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How to extract the random shift intensity difference a 3D array elements in MATLAB?


By : Ahsan Javaid
Date : October 14 2020, 02:15 PM
help you fix your problem As the comment by @user630317 points out, for a 3D image, u should be a 3D vector.
Also, the image is 'voxelized' i,e, discrete. Therefore x is a vector with integer entries and units as voxels (not mm). Elements of u may or may not be an integer but has units as voxels. If u has fractional elements than would would have to do interpolate the fractional shifts and would lose information.
code :
I = randn(3,3,3);
u = [1.5,1,1];
I2 = imtranslate(I,u);


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How to shift elements of an array to the left without using loops in matlab?


By : Custom Code
Date : March 29 2020, 07:55 AM
I wish this helpful for you I have a fixed sized array in Matlab. When I want to insert a new element I do the following: , I'm not sure I understand your question, but I think you mean this:
code :
A = [ A(1:pos) newElem A((pos+1):end) ]
A = [ A(2:end) newElem ]

Matlab: Elegant way to extract (split) array elements


By : MasterBabble
Date : March 29 2020, 07:55 AM
Hope this helps I have to split, from an array (1D), in blocks of 64, the first element (DC), and another 63 elements (AC) in separate arrays. , You can simply reshape it:
code :
res = reshape( zigZagLinha, 64, [] ); % assuming num of elements can be divided by 64 exactly 
% otherwise some padding should be done...
DC = res(1 ,: ); % collect all first elements
AC = res( 2:end, : ); % AC elements

How to extract elements of an array with a fixed step (matlab)


By : nala
Date : March 29 2020, 07:55 AM
hope this fix your issue You can reshape your data so that each column represents one day. That would give you a 48 x 17 x 31 matrix:
code :
dailymatrix = reshape(bigmatrix, 48, 17, 31);
night_data = dailymatrix([1:8, 46:48], 1, 27);
                                   %   ^-- 1st day
day_data = dailymatrix([22:32], 1, 27);
night_data = dailymatrix([1:8, 46:48], 2, 27);
                                   %   ^-- 2nd day
day_data = dailymatrix([22:32], 2, 27);
night_data = dailymatrix([1:8, 46:48], :, 27);
day_data = dailymatrix([22:32], :, 27);

Matlab random elements from array


By : Prakash
Date : March 29 2020, 07:55 AM
Any of those help Say you have a matrix A:n by m, you can choose two elements at random as following,
code :
A=[2 7 8;5 4 6;8 3 11];%given array
[n m]=size(A);
x=2;%two different random elements 
i=randperm(n,x)%row index for x elements
j=randperm(m,x)%column index for x elements
A(i(1),j(1)) %First random element
A(i(2),j(2)) %Second random element
i =

 2     3
 2     1
 4
 8

Normalize intensity of series of images to obtain constant intensity- Matlab


By : pawan sharma
Date : March 29 2020, 07:55 AM
this will help Try normalizing so that the mean is 0 and the variance is 1. This is a common technique for making intensity images invariant to illumination changes, provided they are of the same scene. If you recall from probability theory, this is performed by obtaining the Z-score:
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