A cotton leaf lesion area measuring device

Abstract

The utility model discloses a cotton leaf spot area measuring device, including fixed plate, measuring plate, support rod, support plate, cross bar and camera, and the opposite two side panels between measuring plate are placed on the fixed plate and can compress the leaf to be measured, the panel of measuring plate is equipped with a plurality of concentric arrangement and the measuring ring of different diameter size, and the bottom end vertical fixed in the fixed plate top surface of support rod, and the top end of support rod is connected in the up and down sliding of support plate, and the cross bar sliding connection is in support plate, and the camera sliding connection is in the cross bar to take the leaf to be measured, and the computer communication connection computer to analyze and process the image that takes photograph. The utility model discloses through the transparent measuring plate, the leaf to be measured is pressed on the fixed plate, and the camera is adjusted to the appropriate position and takes photograph to the measuring plate, and the measuring ring on the measuring plate can reflect the specification of leaf spot, and the relative spot area on the leaf can be accurately obtained by using computer programming to analyze the image.

Description

Technical Field

[0001] This utility model relates to the field of plant pathology technology, and more specifically to a device for measuring the area of ​​lesions on cotton leaves. Background Technology

[0002] Cotton, as a vital global economic crop, holds an irreplaceable position in many sectors, including the textile industry. However, frequent outbreaks of cotton Verticillium wilt severely hinder the improvement of cotton yield and quality, causing significant economic losses to the cotton industry. Cotton diseases typically manifest as lesions on cotton leaves, and relative lesion area (i.e., the area of ​​lesions per unit leaf area) is an objective indicator of disease severity. Relative lesion area is not only easy to detect but also comprehensively reflects the pathogen's ability to infect plant leaves and the lesion's expansion capacity. Furthermore, due to its objectivity, repeatability, and precision, relative lesion area has become an ideal tool for disease resistance genetic research, and this symptom indicator, adapting to the future trend of precision agriculture, is receiving increasing attention.

[0003] Methods for measuring relative lesion area can be categorized into three main types: traditional methods, instrumental methods, and software methods. Traditional methods typically involve first measuring the maximum length and width of the lesion (which must be perpendicular to each other) or the maximum diameter of the lesion, then approximating the lesion area using a formula. Another method uses a standard ruler made of mesh or plexiglass with a known area for each lesion. This method is relatively accurate but labor-intensive and time-consuming; when measuring a large number of samples, it can easily lead to operator fatigue and significant errors. Instrumental methods involve using specialized instruments to measure lesion area, but these instruments are expensive, and differences in lesion size and color can cause substantial errors. Software methods utilize existing computational software resources to process images of plant leaves; however, this method is cumbersome and not widely applicable.

[0004] Therefore, how to provide a device that is simple to operate and can quickly and accurately measure the area of ​​lesions on cotton leaves, so as to provide basic data support for the identification of cotton disease resistance, is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the present invention provides a device for measuring the area of ​​lesions on cotton leaves, which aims to solve the above-mentioned technical problems.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A device for measuring the area of ​​lesions on cotton leaves, comprising:

[0008] Fixed plate,

[0009] A transparent measuring plate is placed on a fixed plate, and the measuring plate can press the blade to be measured between its two side panels opposite to the fixed plate; the measuring plate has multiple concentrically arranged measuring rings of different diameters on its side panel;

[0010] Multiple support rods, with the bottom ends of the multiple support rods vertically fixed to the top surface of the fixed plate;

[0011] A support plate, which is slidably connected up and down to the top of the multiple support rods;

[0012] A crossbar, the axis of which is arranged perpendicular to the axis of the support rod and slidably connected to the support plate; the sliding direction of the crossbar is perpendicular to its axis.

[0013] A camera is slidably connected to the crossbar and its sliding direction is parallel to the axis of the crossbar to capture images of the blade under test. The camera is communicatively connected to a computer to analyze and process the captured images.

[0014] The beneficial effects of this utility model are as follows: the leaf to be tested is placed on a fixed plate, and the measuring plate presses the test plate and keeps it flat. The camera can achieve multi-degree-of-freedom sliding through the cooperation of the crossbar, support plate and support rod. The camera is adjusted to be directly opposite the leaf to be tested. After the camera is adjusted, it takes a picture of the measuring plate. Since the measuring plate is transparent, the size of the lesion can be accurately measured using the measuring ring on it. The image from the camera can be analyzed by computer programming, thereby accurately obtaining the relative lesion area on the leaf.

[0015] Preferably, a groove is formed in the center of the top surface of the fixing plate, and the leaf to be tested can be placed in the groove; the measuring plate covers the groove. The leaf can be pressed tightly into the groove by the measuring plate. The panel of the measuring plate and the panel of the fixing plate are located on the same plane. When the measuring plate is photographed, image errors caused by the measuring plate being higher than the fixing plate can be prevented, thus improving the measurement accuracy of leaf lesions.

[0016] Preferably, there are four support rods, which are arranged in an array on the fixed plate and enclose a measuring space, with the measuring plate located within the measuring space.

[0017] Preferably, the support plate comprises two pieces, each of which is slidably connected to one of the two support rods. The outer wall of the top end of each support rod is threaded, and a nut is screwed onto the thread and abuts against the bottom surface of the support plate to restrict its sliding. The support plate slides up and down along the support rods, thereby adjusting the vertical position of the camera and the distance between the camera and the measuring plate. This distance adjustment allows for optimal focus for shooting different sized blades.

[0018] Preferably, each of the two support plates has a first sliding groove on its panel; the bottom surfaces of the crossbar are fixed with first sliders at both ends, and the first sliders are slidably connected within the first sliding grooves. The crossbar slides within the sliding grooves of the support plates via the first sliders, and by adjusting the relative position of the crossbar and the support plates, the position of the camera relative to both sides of the crossbar axis can be adjusted.

[0019] Preferably, the side wall of the crossbar has a second sliding groove parallel to its axis, and the camera is slidably connected to the second sliding groove via a second slider. The camera can slide along the axial direction of the crossbar to adjust its position along the length of the crossbar's axis.

[0020] Preferably, the system also includes a connecting rod, one end of which is fixed to the outer wall of the support rod, and the other end is fixed to the top surface of the fixing plate to form a triangular support. The connecting rod improves the stability of the connection between the support rod and the fixing plate, ensuring that the support rod will not tilt or deform, thus preventing any impact on the camera's shooting performance.

[0021] Preferably, the measuring plate is an acrylic plate or a glass plate, and the measuring ring is printed on the panel of the measuring plate using a printing technique. The measuring ring is formed on the measuring plate using this printing technique, ensuring that the measuring plate is not hollowed out and can press the blade flatly onto the fixing plate.

[0022] Preferably, the multiple measuring rings are arranged at equal intervals. Since the multiple measuring rings are concentrically arranged, the area of ​​the lesion can be measured by reducing the area of ​​the measuring plate. At the same time, the size of the lesions on various leaves can be intuitively perceived, which is convenient for recording and comparing various lesions. The equal intervals of the measuring rings can also improve the accuracy of calculating the size of various lesions.

[0023] As can be seen from the above technical solution, compared with the prior art, this utility model discloses a cotton leaf lesion area measuring device. The leaf to be measured is pressed flat on a fixed plate by a transparent measuring plate, and the camera is adjusted to a suitable position to take pictures of the measuring plate. The measuring ring on the measuring plate can reflect the size of the leaf lesions. By using computer programming to analyze the image, the relative lesion area on the leaf can be accurately obtained. This device is simple to operate and can quickly and accurately measure the lesion area on the leaf, improving statistical efficiency. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 A schematic diagram of the measuring device provided by this utility model;

[0026] Figure 2 A cross-sectional view of the fixing plate provided by this utility model;

[0027] Figure 3 A bottom view of the measuring device provided by this utility model.

[0028] in,

[0029] 1-Fixing plate; 11-Groove;

[0030] 2-Support rod; 21-Connecting rod; 22-Thread; 23-Nut;

[0031] 3-Support plate; 31-First slide groove;

[0032] 4-Horizontal bar; 41-Second slide groove; 42-First slider;

[0033] 5-Camera; 51-Second slider;

[0034] 6-Measuring plate; 61-Measuring ring. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0036] See appendix Figures 1-3 This utility model discloses a device for measuring the area of ​​lesions on cotton leaves, comprising:

[0037] Fixed plate 1,

[0038] A transparent measuring plate 6 is placed on a fixed plate 1, and the measuring plate 6 can press the blade to be measured between its two side panels opposite to the fixed plate 1; the measuring plate 6 has multiple concentrically arranged measuring rings 61 with different diameters on its side panel.

[0039] Multiple support rods 2, with their bottom ends vertically fixed to the top surface of the fixing plate 1;

[0040] Support plate 3 is slidably connected to the top of multiple support rods 2.

[0041] The crossbar 4 is arranged perpendicular to the axis of the support rod 2 and is slidably connected to the support plate 3; the sliding direction of the crossbar 4 is perpendicular to its axis.

[0042] Camera 5 is slidably connected to the crossbar 4 and its sliding direction is parallel to the axis of the crossbar 4 to capture images of the blade under test. Camera 5 is also connected to a computer to analyze and process the captured images.

[0043] like Figure 1 As shown, the measuring plate presses the leaf to be tested flat onto the fixed plate. The measuring ring on the measuring plate can reflect the size of the leaf lesions. By adjusting the position of the camera so that it is directly facing the leaf to be tested, the image of the measuring plate captured by the camera is sent to the computer. The computer program analyzes and processes the lesions corresponding to the measuring ring, decomposes and extracts features from the lesions corresponding to the measuring ring, and converts the lesion area and leaf area respectively, finally obtaining the relative lesion area of ​​the leaf.

[0044] To further optimize the above technical solution, a groove 11 is provided in the middle of the top surface of the fixing plate 1, and the blade to be tested can be placed in the groove 11; the measuring plate 6 covers the groove 11.

[0045] The groove accommodates the blade to be tested. The measuring plate and the groove work together to press the blade to be tested firmly against the bottom wall of the groove. The top surface of the measuring plate and the top surface of the fixed plate are basically on the same plane, which can prevent the groove shooting error caused by the measuring plate being higher than the fixed plate, thereby enabling the conversion of the lesion area.

[0046] To further optimize the above technical solution, the number of support rods 2 is four. The four support rods 2 are arranged in an array on the fixed plate 1 and enclose the measurement space. The measurement plate 6 is located in the measurement space.

[0047] To further optimize the above technical solution, two support plates 3 are provided, and the two support plates 3 are respectively slidably connected to the two support rods 2; the top outer wall of the support rod 2 is provided with a thread 22, and the nut 23 is screwed on the thread 22 and can abut against the bottom surface of the support plate 3 to restrict the sliding of the support plate 3.

[0048] The support plate can slide up and down along the support rod. Once the support plate is in position, tightening the nuts will fix its position, thereby fixing the camera's up and down position.

[0049] The relative height between the camera and the mounting plate needs to be adjusted according to the size of the leaf to ensure that the camera is at the optimal focal length when shooting at the leaf. This ensures that the latest captured image is clear, and the location, size, and dimensions of the lesions are clearly visible. This facilitates feature extraction and segmentation of the leaf lesions, ensuring that the final calculated lesion area is close to the actual value.

[0050] To further optimize the above technical solution, a first sliding groove 31 is provided on the panel of each of the two support plates 3; a first slider 42 is fixed at both ends of the bottom surface of the crossbar 4, and the first slider 42 is slidably connected in the first sliding groove 31.

[0051] The crossbar can slide along the groove on the support plate via the first slider, thereby adjusting as follows: Figure 1 The front and rear positions of the camera are shown.

[0052] To further optimize the above technical solution, a second slide groove 41 parallel to its axis is provided on the side wall of the crossbar 4, and the camera 5 is slidably connected to the second slide groove 41 through the second slider 51.

[0053] The camera is fixed to the second slider, which can slide along the second groove, thereby adjusting the left and right position of the camera.

[0054] This embodiment ensures the optimal shooting angle for the leaf by adjusting the camera's up / down, forward / backward, and left / right positions. During actual shooting, the camera needs to be directly facing the position. After adjusting the focal length, the camera is used to shoot the measurement board. Since the measurement board is transparent, the latest image to be formed is the image of the leaf and the measured ring. By decomposing the lesion images within multiple measurement rings, a visual programming language is used as a development tool to preprocess the captured image samples, segment the lesions within multiple measurement rings, and measure the lesion area within each measurement ring in turn. After summarizing and converting, the total lesion area on the leaf can be obtained. The total lesion area / leaf area is the relative lesion area.

[0055] To further optimize the above technical solution, ensure the vertical freedom of the support rod, and prevent the support rod from tilting and deforming, thereby causing measurement errors, a connecting rod 21 is also included. One end of the connecting rod 21 is fixed to the outer wall of the support rod 2, and the other end is fixed to the top surface of the fixing plate 1 to form a triangular support.

[0056] In this embodiment, the measuring plate 6 is an acrylic plate or a glass plate, and the measuring ring 61 is printed on the panel of the measuring plate 6 using a printing technique. The printing technique does not create hollow holes on the measuring plate, which ensures that the measuring plate presses firmly against the blade and prevents the blade from curling during the shooting process, thus avoiding misjudgment of the area.

[0057] To further optimize the above technical solution, multiple measuring rings 61 are arranged at equal intervals.

[0058] Because multiple measuring rings are set concentrically, the area of ​​lesions can be measured by reducing the area of ​​the measuring plate. The area of ​​the measuring plate only needs to be greater than the maximum length and maximum width of the leaf. The measuring rings can intuitively feel the size of lesions on various leaves, making it easy to record and compare various lesions. The equidistant setting of each measuring ring can improve the accuracy of calculating the size of various lesions.

[0059] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0060] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for measuring the area of ​​lesions on cotton leaves, characterized in that, include: Fixing plate (1) A transparent measuring plate (6) is placed on the fixed plate (1), and the measuring plate (6) can press the blade to be tested between its two side panels opposite to the fixed plate (1); the measuring plate (6) has a plurality of concentrically arranged measuring rings (61) with different diameters on its panel; the measuring plate (6) is an acrylic plate or a glass plate, and the measuring rings (61) are engraved on the panel of the measuring plate (6) by printing technology; the plurality of measuring rings (61) are arranged at equal intervals; a groove (11) is opened in the middle of the top surface of the fixed plate (1), and the blade to be tested can be placed in the groove (11); the measuring plate (6) covers the groove (11); the area of ​​the measuring plate (6) is greater than the maximum length and maximum width of the blade; Multiple support rods (2) are vertically fixed at their bottom ends to the top surface of the fixed plate (1); there are four support rods (2), which are arranged in an array on the fixed plate (1) and enclose a measurement space, and the measurement plate (6) is located in the measurement space. Support plate (3), the support plate (3) is provided in two pieces, the two support plates (3) are respectively slidably connected to the two support rods (2) in the upper and lower parts; the top outer wall of the support rod (2) is provided with thread (22), and the nut (23) is screwed on the thread (22) and can abut against the bottom surface of the support plate (3) to restrict the sliding of the support plate (3); A crossbar (4) is arranged perpendicularly to the axis of the support rod (2) and slidably connected to the support plate (3); the sliding direction of the crossbar (4) is perpendicular to its axis. A camera (5) is slidably connected to the crossbar (4) and its sliding direction is parallel to the axis of the crossbar (4) to capture images of the blade to be tested. The camera (5) is communicatively connected to a computer to analyze and process the captured images.

2. The cotton leaf lesion area measuring device according to claim 1, characterized in that, Both of the support plates (3) have a first groove (31) on their panels; the bottom surfaces of the crossbar (4) are fixed with first sliders (42), which are slidably connected in the first groove (31).

3. The cotton leaf lesion area measuring device according to claim 2, characterized in that, The side wall of the crossbar (4) is provided with a second groove (41) parallel to its axis, and the camera (5) is slidably connected to the second groove (41) by the second slider (51).

4. The cotton leaf lesion area measuring device according to claim 1, characterized in that, It also includes a connecting rod (21), one end of which is fixed to the outer wall of the support rod (2), and the other end is fixed to the top surface of the fixing plate (1) to form a triangular support.

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