在信号处理中,互相关(Cross-correlation)可以测量两个信号之间的相似性,通过得到滞后函数,寻找局部最大值得到信号间的相对位移: 左图两个正弦信号,信号之间存在一定延迟。通过计算两个信号间的互相关,寻找互相关的最大值,即可得到信号之间的位移值。 扩展到二维图像,通过二维的互相关,可以得到两幅图片在空间(X,Y)...
优化的目标是最小化两个图像之间的差异度量,例如最小化归一化互信息(Normalized Mutual Information)或最大化互相关系数(Cross-Correlation Coefficient)。恶魔力(Demons Force)定义了变形场中每个像素点的位移方向和大小。它基于图像间的灰度差异,使得在配准过程中图像更加一致。广泛应用于医学影像领域,如MRI、CT等图像...
虽然卷积层得名于卷积(convolution)运算,但我们通常在卷积层中使用更加直观的互相关(cross-correlation)运算。在二维卷积层中,一个二维输入数组和一个二维核(kernel)数组通过互相关运算输出一个二维数组。 我们用一个具体例子来解释二维互相关运算的含义。如下图所示,输入是一个高和宽均为3的二维数组。我们将该数组...
Cross CorrelationAutoCorrelation -- 2D Pattern Identification Written by Paul Bourke August 1996 Cross correlation is a standard method of estimating the degree to which two series are ... 数学狂想曲(五)——概率分布(2), 自相关&互相关&卷积 ...
tform = imregcorr(___,Name=Value) enables you to specify the cross correlation method as phase correlation, and to enable or disable windowing for phase correlation, using name-value arguments. [tform,peakcorr] = imregcorr(___) also returns the peak correlation value, peakcorr.Examples...
2D CORRELATION SPECTROSCOPY AND ITS APPLICATION IN VIBRATIONAL SPECTROSCOPY USING MATLABTomas PazderkaVladimir Kopecky
二维互相关(cross-correlation)运算的输入是一个二维输入数组和一个二维核(kernel)数组,输出也是一个二维数组,其中核数组通常称为卷积核或过滤器(filter)。卷积核的尺寸通常小于输入数组,卷积核在输入数组上滑动,在每个位置上,卷积核与该位置处的输入子数组按元素相乘并求和,得到输出数组中相应位置的元素。图1展示了...
With this procedure all the image points are used to compute the upsampled cross-correlation in a very small neighborhood around its peak. This algorithm is referred to as the single-step DFT algorithm in [1]. [1] Manuel Guizar-Sicairos, Samuel T. Thurman, and James R. Fienup, ...
MATLAB Online에서 열기 Hey, how can I correct an image for lense distortion using a reference image and control points and perform a cross correlation between the two images afterwards? I feel like the code that I have used is not the best way to do it... ...
Ncorr is an open source 2D digital image correlation MATLAB program. It has an accessible and intuitive GUI, uses many novel 2D DIC algorithms, is wholly contained within the MATLAB environment, and contains plotting tools for figure creation. The compute intensive algorithms are optimized through ...