V. Dolzhenko, V. Chesnokov, and E.A. Edirisinghe (UK)
High dynamic range imaging; tone mapping; imagecompression; backwards compatibility.
This paper presents a two layer CODEC architecture for lossy high dynamic range image compression. The first layer contains the tone mapped image obtained using a conventional low dynamic range encoding approach, such as JPEG. The second layer contains the image difference, in perceptually uniform color space, between the result of inverse tone mapped low dynamic range content and the original image. We present techniques for efficient implementation and encoding of non-uniform tone mapping operators. We show that better de-correlation of the information in the layers can improve the coding efficiency.
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