Pattern detection and the two-dimensional fourier transform: circular targets.
D005403:Fixation, Ocular; D005556:Form Perception; D005583:Fourier Analysis; D006801:Humans; D008297:Male; D008954:Models, Biological; D009949:Orientation; D010364:Pattern Recognition, Visual; D014785:Vision, Ocular; D014792:Visual Acuity; D014793:Visual Cortex / Q000502:physiology