How to use dddtree2/idddtree2 functions ?

Hi, I'm trying to do a code to denoise image using a complex wavelet transform. More exactly, I use the double density dual tree complex wavelet transform. For that, I use dddtree2 function for each color component of the picture. Then I do not know how to restore the transform for all the picture ? After that, I apply a threshold and then I would like to use the inverse transform idddtree2, but I don't know how because my component is a double and I need a struct to apply idddtree2 ? Thanks for your answers.