Make output image appear inside Maniplulate?

Hello Dear Members,
Iam trying to make the output image appear in the pane. That is when I click the “Gradient filter” button, the resulting image should replace the binarized image. The output should not be on the next line.
I’ve tried to use “Switch”, “Gird”. I did not obtain it

Please help.

Manipulate[
var2 =(IMAGE HERE);
var1 = Binarize[var2, bin];

 Column[{Button["gradient Filter", 
    out = ImageAdjust[GradientFilter[var1, 0.5]]], 
   Row[{var2, var1, out}]}],
 
 {bin, 0, 1}]

Hello,
Thanks very much.
I tried it.
Its a side by side comparison.
Actually I require the gradient filtered image to REPLACE the original image on the Gui
I tried the “show”. this works only for graphics.
Thanks for suggestions