Please note that deselecting of “use full range” might result in ignoring some existing signal levels, even if your delivery is in the video range. The checkbox “ Use Full Range” decides if the plug-in calculation is using or ignoring signal levels above legal white and below legal black. For most HDR productions, ST.2084 should be the best option. The BT.2100 option follows the flavor of several post-production tools to dedicate the full range of available values to only a part of the possible dynamic range of PQ. You’d do that if you don’t want the diagram to include areas of low noise or clipping.
One of the reasons why this EOTF option is relevant for the Chromaticity Diagram is that you’re able to ignore specific ranges of Luminance or Lightness (L*u’v’) in the diagram. The EOTF selection allows you to pick in between HDR (PQ/ST.2084), HDR (PQ/BT.2100), SDR with adjustable gamma and peak luminance or HLG. For most of the current HDR productions, you’ll need to select BT.2020 and then see if the P3 gamut within this container is exceeded or not. The selection for the containercontains the options BT.2020, BT.709, sRGB, Adobe RGB, DCI-P3 (D65) and DCI-P3(D60). In order to calculate all color coordinates correctly, you need to define some parameters of your footage here. The size and position of the analysis window can be defined. If you want to apply the chromaticity analysis to a specific section of the frame instead of analyzing the whole frame, you’re able to do so here. Several presets are delivered with the installation of the plug-in. In this section, you’re able to save and open presets for the appearance and calculation basis of this plug-in. The plug-in will show you the xy or u’v’ coordinates of the pixels in your video! Working with the BT.2020 container in particular, it’s important to manage necessary limitations and see if you’re using legal colors or not. The diagram will help you to see how much of the color gamut you’re using and if you’re exceeding the legal colors of the specified gamut. It covers BT.2020, DCI-P3, BT.709 and Adobe RGB. With this plugin, you’re adding a the ability to monitor using a CIE diagram to your productions. HDR Chromaticity Diagram Plugin for Davinci Resolve, Adobe Premiere and Adobe After Effects
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