CN105865420A

CN105865420A - Method for estimating crown and fruit yield of fruit tree by using smartphone photographic process

Info

Publication number: CN105865420A
Application number: CN201610172399.0A
Authority: CN
Inventors: 冯仲科; 刘金成; 黄晓东
Original assignee: Beijing Forestry University
Current assignee: Beijing Forestry University
Priority date: 2016-03-24
Filing date: 2016-03-24
Publication date: 2016-08-17

Abstract

The invention discloses a method for estimating the crown and fruit yield of a fruit tree by using a smartphone photographic process. The method comprises the following steps: arranging two fixed-focus smartphones on a vertical baseline, erecting equipment at an appropriate shoot point and carrying out photogrammetry on a to-be-measured fruit tree so as to form stereopairs; calculating corresponding relative object space coordinates of any image point according to the theory of photogrammetry and then extracting and determining the crown diameter and height of the to-be-measured fruit tree and the transverse diameter and vertical height of any fruit; and establishing a total model for fruit yield of the fruit tree and establishing a model for the total yield of fruit tree and the crown diameter and height of the fruit tree through fitting. Thus, the novel method for rapid and accurate determination of the fruit yield of the fruit tree is formed.

Description

A kind of smart mobile phone Photographic technique measures fruit tree hat body and the method for fruit output estimation

One, technical field

The present invention relates to mensuration and the estimating and measuring method of fruit output of a planting fruit-trees hat body, particularly a kind of smart mobile phone is taken the photograph Shadow method measures fruit tree hat body and the method for fruit output estimation.

Two, technical background

Fruit tree is as the one of commodity trees, and the determination of its yield is always a difficult problem, and how to utilize existing skill Art and means carry out an estimation good problem to study especially of output of the fruit tree.For the problem of output of the fruit tree, traditional side Formula is plucked after simply waiting fruit tree fruit maturation really to weigh and is determined output of the fruit tree, and this estimation mode workload is excessive, and cost is relatively Height, and the yield after fruit tree fruit maturation is determined have little significance.

For fruit tree concentrated area, especially large stretch of fruit tree forest zone, traditional output of the fruit tree determines that mode also exists relatively Big deficiency and hysteresis quality, need a kind of quick, practical output of the fruit tree badly and determine method.And the continuous of photogrammetric technology sends out Exhibition, provides a kind of possible for the determination of fruit tree hat body crown diameter and the estimation quick, accurate of output of the fruit tree.

Three, summary of the invention

In order to overcome traditional output of the fruit tree to determine deficiency and the hysteresis quality of existence, study a kind of new quick and precisely estimation The technical method of output of the fruit tree, the present invention proposes a kind of smart mobile phone Photographic technique and measures fruit tree hat body and the side of fruit output estimation Method.

The object of the present invention is achieved like this:

Utilize the smart mobile phone Photographic technique focused that fruit tree hat body and fruit output are carried out rapid and accurate determination, first, choosing Select and properly take the photograph the website erection vertical baseline of arrangement, and on vertical baseline, dispose upper and lower two smart mobile phones, fruit tree to be measured is entered Row is photogrammetric, forms stereogram；Secondly, according to photogrammetry principles, determine relative object coordinates by image space coordinate, Go out the relative object coordinates that any picture point is corresponding；According to coordinate value, determine fruit tree to be measured hat body crown diameter size and fruit tree fruit Yield model；Finally, matching fruit tree overall productivity and hat body crown diameter and the relation of the height of tree, set up estimation models.

This invention has the advantage that with conventional method ratio

1. utilize smart mobile phone that fruit tree hat body and output of the fruit tree are estimated, convenient, flexible, quick and precisely；

2. utilize photogrammetry to measure, the workload of tradition assay method can be greatly reduced, when shortening mensuration Between；

3. output of the fruit tree and fruit tree hat body crown diameter size and the Mathematical Modeling of the height of tree are set up in matching, for the corresponding fruit of estimation later The yield of tree provides methods the most easily.

Four, accompanying drawing explanation:

The present invention is further described with embodiment below in conjunction with the accompanying drawings.

Fig. 1 is vertical baseline photogrammetric equipment schematic diagram, and wherein, l is two mobile phone photographic base lengths；

Fig. 2 is fruit tree to be measured photography point position selection schematic diagram, wherein, S₁、S₂、S₃、S₄Be respectively selection takes the photograph website, and D is Crown diameter, H is the height of tree；

Fig. 3 is fruit tree any fruit schematic diagram to be measured, wherein, d_iFor fruit trans D, d_iFor fruit longitudinally height.

Five, detailed description of the invention:

Smart mobile phone Photographic technique estimation fruit tree is preced with the technical method of body and fruit output and traditional output of the fruit tree side of determination Method is compared, and realizes in theory and has had bigger improvement and innovation in practical operation, being embodied in:

1) such as Fig. 1 so, on vertical baseline dispose two smart mobile phones focused, the wherein a length of l of mobile phone photographic baseline, The tripod coordinating fixing vertical baseline constitutes photogrammetric equipment；

2) as in figure 2 it is shown, at least select S around fruit tree to be measured₁、S₂Two photography websites set up photogrammetric equipment, it is ensured that really Tree crown body and tree are intactly imaged in photography photo, the most vertically shoot fruit tree to be measured, form stereogram, root According to photogrammetry principles, utilize Mathematical ModelingAnd Mathematical Modeling Simultaneous determines the relative dimensional coordinate (X, Y, Z) of any picture point of fruit tree to be measured homologue side point, wherein, N₁、N₂For spot projection system Number, Δ X, Δ Y be respectively photographic base at X-axis and the component of Y-axis, (u, v),It is respectively upper and lower two mobile phone shooting pictures The image space coordinate of sheet,Object coordinates (can be assumed that as (0,0,0)) for camera shooting center, lower section；

3) by automatically obtaining crown diameter picpointed coordinate corresponding with the height of tree, according to step 2), utilize Mathematical Modeling Try to achieve fruit tree to be measured hat body crown diameter size D and height of tree H；

4) as in figure 2 it is shown, select S around fruit tree to be measured₁、S₂、S₃、S₄Photography website carries out vertical picture to fruit tree fruit To photography, it is ensured that the fruit on fruit tree can all be imaged on shooting photo, also with Mathematical Modeling 1., 2., 3., automatically Try to achieve the horizontal width d that fruit as shown in Figure 3 is corresponding_iWith vertically height h_i；

5) Mathematical Modeling is utilizedWherein, w_iFor the yield of single fruit, a, b, c For coefficient, matching step 4) d that the fruit tried to achieve is corresponding_iAnd h_i, determine yield w of corresponding fruit_i；

6) Mathematical Modeling is utilizedW is the overall yield of fruit tree to be measured, and N is the fruit amount on fruit tree, really Overall yield W of fixed fruit tree to be measured；

7) Mathematical Modeling is utilizedMatching step 3) fruit tree hat body crown diameter D and height of tree H tried to achieve, and Yield W of corresponding fruit tree, simulates fruit tree overall yield and corresponding fruit tree hat body and the relational model of the height of tree, and final utilization is preced with body Size and height of tree value, i.e. can determine that output of the fruit tree

Claims

1. smart mobile phone Photographic technique measures fruit tree hat body and a method for fruit output estimation, it is characterized in that: at vertical baseline On dispose two to focus smart mobile phone up and down, coordinate the tripod of fixing vertical baseline to form photogrammetric equipment, to fruit to be measured Tree the most vertically shoots, and forms stereogram；Utilize Mathematical ModelingAnd Mathematical Modeling Simultaneous determines the relative dimensional coordinate (X, Y, Z) of any picture point homologue side point, Wherein, N₁、N₂For spot projection coefficient, Δ X, Δ Y are respectively photographic base at X-axis and the component of Y-axis, (u, v), (uⁿ, vⁿ) respectively The image space coordinate of photos is shot for upper and lower two mobile phones,Object coordinates for camera shooting center, lower section；At least In both direction, fruit tree is photographed around fruit tree, obtain complete fruit tree hat body information, treated accordingly by automatic acquisition 2. the image space coordinate of measuring point, utilize Mathematical Modeling and Mathematical ModelingTry to achieve fruit tree crown diameter D and tree High H.

2. measure fruit tree hat body and the method for fruit output estimation, its feature according to claim 1 smart mobile phone Photographic technique It is: utilize the photogrammetric equipment of vertical baseline that fruit tree to be measured is photographed at least to select around fruit tree 3 to take the photograph website and set up and take the photograph Shadow equipment, it is ensured that the fruit on fruit tree to be measured can be imaged on photography photo；By obtaining the corresponding picture point of fruit on fruit tree 1., 2., 3. coordinate, utilize Mathematical Modeling, automatically tries to achieve the horizontal width d that fruit is corresponding_iWith vertically height h_i；Utilize mathematical modulo TypeWherein, w_iFor the yield of single fruit, a, b, c are coefficient, coordinate fruit to be asked Corresponding d_iAnd h_i, try to achieve yield w of corresponding fruit_i；Utilize Mathematical ModelingW is the entirety of fruit tree to be measured Yield, N is the fruit amount on fruit tree, determines the overall yield of fruit tree to be measured.

3. measure fruit tree hat body and the method for fruit output estimation, its feature according to claim 1 smart mobile phone Photographic technique It is: utilize Mathematical ModelingCoordinate fruit tree hat body crown diameter D and height of tree H tried to achieve, and the product of corresponding fruit tree Amount W, simulates fruit tree overall yield and corresponding fruit tree hat body and the relational model of the height of tree, and final utilization is preced with body size and the height of tree Value, i.e. can determine that output of the fruit tree