![]() ![]() A wide-field deep-sky image at ISO 1600 with an 85mm lens, with very tiny stars.A nightscape with star trails and a detailed foreground, at ISO 1600.For the nightscape and wide-field images taken with lenses in DxO’s extensive database, I used PureRAW’s lens corrections, not Adobe’s.Īs shown above, I chose three representative images: CR3 files onto the app, then exporting the results as raw DNG files, but with the same settings applied as with the other raw files. I tested PureRAW 2 by dropping raw Canon. It can work only on raw files as a stand-alone app, or as a plug-in from Adobe Lightroom. However, the exception is DxO’s PureRAW 2. So my workflow and test procedures reflect that. Many astrophotographers also choose to stack unedited original images with specialized stacking software, then apply further noise reduction and editing later in the workflow. But for my personal workflow I prefer to develop the raw files with Adobe Camera Raw, then open those into Photoshop for stacking and layering, applying any further noise reduction or sharpening as non-destructive smart filters. Most of these programs state that better results might be obtainable by using the stand-alone app on original raw files. ![]() MethodologyĪs described below, while some of the programs can be used as stand-alone applications, I tested them all as plug-ins for Photoshop, applying each as a smart filter applied to a developed raw file brought into Photoshop as a Camera Raw smart object. The three test images in Adobe Camera Raw showing the Basic settings applied. For reasons explained below, I would not recommend DxO’s PureRAW 2.Other new programs, notably Topaz Photo AI and Luminar’s Noiseless AI, also need improvement before they are ready to be used for the rigors of astrophotography.While ON1’s new NoNoise AI 2023 performed fine, it proved slightly worse in some cases than its earlier 2022 version.For nightscapes and other images, Topaz DeNoise AI performed well, better than it did in earlier versions that left lots of patchy artifacts, something AI programs can be prone to.Of the group tested, the winner for use on just star-filled images is a specialized program for astrophotography, NoiseXTerminator from RC-Astro. ![]()
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