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# Image Correlation

22 Threads found on edaboard.com: Image Correlation

## pixels in the same image are correlated but how can I visualize it?

I am new in image processing.I know that pixels in the same image are correlated with each other but I don't know how can I draw the relationship b/w these pixels in the form of graph?.

## implémentation of correlation 2D

I think the first step is you firstly define the math that will do the task, and after that, determine the size for the arrays. Are you concerning to perform something on scope of image pattern matching ?

## LTI Image Interpretation

How would you interpretate this image about LTI systems and

## correlation between tow image

dear all i ask about how i can do correlation between two image for same object using matlab depend on code not existed function because after understanding this point i will implement it on FPGA wait your reply thanks

## autocorrelation & crosscorrelation of image in matlab

hi, i want to find the auto correlation & cross correlation in horizontal ,vertical & in diagonal direction of the output image obtain after doing the quantization of image*(*this image is obtain after taking the FFT of image & then finding the magnitude of that image)in to (...)

## search for a function for ROI processing........

Unless works with a compiled function, this can be achieved directly at the array wich represents the image, throught a threshold function. +++

## Basic question about time series analysis

I am a beginner in signal processing so I apologize in advance if I end up using the wrong terminology. My goal is to find out correlated events in a set of time series data (image attached below) that I have. I figured that using cross-correlation, I will be able to do this. In the first image (the time series plot), I can clearly see that (...)

## MATLAB and webcam interface

download this source code Sagar's Lab: Object tracking using corss correlation ---------- Post added at 20:18 ---------- Previous post was at 20:16 ---------- use matlab image and video acquisition tool box. study t

## View as peak in Matlab

Good evening, With the aim of achieving a correlation, I need to create two images of size 256 * 256, which contains a letter F and serve as a target, while the other has two letters E and F showing the scene . I'm stuck in, how to center the letter F in the middle of the image, and how, after correlation, display (...)

## switch case in MATLAB

Hai Every time I get an image, I need to compare it with a lot of existing images and take an appropriate decision. But, the 'elseif' statement makes it very slow. But I cant use switch case because the switch expression needs to be a scalar or string. How can I do my comparison in a faster way? Please help. :-( Thanks

## Image Registeration using OpenCV

Hi All, I'm trying to find the movement between two different image for images' registration. In order to speed-up things, I'm trying to find the maximum of the cross-correlation of the two images. I'm using OpenCV - the cvDFT() to generate the two Fourier transforms and than, using the cvMulSpectrums() to obtaining the (...)

## Digital Image Processing(DIP) --books

Gonzales and Woods is a homily name in digital image processing. If you want further details then get DIP by A K Jain. the properties are mentioned in both of them. Seperability is nothing much complicated....its just that you split the 2-D transform to 2 1-D transfoems for reducing computaional complexity.

## Finding Unique area in an Image

You need find correlation of each part of image. Or find two dimension correlation, but this is the same. If your area can rotate and/or scale you need use affine transfer for your unique area. The same operation use fractal encoder.

## Problem in correlation template

Hello dears, I want to match a test image with the template image in MATLAB, For this task i am using normxcorr2 function for correlation, this function returns an array of correlation between template and test image. This function works fine when template image is a part or sub (...)

## asking for source code in matlab

i am doing a project on image wwater markin usin threshod based correlation. since i am a beginner in this field ineed help.. i need source code for visible water marking .please help.

## Pattern Recognition(Matlab)

Hi, Template is the pattern you want to find in the image. For example if you are looking for circles in an image, a smaller image containing only a circle is the template. Once you calculate the cross-correlation between a template T and an image I, you obtain an image X. The (...)

## I really need your help about paper simulation

I want to simulate this paper:"RST Invariant Digital image Watermarking Based on Log-Polar Mapping and Phase correlation".but I have some question about the algorithm.could you help me please? Link to paper :

## Looking for tutorials on image blending and mosaicing

Hi, Do you just simply needing some software to develop it? Or do you have need for help in developing the software? If it is the software, basically mosaicking consist of 3 parts 1) Find correlation between points in two image 2) Find the projective geometry that will map one into another. Then map onto the enlarged canvas with the two o

## face recognition using normxcorr2(I,J) function

Hi, I am a third year mechanical engineering student and have been assigned to design matching algorithm based on image "correlation" using matlab. I am free to research and inspire myself from any source code I can find, as I will be awarded with marks for research. The problem is I must use the matlab function normxcorr2(I,J) and i can't seem to

## Rayleigh Fading in Matlab.

To generate a Rayleigh fading channel model, you first generate real and image part of the independent Gaussian process, then you need design a filter to have the spretrum similar to Jakes model, i.e, to have the Bessel function as the auto-correlation. Passing through the I, Q Gaussian process to this filter, you oculd get the Rayleigh fadung mode

## Face modeling using Elastic Body spline technique

I need matlab code for correlation coefficient. In Elastic Body Spline Technique for feature point generation and face modeling, I am in need to locate a face from test image(with background). To locate face only,correlation coefficient is used for similarity measure between facial template and test image(with (...)

## Looking for papers about cmos image sensor

I need some material about signal read-out ciutui about cmos image sensor.such as the desing of output amplifier ,sample-hold circuit (CDS--correlation double sample) ant their power and noise analysis. Do you have?If you do ,I will be very grateful if you could share them with me !