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Application_study_of_wavelet_analysis_on_ultrasoni
说明: :在深海采矿环境中超声波传输介质里存在着大量气泡、扰动沉积物、机械噪声等背景噪声与混响,导致有用信号与高
噪声信号迭加在一起,严重影响了测距精度。采用小波分析方法将超声回波信号进行3层小波分解,适当设置门限阈值对小波
系数进行处理,然后对信号进行重构,有效地抑制了信号中噪声对测量精度的影响。研究结果表明:小波方法有很好的降低回
波信号中噪声的效果,其测距精度高于自适应滤波去噪后的测距精度。(There are much background and mixture noise in the course of ultrasonic wave transmission under deep
sea mining environment,such as air bubbles and disturbed sediment and mechanical noise.Because of these factors,
the useful signals and the high noise signals are combined together,which seriously affects the distance measurement
precision.Ultrasonic echo signals are decomposed into three layer wavelets,and a threshold is set to process the
wavelet coeficients.Then the signals are reconstructed.Accordingly the influence of environment noise on distance
measurement precision is effectively restrained.Research resuhs indicate that wavelet transform method is very useful
for noise reduction in signals.Its precision is higher than that of the adaptive filtering method.)
- 2010-04-24 08:14:49下载
- 积分:1
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txzengqiang
图像增强的matalab程序,里面有基于小波的,contourlet变换的,拉普拉斯塔等的增强,比较详细,有说明文件里面(Matalab image enhancement procedures, which have based on the wavelet, contourlet Transform, etc.拉普拉斯塔enhanced, more detailed, it has documentation)
- 2007-08-30 17:13:30下载
- 积分:1
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algorithm-of-findpath
绣花问题是连续型的填充,在不同区域的缝制过程中,缝针不能提针,因此不能用一般的离散型区
域填充方法处理。本文运用几何计算和图论理论提出了一个绣花缝针轨迹自动生成算法:先对轮廓走向进行
定义,通过轮廓铅垂方向的局部极值点的分割线将图案从上向下进行分割,采用交点的特征值比较彻底的解
决了分割时的重点问题,将图案区域准确的划分成缝针能一次完成的若干个节点。在此基础上根据节点的邻
接关系建立节点的邻接“图”,通过图论中半哈密尔顿路径或深度遍历方法找到节点的遍历(缝制)序列和每
个节点的缝制方向,最后可对设定的起点、终点和缝针间隔的条件自动提供缝针的走向轨迹。(In the process of embroidering, needle can not hang up for changing to a different area. Therefore, Embroider
problem could be abstract as a continuous area-filling work. Considering disperse area-filling methods can not process this
problem well. Based on geometry computing and graph theory, an algorithm of finding path of embroidering needle are
proposed in this paper. First, outline orientations are defined, and finding all local extreme points of inner outline on their
gravitational orientation to build sectioning lines so as to divide the picture. By using intersection point character the
overlap point problem was solved perfectly. Therefore, the picture is divided into some nodes which can be finished alone.
Then, based on connections of these nodes, an adjacency graph of nodes was built. Using half-Hamilton path or depth-first
search method, both embroidering sequence and direction of these nodes could be got from the graph. Finally, from a
defined start-point, end-point)
- 2012-12-09 23:26:22下载
- 积分:1
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6s
说明: 遥感图像运用6S工具来进行大气辐射校正处理(Atmospheric Radiation Correction Processing Using 6S Tool for Remote Sensing Images)
- 2019-06-20 18:12:10下载
- 积分:1
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myASM
说明: 自己写的Active Shape Model face segmentation 代码 (Write their own Active Shape Model face segmentation code)
- 2008-10-28 19:27:07下载
- 积分:1
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facedetect521
人脸检测
通过肤色建立模型,和计算欧拉数开运算等一系列处理可以检测出同一张图片中的多个人脸!效果不错哦(face detection through color model building, and calculation of Euler number opened a series of processing operations can be detected with a picture of the personal face! Oh, good results)
- 2007-06-07 00:11:12下载
- 积分:1
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hsv_shadow
基于阴影形成的原理及阴影区域的特点,研究阴影区域的特征表示方法;
基于阴影区域特征设计或改进阴影检测方法,检测出户外图像中的阴影区域;
在检测出阴影区域的基础上,研究阴影去除方法;
编程实现相关方法并进行实验验证及分析。(Shadow detection and removal of single image)
- 2017-04-25 21:36:57下载
- 积分:1
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img_resample
IDL中的批量重采样,可以省很多时间,根据自己的需求,采样成不同分辨率的图像。(IDL in batch resampling, you can save a lot of time, according to their needs, a different sampling resolution images.)
- 2020-10-14 15:27:30下载
- 积分:1
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pipeijiao
BBO I类匹配角计算
通过修改相应的参数可以计算其他负单轴晶体的I类匹配角(BBO Class I match angle calculated by modifying the parameters can be calculated other negative uniaxial crystals Class I match angle)
- 2007-05-07 16:52:58下载
- 积分:1
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ContrastSeg
一种改进的对比度分割算法。对红外图像有很好的分割效果。(an improved contrast ratio segmentation algorithm. The infrared image segmentation is a good result.)
- 2006-07-19 10:22:28下载
- 积分:1