High Dynamic Range Imaging
نویسندگان
چکیده
High dynamic range (HDR) images and video contain pixels, which can represent much greater range of colors and brightness levels than that offered by existing, standard dynamic range images. Such “better pixels” greatly improve the overall quality of visual content, making it appear much more realistic and appealing to the audience. HDR is one of the key technologies of the future imaging pipeline, which will change the way the digital visual content is represented and manipulated. This article offers a broad review of the HDR methods and technologies with the introduction on fundamental concepts behind the perception of HDR imagery. It serves both as an introduction to the subject and review of the current stateof-the-art in HDR imaging. It covers the topics related capture of HDR content with cameras and its generation with computer graphics methods; encoding and compression of HDR images and video; tone-mapping for displaying HDR content on standard dynamic range displays; inverse tone-mapping for up-scaling legacy content for presentation on HDR displays; the display technologies offering HDR range; and finally image and video quality metrics suitable for HDR content.
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