Sun halo photometer detection system, detection method, system, medium and equipment

Abstract

The invention belongs to the technical field of sky background brightness detection, and discloses a sun halo photometer detection system, a detection method, a system, a medium and equipment. A phase congruency method is adopted to extract a feature structure boundary from an SBM image, and isotropic two-dimensional odd symmetry filtering functions are obtained from a vector sense by utilizing Liss transform, so that the whole set of local phase amplitude theory is directly applied to the two-dimensional image. The method comprises the steps of separating a solar surface edge and a blindage edge by adopting a cross-correlation method; performing circular equation fitting by adopting least square fitting to obtain a heliocentric coordinate, a sun radius, a blindage center coordinate and a blindage radius on the image; and determining the position of a bracket connected with the blindage by using cross-correlation under polar coordinates. According to the method, a sun surface area and a sky area required for calculating sky background brightness are divided from an SBM original observation image, the average brightness of the sky area and the brightness of a sun surface center area are calculated respectively, and the ratio of the average brightness to the brightness is the daytime sky background brightness for measuring the coronal observation condition.

Description

technical field [0001] The invention belongs to the technical field of sky background brightness detection, and in particular relates to a halo photometer detection system, detection method, system, medium and equipment. Background technique [0002] The sky background brightness is the ratio of the scattered light intensity in the area around the sun to the heliocentric intensity, and it is an important parameter to measure the corona observation on the ground. The modern halo photometer was designed and applied in the ATST (Advanced Technology Solar Telescope) telescope site selection project in the United States. This invention introduces it into the sun site selection work in western China to measure the background brightness of the sky, because of its easy operation and portability , especially suitable for solar siting work, the accuracy of measurement and the continuity of data acquisition also make it more suitable for statistical research than traditional Evans phot...

AI Technical Summary

Problems solved by technology

[0004] Through the above analysis, the existing problems and defects of the existing technology are: the actual observation conditions are relatively complicated, and the traditional method is not enough to extract the clear edge of the sun and the edge of the ND4 light reduction film, resulting in inaccurate extraction of the effective sky area and the sun area

[0005] The difficulty of solving the above problems and defects is: any traditional image processing method based on intensity changes cannot effectively solve the problem

By adjusting the image processing parameters, the data in a short period of time can be processed. However, this requires human judgment, is not universal, and cannot realize the automatic processing of massive data.

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