The Disease Assessment of Cucumber Downy Mildew Based on Image Processing


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International Journal of Advanced Network, Monitoring and Controls

Xi'an Technological University

Subject: Computer Science, Software Engineering


eISSN: 2470-8038





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VOLUME 2 , ISSUE 4 (December 2017) > List of articles

The Disease Assessment of Cucumber Downy Mildew Based on Image Processing

Jingzhu Li / Peng Wang / Changxing Geng

Keywords : Cucumber downy mildew, Image processing, Disease assessment, human eyes assessment, linear correlation

Citation Information : International Journal of Advanced Network, Monitoring and Controls. Volume 2, Issue 4, Pages 176-180, DOI:

License : (CC BY-NC-ND 4.0)

Published Online: 23-April-2018



Cucumber downy mildew is a kind of disease which spreads very fast and isdangerous, in order to prevent the disease, peoplealways spray plenty of pesticides indiscriminately. Accurate assessment of the level of cucumber downy mildew is very important to the disease prevention and control. In a cucumber growing season, this paper collected the typical cucumber downy mildew leaf samples, and developed the downy mildew spot extraction algorithm by using leaf image scanning method, calculated the index of the disease. The average identification accuracy of downy mildew image reaches 98.3%, and average image processing takes 10.9 ms/picture. By compared with human eyes assessment and basic value, the result shows that the human eyes assessment method have strong subjectivity, dramatic changes and bigger error, while the image analysis method get the correlation coefficient for disease index and basic value of 0.9417, has obvious linear correlation.

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