Figure 5: Competing Motion Clouds. (A) A narrow-orientation-bandwidth Motion Cloud with explicit noise. A red noise envelope was added to the global envelop of a Motion Cloud with a bandwidth in the orientation domain. (B): Two Motion Clouds with same motion but different preferred orientation were added together, yielding a plaid-like Motion Cloud texture. (C): Two Motion Clouds with opposite velocity directions were added, yielding a texture similar to a counter-phase grating. Note that the crossed shape in the $f_x-f_t$ plane is a signature of the opposite velocity directions, while two gratings with the same spatial frequency and in opposite directions would generate a flickering stimulus with energy concentrated on the $f_t$ plane.}

welcome: please sign in