$$\begin{array}{cc}\hfill & [\text{output},\sim ]=\text{dftregistration}(\text{fft2}(\text{referenceCrop}),\text{fft2}(\text{imageCrop}(:,:,\mathrm{i})),100);\hfill \\ \hfill & \text{shiftX(i)}=\text{output}(4);\%\text{the shift along the x direction}\hfill \\ \hfill & \text{shiftY(i)}=\text{output}(3);\%\text{the shift along the y direction}\hfill \end{array}$$