An image multi-scale edge detection method based on anti-symmetrical bi-orthogonal wavelet is given in theory. Convolution operation property and function as a differential operator are analyzed,which anti-symmetrical...An image multi-scale edge detection method based on anti-symmetrical bi-orthogonal wavelet is given in theory. Convolution operation property and function as a differential operator are analyzed,which anti-symmetrical bi-orthogonal wavelet transform have. An algorithm for wavelet reconstruction in which multi-scale edge can be detected is put forward. Based on it, a detection method for small target in infrared image with sea or sky background based on the anti-symmetrical bi-orthogonal wavelet and morphology is proposed. The small target detection is considered as a process in which structural background is removed, correlative background is suppressed, and noise is restrained. In this approach, the multi-scale edge is extracted by means of the anti-symmetrical bi-orthogonal wavelet decomposition. Then, module maximum chains formed by complicated background of clouds, sea wave and sea-sky-line are removed, and the image background becomes smoother. Finally, the morphology based edge detection method is used to get small target and restrain undulate background and noise. Experiment results show that the approach can suppress clutter background and detect the small target effectively.展开更多
For the sustainable supply of mineral resources, blind deposits are becoming the emphasis of exploration after long-period exploitation of exposed deposits.The collection and analysis of gravity or magnetic data repre...For the sustainable supply of mineral resources, blind deposits are becoming the emphasis of exploration after long-period exploitation of exposed deposits.The collection and analysis of gravity or magnetic data represents one of the cheapest forms of large-scale geophysical exploration.With the identification of potential fields,we can get the map of worms or skeletonizations showing the three-dimension structure of shallow crust,and find the展开更多
For the sustainable supply of mineral resources, blind deposits are becoming the emphasis of exploration after long-period exploitation of exposed deposits.The collection and analysis of gravity or magnetic data repre...For the sustainable supply of mineral resources, blind deposits are becoming the emphasis of exploration after long-period exploitation of exposed deposits.The collection and analysis of gravity or magnetic data represents one of the cheapest ways of large-scale geophysical exploration.With the identification of potential mineral fields,we can get the map of worms or skeletonizations showing展开更多
针对传统单一的Canny算子在使用高斯滤波进行平滑处理时丢失大量边缘信息、无法保留大量图像细节的问题,提出一种基于Canny算子的图像边缘检测改进算法,弥补了传统算法在图像边缘检测中的不足.改进算法采用双边滤波代替传统高斯滤波,通...针对传统单一的Canny算子在使用高斯滤波进行平滑处理时丢失大量边缘信息、无法保留大量图像细节的问题,提出一种基于Canny算子的图像边缘检测改进算法,弥补了传统算法在图像边缘检测中的不足.改进算法采用双边滤波代替传统高斯滤波,通过控制双边滤波器权重参数来减少图像边缘信息的丢失;利用小波变换对图像高频系数进行放大,并缩小低频系数,增强图像细节;在配置了开源计算机视觉库的Microsoft Visual Studio 2010开发环境下,将增强后的边缘信息与传统算法的边缘信息进行比较,以验证其视觉效果及参数效果.结果表明,改进算法较传统算法具有明显优势.展开更多
基金Sponsored by China Postdoctoral Science Foundation (20060400400)
文摘An image multi-scale edge detection method based on anti-symmetrical bi-orthogonal wavelet is given in theory. Convolution operation property and function as a differential operator are analyzed,which anti-symmetrical bi-orthogonal wavelet transform have. An algorithm for wavelet reconstruction in which multi-scale edge can be detected is put forward. Based on it, a detection method for small target in infrared image with sea or sky background based on the anti-symmetrical bi-orthogonal wavelet and morphology is proposed. The small target detection is considered as a process in which structural background is removed, correlative background is suppressed, and noise is restrained. In this approach, the multi-scale edge is extracted by means of the anti-symmetrical bi-orthogonal wavelet decomposition. Then, module maximum chains formed by complicated background of clouds, sea wave and sea-sky-line are removed, and the image background becomes smoother. Finally, the morphology based edge detection method is used to get small target and restrain undulate background and noise. Experiment results show that the approach can suppress clutter background and detect the small target effectively.
文摘For the sustainable supply of mineral resources, blind deposits are becoming the emphasis of exploration after long-period exploitation of exposed deposits.The collection and analysis of gravity or magnetic data represents one of the cheapest forms of large-scale geophysical exploration.With the identification of potential fields,we can get the map of worms or skeletonizations showing the three-dimension structure of shallow crust,and find the
文摘For the sustainable supply of mineral resources, blind deposits are becoming the emphasis of exploration after long-period exploitation of exposed deposits.The collection and analysis of gravity or magnetic data represents one of the cheapest ways of large-scale geophysical exploration.With the identification of potential mineral fields,we can get the map of worms or skeletonizations showing
文摘针对传统单一的Canny算子在使用高斯滤波进行平滑处理时丢失大量边缘信息、无法保留大量图像细节的问题,提出一种基于Canny算子的图像边缘检测改进算法,弥补了传统算法在图像边缘检测中的不足.改进算法采用双边滤波代替传统高斯滤波,通过控制双边滤波器权重参数来减少图像边缘信息的丢失;利用小波变换对图像高频系数进行放大,并缩小低频系数,增强图像细节;在配置了开源计算机视觉库的Microsoft Visual Studio 2010开发环境下,将增强后的边缘信息与传统算法的边缘信息进行比较,以验证其视觉效果及参数效果.结果表明,改进算法较传统算法具有明显优势.
