Patent ID: 9641894
Date: 2017-05-02
CPC Classifications: G06F,H04N

Claim:
1. An image transformation apparatus arranged to derive a first image (HDR_PRED) with lumas for a first luminance dynamic range from a second image (LDR_CONT) with lumas for a second luminance dynamic range one of the luminance dynamic ranges being is at least twice as large as the other, wherein the derivation comprises tone mapping of lumas of pixels in the second image to lumas of pixels of the first image by applying at least one predefined mapping algorithm (gam) data, the image transformation apparatus comprising: an input to a data delivery system configured to receive the second image absent the at least one predefined mapping algorithm (gam) data; a secure data input configured to receive, from a server via a network, the at least one predefined mapping algorithm (gam) data from a plurality of different mapping transformation strategies to recuperate a corresponding mapping luminance dynamic range effect information of the first image; and a control unit arranged to manage an access to the received at least one predefined mapping algorithm (gam) data for rendering of the first image under control of the server per a server-side strategy, wherein the server-side strategy is adapted to supply the at least one predefined mapping algorithm (gam) data, from among the plurality of different mapping transformation strategies configured to achieve different dynamic ranges, based on an analysis of rendering-side situation information that includes at least one aspect of one selected from the group consisting of the second image, the image transformation apparatus, a connected display of the image transformation apparatus for rendering the first image, and a user of the image transformation apparatus.