The frequency and direction of the 2D DFT of an image are available on the `FFT plot`

, which indicates the frequency as **r** in pixels/cycle, and the direction in degrees as theta (\theta).

On the other hand, the amplitude and phase can be retrieved on the `Complex plot`

, at any point in the (x,y) coordinate system. The complex plot comes stacked-up in its ***Re***al and ***Im***aginary components.

This is explained by Herbie here.

The (apparent… well… my) problem is that both plots (`FFT`

and `Complex`

) appear on the screen separately. So if I want to gather the four values of the 2D DFT for a given point I need to first point-select on the `FFT plot`

, which will print out the corresponding frequency and direction values, together with the Cartesian coordinates of the point ( (167, 119) in the animated GIF below), and then go fishing over the `Complex plot`

for the point in question by hovering over, and keeping a steady hand, until the correct value appears on the display.

I have tried stacking up both plots (`FFT`

and `Complex`

) without success.

The question is: Is there a way to select a point in both the `FFT plot`

and the ` Complex plot`

simultaneously, or somewhat more expeditiously?

Here is an illustration of the problem:

Thank you.