Blue algae monitoring device and blue algae monitoring method

Abstract

The invention discloses a blue algae monitoring device and a blue algae monitoring method. The method comprises the following steps: collecting a plurality of sample images; utilizing the sample images to respectively compose a sample blue algae image set and a monitored image training set; calculating and obtaining a blue algae pixel characteristic threshold value according to the sample blue algae image set and the monitored image training set; collecting the image to be monitored; dividing the image to be monitored into a blue algae area and a non-blue algae area according to the blue algae pixel characteristic threshold value; and giving an early-warning message when the ratio between the area of the blue algae area and the area of the image to be monitored exceeds an early-warning threshold value. In the invention, the blue algae are monitored automatically in real time according to water-surface images; and the early alarm is given according to the explosion intensity of the blue algae. The collecting and processing of the image to be monitored and the explosion intensity evaluation calculation are realized by the monitoring device; and the explosion intensity result of the blue algae is only transmitted to a remote monitoring center, thus reducing the data transmission quantity. The early alarm message and the glue algae positioning information are together sent to the remote monitoring center, thus facilitating the positioning of the explosion position of the blue algae.

Description

technical field [0001] The invention relates to the technical field of water environment monitoring and water environment protection, in particular to a device and method for monitoring cyanobacteria on the water surface. Background technique [0002] With the rapid development of industry and agriculture in my country and the acceleration of urbanization, the discharge of nitrogen, phosphorus and other nutrient substances in industrial wastewater, domestic sewage, and agricultural irrigation wastewater is increasing, and the problem of lake eutrophication is becoming increasingly prominent. According to statistics, more than 66% of lakes and reservoirs in my country are already in eutrophic state, and 22% of them are in heavy eutrophic and super eutrophic state. A common phenomenon accompanying it is the frequent occurrence of blue-green algae. As a worldwide problem, blue-green algae outbreaks not only affect the water landscape and poison aquatic organisms, but also destr...

AI Technical Summary

Problems solved by technology

Using remote online water quality sensors to collect various water quality parameters (such as pH value, dissolved oxygen, redox potential, conductivity, etc.) Quantitative correspondence of cyanobacteria outbreaks can only be qualitatively described by empirical threshold methods at present (for example, low, medium, and high levels of cyanobacteria outbreaks are given)

[0008] In summary, none of the existing methods can simultaneously provide independent, low-cost, real-time and accurate cyanobacteria monitoring and early warning functions

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