calculating euclidean distance

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FIR
FIR 2012-2-17
评论： NAVEEN KUMAR 2017-4-27
I have a dataset of images(175images),i have found the mean of that and have saved,next i have query image from dataset,now i want to calculate euclidean distance and want to retrieve that image,
i did
for n=1:175; Distance=EuD( Features{1,n},FeaturesQuery); D{n}=Distance;
end
i get error as
Cell contents assignment to a non-cell array object.
Error in ==> MAIN at 116 D{n}=Distance; please help
Features=<1x175 cell>
FeaturesQuery=104.8872
please help

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回答（2 个）

Tom Lane
Tom Lane 2012-2-17
It is likely that you have assigned D to some value, perhaps a plain numeric value, earlier in the function. So it is not a cell array, and you can't assign into it using cell array notation. Just before you start the loop in which you want to assign into cells of D, try inserting either of the following lines:
clear D
D = cell(1,175);
Image Analyst
Image Analyst 2012-2-17
I just did this:
for n=1:175
Distance=10; %EuD( Features{1,n},FeaturesQuery);
D{n}=Distance;
end
and it ran fine. I didn't even preallocate D to be a cell array of length 175. No errors or warnings whatsoever. Now, we don't know what EuD returns but I thought you could toss anything you wanted into a cell so I'm not sure why the "D{n}=Distance" line would complain, regardless of what class type Distance was. Let me ask you, what class type and/or value does Distance have?
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FIR
FIR 2012-2-18
Yesterday ur code did not work,but now its working,may be i have not used clear D ,i have extracted features of 40 images and stored,and gave a taken query image ,and have extracted same features,now i want to compare those and if it is from same dataset ,the retrieved image and query image must be displaed,if it not from same dataset ,"Image not found "
NAVEEN KUMAR
NAVEEN KUMAR 2017-4-27
Sir i need a solution to the above query please help me out

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