| 积分型非线性平差模型及其在超分辨率图像重建中的应用 |
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| 引用本文： | 朱建军,樊东昊,周璀,周靖鸿.积分型非线性平差模型及其在超分辨率图像重建中的应用[J].测绘学报,2015,44(7):747-752. |
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| 作者姓名： | 朱建军 樊东昊 周璀 周靖鸿 |
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| 作者单位： | 中南大学地球科学与信息物理学院, 湖南 长沙 410083 |
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| 基金项目： | The National Key Basic Research and Development Program of China (No ．2013CB733303)；The National High-tech Research and Development Program of China (863 Program)(No ．2012AA121301)；The National Natural Science Foundation of China (Nos 4．1274010；40974007)；The Funda-mental Research Funds for the Central Universities of Central South University(No 2．014zzts251)基金项目国家973计划子课题(2013CB733303)；国家863计划(2012AA121301)；国家自然科学基金(41274010；40974007)；中南大学中央高校基本科研业务费专项资金(2014zzts251) |
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| 摘 要： | 超分辨率图像重建过程就是对同一目标进行多次观测,获取多幅低分辨率影像,利用低分辨率影像求取目标的真实影像,即求取高分辨率影像的过程。这一过程与测绘领域中对同一对象进行观测,用测量平差求取对象最佳值的过程类似。本文尝试用测量平差的方法来解决超分辨率重建的问题。文中首先建立了超分辨率重建的积分型非线性平差模型,提出了用二次函数将平差模型中的积分函数参数化,用最小二乘平差方法求解。基于所提出的平差方法,制定了图像重建的具体策略。该方法可以定量分析成果的好坏,可以成功避免出现病态问题等。试验结果表明,相对于传统的超分辨率重建方法获得重建图像的视觉效果有较大的提高,而且其峰值信噪比及结构相似性指数也有很大的提高,因此方法可靠且可行。
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| 关 键 词： | 超分辨率图像重建 积分型非线性平差模型 客体表面灰度函数 |
| 收稿时间： | 2014-06-25 |
| 修稿时间： | 2015-02-03 |
Nonlinear Adjustment Model with Integral and Its Application to Super Resolu-tion Image Reconstruction |
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| ZHU Jianjun,FAN Donghao,ZHOU Cui,ZHOU Jinghong.Nonlinear Adjustment Model with Integral and Its Application to Super Resolu-tion Image Reconstruction[J].Acta Geodaetica et Cartographica Sinica,2015,44(7):747-752. |
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| Authors: | ZHU Jianjun FAN Donghao ZHOU Cui ZHOU Jinghong |
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| Institution: | School of Geosciences and Info-physics, Central South University, Changsha 410083, China |
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| Abstract: | The process of super resolution image reconstruction is such a process that multiple observations are taken on the same target to obtain low resolution images ,then the low resolution images are used to reconstruct the real image of the target ,namely high resolution image .This process is simil ar to that in the field of surveying and mapping ,in which the same target is observed repeatedly and the optimal values is calcul ated with surveying adjustment methods .In this paper ,the method of surveying adjustment is applied into super resolution image reconstruction .A integral nonlinear adjustment model for super resolution image reconstruction is proposed at first .And then the model is parameterized with a quadratic function .Finally the model is solved with the least squares adjustment method .Based on the proposed adjustment method , the specific strategy of image reconstruction is presented .This method for super resolution image reconstruction can make quantitative analysis of the results ,and avoid successfully ill‐condition problem ,etc .The results show that ,compared to the traditional method of super resolution image reconstruction ,this method has greatly improved the visual effects , and the PSNR and SSIM has also greatly improved ,so the method is reliable and feasible . |
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| Keywords: | super resolution image reconstruction integral nonlinear adjustment model gray function of object surface |
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