ShiftImage

Shifts an image using the Fourier shift theorem.

Description

IMG_SHIFTED = SHIFTIMAGE(IMG, FRAC_DELTAX, FRAC_DELTAY);

Shifts the image IMG using the Fourier shift theorem by the Field-of-view (FOV) fractions FRAC_DELTAX and FRAC_DELTAY.

The fraction is relative to the size of the image such that a value of 1.0 shifts the image back to where it started. Shift fractions outside this range will wrap around to the corresponding shift within the range.

The shift is performed using Fourier sinc interpolation, i.e. the Fourier shift theorem, via simple phase adjustments in the frequency domain. This may lead to Gibbs phenomena.

• MATLAB release: MATLAB 5.2 (R10)

[M C]

This is whack

[B. epo]

very great! working well.
just if the shift is '0', the shift should not be performed (to save computing time)...

[Aalok Jariwala]

good, as a student i am learning and it is too early for me to comment strongly on it.

[Jonathan Comeau]

Works great for my application! However, I think line 61 should be oydim+1 instead of oxdim+1. As it stands now this small mistake leads to a matlab error when the input image x-dimension is even and the y-dimension is odd.