Radial lenticular blending effect

Summary

A continuation of the rotation-effect lenticular family. The parent (9,171,392) introduced a print that, as the viewer tilts it, zooms inward on a group photograph while a separate individual portrait fades in radially from the center — a polished team-portrait effect that works from the two images a photographer naturally captures.

This continuation focuses on the blending mechanism itself. Instead of a simple cut or cross-fade between the two source images, the print uses an interlaced alpha-channel mask that controls visibility pixel by pixel under the lens array. The alpha mask is patterned to share the same radial center as the zoom, so the two effects reinforce each other rather than competing.

The added claims cover the structure of the lineated printed image — three distinct regions for the first image, the blended transition, and the second image — and the ability to tune the alpha gradient from a smooth, vignette-like transition to a much sharper boundary. That tunability lets a designer dial in whether the second image emerges subtly or arrives as a confident reveal, opening the same base technology to wedding, sports, school, and event-photography workflows with different aesthetic expectations.