Sparse representation has attracted extensive attention and performed well on image super-resolution（SR） in the last decade. However, many current image SR methods face the contradiction of detail recovery and artif...Sparse representation has attracted extensive attention and performed well on image super-resolution（SR） in the last decade. However, many current image SR methods face the contradiction of detail recovery and artifact suppression. We propose a multi-resolution dictionary learning（MRDL） model to solve this contradiction, and give a fast single image SR method based on the MRDL model. To obtain the MRDL model, we first extract multi-scale patches by using our proposed adaptive patch partition method（APPM）. The APPM divides images into patches of different sizes according to their detail richness. Then, the multiresolution dictionary pairs, which contain structural primitives of various resolutions, can be trained from these multi-scale patches.Owing to the MRDL strategy, our SR algorithm not only recovers details well, with less jag and noise, but also significantly improves the computational efficiency. Experimental results validate that our algorithm performs better than other SR methods in evaluation metrics and visual perception.展开更多
提出了联合多分辨率表示的合成孔径雷达(SAR)目标识别方法。该方法首先根据SAR图像的成像机理构造原始图像的多分辨率表示。多分辨率表示以互补的方式由粗到精地描述了目标的特性,可以为后续的目标识别提供更丰富的鉴别力信息。为了充...提出了联合多分辨率表示的合成孔径雷达(SAR)目标识别方法。该方法首先根据SAR图像的成像机理构造原始图像的多分辨率表示。多分辨率表示以互补的方式由粗到精地描述了目标的特性,可以为后续的目标识别提供更丰富的鉴别力信息。为了充分利用多分辨率表示中蕴含的信息,采用联合稀疏表示对其进行分类。作为一种多任务学习算法,联合稀疏表示既可以有效表示各个分辨率上的表示还可以充分发掘各个分辨率之间的内在相关性。因此,结合多分辨率表示和联合稀疏表示分类器可以有效提高SAR目标识别性能。基于MSTAR(moving and stationary target acquisition and recognition)公共数据集在多种操作条件下进行了目标识别实验,充分验证了方法的有效性。展开更多
文摘Sparse representation has attracted extensive attention and performed well on image super-resolution（SR） in the last decade. However, many current image SR methods face the contradiction of detail recovery and artifact suppression. We propose a multi-resolution dictionary learning（MRDL） model to solve this contradiction, and give a fast single image SR method based on the MRDL model. To obtain the MRDL model, we first extract multi-scale patches by using our proposed adaptive patch partition method（APPM）. The APPM divides images into patches of different sizes according to their detail richness. Then, the multiresolution dictionary pairs, which contain structural primitives of various resolutions, can be trained from these multi-scale patches.Owing to the MRDL strategy, our SR algorithm not only recovers details well, with less jag and noise, but also significantly improves the computational efficiency. Experimental results validate that our algorithm performs better than other SR methods in evaluation metrics and visual perception.
文摘提出了联合多分辨率表示的合成孔径雷达(SAR)目标识别方法。该方法首先根据SAR图像的成像机理构造原始图像的多分辨率表示。多分辨率表示以互补的方式由粗到精地描述了目标的特性,可以为后续的目标识别提供更丰富的鉴别力信息。为了充分利用多分辨率表示中蕴含的信息,采用联合稀疏表示对其进行分类。作为一种多任务学习算法,联合稀疏表示既可以有效表示各个分辨率上的表示还可以充分发掘各个分辨率之间的内在相关性。因此,结合多分辨率表示和联合稀疏表示分类器可以有效提高SAR目标识别性能。基于MSTAR(moving and stationary target acquisition and recognition)公共数据集在多种操作条件下进行了目标识别实验,充分验证了方法的有效性。
