Super-Resolution Image Reconstruction of Aerial Photography Based on Projection onto Convex Sets

XU Mei-fang; LIU Jing-hong

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Super-Resolution Image Reconstruction of Aerial Photography Based on Projection onto Convex Sets

Imaging Technology & Image Processing | 更新时间：2020-08-12

- Super-Resolution Image Reconstruction of Aerial Photography Based on Projection onto Convex Sets
- Chinese Journal of Liquid Crystals and Displays Vol. 25, Issue 6, Pages: 873-877(2010)
- 作者机构：
  
  1. 中国科学院研究生院,北京 100039
  2. 中国科学院长春光学精密机械与物理研究所,吉林长春,130033
- 作者简介：
- 基金信息：
- DOI：
  CLC： TN91
- Received：21 April 2010，
  
  Revised：18 May 2010，
  
  Published Online：20 December 2010，
  
  Published：20 December 2010
- 稿件说明：
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徐美芳, 刘晶红. 基于边缘保持的航拍图像凸集投影超分辨率重建算法[J]. 液晶与显示, 2010,25(6): 873-877

XU Mei-fang, LIU Jing-hong. Super-Resolution Image Reconstruction of Aerial Photography Based on Projection onto Convex Sets[J]. , 2010,25(6): 873-877
徐美芳, 刘晶红. 基于边缘保持的航拍图像凸集投影超分辨率重建算法[J]. 液晶与显示, 2010,25(6): 873-877 DOI：

XU Mei-fang, LIU Jing-hong. Super-Resolution Image Reconstruction of Aerial Photography Based on Projection onto Convex Sets[J]. , 2010,25(6): 873-877 DOI：

摘要

针对传统的凸集投影(POCS)超分辨率图像重建算法经常出现的边缘模糊问题

在传统POCS算法原理基础上

文章使用基于梯度插值的算法生成POCS重建的初始估计图像

然后对中心点为边缘像素的空间点扩散函数(PSF)进行修正

使其系数沿梯度大的方向减小

梯度小的方向保持不变。利用改进的POCS算法进行了超分辨率图像重建实验

结果表明

图像峰值信噪比由原来的27.29 dB达到28.12 dB。该方法有效地保持了边缘特性

改善了超分辨率图像重建质量。

Abstract

The traditional projection onto the convex sets super-resolution image reconstruction algorithm leads to the blur edge of reconstructed high resolution image. Based on the traditional algorithm

a method based on gradient interpolation is proposed

which is used to generate the initial estimation of the super-resolution image. Furthermore

by modifying the point spread function(PSF)

the center of which is on the edge

the coefficients along the direction of big gradient are reduced

while others keep constant. We reconstruct a set of low resolution images with the updating algorithm. The experimental results show that the edges kept very well

and the performance of the reconstructed images is improved.

关键词

Keywords

references

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