High pass filter a signal in the frequency domain

I have converted an image into frequency domain using fft2() function. Now I want to extract only the high frequency components. How to solve this?

[John Navarro]

Use the app for filter design.

But first define what is high frequency for your case? For example in my project all signal over 10Hz is defined as High-frequency, in other applications it refeers to components over 10KHz.