i had converted image into blocks. I converted blocks to linear array. Next i calculated mean values for first 8 arrays as given below. now i want to convert mean values to linear array again. please send suitable code. please don't ignore it. help .
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for i=1:4:16
for j=1:4:16
block=I(i:i+3,j:j+3);
%convert 4X4 into 16X1 column vector
tv(:,col)=reshape(block,16,1);
col=col+1;
count=count+1;
column=column+4;
end
row=row+4;
end
%find mean of 8 arrays
nn=8;
for count=1:16
sum1=sum1+tv(:,count);
if count==nn*nnn
cv(:,r)=sum1/8;
sum1=0;
nnn=nnn+1;
r=r+1;
end
end
2 Comments
Star Strider
on 27 Mar 2016
You cannot un-fry that egg.
Calculating a mean — even with the standard deviation — requires that you throw away information that you can never again retrieve. The best you can hope for is a vector the same size as the original, every element being the mean.
Accepted Answer
Walter Roberson
on 27 Mar 2016
Your code does not calculate mean values -- not unless nnn happens to equal 1, and for some odd reason you only want the first 8 values to be included even though your loop goes to 16.
9 Comments
Image Analyst
on 3 Apr 2016
If you're in a loop, just have the upper limit be 8 and it will only do 8
for blockNumber = 1 : 8
% code
stdDev(blockNumber) = std(............
end
More Answers (1)
Image Analyst
on 27 Mar 2016
Exactly what values are you hoping to have in this second linear array? If you want the first ones, simply use the original values
secondLinearArray = firstLinearArray;
If you want the means, then use repmat, imresize, or other approaches to create it from your means, for example
secondLinearArray = theMean * ones(size(firstLinearArray));
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