![]() When correcting the perspective for a building, where you are correcting for a keystone effect, it is generally a good idea to go to the Manual tab afterward and adjust the Vertical slide, adding something like a +10 adjustment so the corrected verticals converge slightly. What tends to happen, though, is the perspective can often end up looking too perfect. The Upright adjustments aim to correct the perspective in such a way that having the choice of four different methods should mean at least one of these will work best. When exporting as JPEG, the transparent areas are now represented as white (instead of gray). When exporting images as TIFF or PSD to Photoshop the transparency will be preserved and appear represented with the usual checkerboard pattern. In Lightroom you will notice how transparent areas (that may appear when applying an Upright correction or Manual transform) are represented in Lightroom as matte white instead of gray. Lightroom 5 now supports and preserves image transparency when reading TIFF, PNG, and DNG files. Also, when Upright is unable to do anything, informative text to that effect appears at the bottom of the panel. The only time a manual transform won’t be reset is if an Upright correction can’t be found. Therefore, these settings need to be auto-removed when selecting an Upright setting. It is important to realize that where an image has already been cropped or manually transformed, an Upright correction won’t work properly. As you click on any of the above options (except Off), this automatically resets the Horizontal, Vertical, Rotate, Scale, and Aspect Transform sliders, as well as resetting any crop that’s active. It allows you to enable or disable a Lens Profile correction, which would otherwise affect how an Upright precalculation is made (note that Alt-clicking the Reanalyze button also resets). If you click the Reanalyze button, it switches off the adjustment and clears the memory so to speak, and when available, forces Upright to calculate a new transformation. The Off setting can be used to turn off an Upright correction, while preserving the initial, precomputed analysis of the image. ![]() Each button has a mouse rollover tool tip that explains its function. And lastly, the Full correction applies a full level and a converging vertical and horizontal perspective adjustment, and does allow strong perspective corrections to occur.įigure 4.72 The Lens Corrections Basic tab, with the Auto Upright option applied to an image. ![]() The Level + Vertical perspective correction applies a level and a converging vertical lines adjustment. The Level correction applies a leveling adjustment only-this is like an auto-straighten tool. However, if the auto adjustment ends up being quite strong, some outside areas may remain visible when applying an Auto setting. When selecting an Auto setting it mostly crops the image to hide the outside areas. The ultimate goal is to apply a suitable transform adjustment that avoids applying too strong a perspective correction. Essentially, it aims to level the image and, at the same time, fix converging vertical and horizontal lines in an image. The Auto correction applies a balanced correction to the image, which rather than auto-selecting an Upright setting, applies a balanced combination of the options listed below. These were arrived at after testing a large number of images, so it is always worth checking out each option to see which adjustment works best for an individual photo. Several Upright options are offered here, because no single type of adjustment will work perfectly for every image. How this works is Lightroom first analyzes the image for straight-line edges and from this is able to estimate a perspective transform adjustment. The Lens Corrections panel ( Figure 4.72) now allows you to select various Upright (automated perspective) corrections.
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