Method, device and system for measuring angle of rice flag leaf

Abstract

The invention provides a method for measuring angle of a rice flag leaf. The method includes the steps of acquiring an image of the base of the rice flag leaf and preprocessing the image, subjecting the preprocessed image to foreground extraction to acquire images of the rice flag leaf and the stem, subjecting the foreground image to binaryzation and morphological process, refining the images after the morphological process, performing linear detection to the refined images and cluster analysis to linear inclination detected, and calculating the angle of the flag leaf according to the angle value of the cluster center obtained by cluster analysis, and accordingly, can realize measuring angle of the rice flag leaf rapidly, accurately and nondestructively. The invention further provides a device for measuring angle of the rice flag leaf. The device comprises a background panel, a support, a clamping unit and an image acquisition and processing unit and is used for acquiring and processing the image of the base of the rice flag leaf.

Description

technical field [0001] The invention relates to the field of agricultural technology, in particular to a method, device and system for measuring the angle of rice flag leaves. Background technique [0002] Rice breeding practice shows that rice plant type is closely related to yield potential. Therefore, how to select the ideal plant type of rice has become one of the important research contents of rice super-high-yield breeding. Leaf is an important factor in the composition of plant type, which is directly related to the photosynthetic area and light energy utilization efficiency of the leaf. Among them, the flag leaf plays a more prominent role in the formation of rice yield, and is the main supplier of photosynthetic products transported to the ear. Therefore, flag leaf, as one of the main sources of photosynthetic products, directly determines the rice panicle and its yield-related traits. The flag leaf angle of rice refers to the angle between the main stem of rice p...

AI Technical Summary

Problems solved by technology

[0005] Although the direct measurement method is easy to operate, it can be measured by manually holding a protractor and placing it between the main stem and the flag leaf, but due to the large influence of subjective factors in the measurement process, the measurement accuracy is poor and the error is large; The map method can measure relatively accurately, but the measurement speed is slow, and the process of drawing the position of the leaf pillow and leaf tip on the paper is inconvenient to operate, and is not suitable for a large number of measurements; although the method of Xu Zhengjin et al. can be more accurate and fast Measure the size of the included angle, but the main stem and flag leaf to be measured need to be cut off from the plant during the measurement process, causing permanent damage to the plant

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