The British Aerospace Lecture: Visual processing in texture segregation
A.G. Gale, K. Carr, D. Brogan · 1993
Figure 1.1 Top: the rotated Ts (a difference in line slope) are segregated from the upright Ts, whereas the Ls (a difference in line arrangement) are not. Bottom: the mirror symmetric figures (a difference in overall figural slope) are segregated from the upright figures whereas the inverted figures (no difference in either overall or component slopes) are not.