how to find pixel value of an image

imread('a.jpg');
[r c]=size(A);pixel

[Adam]

Your question is not clear, mostly because you just wrote 2 lines of code without any question apart from the very vague title.

Answer 1

[aaru sri]

how to make a one pixel change in it

Answer 2

[KSSV]

% Gray Image
I = imread('your image') ; 
level = I(r, c);

% RGB image 

I = imread('your image') ;
rgb = impixel(I,r,c) ;

[vasantha malairamar]

Undefined function or variable 'c'.

Error in secure>pushbutton2_Callback (line 306) rg = impixel(I,r,c) ;

[KSSV]

r,c should be indices which stand off row and column positions.

Answer 3

[Sushil Sharma]

Dear vasantha malairamar

I just update your answer, if you need to know the rows and columns in your image:

Let's say you have an image which is

I = imread('abc.png')  % your image
rgb = impixel(I,rows, columns)  %impixel function 

rgb = 107   107   107  % you will get the pixel value

Answer 4

[Aaron Charles Alday]

Hi! May I ask how to determine the pixel value of a grayscale picture?