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Abstract
Tone reproduction algorithms attempt to compress a large range of pixel values into a smaller range that is suitable for display on devices with limited dynamic range. A recently proposed tone reproduction operator achieved this goal by emulating photographic practice. Like in photography, the manual tuning of a small set of intuitive parameters was required. In this paper we extend this photographic tone reproduction algorithm with an automatic method for estimating these parameters. The estimation process is also based on photographic practice. The resulting operator produces good images and does not require manual parameter tuning. Sample source code is available online.