Freezing detection method based on image processing

A detection method and image processing technology, which are applied in the fields of image processing and meteorological observation, can solve the problems of difficulty in recording the moment when the icing phenomenon occurs, and achieve the effect of low cost and simple equipment.

Inactive Publication Date: 2011-05-25
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

"It can be seen that as a basic ground phenomenon, icing can only be judged and recorded by manual observation.
Although manual observation is more accurate in distinguishing the phenomenon itself, there are the following problems that are difficult to solve: 1. Most of the icing phenomenon occurs at night, which puts forward certain requirements for the site and the observers themselves
2. It is difficult to accurately record the time when the icing phenomenon occurs

Method used

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  • Freezing detection method based on image processing
  • Freezing detection method based on image processing
  • Freezing detection method based on image processing

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Embodiment Construction

[0021] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings.

[0022] The observation object of the present invention is a circular evaporation water tank placed outdoors to hold water. Place a light plastic disc on the water surface, mark the disc with Arabic numerals, such as 1-9, uppercase English letters, such as A-T and other characters, such as figure 1 shown. Suspend a micropipette above the disc. The device continuously sprays air for a fixed period of time at fixed intervals, and each air injection will cause the disc to rotate. As a driving device, the advantage of using the air jet method is that there is no physical contact with the frozen disk or the water surface, and the short duration of the air injection can also ensure that the disk can rotate slowly when no ice is formed. Minimize the interference caused by the natural phenomenon of icing as much as possible. Use the camera to regularly ...

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Abstract

The present invention discloses a freezing detection method based on image processing, which can realize unattended and automated observation of a freezing phenomenon. The method comprises the following steps: making different character marks on the surface of a disc, arranging the disc into a water tank after marking, exerting instantaneous force on the disc according to a certain time interval, and collecting a sequence image of the disc; and matching the shape and the position of the last frame of the sequence image with the shapes and the positions of preceding frames character by character. If the matching is successful, the disc does not rotate during collection of the sequence image, and water is frozen. The rotation of the disc can be detected automatically by adopting the image processing algorithm, and the water freezing can be detected indirectly according to the results. No human intervention is needed during detect, the operation is simple and the cost is low.

Description

technical field [0001] The invention belongs to the field of image processing and meteorological observation, and in particular relates to an image processing method to indirectly observe whether the water surface freezes. Background technique [0002] Meteorological observation is the basis of meteorological operations. Surface meteorological observation is an important part of meteorological observation. It is a systematic and continuous observation and measurement of meteorological conditions and their changing processes within a certain range of the earth's surface. Services provide an important basis. [0003] The definition of "icing" in the observation of weather phenomena in the fourth part (QX / T48-2007) of the Meteorological Industry Standard of the People's Republic of China "Specifications for Surface Meteorological Observation" is: "The open water surface (including the water in the evaporator) freezes into ice." At the same time, it is also clearly pointed out...

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Application Information

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IPC IPC(8): G01W1/00G01C11/12
CPCY02A90/10
Inventor 曹治国朱磊卓问鄢睿丞马舒庆李肖霞
Owner HUAZHONG UNIV OF SCI & TECH
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