CN106123784B - A kind of method and device measuring length - Google Patents
A kind of method and device measuring length Download PDFInfo
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- CN106123784B CN106123784B CN201610584390.0A CN201610584390A CN106123784B CN 106123784 B CN106123784 B CN 106123784B CN 201610584390 A CN201610584390 A CN 201610584390A CN 106123784 B CN106123784 B CN 106123784B
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- length
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- 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
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
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- Length Measuring Devices By Optical Means (AREA)
Abstract
The present invention is applicable in field of computer technology, provides a kind of method and device for measuring length, which comprises obtains primary standard substance in distance d, number of corresponding pixels n in screen shared by the length of primary standard substance；Obtain pixel number N in screen shared by the distance D of determinand and the length of determinand；The distance D is matched with the distance d, obtains number of corresponding pixels n；The length l of pixel number N and the primary standard substance in screen shared by the length of the pixel number n, the determinand that are obtained according to matching, obtains the length L of the determinand.The present invention obtains pixel number corresponding to the length of primary standard substance under different distance, distance according to determinand apart from camera, it finds and primary standard substance is in same corresponding pixel number under, thus the length for calculating determinand improves the convenience, measurement accuracy and reduction measurement error of measurement.
Description
Technical field
The invention belongs to field of computer technology more particularly to a kind of method and devices for measuring length.
Background technique
There is the demand for having measurement object length under many scenes in life, usual mode is to go to survey using a ruler
Amount, but in Internet era, mobile terminal is the indispensability of each family, and the use of mobile phone has been covered greatly
Crowd, mutually confrontational ruler have been difficult to find.
Currently with the acceleration sensing that the method that mobile terminal device measures object length is built in mobile terminal
Device and timer calculate object length by accelerating mobile mobile terminal, but this method has many drawbacks, such as:
Quick moving device is had to when measuring some object to obtain acceleration, and when measuring linear distance error compared with
It greatly, there are also maximum one limitation is had to close to measured object because not can guarantee user is also linear moving apparatus
Body carries out traverse measurement.
Summary of the invention
The purpose of the present invention is to provide a kind of method and devices for measuring length, it is intended to which solution needs in the prior art
Mobile terminal device measures the problem that caused measurement method is cumbersome, measurement error is big on determinand.
On the one hand, the present invention provides a kind of method for measuring length, the method includes the following steps:
Primary standard substance is obtained in distance d, number of corresponding pixels n, described in screen shared by the length of the primary standard substance
Primary standard substance is the object of known length l, and the distance d is distance of the benchmark object to camera；
Obtaining pixel number N, the distance D in screen shared by the distance D of determinand and the length of the determinand is
Determinand to camera distance；
The distance D is matched with the distance d, obtains number of corresponding pixels n；
Pixel number N in screen shared by the length of the pixel number n, the determinand that are obtained according to matching,
And the length l of the primary standard substance, obtain the length L of the determinand.
On the other hand, the present invention provides a kind of device for measuring length, described device includes:
Pixel number n acquiring unit, for obtaining primary standard substance in distance d, screen shared by the length of the primary standard substance
Middle number of corresponding pixels n, the primary standard substance are the object of known length l, the distance d be benchmark object to camera away from
From；
Pixel number N acquiring unit, for obtaining screen shared by the distance D of determinand and the length of the determinand
Middle pixel number N, the distance D are distance of the determinand to camera；
Matching unit obtains number of corresponding pixels n for matching the distance D with the distance d；With
And
Determinand length computation unit, the length of the pixel number n, the determinand for being obtained according to matching
The length l of pixel number N and the primary standard substance in shared screen, obtains the length L of the determinand.
In embodiments of the present invention, pixel number corresponding to the length of primary standard substance is obtained, under different distance with this
As matched data, when measuring object length, distance according to determinand apart from camera, find and primary standard substance equally away from
From lower corresponding pixel number, the length of determinand is thus calculated, the beneficial effect is that without passing through mobile terminal
Equipment obtains the length of determinand, improves the convenience, measurement accuracy and reduction measurement error of measurement.
Detailed description of the invention
Fig. 1 is the implementation flow chart of the method for the measurement length that the embodiment of the present invention one provides；And
Fig. 2 is the structural schematic diagram of the device of measurement length provided by Embodiment 2 of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Specific implementation of the invention is described in detail below in conjunction with specific embodiment:
Embodiment one:
Fig. 1 shows the implementation flow chart of the method for the measurement length of the offer of the embodiment of the present invention one, for ease of description,
Only parts related to embodiments of the present invention are shown, and details are as follows:
In step s101, primary standard substance is obtained in distance d, corresponding pixel in screen shared by the length of primary standard substance
Number n.
In embodiments of the present invention, primary standard substance is the object of known length l, and distance d is distance of the benchmark object to camera,
In addition, needs of the user according to itself, can choose the object of suitable length as primary standard substance, for example, it is desired to be frequently necessary to survey
Longer object is measured, can choose longer object as primary standard substance.
In embodiments of the present invention, it using the image of the camera acquisition primary standard substance on terminal device, is shown in terminal and sets
On standby screen, and by the way that range sensor is arranged on the terminal device, reference object distance is obtained with a distance from camera, thus may be used
To obtain at different distance d number of corresponding pixels n in screen shared by the length of corresponding primary standard substance, one by one by these
Corresponding data are stored, to calculate determinand length.
Further, it in order to get more complete data, needs to get to the greatest extent corresponding to different distance d
Number of corresponding pixels n in screen shared by the length of primary standard substance, can realize as follows:
Starting captures when successively the pixel number in screen shared by the length from primary standard substance is maximum value, until primary standard substance
Pixel number in screen shared by length is ended when being minimum value；Or
Starting captures when successively the pixel number in screen shared by the length from primary standard substance is minimum value, until primary standard substance
Pixel number in screen shared by length is ended when being maximum value.
Specifically, above two acquisition number of corresponding pixels n in screen shared by the length of primary standard substance in distance d
Method is to realize that this also depends on that user is obtaining by obtaining the critical value that primary standard substance is presented on the screen using camera
Use habit when data, for example, the pixel of corresponding display is a on the screen for the mode for using transverse screen to be acquired
Number can be more than the mode being acquired using vertical screen.Therefore, in order to improve the integralities of data, and to improve subsequent measurement smart
Degree can use the acquisition mode of transverse screen.
In step s 102, pixel number N in screen shared by the distance D of determinand and the length of determinand is obtained.
Specifically, the distance D of determinand is obtained according to range sensor；
The coordinate position of touch point on screen is obtained, to determine the computer capacity of determinand length；
According to the computer capacity of determinand length, pixel number N in screen shared by determinand length is calculated.
In embodiments of the present invention, after getting the data of primary standard substance, the length for measuring determinand can be started, passed through
Range sensor on terminal device obtains determinand to the distance of camera, obtains distance D；At this point, camera collect to
The image of object is surveyed, and is shown on the screen of terminal device, in order to increase the accuracy of measurement, calculation amount is reduced and quickly looks for
To computing object (i.e. determinand), the computer capacity chosen and need the length to be measured measured is clicked on the screen by user, by
This is accurately calculated in screen shared by determinand length according to the computer capacity for the length to be measured that the needs that user chooses measure
Pixel number N.
Further, the coordinate position of touch point on screen is obtained, to determine the computer capacity of determinand length, specifically
Are as follows:
The first touch point is detected on the screen, and obtains the coordinate position of the first touch point；
The second touch point is detected on the screen, and obtains the coordinate position of the second touch point；
According to the coordinate position of the first touch point and the coordinate position of the second touch point, the calculating of determinand length is determined
Range.
Specifically, when user chooses the computer capacity for needing the length to be measured measured on the screen, can click on is needed
The starting point and terminal for wanting measurement length when needing the starting point of measurement length when the user clicks, detect the first touch point on the screen,
And the coordinate position of the first touch point is obtained, when needing the terminal of measurement length when the user clicks, the second touching is detected on the screen
It touches a little, and obtains the coordinate position of the second touch point；According to the coordinate position of the first touch point and the coordinate of the second touch point
Position determines the computer capacity of determinand length.
In step s 103, distance D is matched with distance d, obtains number of corresponding pixels n.
In embodiments of the present invention, it when getting the distance D of determinand, is carried out with the data of the primary standard substance stored before
Matching, finds the equal distance d with determinand distance D, when being matched to equal distance d, obtains the primary standard substance in distance d
Length shared by number of corresponding pixels n in screen.
In step S104, pixel in screen shared by the length of the pixel number n, determinand that are obtained according to matching
The length l of number N and primary standard substance, obtain the length L of determinand.
In embodiments of the present invention, the calculation formula of the length L of determinand are as follows: the length of determinand
In embodiments of the present invention, pixel number corresponding to the length of primary standard substance is obtained, under different distance with this
As matched data, when measuring object length, distance according to determinand apart from camera, find and primary standard substance equally away from
From lower corresponding pixel number, the length of determinand is thus calculated, without obtaining determinand by mobile terminal device
Length, improve the convenience of measurement, measurement accuracy and reduce measurement error.
Those of ordinary skill in the art will appreciate that implement the method for the above embodiments be can be with
Relevant hardware is instructed to complete by program, the program can be stored in a computer readable storage medium,
The storage medium, such as ROM/RAM, disk, CD.
Embodiment two:
Fig. 2 shows the structural schematic diagrams of the device of measurement length provided by Embodiment 2 of the present invention, for ease of description,
Only parts related to embodiments of the present invention are shown.In embodiments of the present invention, the device for measuring length includes: pixel
Number n acquiring unit 21, pixel number N acquiring unit 22, matching unit 23 and determinand length computation unit 24, in which:
Pixel number n acquiring unit 21, for obtaining primary standard substance in distance d, in screen shared by the length of primary standard substance
Number of corresponding pixels n, primary standard substance are the object of known length l, and distance d is distance of the benchmark object to camera.
In embodiments of the present invention, primary standard substance is the object of known length l, and distance d is distance of the benchmark object to camera,
In addition, needs of the user according to itself, can choose the object of suitable length as primary standard substance, for example, it is desired to be frequently necessary to survey
Longer object is measured, can choose longer object as primary standard substance.
In embodiments of the present invention, it using the image of the camera acquisition primary standard substance on terminal device, is shown in terminal and sets
On standby screen, and by the way that range sensor is arranged on the terminal device, reference object distance is obtained with a distance from camera, thus may be used
To obtain at different distance d number of corresponding pixels n in screen shared by the length of corresponding primary standard substance, one by one by these
Corresponding data are stored, to calculate determinand length.
Wherein, pixel number n acquiring unit 21 includes:
First acquisition unit, for successively from the pixel number in screen shared by the length of primary standard substance be maximum value
Begin to capture, until the pixel number in screen shared by the length of primary standard substance is ended when being minimum value；And
Second acquisition unit, for successively from the pixel number in screen shared by the length of primary standard substance be minimum value
Begin to capture, until the pixel number in screen shared by the length of primary standard substance is ended when being maximum value.
Specifically, above two acquisition number of corresponding pixels n in screen shared by the length of primary standard substance in distance d
Method is to realize that this also depends on that user is obtaining by obtaining the critical value that primary standard substance is presented on the screen using camera
Use habit when data, for example, the pixel of corresponding display is a on the screen for the mode for using transverse screen to be acquired
Number can be more than the mode being acquired using vertical screen.Therefore, in order to improve the integralities of data, and to improve subsequent measurement smart
Degree can use the acquisition mode of transverse screen.
Pixel number N acquiring unit 22, for obtaining in screen shared by the distance D of determinand and the length of determinand
Pixel number N, distance D are distance of the determinand to camera.
In the present embodiment, pixel number N acquiring unit 22 includes:
Distance acquiring unit, for obtaining the distance D of determinand according to range sensor；
Coordinate position acquiring unit, for obtaining the coordinate position of touch point on the screen, with the determination determinand
The computer capacity of length；And
Computing unit calculates screen shared by the determinand length for the computer capacity according to the determinand length
Middle pixel number N.
In embodiments of the present invention, after getting the data of primary standard substance, the length for measuring determinand can be started, passed through
Range sensor on terminal device obtains determinand to the distance of camera, obtains distance D；At this point, camera collect to
The image of object is surveyed, and is shown on the screen of terminal device, in order to increase the accuracy of measurement, calculation amount is reduced and quickly looks for
To computing object (i.e. determinand), the computer capacity chosen and need the length to be measured measured is clicked on the screen by user, by
This is accurately calculated in screen shared by determinand length according to the computer capacity for the length to be measured that the needs that user chooses measure
Pixel number N.
Further, coordinate position acquiring unit includes:
First coordinate position acquiring unit for detecting the first touch point on the screen, and obtains the seat of the first touch point
Cursor position；
Second coordinate position acquiring unit for detecting the second touch point on the screen, and obtains the seat of the second touch point
Cursor position；And
Computer capacity determination unit, for according to the coordinate position of the first touch point and the coordinate bit of the second touch point
It sets, determines the computer capacity of determinand length.
Specifically, when user chooses the computer capacity for needing the length to be measured measured on the screen, can click on is needed
The starting point and terminal for wanting measurement length when needing the starting point of measurement length when the user clicks, detect the first touch point on the screen,
And the coordinate position of the first touch point is obtained, when needing the terminal of measurement length when the user clicks, the second touching is detected on the screen
It touches a little, and obtains the coordinate position of the second touch point；According to the coordinate position of the first touch point and the coordinate of the second touch point
Position determines the computer capacity of determinand length.
Matching unit 23 obtains number of corresponding pixels n for matching with distance d distance D.
In embodiments of the present invention, it when getting the distance D of determinand, is carried out with the data of the primary standard substance stored before
Matching, finds the equal distance d with determinand distance D, when being matched to equal distance d, obtains the primary standard substance in distance d
Length shared by number of corresponding pixels n in screen.
Determinand length computation unit 24, the pixel number n for being obtained according to matching, screen shared by the length of determinand
The length l of pixel number N and primary standard substance in curtain, obtains the length L of determinand.
In embodiments of the present invention, the calculation formula of the length L of determinand are as follows: the length of determinand
In embodiments of the present invention, each unit for measuring the device of length can realize by corresponding hardware or software unit,
Each unit can be independent soft and hardware unit, also can integrate as a soft and hardware unit, herein not to limit this hair
It is bright.The embodiment of the device each unit specifically refers to the description of previous embodiment one, and details are not described herein.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (10)
1. a kind of method for measuring length, which is characterized in that the method includes the following steps:
Primary standard substance is obtained in distance d, number of corresponding pixels n in screen shared by the length of the primary standard substance, to obtain
It number of corresponding pixels and is stored in screen shared by the length of corresponding primary standard substance under different distances, the primary standard substance is
Know that the object of length l, the distance d are distance of the benchmark object to camera；
When receiving the request measured to determinand length, the distance D of determinand and the length of the determinand are obtained
Pixel number N in shared screen, the distance D are distance of the determinand to camera；
The distance D is matched with the distance d, obtains number of corresponding pixels n；
Shared by the length of the pixel number n, the determinand that are obtained according to matching in screen pixel number N and
The length l of the primary standard substance obtains the length L of the determinand.
2. the method as described in claim 1, which is characterized in that the acquisition primary standard substance is in distance d, the length of the primary standard substance
The step of spending number of corresponding pixels n in shared screen, comprising:
Starting captures when successively the pixel number in screen shared by the length from the primary standard substance is maximum value, until the benchmark
Pixel number in screen shared by the length of object is ended when being minimum value；Or
Starting captures when successively the pixel number in screen shared by the length from the primary standard substance is minimum value, until the benchmark
Pixel number in screen shared by the length of object is ended when being maximum value.
3. the method as described in claim 1, which is characterized in that the length of the distance D for obtaining determinand and the determinand
The step of spending pixel number N in shared screen, comprising:
The distance D of determinand is obtained according to range sensor；
The coordinate position of touch point on the screen is obtained, with the computer capacity of the determination determinand length；
According to the computer capacity of the determinand length, pixel number N in screen shared by the determinand length is calculated.
4. method as claimed in claim 3, which is characterized in that the coordinate position for obtaining touch point on the screen, with
The step of determining the computer capacity of the determinand length, comprising:
The first touch point is detected on the screen, and obtains the coordinate position of first touch point；
The second touch point is detected on the screen, and obtains the coordinate position of second touch point；
According to the coordinate position of first touch point and the coordinate position of the second touch point, the determinand length is determined
Computer capacity.
5. the method as described in claim 1, which is characterized in that the pixel number n, described obtained according to matching
The length l of pixel number N and the primary standard substance in screen shared by the length of determinand, obtains the length L of the determinand
Calculation formula are as follows:
6. a kind of device for measuring length, which is characterized in that described device includes:
Pixel number n acquiring unit is right in screen shared by the length of the primary standard substance for obtaining primary standard substance in distance d
The pixel number n answered, the primary standard substance are the object of known length l, and the distance d is distance of the benchmark object to camera；
Pixel number N acquiring unit, for obtaining picture in screen shared by the distance D of determinand and the length of the determinand
Vegetarian refreshments number N, the distance D are distance of the determinand to camera；
Matching unit obtains number of corresponding pixels n for matching the distance D with the distance d；And
Determinand length computation unit, for according to shared by the length for matching the obtained pixel number n, the determinand
The length l of pixel number N and the primary standard substance in screen, obtains the length L of the determinand.
7. device as claimed in claim 6, which is characterized in that the pixel number n acquiring unit includes:
First acquisition unit, for successively from the pixel number in screen shared by the length of the primary standard substance be maximum value
Begin to capture, until the pixel number in screen shared by the length of the primary standard substance is ended when being minimum value；And
Second acquisition unit, for successively from the pixel number in screen shared by the length of the primary standard substance be minimum value
Begin to capture, until the pixel number in screen shared by the length of the primary standard substance is ended when being maximum value.
8. device as claimed in claim 7, which is characterized in that the pixel number N acquiring unit includes:
Distance acquiring unit, for obtaining the distance D of determinand according to range sensor；
Coordinate position acquiring unit, for obtaining the coordinate position of touch point on the screen, with the determination determinand length
Computer capacity；And
Computing unit calculates picture in screen shared by the determinand length for the computer capacity according to the determinand length
Vegetarian refreshments number N.
9. device as claimed in claim 7, which is characterized in that the coordinate position acquiring unit includes:
First coordinate position acquiring unit for detecting the first touch point on the screen, and obtains first touch point
Coordinate position；
Second coordinate position acquiring unit for detecting the second touch point on the screen, and obtains second touch point
Coordinate position；And
Computer capacity determination unit, for according to the coordinate position of first touch point and the coordinate bit of the second touch point
It sets, determines the computer capacity of the determinand length.
10. device as claimed in claim 6, which is characterized in that the calculation formula of the determinand length computation unit are as follows:
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| CN107504902A (en) * | 2017-08-24 | 2017-12-22 | 广东小天才科技有限公司 | A kind of length measurement method, device, mobile terminal and storage medium |
| CN108304119B (en) * | 2018-01-19 | 2022-10-28 | 腾讯科技（深圳）有限公司 | Object measuring method, intelligent terminal and computer readable storage medium |
| CN110702001A (en) * | 2018-07-10 | 2020-01-17 | 皓琪科技股份有限公司 | Non-contact optical measurement method and system |
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| CN102494616A (en) * | 2011-11-22 | 2012-06-13 | 捷开通讯科技(上海)有限公司 | Length measuring device based on mobile terminal and method thereof |
| CN103063143A (en) * | 2012-12-03 | 2013-04-24 | 苏州佳世达电通有限公司 | Measuring method and system based on image identification |
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| KR101888564B1 (en) * | 2011-12-29 | 2018-08-16 | 삼성전자주식회사 | Depth sensor, method of calculating depth in the same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494616A (en) * | 2011-11-22 | 2012-06-13 | 捷开通讯科技(上海)有限公司 | Length measuring device based on mobile terminal and method thereof |
| CN103063143A (en) * | 2012-12-03 | 2013-04-24 | 苏州佳世达电通有限公司 | Measuring method and system based on image identification |
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