I am very new to matlab and image processing toolbox.
I have a source image in matlab. I need to blur this image by taking the Fourier transform of it and then multiply it with H(u,v). At least I need take the inverse transform. H(u,v) is given below. How can I do it with matlab. PI is the PI constant in math.

Look
imfilterfunction from Image Processing Toolbox. If this function is not appropriate for you then you can usefft2andifft2functions to do forward and backward Fourier transform.