为了实现外界光照变化或相机积分时间自动调节等情况下拍摄的彩色序列图像的超分辨率重建,文章首先提取图像感兴趣区域的方向梯度直方图作为匹配特征,以相关系数作为相似性测度进行几何配准;其次建立光度测量模型进行光度配准;最后采用最大后验估计算法求出光度改善的高分辨率图像.文章采用平均梯度、信息熵、图像对比度对重建图像质量进行评估.实验表明,重建后高分辨率图像平均梯度及信息熵均有大幅提高,图像更清晰、信息更丰富.算法能有效减小重建图像间的光度差异,提高彩色图像的对比度,对光度变化具有一定的鲁棒性.
参考文献
| [1] | Park S C,Park M K,Kang M G.Super resolution image reconstruction:a technical overview[J].IEEE Signal Processing Magazine,2003,20(3):21-36. |
| [2] | Mairal J,Elad M,Sapiro G.Sparse representation for color image restoration[J].IEEE Transactions on Image Processing,2008,17(1):53-69. |
| [3] | Gunturk B K,Gevrekci M.High-resolution image reconstruction from multiple differently exposed images[J].IEEE Signal Process Letters,2006,13(4):197-200. |
| [4] | Capel D,Zisserman A.Computer vision applied to super resolution[J].IEEE Signal Processing Magazine,2003,20(3):75-86. |
| [5] | WenYi Zhao,Sarnoff C.Super-resolution with significant illumination change[C]// Proc.Int.Conf.Pattern Recognition,Singapore:Image Processing,2004:1771-1774. |
| [6] | 曹治国,吴博.采用HOG特征下的视景象匹配算法[J].红外与激光工程,2012,41(2):514-516.Cao Z G,Wu B.Approach on scene matching based on histograms of oriented gradients[J].Infrared and laser engineering,2012,41(2):514-516.(in Chinese) |
| [7] | Dalal N,Triggs B.Histogram of oriented gradients for human detection[C]//International Conference on Computer Vision and Pattern Recognition,San Diego,USA:Computer Vison and Pattern,2005,2:886-893. |
| [8] | Schultz R R,Meng L.Subpixel motion estimation for super-resolution image sequence enhancement[J].Journal of Visual Communication and Image Representation,1998,9(1):38-50. |
| [9] | 江静,张雪松.图像超分辨率重建算法综述[J].红外技术,2012,34(1):24-30.Jiang J,Zhang X S.A review of super-resolution reconstruction algorithms[J].Infrared Technology,2012,34(1):24-30.(in Chinese) |
| [10] | 张剑.图像超分辨率重建问题研究[D].长沙:中南大学,2010.Zhang J.Research on super resolution reconstruction of images[D].Changsha:Central South University,2010.(in Chinese) |
| [11] | 邓建青,刘晶红,刘铁军.基于DSP系统的超分辨率图像重建技术研究[J].液晶与显示,2012,27(1):114-119.Deng J Q,Liu J H,Liu T J.Super-resolution image reconstruction technology based on DSP system[J].Chinese Journal of Liquid Crystals and Displays,2012,27(1):114-119.(in Chinese) |
| [12] | Yuan Y H,Zhang J J,Chang B K,et al.Objective quality evaluation of visible and infrared color fusion image[J].Optical Engineering,2011,50(3):033202(1-11). |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%