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wavelet-sofm
- 本文运用了神经网络中的自组织向量机和小波变换相结合,实现了图象的压缩,通过训练样本,得到好的结果-In this paper, the neural network of self-organizing vector machine and wavelet transform combining image compression achieved through the training samples obtained good results
som
- MRI Brain Tumour Classification - SOM ( Self Organized Map)-MRI Brain Tumour Classification- SOM ( Self Organized Map)
wavelets
- 未调用MATLAB系统函数,自编函数实现小波变换-System did not call the MATLAB function, self-realization of wavelet transform function
test1
- 在某个音乐厅内,原始音频信号的回音由于墙壁和天花板等的反射而产生,听众所感受到的音频信号是 和它的回音的合成。令y(n)=x(n)+ax(n-k),其中x(n)=cos(0.3pin)+0.5cis(0.6pin),a=0.1,k=50.产生100个样本,使用Matlab工具,求出其自相关,从中观测确定a和k. -In a concert hall, the original audio signal echo the walls and ceilings due to the reflec
10.1.1.139.6915
- PERCEPTUAL OPTIMIZATION OF WAVELET IMAGE COMPRESSION NASA’s extensive image compression requirements may be met in part by the use of wavelet techniques.1 Wavelets form a large class of signal and image transforms, generally characterized by de
10.1.1.165.9124
- Scaling, wavelets, image compression, and encoding NASA’s extensive image compression requirements may be met in part by the use of wavelet techniques.1 Wavelets form a large class of signal and image transforms, generally characterized by de
pandi
- 在理论分析的基础上,着重采用Fox-Li数值迭代法计算了平平腔振荡模式的振幅分布和相位分布。计算结果表明,在经过300 次渡越后,归一化的振幅分布和相位分布实际上已不再发生变化,镜面中心处振幅最大,从中心到边缘振幅逐渐降落,镜面已不再是等相位面了。但对于菲涅尔数较大的平行平面腔,特别是在镜面中心及其附近,平面波是很好的近似,只有在镜的边缘处,波前才发生弯曲。则已找到光腔的一个自再现模式或横模分布。另一方面,分析了腔镜倾斜扰动对平平强腔内振荡模式的影响。数值计算表明,腔镜倾斜破坏了场分布的对称性,
Image-zoom---modified-WT
- 实现文章 李根.基于小波变换修正的双线性图像插值图像放大方法,信息技术,2010.9 一文的仿真。包括自编的双线性插值和最近邻插值方法。-Lee, realize the article based on wavelet transform image modified bilinear interpolation method of image magnification, information technology, article 2010.9 of the simulation. In
experiment4_b2
- 对一幅灰度图像,实现用Haar小波、Db2、Db3小波的分解与重构(使用自编函数)-A grayscale image, using the Haar wavelet, Db2, DB3 wavelet decomposition and reconstruction (using the self function)
experiment4_c2
- 对一幅灰度图像,实现用Haar小波、Db2、Db3小波的分解与重构(并对小波系数进行变换)(使用自编函数)-A grayscale image, using the Haar wavelet, Db2, DB3 wavelet decomposition and reconstruction (and the wavelet coefficients transform) (using the self function)
AGabor
- 根据别人小波边缘检测,修改的一个实现纹理方向检测,可以自行设置方向数-Under the others Wavelet Edge Detection, modify a texture direction detection, set the direction of the number of self-
experiment3
- 自编1d数字信号的频域分析,包含FFT/DCT等,是经典的课程实验程序-Frequency domain analysis self 1d digital signal, including FFT/DCT, is a classic course experimental procedure
Mechanical-fault-diagnosis-method
- 经验小波变换(EWT)是一种新的自适应信号分解方法, 该方法继承了EMD 和小波分析方法的各自优点, 通过提取频域极大值点自适应地分割傅里叶频谱以分离不同的模态, 然后在频域自适应地构造带通滤波器组从而构造正交小波函数, 以提取具有紧支撑傅立叶频谱的调幅-调频(AM-FM)成分。本文将该方法引用到机械故障诊断中, 提出了一种基于经验小波变换的机械故障诊断方法, 并与EMD方法进行了对比分析。仿真结果表明, 经验小波变换方法明显优于EMD方法, 能有效地分解出信号的固有模态。与EMD 相比较, 该
