HDR Guide – From Atomos
If you get a little fuddled by the terms of HDR, Atomos have provided a great tech guide – check the link above
Atomos HDR Tech-Guide As a technology manufacturer, it is not very often that you witness a single leap forward in technology that changes the way every professional works. Last year, like many others we witnessed the massive leap forward known as HDR (High Dynamic Range). HDR is truly one of those “you have to see it to believe it” technologies, pushing the boundaries of conventional capture and display capability and bridging the gap between what we see on TV monitors and reality as we see it with our eyes. Rather than increasing the number of pixels we see, HDR revamps the brightness range we can see in a single scene – displaying brighter and darker parts in a scene at the same time. In consumer terms it means a sunset will look more vivid and life-like while in filmmaking terms it means you no longer clip highlights or sacrifice shadow detail. What’s even better is that this giant leap forward in technology doesn’t come with an equivalent quantum leap in equipment or infrastructure upgrades.
The cameras you are using most probably already have the log HDR output required, unlike 4K the file size does not increase, content developers such as Netflix and the BBC are pushing for HDR content for distributors like www.aaasatellite.tv and end users are already buying HDR flat screens for the home throughout 2016. The missing piece of the HDR puzzle lies in the field monitoring and post production editing workflows. Of course, as Atomos have done with HD and 4K, we’ve worked hard to deliver a solution to make the whole HDR process faster, easier and more affordable. In this tech guide, we’ll help you with both a technical and real world understanding of what HDR and SDR (Standard Dynamic Range) is, clarify the common terms used to describe HDR and using the Atomos SDR to HDR slider that is on our user interface show you the trade offs between SDR to HDR so you can make the right shooting decision for different scenes. Quick glossary. Before we get into the details of HDR, we should first clarify some explanations of key terms. See attached appendix for a full explanation of the glossary terms below, they will assist you with understanding HDR; HDR terms; Dynamic Range, Contrast, Brightness, Nits, Stops Camera sensor basics; how a sensor converts light to digital Monitor basics; calculating contrast ratio and the relationship to dynamic range Recording basics; why Log curves are used Brightness standards; Rec709 brightness standard and new standard for HDR (ST2084 or PQ) Color standards; Rec709 color standard and the extended color space (gamut) for HDR (DCI-P3, BT2020)
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