We are looking for a program or script to determine spatial frequency in natural images. Any suggestions will be very welcome. Many thanks, Velia. Velia Cardin Wellcome Laboratory of Neurobiology University College London Gower Street WC1E 6BT tel: +44 (0) 207 679 2187 e-mail: v.cardin at ucl.ac.uk http://www.vislab.ucl.ac.uk/