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[[File:Dolby High Dynamic Range Comparison.png|thumb|Comparison between HDR and SDR. (Image: techhive.com)]]

[[File:Dolby High Dynamic Range Comparison.png|thumb|Comparison between HDR and SDR. (Image: techhive.com)]]

High Dynamic Range (HDR) is an imaging technology that provides a wider range of luminance and radiance of a scene. It captures a wide range of light, presenting a greater level of contrast between light and dark images on the screen. The HDR images generated are much more realistic and closer to what the human eye would normally see. Indeed, the human eyes are HDR and wide color gamut sensitive organs. <ref name=”2”>Denison, C. and Hesse, B. (2017). What is HDR TV (and why should you care)? Retrieved from https://www.digitaltrends.com/home-theater/what-is-hdr-tv/</ref> <ref name=”3”>Crithary, P. (2015). Bill Baggelaar discusses High Dynamic Range. Retrieved from https://issuu.com/sonyprofessional/docs/ca_hdr_excerpt</ref>

High Dynamic Range (HDR) is an imaging technology that provides a wider range of luminance and radiance of a scene. It captures a wide range of light, presenting a greater level of contrast between light and dark images on the screen. The HDR images generated are much more realistic and closer to what the human eye would normally see. Indeed, the human eyes are HDR and wide color gamut sensitive organs. <ref name=”2”>Denison, C. and Hesse, B. (2017). What is HDR TV (and why should you care)? Retrieved from https://www.digitaltrends.com/home-theater/what-is-hdr-tv/</ref><ref name=”3”>Crithary, P. (2015). Bill Baggelaar discusses High Dynamic Range. Retrieved from https://issuu.com/sonyprofessional/docs/ca_hdr_excerpt</ref>

In [[virtual reality]], High Dynamic Range is seen has an important development since it improves the images quality and, consequently, the user’s feeling of [[immersion]]. HDR has also been adopted by the video gaming industry. <ref name=”4”>Petit, J. and Brémond, R. (2010). A high dynamic range rendering pipeline for interactive applications. The Visual Computer, 26: 533-542</ref>

In [[virtual reality]], High Dynamic Range is seen has an important development since it improves the images quality and, consequently, the user’s feeling of [[immersion]]. HDR has also been adopted by the video gaming industry. <ref name=”4”>Petit, J. and Brémond, R. (2010). A high dynamic range rendering pipeline for interactive applications. The Visual Computer, 26: 533-542</ref>

An essential feature of virtual reality is the sense of immersion. There are several factors that contribute to an increase of it, and perceptual realism of the displayed images is one of the most important. <ref name=”4”></ref>

An essential feature of virtual reality is the sense of immersion. There are several factors that contribute to an increase of it, and perceptual realism of the displayed images is one of the most important. <ref name=”4”></ref>

One way to achieve perceptual realism is to get physical realism which is not an easy task since it raises problems in terms of real-time computation and physical modeling. According to Petit and Brémond (2010), “true photorealism implies very accurate 3D models. Next, one must collect the photometric and colorimetric inputs (light source description, spectral representation, material texture, BRDF, etc.) needed for the illumination computation. Then, the full simulation of the scene illumination (either with radiosity or ray tracing methods) in large virtual environments is far from real time. And finally, one cannot avoid the technical limits of current display devices, which are not designed to display physical High Dynamic Range (HDR) luminance values but Low Dynamic Range (LDR) 8-bit images.” However, the virtual reality field has seen major developments since the release of Petit and Brémond’s paper, including research on specific procedures to capture and broadcast High Dynamic Range imagery. <ref name=”4”></ref> <ref name=”5”>Kolchesky, M. (2017). The world’s first virtual reality HDR Pipeline – Vienna 2017. Retrieved from http://ivrpa.org/news/the-worlds-first-vr-hdr-pipeline-vienna-2017/</ref>

One way to achieve perceptual realism is to get physical realism which is not an easy task since it raises problems in terms of real-time computation and physical modeling. According to Petit and Brémond (2010), “true photorealism implies very accurate 3D models. Next, one must collect the photometric and colorimetric inputs (light source description, spectral representation, material texture, BRDF, etc.) needed for the illumination computation. Then, the full simulation of the scene illumination (either with radiosity or ray tracing methods) in large virtual environments is far from real time. And finally, one cannot avoid the technical limits of current display devices, which are not designed to display physical High Dynamic Range (HDR) luminance values but Low Dynamic Range (LDR) 8-bit images.” However, the virtual reality field has seen major developments since the release of Petit and Brémond’s paper, including research on specific procedures to capture and broadcast High Dynamic Range imagery. <ref name=”4”></ref><ref name=”5”>Kolchesky, M. (2017). The world’s first virtual reality HDR Pipeline – Vienna 2017. Retrieved from http://ivrpa.org/news/the-worlds-first-vr-hdr-pipeline-vienna-2017/</ref>

Intel is one of the companies investing in this area, collaborating with DVMobile to create a pipeline for capturing and broadcasting 360-degree HDR videos. The objective is to take virtual reality and immersion to the next stage of development. <ref name=”5”></ref>

Intel is one of the companies investing in this area, collaborating with DVMobile to create a pipeline for capturing and broadcasting 360-degree HDR videos. The objective is to take virtual reality and immersion to the next stage of development. <ref name=”5”></ref>

Game consoles are also adopting High Dynamic Range with the PS4 Pro and Xbox One S. Sony has revealed an update of its [[PlayStation VR]] [[head-mounted display]] that offers HDR passthrough support. <ref name=”2”></ref> <ref name=”6”>Moore-Colyer, R. (2017). Sony has a tweaked PlayStation VR that supports HDR. Retrieved from http://www.trustedreviews.com/news/new-playstation-vr-supports-hdr-3299900</ref>

Game consoles are also adopting High Dynamic Range with the PS4 Pro and Xbox One S. Sony has revealed an update of its [[PlayStation VR]] [[head-mounted display]] that offers HDR passthrough support. <ref name=”2”></ref><ref name=”6”>Moore-Colyer, R. (2017). Sony has a tweaked PlayStation VR that supports HDR. Retrieved from http://www.trustedreviews.com/news/new-playstation-vr-supports-hdr-3299900</ref>

==References==

==References==