太阳高分辨序列图像配准误差的矫正

发布时间：2018-01-17 03:27

本文关键词：太阳高分辨序列图像配准误差的矫正　出处：《昆明理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：地球和空间望远镜产生了大量的太阳高分辨图像,为了更好的获得太阳图像中的动态信息,需要对序列图像进行处理研究,而不是局限在单帧图像中。在对太阳高分辨序列图像进行配准的过程中,会有一定的系统差,对于整个序列图像来说,由于误差的累积,每两帧图像之间较小的误差会导致整个序列图像的漂移。本文提出一种平差的方法,在配准整个序列图像的过程中,来克服和削弱整个序列图像配准后的系统误差的累计和偶然误差的影响。本文通过平差的方法分别对模拟图像、真实图像数据进行了实验分析。在模拟实验中,首先构造一组序列图像,通过对这组序列图像进行配准,获取图像之间的位移值。根据图像之间位移值关系,给位移值加上相应的改正数,构造误差方程。根据最小二乘原理以及拉格朗日乘数法,构造方程。求解方程,获得改正数的值。将位移值加上相应的改正数就得到了矫正值。在模拟试验中,试验了不同的策略,以及在处理序列图像过程中,在已经选择的策略上重新选择重叠几幅图像进行矫正。还有对图像进行了加噪声,变形等处理。通过不同的试验,说明平差的方法对于序列图像配准误差的矫正是有效果的。在对太阳光学望远镜的太阳高分辨序列图像矫正过程中,由于不能像模拟实验那样可以模拟出序列图像的理论值作为最后平差矫正值的参照。通过对同一组序列图像的不同区域进行配准。用不同的测量值进行平差矫正获得相对应的一组矫正值。最后在结果图上分析各组的测量值和矫正值。也证实了平差方法的有效性。
[Abstract]:Earth and space telescopes have produced a large number of high-resolution images of the sun, in order to obtain better dynamic information in the image of the sun, it is necessary to process the sequence images. It is not confined to a single frame image. In the process of registration of the high-resolution sequence image of the sun, there will be a certain system difference, for the whole sequence image, because of the accumulation of errors. The small error between each two frames will lead to the drift of the whole sequence image. In this paper, we propose an adjustment method in the process of registration of the whole sequence image. In order to overcome and weaken the effect of the system error accumulation and accidental error after the whole sequence image registration, this paper carries on the experiment analysis to the simulation image and the real image data by the method of adjustment. In the simulation experiment. First, a set of sequence images are constructed, and the displacement values of the images are obtained by registration of the sequence images. According to the relationship between the displacement values of the images, the corresponding corrections are added to the displacement values. According to the least square principle and Lagrange multiplier method, the equation is constructed. The value of the correction is obtained by solving the equation. The correct value is obtained by adding the displacement value with the corresponding correction. Different strategies are tested, and in the process of processing sequence images, several overlapping images are re-selected for correction in the selected strategy, and noise is added to the images. Through different experiments, it is proved that the adjustment method is effective in correcting the registration error of the sequence image, and in the process of correcting the solar high-resolution sequence image of the solar optical telescope. Because the theoretical value of the sequence image can not be simulated as the reference of the final adjustment correction value, the different regions of the same sequence image can be registered and the adjustment correction can be carried out with different measurement values. The corresponding correction values are obtained. Finally, the measured and corrected values of each group are analyzed on the result diagram. The validity of the adjustment method is also verified.
【学位授予单位】：昆明理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P182.2;TP391.41

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