Device and method for dynamic range expansion in a virtual reality scene

Abstract

A lower dynamic range visual content (21) of a virtual reality or VR scene represented in a curved shape form is adapted to a higher dynamic range display of the virtual reality scene. At least two planar key views (230) of the VR scene area obtained, at least two parameter values (240) respectively associated with those planar key views are obtained, corresponding to at least one parameter adapted to expand a dynamic range of a visual content, and a higher dynamic range visual content (22) corresponding to the lower dynamic range visual content in at least part of the VR scene extending beyond the planar key views is determined, based on the parameter values. The invention further provides applications to Inverse Tone Mapping.

Description

technical field [0001] The present disclosure relates to the field of Virtual Reality (VR), and more particularly to dynamic range extension applied to curved shape representations. [0002] Specifically, it relates to Inverse Tone Mapping (ITM). Background technique [0003] Currently, two key technologies in the media and entertainment space are High Dynamic Range (HDR) imaging and virtual reality (VR). HDR refers to content and displays that encode a wider range of brightness and contrast than traditional solutions, and are therefore better able to represent lighting in real-world scenes. VR, on the other hand, refers to technologies that simulate a real, full field of view, allowing viewers to experience a scene as if they were inside it. Compared with viewing images on traditional monitors, VR brings a greater sense of immersion and realism. [0004] More precisely, in VR, content often takes the form of 360° scenes in which the viewer can look around (and even move)...

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