# HDR Lighting Dilation for Dynamic Range Reduction on Virtual Production Stages

arXiv: https://arxiv.org/abs/2205.07873 · HTML: https://mlsanity.com/paper/2205.07873/

## Key facts

- Cited by 3 papers in the map (data through 14 Oct 2026).
- First posted on arXiv 12 May 2022.

## Built on by (most cited first, 3 of 3)

- [DifFRelight: Diffusion-Based Facial Performance Relighting](https://mlsanity.com/paper/2410.08188/) (2024)
- [Reviewing Intelligent Cinematography: AI research for camera-based video production](https://mlsanity.com/paper/2405.05039/) (2024)
- [Jointly Optimizing Color Rendition and In-Camera Backgrounds in an RGB Virtual Production Stage](https://mlsanity.com/paper/2205.12403/) (2022)

## Abstract (arXiv)

We present a technique to reduce the dynamic range of an HDRI lighting environment map in an efficient, energy-preserving manner by spreading out the light of concentrated light sources. This allows us to display a reasonable approximation of the illumination of an HDRI map in a lighting reproduction system with limited dynamic range such as virtual production LED Stage. The technique identifies regions of the HDRI map above a given pixel threshold, dilates these regions until the average pixel value within each is below the threshold, and finally replaces each dilated region's pixels with the region's average pixel value. The new HDRI map contains the same energy as the original, spreads the light as little as possible, and avoids chromatic fringing.