when i run the below code i get an error picture1 does not exist..where should i save the image to get the results

% Compute the integral image and use it to compute the sum of pixels over a rectangular region of an intensity image.

I = imread('Picture1.jpg');

figure; imshow(I);

intImage = integralImage(I);

% Define rectangular region as [startingRow, startingColumn, endingRow, endingColumn].

[sR, sC, eR, eC] = deal(3, 2, 3, 3);

% Compute the sum over the region using the integral image.

J = integralImage(I);

regionSum = J(eR+1,eC+1) - J(eR+1,sC) - J(sR,eC+1) + J(sR,sC);

% Calculate the mean

 mean =  regionSum/4;

Answer 1

[Hanif]

The file must be save in the matlab folder in order for you to call it just like that. If it is saved in My Documents in the My Pictures folder, you must call the directory of the image.

ie.

I = imread('C:\Documents and Settings\user1\My Documents\My Pictures');

[divya]

I = imread('C:\Users\div\Pictures\Picture1.jpg'); figure; imshow(I); intImage = integralImage(I);

I have stored the image on this path and given the exact path..still it is giving this error

File "C:\Users\div\Pictures\Picture1.jpg" does not exist.

[divya]

thnks a lot ..i AM ABLE TO RESOLVE ERROR...BUT AFTER THAT ERROR IS RESOLVED I ENCOUNTERED OTHER ERROR WHEN I RUN...

Error using integralImage Expected I to be two-dimensional.

Error in integralImage (line 41) validateattributes(I, {'numeric','logical'}, {'2d', 'nonsparse', 'real'},...

Error in Untitled2 (line 10) intImage = integralImage(I);

[Hanif]

Not too sure what that error means, that error might be an error from other parts of the code and is not related to Imread(...) or imshow(...). Many times a code will have multiple errors by only the first of many will display, try debugging and steping through to help find error. Sorry again, best of luck

Answer 2

[C.J. Harris]

From the MATLAB help relating to imread:

If the file is not in the current directory or in a directory in the MATLAB path, specify the full pathname of the location on your system.

That is, the image must be in the folder from which you are calling the script, or on your MATLAB path.