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.
翻译:我们提出了一个技术,通过传播集中光源的光源,以高效、节能的方式减少人发报告书照明环境地图的动态范围。这使我们能够在诸如虚拟生产LED阶段等有限动态范围的照明复制系统中显示人发报告书地图照明光谱的合理近似值。该技术确定了人发报告书地图中超过某一像素阈值的区域,使这些地区扩大,直到每个区域内的平均像素值低于阈值,最后用该地区的平均像素值取代每个膨胀区域的像素。新的人发报告书地图包含与原始相同的能量,尽可能地分散光,并避免染色板发火。