made up of picture and camera lens photocentre and by the triangle that thing and camera lens photocentre form
Calculate, obtain the physical length of object under test.
The present invention has the beneficial effect that:
Scheme of the present invention need not be known the length of certain object of reference, need not take pictures, and only need to enter preview
Pattern just can complete to survey long operation, meet the demand that user measures something body length whenever and wherever possible, carry
The high experience of user.
Brief description
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
The accompanying drawing applying required use in example or description of the prior art be briefly described it should be apparent that, under
Accompanying drawing in the description of face is only some embodiments of the present invention, comes for those of ordinary skill in the art
Say, without having to pay creative labor, other accompanying drawings can also be obtained according to these accompanying drawings.
The flow chart that Fig. 1 measures the method for object length for a kind of utilization dual camera that the present invention provides；
Fig. 2 is dual camera imaging schematic diagram in the present invention；
Fig. 3 is the analytic geometry illustraton of model being built based on dual camera imaging schematic diagram in the present invention；
Fig. 4 is another dual camera imaging schematic diagram in the present invention；
A kind of structured flowchart of terminal that Fig. 5 provides for the present invention；
Fig. 6 is the first step schematic diagram that in the present invention, user's using terminal measures object length；
Fig. 7 is the second step schematic diagram that in the present invention, user's using terminal measures object length；
Fig. 8 is the 3rd step schematic diagram that in the present invention, user's using terminal measures object length；
Fig. 9 is the 4th step schematic diagram that in the present invention, user's using terminal measures object length；
Figure 10 is the 5th step schematic diagram that in the present invention, user's using terminal measures object length.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe it is clear that described embodiment is only a part of embodiment of the present invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
The every other embodiment being obtained under the premise of going out creative work, broadly falls into the scope of protection of the invention.
Carry out whenever and wherever possible surveying high demand to meet user, the present invention provides one kind to utilize dual camera
The method of measurement object length and terminal, it does not need to obtain the length of actual object by referring to thing,
As long as user holds Dual-camera handset from the point of view of user level, open camera applications, against need measure
Object preview once it is possible to know the length of object, greatly improve the experience of user.
Below by several specific embodiments, the detailed implementation process of the present invention is illustrated.
Embodiment one
The embodiment of the present invention provides a kind of method that utilization dual camera measures object length, as shown in figure 1,
Comprise the steps:
Step s101, determines object under test in preview screen；
In the present invention, by picture technology of identification, the object in preview screen can be identified, and with
The object that user selectes is as the object under test determining.
Step s102, obtains image-forming information on two imaging surfaces of dual camera for the object under test；
Step s103, according to described image-forming information and dual camera parameter information, determines the reality of object under test
Border length.
In this step, dual camera parameter information is including but not limited to: two photosurfaces of dual camera
Dimension information, the distance between two photosurfaces of dual camera information and dual camera two senses
Light identity distance is with a distance from corresponding camera lens photocentre.
Further, in this step, according to image-forming information and dual camera parameter information, determine determinand
The mode of the physical length of body includes:
Mode one:
Transfer the thing based on dual camera building in advance, mirror, as analytic geometry model；
Based on described image-forming information and dual camera parameter information, solve to be measured in described analytic geometry model
The extreme coordinates of object, according to extreme coordinates, ask for the physical length of object under test.
Wherein, two ways is included according to the physical length that extreme coordinates ask for object under test, be respectively as follows:
First, directly ask for the distance between two extreme coordinates points；Second, ask for the ordinate of two end points
Range difference, in addition it is also necessary to be modified to this range difference, correction mechanism is specific as follows under which:
Obtain the entity apparatus of measurement object length and the angle theta of horizontal plane；
Based on described angle theta, the range difference obtaining is modified it may be assumed that revised object length=
Range difference/sin (θ).
Further, in the present embodiment, described thing based on dual camera, mirror, as analytic geometry
Model is preferably:
(that is: X direction is perpendicular to two of dual camera imagings parallel to the direction of light path for X direction
Face)；
Y direction is perpendicular to the direction of light path；
The origin of coordinates is to be capable of determining that on the camera lens photocentre coordinate and two imaging surfaces of dual camera
The origin of coordinates that the extreme coordinates of picture set for principle.
Wherein, the center between the position of the origin of coordinates is preferably but not limited to as two imaging surfaces of dual camera
Position.
Mode two:
According to described image-forming information and dual camera parameter information, to the triangle being made up of picture and camera lens photocentre
Shape and carry out similar calculating by the triangle that thing and camera lens photocentre form, obtains the actual (tube) length of object under test
Degree.It should be noted that the enforcement of which need to rely on a precondition it may be assumed that object under test
Parallel with two imaging surfaces of dual camera.
In sum it is known that the method for the invention need not know the length of certain object of reference, only need to enter
Preview mode just can complete to survey high operation, meets the need that user measures object length whenever and wherever possible
Ask, improve the experience of user.
Embodiment two
The embodiment of the present invention provides a kind of method that utilization dual camera measures object length, and it is from using double
The principle angle of realizing that camera measures object length is set out, and the method for the invention is explained
State so as to can be better described the present invention offer method implement process.
As shown in Fig. 2 being the imaging schematic diagram of dual camera, what in figure " photosurface " represented is exactly into
Image plane；" object " is the object being actually needed measurement；(t1, b1) is the top edge of photosurface
Edge bottom, (t2, b2) is similar to；(pt1, pb1) refers to object institute on photosurface 1
The top edge of imaging and bottom edge, (pt2, pb2) is similar to；(o1, o2) refers to camera lens
Center.
Based on the imaging schematic diagram described in Fig. 2, if photosurface " parallel with " object ", can set up
Plane right-angle coordinate with the center in two photosurface spaces as initial point, specifically as shown in Figure 3.
Coordinate due to the coordinate points in Fig. 3 can be readily available, so the length of object is also not difficult
Obtain.If the gap length between photosurface is d (known)；Photosurface 1,2 width is d1 respectively,
D2 (known)；The lower-bound-distance photosurface lower edge of the picture of the object on photosurface 1 is b1 (known), thing
The upper bound of the picture of body is t1 (known) apart from photosurface upper edge；Under the picture of the object on photosurface 2
Boundary is b2 (known) apart from photosurface lower edge, the upper bound of the picture of object apart from photosurface upper edge be t2 (
Know)；Photosurface 1 is to camera lens 1 apart from f1 (known)；Photosurface 2 is to camera lens 2 apart from f2 (known).
The intersection point of l1, l3 is exactly the object upper bound, and the intersection point of l2, l4 is exactly object lower bound.Can by analytic geometry knowledge
To obtain the physical length of object.
Specifically, in Fig. 3,
pb1With o1Group is in line l1；pt1With o1Group is in line l2；pb2With o2Group is in line l3；pt2With o2
Group is in line l4；l1With l3The ordinate of joining is object upper bound y1；l2With l4The ordinate of joining is
Object lower bound y2；y1-y2Represent object length:
The present invention considers to be difficult to accurately ensure that mobile phone is parallel with object, by adjusting when measurement
Obtain the angle of mobile phone and horizontal plane with the gyro sensor inside mobile phone, then by calculated length
Angle value can be modified to result of calculation divided by sin (θ).
Above-mentioned is to calculate testee length by way of analytic geometry model, and the present invention does not uniquely limit
Determine to carry out length computation by the way, alternatively, as shown in figure 4, former for the imaging of dual camera
Reason figure.
In Fig. 4, " photosurface " is parallel with " object ", and p1 represents projection in photosurface 1 for the object
Length；P2 represents projected length in photosurface 2 for the object；Photosurface 1 is to camera lens 1 apart from f1；Sense
Light face 2 is to camera lens 2 apart from f2；Assume object length x；Object is to camera apart from y.According to phase
Have like Triangle Principle:
The length of object not only can be obtained using which, can also obtain object from photographer away from
From.It should be noted that the enforcement of which need to rely on a precondition it may be assumed that object under test
Parallel with two imaging surfaces of dual camera.
Embodiment three
The embodiment of the present invention provides a kind of terminal, and this terminal comprises dual camera, as shown in figure 5, described
Terminal specifically includes:
Information acquisition module 510, for determining object under test in preview screen, and obtains described to be measured
Image-forming information on two imaging surfaces of dual camera for the object；
Message processing module 520, for according to described image-forming information and dual camera parameter information, determining
The physical length of object under test.
Based on said structure framework and implementation principle, be given below under the above constitution is several concrete and excellent
Select embodiment, in order to refine and to optimize the function of terminal of the present invention, so that the reality of the present invention program
Apply more convenient, accurately.Specifically related to following content:
In the present embodiment, described information processing module 520, specifically for transfer build in advance based on double
The thing of camera, mirror, as analytic geometry model, based on described image-forming information and dual camera parameter
Information, solves the extreme coordinates of object under test in described analytic geometry model, according to extreme coordinates, asks for
The physical length of object under test；Or, when object under test is parallel with two imaging surfaces of dual camera,
According to described image-forming information and dual camera parameter information, to the triangle being made up of picture and camera lens photocentre and
Similar calculating is carried out by the triangle that thing and camera lens photocentre form, obtains the physical length of object under test.
Wherein, the thing based on dual camera, mirror, as analytic geometry model be preferably:
X direction is parallel to the direction of light path；
Y direction is perpendicular to the direction of light path；
The origin of coordinates is to be capable of determining that on the camera lens photocentre coordinate and two imaging surfaces of dual camera
The origin of coordinates that the extreme coordinates of picture set for principle.
Realize under principle above-mentioned, below to user using terminal described in the present embodiment carry out object survey high when
Occupation mode illustrate, certainly, the introduction that mode is used as described below is a kind of exemplary illustration, and
It is not used in unique restriction present invention.Specifically, after user opens camera entrance preview mode:
The first step, clicks on the exposal model in the lower right corner, specifically as shown in Figure 6.
Second step, Eject mode selection interface, select " survey height mode ", specifically as shown in Figure 7.
3rd step, enters and surveys height mode, clicks on the object needing measurement, specifically as shown in Figure 8.
4th step, system automatic decision, provide the profile of object, if this profile of being not intended to, can
Drag profile border with manual, modify, finally click on confirming button, specifically as shown in Figure 9.
5th step, system pop-up dialogue box, the length information of display object, specifically as shown in Figure 10.
In summary, the present invention need not know the length of certain object of reference, need not take pictures, and only need to enter pre-
Pattern of looking at just can complete to survey high operation, meet the demand that user is taken pictures whenever and wherever possible, improve
The experience of user.
Obviously, those skilled in the art can carry out various changes and modification without deviating from this to the present invention
The spirit and scope of invention.So, if these modifications of the present invention and modification belong to right of the present invention and want
Ask and its equivalent technologies within the scope of, then the present invention is also intended to comprise these and changes and modification.
Claims (10)
1. a kind of utilization dual camera measures the method for object length it is characterised in that including:
Object under test is determined in preview screen；
Obtain image-forming information on two imaging surfaces of dual camera for the described object under test；
According to described image-forming information and dual camera parameter information, determine the physical length of object under test.
2. the method for claim 1 is it is characterised in that described take the photograph with double according to image-forming information
As head parameter information, determine the physical length of object under test, comprising:
Transfer the thing based on dual camera building in advance, mirror, as analytic geometry model；
Based on described image-forming information and dual camera parameter information, solve to be measured in described analytic geometry model
The extreme coordinates of object, according to described extreme coordinates, ask for the physical length of object under test.
3. method as claimed in claim 2 it is characterised in that described thing based on dual camera,
Mirror, as analytic geometry model be:
X direction is parallel to the direction of light path；
Y direction is perpendicular to the direction of light path；
The origin of coordinates is to be capable of determining that on the camera lens photocentre coordinate and two imaging surfaces of dual camera
The origin of coordinates that the extreme coordinates of picture set for principle.
4. method as claimed in claim 3 is it is characterised in that the described origin of coordinates is: double shootings
Center between two imaging surfaces of head.
5. the method for claim 1 is it is characterised in that described take the photograph with double according to image-forming information
As head parameter information, determine the physical length of object under test, comprising:
When object under test is parallel with two imaging surfaces of dual camera, taken the photograph with double according to described image-forming information
As head parameter information, to the triangle being made up of picture and camera lens photocentre and be made up of thing and camera lens photocentre three
The angular physical length carrying out similar calculating, obtaining object under test.
6. a kind of terminal, described terminal comprises dual camera it is characterised in that described terminal also includes:
Information acquisition module, for determining object under test in preview screen, and obtains described object under test
Image-forming information on two imaging surfaces of dual camera；
Message processing module, for according to described image-forming information and dual camera parameter information, determining to be measured
The physical length of object.
7. terminal as claimed in claim 6 is it is characterised in that described information processing module, specifically
For transfer the thing based on dual camera building in advance, mirror, as analytic geometry model, based on institute
State image-forming information and dual camera parameter information, solve the end points of object under test in described analytic geometry model
Coordinate, according to described extreme coordinates, asks for the physical length of object under test.
8. terminal as claimed in claim 7 it is characterised in that described thing based on dual camera,
Mirror, as analytic geometry model be:
X direction is parallel to the direction of light path；
Y direction is perpendicular to the direction of light path；
The origin of coordinates is to be capable of determining that on the camera lens photocentre coordinate and two imaging surfaces of dual camera
The origin of coordinates that the extreme coordinates of picture set for principle.
9. terminal as claimed in claim 8 is it is characterised in that the described origin of coordinates is: double shootings
Center between two imaging surfaces of head.
10. terminal as claimed in claim 6 is it is characterised in that described information processing module, specifically
For when object under test is parallel with two imaging surfaces of dual camera, being taken the photograph with double according to described image-forming information
As head parameter information, to the triangle being made up of picture and camera lens photocentre and be made up of thing and camera lens photocentre three
The angular physical length carrying out similar calculating, obtaining object under test.
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| CN201510409496.2A CN106352797B (en) | 2015-07-13 | 2015-07-13 | Method and terminal for measuring length of object by using double cameras |
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| CN108195288A (en) * | 2017-12-28 | 2018-06-22 | 上海传英信息技术有限公司 | A kind of dimension of object measuring method and measuring device based on intelligent terminal |
| CN109274785A (en) * | 2017-07-17 | 2019-01-25 | 中兴通讯股份有限公司 | A kind of information processing method and mobile terminal device |
| CN109682312A (en) * | 2018-12-13 | 2019-04-26 | 上海集成电路研发中心有限公司 | A kind of method and device based on camera measurement length |
| WO2020211626A1 (en) * | 2019-04-15 | 2020-10-22 | Oppo广东移动通信有限公司 | Method and apparatus for measuring geometric parameter of object, and terminal |
| CN112066876A (en) * | 2020-08-27 | 2020-12-11 | 武汉大学 | Method for rapidly measuring object size by using mobile phone |
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| CN106352797B (en) | 2020-05-19 |
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