# how to find Euclidean distance in matlab?

17 ビュー (過去 30 日間)
ganesh s 2011 年 12 月 2 日

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 件のコメント表示非表示 なし
ganesh s 2011 年 12 月 2 日
want to find Euclidean distance between 1000 images(.mat file)& one query image (.mat file) in MATLAB

サインインしてコメントする。

### 採用された回答

Junaid 2011 年 12 月 2 日
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.
##### 3 件のコメント表示非表示 2 件の古いコメント
ganesh s 2011 年 12 月 2 日
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

サインインしてコメントする。

### その他の回答 (3 件)

divya r 2012 年 6 月 15 日
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?
##### 2 件のコメント表示非表示 1 件の古いコメント
Htet Yamin Ko Ko 2017 年 10 月 11 日

if exist('feat.mat')
else feat= [];
end
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.

サインインしてコメントする。

Dodo Dodda 2016 年 5 月 18 日
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?
##### 1 件のコメント表示非表示 なし
Walter Roberson 2016 年 5 月 18 日
pdist2()

サインインしてコメントする。

k p 2016 年 9 月 21 日
i have two image.one 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 件のコメント表示非表示 なし
Walter Roberson 2016 年 9 月 21 日
Please start a new Question for this matter. It does not have anything to do with this Euclidean Distance topic.

サインインしてコメントする。

### Community Treasure Hunt

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

Start Hunting!

Translated by