why i am getting Undefined variable error?

I have a graduation project on matlab related with a bio engineering and computer engineering project. The bio engineers when make some experiments they get some images related with bacteria and they wants to me I'm writing a program in matlab and when they are loading the image from this program they are getting automatically bacteria on the image. So my project advisor said me I was need to use circle detection method, gaussian image filtering, and sharpening filtering and get the blue colored cicrcles on the image and I'm writing one demo program but it gives an error now I share you a program codes please tell me what i make a mistake or mistakes.

This is my program its name is Demo.m:

I = imread(C_Users_GOZDE_Demo.m,'images ov cells.jpg');
I = rgb2gray(I);
b = imsharpen(I);
figure, imshow(b)
title('Sharpened Image');
[centersBlue, radiiBlue] = imfindcircles(I,[20 25],'Object Polarity','blue');
h = fspecial('gaussian');
%/h = fspecial('sobel');
I2 = imfilter(I, h);
imshow(I), title('Original images ov cells');
figure, imshow(I2), title('Filtered iimages ov cells');

[Jan]

It would be useful, if you post the complete error message. Then the readers do not have to guess which variable is missing.

This line is strange:

I = imread(C_Users_GOZDE_Demo.m, 'images ov cells.jpg');

Maybe you mean:

I = imread('C:\Users\GOZDE\Demo\images ov cells.jpg');

???

[CEM GÖKDEL]

When I was trying that command matlab is give me that error: Error in imread (line 340) fullname = get_full_filename(filename);

[Walter Roberson]

I am going to guess

I = imread('C:\Users\GOZDE\Demo\images\ov\cells.jpg');

[CEM GÖKDEL]

Again I was getting the same error:

Error in imread (line 340) fullname = get_full_filename(filename);

[Walter Roberson]

What is the exact location of your image file?

[CEM GÖKDEL]

My image file location in C: part you mean I should get my image file and put the same location on the my program location?

[Walter Roberson]

Do you have a C: drive?

Do you have a folder named Users at the top level of the C drive?

Do you have a folder named GOZDE inside C:\Users?

Do you have a folder named Demo inside C:\Users\GOZDE ?

Do you have a folder named images inside C:\Users\GOZDE\Demo ?

Do you have a folder named ov inside C:\Users\GOZDE\Demo\images ?

Do you have an image file named cells.jpg inside C:\Users\GOZDE\Demo\images\ov ?

You need to tell us the complete path of the image you are trying to read. And then you need to change the line of code to read from that complete path.

Do not put data into the folder that MATLAB is installed into.

[CEM GÖKDEL]

Yes I have just C drive my microsoft 7 laptop has just one partition, and also I have a Users in my C drive, and I have a folder named GOZDE inside C:\Users, And I have just DEMO program file inside C:\Users\GOZDE I don't create any folder just create a program file or script file on C:\Users\GOZDE, and I don't have any image folder on C:\Users\GOZDE\Demo.m program file location, I have just experimental image file and it's name is images ov cells.jpg and it is directly inside on C:\. I mean when you enter directly C:\ partition drive you are directly see my experimental image. But my program file path is inside from the C:\Users\GOZDE\Demo.m and I don't create any folder for this program or image. So please tell me what is your advice from me?

[CEM GÖKDEL]

Yes my friends I solved my problem thank you for your helps. I just create a new folder under the GOZDE and I send my program file and image file in this folder and when I was making this path in my program path on matlab I solved my problem and the program is run. So thank you again and also I know I was late but happy new years for all:))

Answer 1

[KALYAN ACHARJYA]

I have run it, now there is no error, Please Note there is no space between Object & Polarity, No comma in [centreBlue rediiblue], In the same line I have to change it from blue to 'dark'. Previously It showed no 'blue defined' in Matlab context, that's why I have to changed it.

        I=imread('image.jpg'); % Change Image Name as per your image
        I=rgb2gray(I); 
        b=imsharpen(I); 
        figure, imshow(b); title('Sharpened Image'); 
        [centersBlue radiiBlue]=imfindcircles(I,[20 25],'ObjectPolarity','dark'); 
        h=fspecial('gaussian'); 
        %/h = fspecial('sobel'); 
        I2 = imfilter(I, h); 
        imshow(I), 
        title('Original images ov cells'); 
        figure, imshow(I2), title('Filtered images ov cells');

[CEM GÖKDEL]

I am trying your code I just make change my image name. Because you also said me change the image name, but again the matlab is give me an undefined variable or class error

[Jan]

@CEM GÖKDEL: A copy of the complete error message would be more useful than the rough rephrasing "matlab is give me an undefined variable or class error".