int im_costra(in, out)
IMAGE *in, *out;
int im_sintra(in, out)
IMAGE *in, *out;
int im_tantra(in, out)
IMAGE *in, *out;
int im_acostra(in, out)
IMAGE *in, *out;
int im_asintra(in, out)
IMAGE *in, *out;
int im_atantra(in, out)
IMAGE *in, *out;
The size and number of bands are unchanged, the output type is float, unless the input is double, in which case the output is double. Non-complex images only!