共查询到19条相似文献,搜索用时 139 毫秒
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红外图像边缘检测的循环移位算法 总被引:2,自引:0,他引:2
提出一种基于Bezier曲线的红外图像边缘检测的循环移位算法。为抑制红外图像中的噪声的影响,利用Bezier曲线法平滑图像灰度直方图中的噪声,得到Bezier直方图。利用提出的“循环移位法”探测Bezier直方图曲率曲线的极大和极小值,确定分割阈值和量化灰度值,实现对原始红外图像的分割,对分割后的图像进行边缘检测。实验结果表明,新算法简单有效,在准确检测红外图像边缘信息的同时又能抑制图像中噪声的影响,定位精度高,而且能够得到单像素边缘,在性能上优于传统的几种边缘检测算子。 相似文献
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一种改进多尺度形态边缘检测算法 总被引:3,自引:0,他引:3
提出一种改进的多尺度形态边缘检测算法。用不同尺度大小的结构元素分别检测出图像的不同尺寸的边缘信息,运用本文提出的基于直方图配准的自适应方法对所获不同尺寸的图像边缘进行融合,获得理想的图像边缘,有效地消除了噪声。实验结果表明当图像中加入了强度超过20%的椒盐噪声后,检测到的边缘仍然非常清晰。 相似文献
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火灾探测中动态火焰的数字图像处理 总被引:4,自引:3,他引:1
通过模拟火灾实验,利用移动的CCD摄像头实现图像的动态获取与传输.重点研究火焰图像的阈值处理、边缘检测、链码提取等图像处理算法,并且运用Matlab语言编程处理实验图像,计算出火焰图像的面积、周长、圆形度等特征值,从而总结得出火灾发生时具有火焰面积增大、边缘抖动等特征,获得了早期火灾探测的重要判据. 相似文献
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本文主要对目前存在的图像边缘检测的方法进行了研究分析,重点研究了小波变换在图像边缘检测方而的优势,提出了基于连续小波变换的边缘检测方法,并编程展示编码的结果,验证其在实际应用中的可行性。 相似文献
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当前,基于计算机的图像边缘检测在各领域中占有重要环节,通过有效的边缘检测,可以大大简化后续图像处理过程对图像信息的分析工作。因此,基于FPGA的实时图像边缘检测的研究与设计已经倍受人们的关注。本文主要研究基于FPGA图像边缘检测的算法。 相似文献
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Koushlendra Kumar Singh Rajesh K. Pandey Prabhat Munshi 《Research in Nondestructive Evaluation》2017,28(3):150-167
Non invasive feature detection in wood based application requires exact discrimination between geometrical edges and texture. It has been found that traditional edge detection algorithms are highly sensitive to noise and texture and produces inferior results with wood. The present work encompasses a micro level reconstruction of Palash and Rosewood by using micro X-rays CT scanner. It also encompasses a new edge detection algorithm using newly constructed Chebyshev polynomial based fractional order differentiator. Transform based method has been used for reconstruction purpose. Newly designed fractional order filter has been applied on these reconstructed images. Chebyshev polynomial based fractional order differentiator has been used for filtering operation. Quadrature Mirror Filter (QMF) concept has been used for design of high pass filter and low pass filter. Preprocessing has been performed by using this filter. Canny edge detection algorithm has been used on this preprocessed image. The algorithm has been tested on two different test cases of wood images a) Palash and b) Rosewood. The effect of relaxation coefficient has also been presented and discussed. 相似文献
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本文主要针对彩色图像和灰色图像边缘检测的一些方法进行了对比。对于灰色图像根据不同方法的优缺点提出了一种基于数据融合的边缘检测的方法。该方法对原始图像分别采用sobel算子和小波变换两种方法进行边缘提取,然后采用加权平均的方法进行融合并且得到了边界更为清晰的边缘图像;对于彩色图像则分别对比了在RGB彩色空间直接计算梯度得到的边缘图像,以及在分量图像分别计算然后相加得到的梯度图像的边缘效果。 相似文献
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Chen Ping Pan Jin-Xiao Liu Bin 《Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment》2009,608(1):185-190
As one of the most useful modern detection technologies, Industrial Computed Tomography (ICT) image size measurement can correctly non-destructively measure the size of workpieces’ inner construction, and it is considered as the standard for quality assurance and reverse engineering. In view of the advantages and disadvantages compared to conventional methods, this paper improves the precision of image size measurement with a new algorithm that uses an approximate function to describe edge degradation. First, this algorithm constructs the approximate function and determines the optimal point of edge detection, based on image intensity and inflexions. Then, in order to accurately extract the image edge, this algorithm is used to revise the primary image, completing construction of the CT image.Excellent results are obtained from simulations and experiments. The experimental results indicate that the relative error is 2% for the CT image when the step evolution of the image edge is pooled. The relative error of this method is decreased by as much as 1.5% compared to wavelet transformation and ridgelet transformation. Therefore, this new algorithm demonstrates increased effectiveness in extracting an accurate measurement of the CT image edge. 相似文献
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