identify object

I have a reference image that contains 10 items. I have separate objects in small images (cut from the reference image). Code sequence must find an object that you selected (if the write code sequence "object 1" must make a circle around the "object 1" If it says "Objective 2" to make the circle around the "item 2" I have this code :

%#read & convert the image 
imgCol = imread('http://i.stack.imgur.com/tbnV9.jpg'); 
imgGray = rgb2gray(img); 
obj = rgb2gray(imread('http://i.stack.imgur.com/GkYii.jpg'));
%# cross-correlate and find the offset 
corr = normxcorr2(...); 
[~,indx] = max(abs(corr(:))); %# Modify for multiple instances (generalize) 
[yPeak, xPeak] = ind2sub(...); 
corrOffset = [yPeak - ..., xPeak - ...];
%# create a mask 
mask = zeros(size(...)); 
mask(...) = 1; 
mask = imdilate(mask,ones(size(...)));
%# plot the above result 
h1 = imshow(imgGray); 
set(h1,'AlphaData',0.4) 
hold on 
h2 = imshow(imgCol); 
set(h2,'AlphaData',mask)

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