Luminance correction of 3D projection pictures for qualitative evaluation of daylit spaces

Cauwerts, Coralie [UCL] Bodart, Magali [UCL]

This paper presents the corrections applied to high dynamic range (HDR) pictures before their projection, in the frame of a study which compares perceptions in the real space with those resulting from 2D and 3D projections. HDR pictures captured in rooms presenting different luminance patterns had been processed in order that luminances projected onto the screen were as close as possible to real world luminances. As the 3D display device could not reproduce real world luminances, HDR pictures were firstly tone mapped. A filter was then determined to correct variation of luminances on the screen. It reduced luminances in the center of the screen, increased luminances near the border and set maximal displayable luminance to 300cd/m². Finally, luminances of the picture were overall increased by about 15% to counter the wearing of passive glasses, required to see the 3D effect.