针对传统船舶图像去噪算法难以对图像的边缘细节进行保留和分析,以及传统非局部均值去噪算法相似框选择困难等问题,提出基于简单线性迭代聚类(simple linear iterative clustering,SLIC)超像素分割的非局部均值船舶图像去噪算法。通过S...针对传统船舶图像去噪算法难以对图像的边缘细节进行保留和分析,以及传统非局部均值去噪算法相似框选择困难等问题,提出基于简单线性迭代聚类(simple linear iterative clustering,SLIC)超像素分割的非局部均值船舶图像去噪算法。通过SLIC算法对图像进行分割处理,界定图像的纹理区域和平滑区域;使用相似框搜索和匹配策略,提升匹配效果,并适当保留更多边缘细节,从而改善图像去噪的效果。实验结果表明,所提出的算法相较于其他传统的船舶图像去噪算法不仅能很好地保留船舶图像的边缘细节特点,而且能在一定程度上提高船舶图像的峰值信噪比,具有良好的去噪效果,可以用于智能航海领域船舶图像的去噪。展开更多
Simple linear iterative cluster(SLIC) is widely used because controllable superpixel number, accurate edge covering, symmetrical production and fast speed of calculation. The main problem of the SLIC algorithm is its ...Simple linear iterative cluster(SLIC) is widely used because controllable superpixel number, accurate edge covering, symmetrical production and fast speed of calculation. The main problem of the SLIC algorithm is its under-segmentation when applied to segment artificial structure images with unobvious boundaries and narrow regions. Therefore, an improved clustering segmentation algorithm to correct the segmentation results of SLIC is presented in this paper. The allocation of pixels is not only related to its own characteristic, but also to those of its surrounding pixels.Hence, it is appropriate to improve the standard SLIC through the pixels by focusing on boundaries. An improved SLIC method adheres better to the boundaries in the image is proposed, by using the first and second order difference operators as magnified factors. Experimental results demonstrate that the proposed method achieves an excellent boundary adherence for artificial structure images. The application of the proposed method is extended to images with an unobvious boundary in the Berkeley Segmentation Dataset BSDS500. In comparison with SLIC, the boundary adherence is increased obviously.展开更多
由于简单线性迭代聚类(simple linear iterative clustering,SLIC)算法对含有相干斑噪声的合成孔径雷达(synthetic aperture radar,SAR)图像边缘分割不理想,提出了一种基于变差系数(coefficient of variation,CV)的SAR图像超像素分割算...由于简单线性迭代聚类(simple linear iterative clustering,SLIC)算法对含有相干斑噪声的合成孔径雷达(synthetic aperture radar,SAR)图像边缘分割不理想,提出了一种基于变差系数(coefficient of variation,CV)的SAR图像超像素分割算法。该算法首先对SAR图像进行各项异性高斯平滑预处理,使得图像相干斑得到平滑的同时边缘信息不被破坏;其次,采用CV估计边缘信息,使得图像的同质区与边缘区更容易区分;最后用加入边缘信息的SLIC算法进行聚类,生成超像素。实验结果表明:该算法在SAR图像分割下与3种经典超像素算法相比,其召回率至少提高了5%,且超像素个数大于400时,欠分割错误率降低了2%。该算法使得SAR图像超像素分割的准确度提高,其边缘和图像真实边缘更加贴切。展开更多
文摘针对传统船舶图像去噪算法难以对图像的边缘细节进行保留和分析,以及传统非局部均值去噪算法相似框选择困难等问题,提出基于简单线性迭代聚类(simple linear iterative clustering,SLIC)超像素分割的非局部均值船舶图像去噪算法。通过SLIC算法对图像进行分割处理,界定图像的纹理区域和平滑区域;使用相似框搜索和匹配策略,提升匹配效果,并适当保留更多边缘细节,从而改善图像去噪的效果。实验结果表明,所提出的算法相较于其他传统的船舶图像去噪算法不仅能很好地保留船舶图像的边缘细节特点,而且能在一定程度上提高船舶图像的峰值信噪比,具有良好的去噪效果,可以用于智能航海领域船舶图像的去噪。
基金Supported by Defense Industrial Technology Development Program(JCKY2017602C016)
文摘Simple linear iterative cluster(SLIC) is widely used because controllable superpixel number, accurate edge covering, symmetrical production and fast speed of calculation. The main problem of the SLIC algorithm is its under-segmentation when applied to segment artificial structure images with unobvious boundaries and narrow regions. Therefore, an improved clustering segmentation algorithm to correct the segmentation results of SLIC is presented in this paper. The allocation of pixels is not only related to its own characteristic, but also to those of its surrounding pixels.Hence, it is appropriate to improve the standard SLIC through the pixels by focusing on boundaries. An improved SLIC method adheres better to the boundaries in the image is proposed, by using the first and second order difference operators as magnified factors. Experimental results demonstrate that the proposed method achieves an excellent boundary adherence for artificial structure images. The application of the proposed method is extended to images with an unobvious boundary in the Berkeley Segmentation Dataset BSDS500. In comparison with SLIC, the boundary adherence is increased obviously.
文摘在雾霾天气下,由于空气中的浮尘等大气颗粒物对光线进行了散射吸收,造成成像设备捕捉到的图片的质量严重下降。针对雾霾天气下暗通道先验(dark channel prior,DCP)算法的图像复原方法中的边缘细节丢失、明亮区域使大气光估计失效、场景深度突变区域透射率计算不准确等问题,提出一种基于均值标准差与加权透射率(Mean-Standard Deviation and Weighted Transmission,MSD-WT)的图像去雾方法。对大气光估计方法进行改进,首先在HSV空间中提取图像的亮度分量,然后使用简单线性迭代聚类(simple linear iterative clustering,SLIC)对V空间图像和暗通道图像进行图像融合,避免小面积明亮区域对整体大气光估计造成影响。对透射率估计方法进行改进,在景物边缘处使用带阈值的均值标准差来判断是否为场景深度突变区域,在不同区域内使用加权的方法分类计算场景深度突变处的透射率。仿真结果表明:该方法计算的大气光值和透射率值更加准确,在边缘细节信息保留、去除边缘光晕效应和图像真实方面有较好的效果。
文摘由于简单线性迭代聚类(simple linear iterative clustering,SLIC)算法对含有相干斑噪声的合成孔径雷达(synthetic aperture radar,SAR)图像边缘分割不理想,提出了一种基于变差系数(coefficient of variation,CV)的SAR图像超像素分割算法。该算法首先对SAR图像进行各项异性高斯平滑预处理,使得图像相干斑得到平滑的同时边缘信息不被破坏;其次,采用CV估计边缘信息,使得图像的同质区与边缘区更容易区分;最后用加入边缘信息的SLIC算法进行聚类,生成超像素。实验结果表明:该算法在SAR图像分割下与3种经典超像素算法相比,其召回率至少提高了5%,且超像素个数大于400时,欠分割错误率降低了2%。该算法使得SAR图像超像素分割的准确度提高,其边缘和图像真实边缘更加贴切。
