Improved local adaptive logarithmic tone reproduction strategy for high contrast scenes in all-day surveillance applications

摘要

The dynamic range of the luminance of the scenes surrounding us are mostly very wide in all time of a day. High performance cameras were designed to capture these luminance with longer digits in their pixels. However, conventional displays can only render pixels with eight bits per channel, making the devices the bottleneck among the whole pipeline. As an effort to narrow this gap, this paper presents an improved strategy based on existing tone reproduction algorithms. It aims to provide good luminance range compression while preserving fine details of the contents. Experiments demonstrate that the presented algorithm can be successfully applied to the rendition of both natural and synthesized scenes, with high dynamic range or low radiance.