Methods for conversion of high dynamic range content to standard dynamic range content and vice-versa

High dynamic range (HDR) content may be converted to a significantly lower dynamic range so that it may be displayed on a standard dynamic range (SDR) display device. As the dynamic range mismatch between content and display capabilities can be significant, the manner in which the dynamic range is reduced impacts the visual quality that can be achieved. Likewise, SDR content, such as for instance legacy content, may be converted to HDR content to enable display on a HDR display device, or to bring such content into a HDR video workflow.

This Report provides guidance toward the design of methods that achieve such conversions, which are referred to as tone mapping and inverse tone mapping, and it presents example methods along with their evaluation.