6
Expansion Operators for Low Dynamic Range Content
The quick rise in popularity of HDR has meant that the large amount of legacy content is not particularly suited for the new HDR technologies. This chapter presents a number of methods that generate HDR content from LDR. The expansion of LDR content is achieved by transforming LDR content into HDR content using operators commonly termed expansion operator (EO); see Figure 6.1. This expansion allows the large amounts of legacy LDR content to be enhanced for viewing on HDR displays and to be used in HDR applications such as image-based lighting. An analogy to expansion is the colorization of legacy black and white content for color displays [222,231,415].
Figure 6.1. The general concept ...
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