Tibetan highland barley leaf lesion identification method

Abstract

The invention discloses a Tibetan highland barley leaf lesion identification method, and belongs to the field of image processing. The method comprises the following steps of converting a preprocessedimage into an HSV color space; performing threshold processing on the image in an HSV color gamut; wherein a color is light brown and dark brown, and the color in the middle is dark brown; remainingcolor setting to white, merging with an original image, setting H and S classification grades and change ranges; and counting H and S component data in the image according to a setting result, creating a histogram, normalizing the histogram height of the image, training a KNN classifier by taking the normalized histogram height and the corresponding abscissa as image features and labels, performing the same processing on an image sample for testing, and inputting the image sample into the KNN classifier to obtain a prediction result. According to the highland barley lesion identification method, images of normal highland barley leaves and lesion highland barley leaves can be well classified by filtering and denoising the images, extracting and normalizing color space features and classifying the images by a support vector machine, and the highland barley lesion identification efficiency and accuracy are improved.

Description

technical field

[0001] The invention belongs to the field of image processing, and in particular relates to a method for recognizing barley leaf lesions. Background technique

[0002] Net spot disease is an important disease of highland barley. In recent years, due to climate, soil and other factors, the local area where the disease has occurred has caused serious damage to the susceptible varieties. When it occurs seriously, it will cause the leaves to die and the grains to fail. Mainly damages leaves, but also infects leaf sheaths and ears. The yield of diseased plants is reduced by 20% to 30%, and the yield of high-susceptibility varieties can be reduced by more than 50%. The quality of diseased wheat is also reduced. Diseased leaves have yellowish-brown to light-brown patches with unclear boundaries between disease and health, and there are criss-crossed thin lines inside, which are dark brown. When there are many lesions, they will form dark brown stripes. The variety...

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