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fftrot

$ \bigcirc$Name


fftrot Rotate then translate an image using Fourier interpolation




$ \bigcirc$Command Synopsis


fftrot [-a a] [-x x] [-y y] [-o] in out



-a a : rotation angle (in degrees, counterclockwise, default 0.0)

-x x : translation vector (x coordinate, default 0.0)

-y y : translation vector (y coordinate, default 0.0)

-o : to take (0,0) as the rotation center (instead of the image center)

in : input Fimage

out : output Fimage




$ \bigcirc$Function Summary


void fftrot (in , out , a , x , y , o_flag )

float *a , *x , *y ;

char *o_flag ;

Fimage in , out ;




$ \bigcirc$Description


This modules uses Yaroslavsky's algorithm to perform a quasi-exact rotation of an image in the sense of Fourier interpolation. It can also be used to apply an exact translation.




$ \bigcirc$See Also


fft1d.




$ \bigcirc$Version 1.01


Last Modification date : Thu Nov 29 20:23:56 2001


$ \bigcirc$Author


Pascal Monasse






next up previous contents index
Next: fftzoom Up: Reference Previous: fftgrad   Contents   Index
mw 2004-05-05