A full breakdown of all changes can be viewed here. There are many more minor changes, including WebP read support, regional date/time format support in thumbnail tooltips, JFIF support, and bug squashing. Other big changes include a rewritten slideshow tool that offers a better user experience, a new drop-down menu to provide more convenient access to filters, better readability for the UI of the range rating filter, and the ability to read and write JPEG XL images. The lens correction module within darktable can extract the lens correction information from metadata. You can see the effects of these corrections when opening affected images in numerous photo editors, now including darktable 4.2.0. Some cameras record lens correction information and bake it into the image's EXIF metadata. This has numerous consequences, including allowing users to use a second darkroom image window with focus peaking and ISO-12646 color assessment modes, an improved snapshot module with a dynamically generated view (which can be zoomed and panned using the keyboard or mouse), identical previews across multiple windows, and the ability to preview the effect of a user-generated style on an image before applying the effect. When working with multiple windows, users can now take advantage of the pixelpipe used for image display in the darkroom view. Accordingly, it has replaced 'clip highlights as the new default algorithm within the app. The new algorithms within the highlight reconstruction module are 'inpaint opposed' and 'segmentation based.' The former algorithm 'has proved very stable and provides good results in many images,' writes the darktable team. You can use the module to expand or condense the dynamic range of a scene to correspond to the dynamic range of a display. As outlined in the in-depth darktable 4.2.0 user manual, you use the Sigmoid display transform module to remap the tonal range of image using a generalized log-logistic curve. Starting with the Sigmoid display transform module, this can be used in place of the existing filmic and base curve modules. Among the key additions are a Sigmoid display transform module, a pair of new algorithms within the highlight reconstruction module, a reworked pixelpipe for image display in the darkroom view, improved user interface, lens correction information being accessible from EXIF metadata, improved slideshow and more.
Darktable 4.2.0 is now available, adding new features to the open-source Raw image editing application.
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