CN102967264A - Method for obtaining shrub branch length based on digital image technology - Google Patents
Method for obtaining shrub branch length based on digital image technology Download PDFInfo
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Abstract
The invention relates to a method for obtaining a shrub branch length based on a digital image technology. A device capable of accurately obtaining plant fractal characteristics is designed through the method by using digital images obtained by a digital camera, a computer image processing method and a fractal characteristic method, and a method for obtaining a shrub branch length according to the dimensions of a plant fractal box is given out; and the plant branch length can be quickly, completely and accurately obtained through the analysis of the image fractal characteristics. The method provided by the invention provides a novel train of thought to quantitatively research the growth dynamic characteristics of an over-ground part of a desert shrub, has a great significance to the promotion of the development and completion for accurately and quickly obtaining the dynamic growth monitoring statuses of desert plants in the wild, and overcomes the shortcoming in a method for continuously measuring the growth of over-ground organs of plants.
Description
Technical field
The present invention relates to a kind of method based on digital image technical Analysis shrub fractal characteristic acquisition plant branching length, dynamic non-destructive investigation has important practical value to the method for plant growth.
Background technology
Deserta is as the important component part of desert ecosystem, its growth and development process is to response and the adaptation of desert habitat, especially ermophyte grows to response and the adaptation of moisture condition, and is significant to the research of the ecological recovery of arid biogeographic zone desert ecosystem and vegetation succession.Therefore, the growth behavioral characteristics of research ermophyte and be that it is badly in need of key problem of solving to the response that habitat conditions changes.At present, the destructive employing adopted in the investigation of ermophyte mostly, continuous growth behavioral characteristics that can't each organoid of Obtaining Accurate plant, and fractal characteristic can be used for characterizing and has the self-similarity characteristics object at Spatial Variation and part quantitative characteristic.At present, fractal characteristic has extensively adopted and has characterized plant shoot and root system in the development characteristics in space, utilizes the fractal characteristic of plant and the correlativity between the phytobiology feature, just can obtain comparatively easily the dynamic change that ermophyte grows.
The present invention is take Obtaining Accurate plant shoot branch length as purpose, digital image, Computer Image Processing method and the fractal characteristic method of utilizing digital camera to obtain, but designed the device of Obtaining Accurate plant fractal characteristic, and provided the method that obtains plant branching length according to the plant fractal box.The method of the invention provides a kind of new thinking and method for quantitative examination desert shrub overground part growth behavioral characteristics.
Summary of the invention
The object of the invention is to, a kind of method of obtaining the shrub branch length based on the digital image technology is provided, the digital image that the method utilizes digital camera to obtain, Computer Image Processing and fractal characteristic method, but designed the device of Obtaining Accurate plant fractal characteristic, and provided the method that obtains plant branching length according to the plant fractal box, by the analysis to the image fractal characteristic, fast, can't harm and obtain accurately plant branching length, the method of the invention provides a kind of new thinking for quantitative examination desert shrub overground part growth behavioral characteristics, for promoting development and improvement accurately open-air and quick obtaining ermophyte growth dynamic monitoring significant, overcome the shortcoming that exists in the existing plant shoot organ growth method for continuously measuring.
A kind of method of obtaining the shrub branch length based on the digital image technology of the present invention, related device is digital camera, telescopic tripod in the method, the demarcation thing of plant, white background plate and the known length of being taken pictures forms, and concrete operations are carried out according to the following steps:
A, the plant (3) that at first will take are placed between the digital camera (1) and white background plate (4) that has fixed, and adjust shooting height, distance and the angle of digital camera (1), carry out the shooting of digital image, obtain the plant photographic images;
B, the conventional image processing software of employing carry out cutting to the image that obtains, and are converted into binary map;
C, based on the definition of box counting dimension in the fractal theory of routine, adopt conventional VC++ in the compiling of the programmed method realization plant fractal characteristic parameter calculation procedure of windows platform Based on Object-Oriented Technology, utilize the calculation procedure that compiles to obtain fractal dimension and the intercept of this image;
D, according to the branch length of actual measurement and fractal dimension and the intercept match equation of linear regression of branch, utilize this equation can obtain having the branch length of the kindred plant of different fractal characteristics.
Digital camera in the device described in the step a (1) is fixed on the telescopic tripod (2), the plant (3) of being taken pictures is fixed between digital camera (1) and the white background plate (4), is provided with the demarcation thing (5) of known length at white background plate (4).
Plant is 360 ° of rotations in the device described in the step a, and digital camera (1) is for moving up and down, and white background plate (4) is for moving forward and backward.
The shooting height of digital camera in the device described in the step a (1) needs to adjust according to the height of the plant (3) of being taken pictures, and shooting angle is that 0-360 ° of any one angle, the plant (3) of being taken pictures and the distance between the white background plate (4) are 100cm.
Of the present inventionly a kind ofly obtain the method for shrub branch length based on the digital image technology, the related device of the method is to comprise the target plant that will measure, can take pictures continuously and obtain the digital camera of plant image, fixing five parts of demarcation thing of telescopic tripod, white background plate and the known length of camera; Target plant tested in the method is fixed, plant can 360 ° of rotations, but can not all around move up and down, digital camera is the distance that can move up and down to adjust between shooting height and the object, the white background plate can move forward and backward in order to the distance between adjustment and the shooting plant, and background board can be according to the hat width of cloth size and the selection of highly carrying out size of the plant that is taken; In addition, must enclose the scale of known exact length on the background board, in order to calculate branch length according to the plant branching fractal characteristic parameter.Apparatus structure in the method for the present invention is simple, makes and operate also to be easier to.
A kind of method of obtaining the shrub branch length based on the digital image technology of the present invention, the plant that the method at first will be taken is placed between the digital camera and white background plate that has fixed, adjust suitable shooting height and distance, carry out the shooting of digital image;
Utilize and adopt image processing software that the image that obtains is carried out cutting, be converted into binary map; Definition based on box counting dimension in the fractal theory, if the length of side of image is the L(image length, the pixel that comprises some), take r as the little foursquare length of side (its value is from 1 to L), calculate the foursquare quantity take the length of side as r that different r value situation hypographs intercepts, and be designated as N (r); Along with the variation of r from 1 to L, N (r) can get a series of different value, and the value of N (r) increases gradually along with the minimizing of r; After obtaining r and N (r) value, respectively with log (r) and log (N (r)) as independent variable and dependent variable, carry out the linear regression analysis of log (r) and log (N (r)), obtain equation:
log(N(r))＝-F
dlog(r)+log(k)
In the formula: K is definite value (intercept), F
dBe the fractal dimension (slope) of the plant of trying to achieve; F
dSubtle change generally can reflect and the rapid variation of phytomorph can be used as the description of different growth conditionss and age plant branching and growth characteristics;
Calculate plant fractal characteristics value F
dBe to adopt VC++ in the compiling of the programmed method realization plant fractal characteristic parameter calculation procedure of windows platform Based on Object-Oriented Technology, utilize the program that compiles to obtain fractal dimension and the intercept of the corresponding plant branching of image;
According to the verification experimental verification result, showing does not have preferably correlativity between fractal dimension and the plant branching length, and has significant linear dependence between fractal intercept and the plant branching length; Branch length and fractal intercept match equation of linear regression according to actual measurement utilize this equation just can have in order to calculating the branch length of different fractal characteristic kindred plants.
Description of drawings
Fig. 1 installs synoptic diagram among the present invention.
Embodiment
Embodiment 1: the fractal characteristic of measuring plant under different shooting distances and the angle:
The plant 3 sacsaouls 2 age seedling plant that at first will take is placed between the digital camera 1 and white background plate 4 that has fixed, adjust digital camera 1, the image that different shooting distances and shooting angle gather respectively 2 age of sacsaoul seedling plant is set, carries out obtaining of sacsaoul 2 age seedling plant image by the table 1 different shooting distances of setting and shooting angle;
The level set of the different factors of table 1 and the setting of taking combination
After various combination is set the end of taking pictures, each branch length of seedling plant is measured to 2 age of plant sacsaoul, to obtain the correlativity between 2 age of the sacsaoul seedling plant fractal characteristic parameter value and 2 age of sacsaoul seedling plant branch length under different shooting distances and the angle;
Utilize image processing and analyzing software that the image that obtains is carried out cutting, be converted into binary map;
Utilize the plant fractal characteristic calculation procedure of compiling to carry out the calculating (fractal dimension and intercept) of the corresponding plant fractal characteristic parameter of image;
According to the fractal intercept match equation of linear regression under branch length and different shooting distances, the angle of actual measurement, just can obtain best shooting distance and shooting angle according to the related coefficient of each equation.
Embodiment 2: the fractal characteristic of measuring plant under different shooting distances and the shooting height:
Lay filming apparatus with embodiment 1 same procedure, utilize 2 age of identical sacsaoul seedling plant, different shooting distances and shooting height are set gather respectively 2 age of sacsaoul seedling plant image, carry out obtaining of Haloxylon Species of Seedling image by the table 1 different shooting distances of setting and shooting height;
Various combination set take pictures finish after, each branch length of plant is measured, to obtain the correlativity between 2 age of the sacsaoul seedling plant fractal characteristic parameter value and sacsaoul branch length under different shooting distances and the angle;
Utilize image processing software that the image that obtains is carried out cutting, be converted into binary map;
Utilize the plant fractal characteristic calculation procedure of compiling to carry out the calculating (fractal dimension and intercept) of the corresponding plant fractal characteristic parameter of image;
According to the fractal intercept match equation of linear regression under branch length and different shooting distances, the height of actual measurement, just can obtain best shooting distance and shooting height according to the related coefficient of each equation.
Claims (4)
1. method of obtaining the shrub branch length based on the digital image technology, it is characterized in that the related device of the method is digital camera, telescopic tripod, the demarcation thing of plant, white background plate and the known length of being taken pictures forms, concrete operations are pressed step and are carried out:
A, the plant (3) that at first will take are placed between the digital camera (1) and white background plate (4) that has fixed, and adjust shooting height, distance and the angle of digital camera (1), carry out the shooting of digital image, obtain the plant photographic images;
B, conventional image analysis software or the instrument of employing carry out cutting to the image that obtains, and then are converted into binary map;
C, based on the definition of box counting dimension in the fractal theory of routine, adopt conventional VC++ to realize obtaining of plant fractal characteristic parameter at the programmed method of windows platform Based on Object-Oriented Technology, the calculation procedure of operation compiling obtains fractal dimension and the intercept of this image;
D, set up the linear regression analysis equation according to fractal dimension and the intercept of branch length of actual measurement, utilize this equation can obtain the total length that the phase kindred plant has the plant branching of different fractal characteristics.
2. method according to claim 1, it is characterized in that digital camera in the device described in the step a (1) is fixed on the telescopic tripod (2), the plant (3) of being taken pictures is fixed between digital camera (1) and the white background plate (4), is provided with the demarcation thing (5) of known length at white background plate (4).
3. method according to claim 1 is characterized in that plant is 360 ° of rotations in the device described in the step a, and digital camera (1) is for moving up and down, and white background plate (4) is for moving forward and backward.
4. method according to claim 1, the shooting height that it is characterized in that digital camera in the device described in the step a (1) needs to adjust according to the height of the plant (3) of being taken pictures, and shooting angle is that 0-360 ° of any one angle, the plant (3) of being taken pictures and the distance between the white background plate (4) are 100cm.
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| CN103308384A (en) * | 2013-05-06 | 2013-09-18 | 杭州电子科技大学 | Device for measuring anisotropism of sheet metal |
| CN103412141A (en) * | 2013-08-29 | 2013-11-27 | 北京农业信息技术研究中心 | Young grape sprout growing rate measuring system and method based on machine vision |
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