what is the MATLAB code for finding out the canberra distance between query image and images in the database.

actually i have query image and 48 images in the databases.i have implemented the CBIR system but now i have to measure Canberra distance.i have measured the euclidean distance in the following program but now i want to measure canberra distance in place of euclidean distance.The following code gives the implementation of CBIR system.but i want to find the canberra distance..pleaase help me..thanks

clc;

G=imread('spine.tif');

H = adapthisteq(G,'clipLimit',0.01,'Distribution','rayleigh');

[rows cols]=size(H);

[c1,s1]=wavedec2(H,1,'db1');

%disp(c1);

X=c1;

%figure,imshow(G);

%figure,imshow(H);

fileFolder=fullfile(matlabroot,'toolbox','images','imdata');

dirOutput=dir(fullfile(fileFolder,'*.tif'));

fileNames={dirOutput.name}

n=numel(fileNames)

g=zeros(1,n);

for k = 1 : n

fileNames1=strcat('fullfile(fileFolder)',fileNames(k))

I = imread(fileNames{k});

J = adapthisteq(I,'clipLimit',0.01,'Distribution','rayleigh');

J = imresize(J, [rows cols]);

[c2,s2]=wavedec2(J,1,'db1');

%disp(c2);

Y=c2;

%[rows1 cols1]=size(J);

E_distance = sqrt(sum((X-Y).^2));

g(1,k)=E_distance;

if g(1,k)==0

    w=k;

end

%figure,imshow(I);

%figure,imshow(J);

end

disp(g);

II=imread(fileNames{w});

figure, imshow(II);

[sorted,IX] = sort(g);

firstFiveImages = IX(1:5);

for I = 1:length(firstFiveImages)

 figure;imshow(imread(fileNames{firstFiveImages(I)}));

end

[Rima]

please help me

[Rima]

i want the formula used in MATLAB for Canberra distance

[Rima]

yes i want someone to write an implementation of the Canberra distance in MATLAB..I will be very much thankful to you

[Rima]

i only want the formula.As in case of Euclidean distance,E_distance = sqrt(sum((X-Y).^2)) is used in MATLAB. Similarly what is the formula for Canberra distance in MATLAB.please help me.thanks

[Shrikant]

sum(abs(X - Y)./(abs(X) + abs(Y)))