Fractal time and 1/f spectra in dynamic images and human vision

Many physical and biological systems have 1/fβ Fourier spectra — a fractal attribute implying multiple similar mechanisms operating at various spatial and temporal scales. These scaling laws of physical phenomena should have correlates in perceptual mechanisms that have evolved to transduce them. We show that measures of a changing visual environment and perceptual measures of how we see it exhibit fractal-like multiscale characteristics; both dynamic images of natural scenes and human temporal frequency perception display commensurate 1/fβ spectral behavior.