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[Preprint]. 2023 Jul 11:2023.07.10.548431. [Version 1] doi: 10.1101/2023.07.10.548431

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Figure 2: — Illustration of compound feature-defined and density-defined boundaries, each of which are formed by combining single-micropattern density boundaries.

(a) Top: A compound density-defined boundary is formed by combining two single-micropattern density boundaries having the same phase of density modulation (0-degree phase difference). Here the single-micropattern density boundaries are comprised of ON- and OFF-center DOG functions. Bottom: A compound feature-defined boundary is formed by combining two single-micropattern density boundaries having opposite density modulation phases (180-degree phase difference).

(b) Demonstration of how compound boundary visibility is parameterized by varying the proportion 𝜋_𝑈 of micro-patterns for each single-micropattern density boundary which are not balanced by a micropattern of the same kind on the opposite side. Here micro-patterns are ON- and OFF-center DOG functions. Top: Feature-defined boundary. Bottom: Density-defined boundary.

(c) Same as (b), but for compound boundaries comprised of vertical (V) and horizontal (H) Gabor micropatterns.