共查询到16条相似文献,搜索用时 109 毫秒
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图像边缘检测二维小波算法研究与实现 总被引:6,自引:0,他引:6
边沿作为图像视觉的最主要特征,成为图像信息获取的重要内容。小波变换具有检测局域突变的能力,而且可以结合多尺度信息进行检测,因此成为图像信息边缘检测的优良工具。根据二维小波变换的特点,分析了利用二维小波进行图像边缘检测的基本原理,并设计了利用二维小波变换进行多尺度边缘匹配的检测算法。基于研究结果,编写了计算机应用程序,进行实例分析。 相似文献
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基于小波变换和形态学的织物疵点边缘检测 总被引:1,自引:0,他引:1
为了精确确定织物疵点边缘,提出了一种基于小波变换和形态学的织物疵点边缘检测方法.在利用形态学实现疵点检测后,对其进行小波分解,用小波模极大值法和基于数学形态学的算法分别提取高低频子图像的疵点边缘,采用合理的融合规则将两个边缘图像进行融合.实验结果表明,该算法能有效地抑制噪声,且边缘清晰、准确,效果优于经典的边缘检测算法,具有可行性和有效性. 相似文献
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Canny准则小波边缘检测在图像融合中的应用 总被引:5,自引:0,他引:5
提出了一种新的图像融合方法。该方法选择Canny准则作为边缘检测的基础,并结合小波变换算法,确定图像边缘位置。在小波域中,对高频信息依据其是否为边缘点采用不同的融合策略,对低频信息利用加权法进行融合,再进行小波逆变换重构融合图像。实验结果表明,提出的算法在抑制噪声的同时,能有效地突出边缘细节,更好地保持图像的空间分辨力。对于多聚焦图像的融合,偏差度为0.0520,熵为7.6609,相似度达到0.9985。 相似文献
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为了能高速、高质量地进行图像边缘检测,提出了一种新的基于B样条插值的边缘检测方法.该方法采用了三次B样条插值原理,对图像的像素点灰度值进行插值运算,提出了基于B样条插值的一阶和二阶微分算子,并引入数字滤波技术加以实现.还利用B样条的可分离特性,实现了2维空间中基于B样条插值的连续图像的重构函数,在此基础上提出了用于边缘检测的基于3次B样条的一阶微分模板和二阶微分模板.设计出一套基于DSP FPGA的实时图像处理和显示系统. 相似文献
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Optical wavelet matched filter 总被引:1,自引:0,他引:1
A shift-invariant optical continuous wavelet transform is used for pattern recognition. We propose an Voptical wavelet matched filter that performs optical wavelet transforms for edge enhancement and the correlation between two wavelet transforms in a single step. This new bandpass matched filter shows improved discrimination capability with respect to the conventional matched filter and improved signal-to-noise ratio with respect to the phase-only matched filter. The wavelet matched filter provides flexibility of an adaptive choice of the scale factors of the wavelets that permit the selection of size and orientation of the smoothing function used in edge enhancement and the optimization of the performance of the filter. Optical experimental results are shown. 相似文献
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A new joint wavelet transform correlation-based technique is proposed for feature extraction such as the detection of edges in an unknown input scene. We exploited a modified version of the Roberts and the Sobel wavelet filters as reference images for extracting the edges of an unknown input scene. The performance of the proposed technique with the aforementioned wavelet filters is evaluated and compared by use of numerical simulations. For noise-free input scenes the Roberts wavelet filter was found to yield a superior output compared with that of the Sobel wavelet filter. However, for noisy input scenes the Sobel wavelet filter was found to yield a better output compared with the Roberts wavelet filter. 相似文献