Wide-angle camera shooting based discrete type canopy leaf area index detection system and method

Abstract

The invention discloses a wide-angle camera shooting based discrete type canopy leaf area index detection system and method. The wide-angle camera shooting based discrete type canopy leaf area index detection system comprises a computer, a wide-angle camera which is connected with the computer and a lifting mechanism; the lifting mechanism comprises a vertical lifting rod and a horizontal sliding rod; the horizontal sliding rod is installed on the vertical lifting rod; the wide-angle camera which is installed on the horizontal sliding rod can move on the horizontal sliding rod. According to the wide-angle camera shooting based discrete type canopy leaf area index detection method, color figure canopy images are obtained through the wide-angle camera, grey level transformation, image intensification, filtering processing, binarization processing and porosity extraction are sequentially performed on the color figure canopy images, finally the canopy leaf area index is calculated according to the canopy porosity. The wide-angle camera shooting based discrete type canopy leaf area index detection method has the advantages of being suitable for leaf area index calculation of discrete type canopies which are uneven in distribution, accurate in detection result, reducing incoming noise influence to data during the image processing process and eliminating the leading interference of the image processing process.

Description

technical field [0001] The invention relates to a leaf area index detection technology, in particular to a discrete canopy leaf area index detection system and method based on wide-angle photography. Background technique [0002] Leaf Area Index LAI (Leaf Area Index) refers to the ratio of the total area of ​​crop leaves on a piece of land to the land area, and is an important structural parameter of the ecosystem, used to reflect the number of plant leaves, changes in canopy structure, and plant community life Vitality and its environmental effects. At present, the research objects of leaf area index are mainly for rice, wheat, forest and other crops with relatively uniform canopy, but less research is done for fruit trees with discrete canopy. At present, the cost of equipment used to detect LAI of fruit tree canopy is generally high, and the operation process is complicated, which is greatly affected by the detection environment, which limits its promotion. In recent ye...

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Problems solved by technology

However, the Poisson model adopted by this leaf area index method can only deal with the canopy with uniform distribution. For the discrete canopy with complex uneven distribution structure, the measurement accuracy of this method is low.

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