.... Particle image velocimetry measurements demonstrated that the seal could have used the highest velocities and the steepness of the gradients within the wake to discriminate object size, beside the size of counter-rotating vortices and the spatial extension of a wake. For shape discrimination the subject...

... of Biologists Limited 2005 2005 honeybee shape discrimination convex shape colour contrast luminance contrast motion contrast generalization Discrimination among convex shapes is one of many aspects of spatial vision that has been investigated in the bee. A convex shape (also termed `closed...

... between the two species. However, in neither species is the discrimination performance correlated with the amount of overlap of the black areas contained in the various pairs of shapes, suggesting that, in our experiments, shape discrimination is not based on a template-matching process. We propose...