From: Prashant sangulgi on 12 Aug 2010 02:59 clc; close all; clear all; A=imread('PG1.JPG'); %B=mean2(X); %disp(B); %A = rand(1,280); %var(A) %var(A(:)) K = cov(double(A)); disp(K); i am getting the error as ??? Error using ==> cov at 37 Inputs must be 2-D. Error in ==> PRS at 10 K = cov(double(A));
From: ImageAnalyst on 12 Aug 2010 07:05 It's probably a 3D image because it's probably a rgb color image. Convert it to 2D gray with rgb2gray().
From: Prashant sangulgi on 12 Aug 2010 08:10 "Prashant sangulgi" <psangulgi(a)gmail.com> wrote in message <i4063q$rij$1(a)fred.mathworks.com>... > clc; > close all; > clear all; > A=imread('PG1.JPG'); > %B=mean2(X); > %disp(B); > %A = rand(1,280); > %var(A) > %var(A(:)) > K = cov(double(A)); > disp(K); > > > i am getting the error as > ??? Error using ==> cov at 37 > Inputs must be 2-D. > > Error in ==> PRS at 10 > K = cov(double(A)); i have sent a message to you with the image what i have used.... Let me ask something to you that what are the steps required in getting the image fusion using PCA.... I mean whether to take both the images at a time or at different instant....
From: ImageAnalyst on 12 Aug 2010 12:12 I don't know. Well, er, rather, I'm not going to do a brain dump of all I know on the subject here. I suggest you do some research, like a web search on "PCA images." Sorry, but I don't have any demo code to help you with PCA. I don't monitor that email address and replying from it is impossible (it's just a spam prevention account).
From: Walter Roberson on 12 Aug 2010 16:32 Prashant sangulgi wrote: > "Prashant sangulgi" <psangulgi(a)gmail.com> wrote in message > <i4063q$rij$1(a)fred.mathworks.com>... >> clc; >> close all; >> clear all; >> A=imread('PG1.JPG'); >> %B=mean2(X); >> %disp(B); >> %A = rand(1,280); >> %var(A) >> %var(A(:)) >> K = cov(double(A)); >> disp(K); >> >> >> i am getting the error as >> ??? Error using ==> cov at 37 >> Inputs must be 2-D. >> >> Error in ==> PRS at 10 >> K = cov(double(A)); > i have sent a message to you with the image what i have used.... Let > me ask something to you that what are the steps required in getting the > image fusion using PCA.... I mean whether to take both the images at a > time or at different instant.... First you start by defining what you mean by the covariance of a 3 dimensional array. Covariance over XY, XZ, YZ, or something else?
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