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An image-based method for measuring plant leaf area

A measurement method and leaf technology are applied in the field of plant leaf area measurement, which can solve the problems of poor image quality and low measurement accuracy, and achieve the effects of improving accuracy, eliminating influence, and promoting application value.

Active Publication Date: 2018-03-27
HUAIYIN TEACHERS COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides an image-based method for measuring leaf area of ​​plants, which solves the problems of poor image quality and low measurement accuracy when measuring leaf area by image method

Method used

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  • An image-based method for measuring plant leaf area
  • An image-based method for measuring plant leaf area
  • An image-based method for measuring plant leaf area

Examples

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Embodiment Construction

[0020] In order to make the objects and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0021] The blade backlight shooting and image-assisted affine correction device used in the embodiment of the present invention is as follows: Figure 1-2 As shown, the upper surface of the blade backlight shooting and image-assisted affine correction device is provided with a perspective correction frame 1 and eight red rectangles a, b, c, d, e, f, g, and h, and the area of ​​each red rectangle has been known, denoted as S a , S b , S c , S d , S e , S f , S g , S h , the four vertices of the perspective correction frame are A, B, C, and D respectively. A surface light source is installed at the bottom of the device. The surface light s...

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Abstract

The invention discloses a plant blade area measuring method based on images. The plant blade area measuring method based on images includes the following steps: utilizing a device to collect the blade area, wherein a perspective correction frame and a, b, c, d, e, f, g and h 8 red rectangles are arranged on the upper surface of the device; utilizing the perspective cutting function of PhotoShop to perform perspective cutting on images according to the four vertexes: A, B, C and D of the perspective correction frame in the images to realize affine correction of the images so as to enable the areas represented by any two pixels in the images to be identical to each other; and calculating the coefficient of variation between the areas of different rectangles and the known areas, and calculating the coefficient of variation for the obtained coefficient of variation again, wherein if the coefficient of variation is less than 2%, being able to calculate the blade area; and if not, performing affine correction on the shot plant blade images again. The plant blade area measuring method based on images utilizes the area source and uses the backlight mode to shoot plant blades, thus eliminating the influence of the light of the surrounding environment on shooting, and improving the quality of the images.

Description

technical field [0001] The invention relates to a method for measuring the area of ​​plant leaves, in particular to an image-based method for measuring the area of ​​plant leaves. Background technique [0002] The leaf area index of crops can be obtained by measuring the leaf area of ​​plants. The leaf area index is of great significance for monitoring crop growth, estimating yield, and guiding agricultural production. There are many methods for measuring leaf area, among which the image-based method for measuring leaf area developed in recent years has the advantages of simple equipment, high efficiency, and easy popularization and application. The image is collected by a digital camera, and the number of pixels of the leaf in the image is obtained by software, and then the actual area of ​​the leaf in the image can be calculated according to the area represented by each pixel. The software can use Photoshop, Matlab, AutoCAD, etc. When photographing leaves, put a ruler nex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01B11/28
CPCG01B11/28G01B11/285
Inventor 刘乃森刘福霞张梦雅陈国栋夏静张婷吴贺贺杨婷唐钰李金燕杨丹妮马兰
Owner HUAIYIN TEACHERS COLLEGE
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