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An astronomical image fusion method based on Fourier transform

A technology of Fourier transform and astronomical imagery, which is applied in image enhancement, image data processing, graphic image conversion, etc. It can solve the problems of discarding detailed information, low data usage rate, and poor imaging effect, etc., to achieve imaging effect Excellent, simple method, good imaging effect

Active Publication Date: 2019-06-28
KUNMING UNIV OF SCI & TECH
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Problems solved by technology

[0006] The present invention provides an astronomical image fusion method based on Fourier transform, which is used to solve the problems in the traditional lucky imaging technology that the data usage rate is not high, some detailed information will be discarded, and the imaging effect is not very good

Method used

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  • An astronomical image fusion method based on Fourier transform
  • An astronomical image fusion method based on Fourier transform
  • An astronomical image fusion method based on Fourier transform

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Embodiment 1

[0034] Embodiment 1: as Figure 1-6 Shown, a kind of astronomical image fusion method based on Fourier transform, the concrete steps of described astronomical image fusion method based on Fourier transform are as follows:

[0035] Step1. Read the fits file to obtain the image data to be preprocessed. The fits file includes a file header and a data part, wherein the file header contains the target information, including image size, quantity, number of data bits, and observation conditions, etc. Process the data part of the fits file, perform background subtraction processing on each frame of image, then use peak detection method to remove cosmic rays, perform mean value filtering, and then find the maximum value of the pixel in the image, and use the maximum value The point is the coordinate center for cropping, and the cropped picture is obtained, and the registration of the picture is completed, and the preprocessing file is obtained; the size of the picture of the subject of...

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Abstract

The invention relates to an astronomical image fusion method based on Fourier transform, and belongs to the field of astronomical image processing. The method comprises the steps of reading a firmwarefile, performing background deduction processing on each frame of image, removing cosmic rays, performing mean filtering, finding out a maximum value of pixels in the image, performing cutting by taking a point where the maximum value is located as a coordinate center to obtain a cut picture, and completing registration of the picture to obtain a pre-processed file; Grouping the pre-processed files, and carrying out data processing to obtain a frequency domain reconstructed image of each group; And superposing the processing results of each group, calculating an average value, carrying out Fourier inverse transformation on the final result image, and carrying out enhancement processing on the reconstructed high-resolution image to obtain a final high-resolution image. The imaging effect of the method is superior to that of a classic airspace lucky imaging algorithm, and for processing picture data observed by a telescope without an adaptive optical system, the imaging effect is also very good, and the data utilization rate is higher.

Description

technical field [0001] The invention relates to an astronomical image fusion method based on Fourier transform, belonging to the technical field of astronomical image processing. Background technique [0002] Due to the influence of atmospheric turbulence, the wave front of electromagnetic waves from distant celestial bodies will be distorted, which will greatly reduce the imaging quality of ground-based telescopes. For some more distant point targets, due to the influence of turbulence, it is difficult to obtain useful images when observing with base telescopes. High-resolution imaging of astronomical images is a kind of image processing technology, the essence of which is to remove noise interference and obtain clear high-resolution image information. [0003] Currently commonly used image processing technologies mainly include speckle imaging of the horizontal transmission path, image restoration technology based on short-exposure image information fusion, stagnation poi...

Claims

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Application Information

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IPC IPC(8): G06T5/50G06T5/00G06T3/40
Inventor 李彬华胡兴
Owner KUNMING UNIV OF SCI & TECH
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