if an input image is denoted as I(x,y),what does it mean ? what are the values of x and y ?does it means the size of the image of the values of the image?

if for example I(x,y) means does it means all the x rows of the image and y columns?

Answer 1

[Image Analyst]

Depends on the context. It could be an equation in a paper and it's specifying some equation for how you calculate the pixel values. Or it could just mean that the image is a 2D array instead of 3D. Anyway, you need to be careful because a lot of times there are functions in MATLAB and elsewhere that refer to (x,y) but it's a very common mistake that people use (x,y) as indexes for their image array. Usually x is the horizontal index and y is the vertical index, but for arrays, it's reversed - the first index is the vertical (rows) and the second is the horizontal (columns). So if you see an equation like that and want to translate it into MATLAB code, remember to swap them and use imageArray(y, x) or imageArray(rows, columns). If you don't, and the image is not square you'll get an index out of range error.

[ashok]

</matlabcentral/answers/uploaded_files/7714/small%20gabor.JPG> thanq /..could you tell me how to implement this code in matlab

[Image Analyst]

No, the link doesn't work. Generally with code, you copy and paste it into a text editor window in MATLAB and click the green run triangle or type F5 to implement/run it. Did that not work for you?

[ashok]

[ashok]

could you please tell me how to implement the above code in matlab