how to find Euclidean distance in matlab?

28 views (last 30 days)
hi i have extracted the feature of the 1000 images by using color Correlogram & saved it in a .mat file, now i want to match some query image(consist of .mat file) with this data base by using Euclidean distance for image retrieval.but i don't know how to find the Euclidean distance between 1000 data base images & one query image. thanks
  1 Comment
ganesh s
ganesh s on 2 Dec 2011
want to find Euclidean distance between 1000 images(.mat file)& one query image (.mat file) in MATLAB

Sign in to comment.

Accepted Answer

Junaid on 2 Dec 2011
Dear what is the size of your feature vector, if it is column vector then let say your have 1000 feature vector of 1000 images. I denote it by D, where each column is feature vector of each image, in short column represent single image. and your Query image is Q is single column vector.
it can be computed as simple as;
Q= repmat(Q,1,size(D,2));
E_distance = sqrt(sum((Q-D).^2));
now E_distance is euclidean matrix distance. where each cell is distance of Query with database image.
ganesh s
ganesh s on 2 Dec 2011
thanks again junaid
i already concatenate the all 1000 images in two one column matrix of size(1000x1)with each row represent the extracted image of size(4096x48)now i want to take one query image of size 4096x48(my original image is of size 384x256 after extracting feature by correlogram method it become 4096x48 ) and want to find it's euclidean distance for image retrieval

Sign in to comment.

More Answers (3)

divya r
divya r on 15 Jun 2012
How did you concatenate data from multiple matfiles into one? I have done it fr only 2 .mat files, but i am stuck in the logic for multiple .mat files. Could you please help me out with the logic?
Htet Yamin Ko Ko
Htet Yamin Ko Ko on 11 Oct 2017
Edited: Walter Roberson on 11 Oct 2017
if exist('feat.mat')
load feat.mat
else feat= [];
feat = [feat,featVec]; % you should use ; for row vectors and , for column vectors
save feat.mat feat
feat.mat is my existing .mat file and featVec is my current extracted feature vector. I hope it helps you.

Sign in to comment.

Dodo Dodda
Dodo Dodda on 18 May 2016
I have a data set of 160 images, and i extracted features of these images and saved them in .mat file, now i want to match between features of another image and all features that i saved in the .mat file. How i can do this using eulidean distance algorithm?

k p
k p on 21 Sep 2016
i have two is shifted and one is main i have to find the shift of whole image in x direction and y direction how can i find? only two values i want in point pixel in c.
  1 Comment
Walter Roberson
Walter Roberson on 21 Sep 2016
Please start a new Question for this matter. It does not have anything to do with this Euclidean Distance topic.

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!