A dual modulation algorithm for accurate reproduction of high dynamic range video

Emin Zerman (1) , Giuseppe Valenzise (1) , Frédéric Dufaux (1)

1 LTCI - Laboratoire Traitement et Communication de l'Information

In this paper, we consider the problem of accurately reproducing high dynamic range (HDR) images and video on HDR displays. Differently from conventional image reproduction devices, HDR displays require dual modulated signals to drive the back LED panel and the front LCD screen. In this work, we present an iterative scaling approach to estimate these two signals, which is able to reproduce accurately luminance values stored in HDR files. To avoid temporal artifacts due to frame-by-frame processing, we also describe a temporal smoothing mechanism to compute backlight illumination. Our results demonstrate higher accuracy than simpler approaches such as built-in display rendering. Furthermore, the proposed method offers the possibility to estimate precisely the lumi-nance emitted by the display.

Mots clés: High dynamic range; rendering; dual modulation; luminance estimation; temporal variation

Domaines: Traitement du signal et de l'image [eess.SP]; Traitement du signal et de l'image [eess.SP]

Emin Zerman, Giuseppe Valenzise, Frédéric Dufaux. A dual modulation algorithm for accurate reproduction of high dynamic range video. 12th IEEE Image, Video, and Multidimensional Signal Processing Workshop (IVMSP 2016), Jul 2016, Bordeaux, France. ⟨10.1109/IVMSPW.2016.7528226⟩. ⟨hal-01362368⟩