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All-sky imager based on visible light and infrared synthetic image and cloud cover calculation method

An all-sky imager, a technology for synthesizing images, applied in computing, image enhancement, image analysis, etc., can solve the problem of not providing image threshold segmentation method, cloud cover calculation errors, etc., to eliminate image distortion and distortion, eliminate errors, Data acquisition objective effect

Pending Publication Date: 2022-04-19
SOUTH CHINA UNIV OF TECH
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Problems solved by technology

This invention is similar to the Chinese utility model patent 202021111651.5. The use of a fisheye lens will distort the edge of the image and lead to errors in the calculation of cloud cover, and the calculation of visible light cloud cover and infrared cloud cover does not provide a specific image threshold segmentation method.

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  • All-sky imager based on visible light and infrared synthetic image and cloud cover calculation method
  • All-sky imager based on visible light and infrared synthetic image and cloud cover calculation method
  • All-sky imager based on visible light and infrared synthetic image and cloud cover calculation method

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Embodiment Construction

[0071] The present invention will be further described below in conjunction with the accompanying drawings, but the scope of protection claimed by the present invention is not limited to the scope indicated in the embodiments.

[0072] Such as Figure 1~3 As shown, an all-sky imager based on synthetic images of visible light and infrared, including a spherical housing 1, a visible light camera 2, an infrared camera 3, a rotating shaft 4, a connecting arm 5, a rotating pan head 6, a control unit 9, and a data transmission unit 10 and data processing unit 11; The rotary platform 6 that can rotate on the horizontal plane is installed on the horizontal plane, and the two sides of the rotary platform 6 are vertically provided with connecting arms 5; the two connecting arms are equipped with rotating shafts 4, and the rotating shafts 4 are parallel to the horizontal plane , a spherical housing 1 is installed on the rotating shaft, and a visible light camera 2 and an infrared camera ...

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Abstract

The invention discloses an all-sky imager based on a visible light and infrared synthetic image and a cloud cover calculation method. A spherical shell of the all-sky imager can rotate around a vertical central shaft and a horizontal central shaft at the same time; lenses of the visible light camera and the infrared camera are respectively arranged at the upper end and the lower end of the maximum horizontal section of the spherical shell and on the surface of the same spherical section passing through the center of sphere of the spherical shell; the control unit is connected with the motor for controlling the spherical shell to rotate in the vertical direction and the horizontal direction, the data transmission unit, the data processing unit, the visible light camera and the infrared camera, and the data transmission unit is further connected with the data processing unit, the visible light camera and the infrared camera. According to the invention, the visible light and infrared dual-band sky image is obtained through an image synthesis mode, and automatic acquisition of cloud cover data in meteorological observation is realized by using an image processing method of a red-blue ratio threshold value and a gray level threshold value. The method is especially suitable for all-weather 24-hour cloud cover monitoring, and has the advantages of low cost and accurate calculation.

Description

technical field [0001] The invention relates to a cloud amount observation device, in particular to an all-sky imager with a dual-band composite image and a method for calculating cloud amount through an image threshold, belonging to the field of meteorological monitoring. The device is used to acquire cloud cover data in all-sky images and meteorological parameters. Background technique [0002] In meteorological observation, cloud amount, as a common meteorological parameter, plays an important role in climate change and rainfall prediction. Moreover, the amount of cloud in the sky has a great influence on the radiation transfer between the atmosphere and the ground, which hinders the transfer of solar radiation to the ground. plays an important role in. [0003] The current cloud cover acquisition is mainly done through manual visual observation. This method requires professional observers to observe and count the cloud cover every hour. In addition, due to the large s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/50G06T5/00G06T7/33
CPCG06T5/50G06T7/33G06T2207/10048G06T2207/20221G06T5/80G06T5/70
Inventor 张磊赵城张玉孟庆林
Owner SOUTH CHINA UNIV OF TECH
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