how to apply any function or manipulate at partcular region of an image

sir i want to manipulate the part of an color image. how to apply any function or manipulate at partcular region of an image

Answer 1

[Walter Roberson]

See http://www.mathworks.com/help/images/ref/blockproc.html blockproc() from the Image Processing Toolkit

[ARUN SAI]

sir i have applied noise to a color image at a particular region,now i want to remove the noise by applying only at that region. explain with example.

[Image Analyst]

Is KAS your other account? Because the initials match, and the questions in the two seem very similar. I just answered this question there: http://www.mathworks.com/matlabcentral/answers/81327-how-to-remove-the-noise-applied-to-particular-part-of-color-image