luminance, as well as second-order signals defined by constant mean luminance and
variation in luminance envelope, or higher-order signals that cannot be estimated by taking
higher moments of the luminance distribution. Separating these properties of a moving
figure to experimentally probe the visual subsystems that encode them is technically
challenging and has resulted in debated mechanisms of visual object detection by flies. Our …
A moving visual figure may contain first-order signals defined by variation in mean
luminance, as well as second-order signals defined by constant mean luminance and
variation in luminance envelope, or higher-order signals that cannot be estimated by taking
higher moments of the luminance distribution. Separating these properties of a moving
figure to experimentally probe the visual subsystems that encode them is technically
challenging and has resulted in debated mechanisms of visual object detection by flies. Our …