FIELD: agriculture.
SUBSTANCE: invention relates to the field of meteorology and relates to a method of determining the total cloud amount. To determine the total cloud amount the colour half-tone image of the entire dome of the sky is obtained in the visible spectrum area and for all the points of the image the comparison of values of the colour components is carried out. If the value of the blue component is greater than the value of the red and green components, the point is assigned the value of "blue sky". If the value of the blue component is less than the value of red or green component, the point is assigned the value of "non-blue sky". The total cloud amount is defined as the relative number of points of the image, which are assigned the value of "non-blue sky".
EFFECT: technical result is to improve the reliability and accuracy of measurements.
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