Posts tagged "Lens Corrections"

October 2, 2013

Sync Upright’s Numeric Transforms in Camera Raw

Often I have found that I want to apply perspective correction to multiple files at once using the Upright feature in Camera Raw. But depending on the results I want to achieve, it’s best to know that there are two different ways of accomplishing this. Note: For both methods, it is recommended that you first enable Lens Profile Corrections and  Remove Chromatic Aberration using the Lens Corrections panel in Camera Raw.

METHOD ONE  – in the first situation, you might have a series of unrelated images that all need to have their own set of perspective corrections made to them. In this case, the easiest way to apply Upright would be to:

• Select all of the desired files in Camera Raw. Then in the Lens Correction panel, in the Manual sub-panel (where the Upright controls are) click the desired Upright mode (Auto, Level, Vertical, or Full) in order to apply the perspective correction to all selected files.

Here all of the images are selected, then the Upright mode is applied.

Here all of the images are selected in the filmstrip, then the Upright mode is applied.

• With this method, each image is analyzed individually and the perspective corrected.

Note: if you prefer not to select all of the files first (or have additional settings in other panels that you want to synchronize to multiple selected images), you can select the first file and apply the desired changes including the Upright mode. Then, add the other images to your selection and click the Synchronize button. In the Synchronize dialog, check the settings you want, plus Transform. And, if you do this often, you may want to consider creating a preset to apply an Upright transformation mode.

METHOD TWO – in the second situation, you might have a series of related images – such as a sequence of bracketed exposures or a set of time lapse images for which you need the same exact numeric perspective corrections made to each image. In this scenario, you don’t want to run the upright analysis on each individual image because Upright is likely to return a slightly different result on each of the images in the selection. Instead, what you want to do is have the upright analysis be performed on one of the images, and then have the result of that analysis (the numeric transformation) synchronized across the other images in the set.

In order to do this,  select the first image of the series (in this case one of several exposures necessary to create a single HDR image) and apply the desired Upright transformation option.

Apply the Upright transformation to the single selected image.

Apply the Upright transformation to the single selected image.

Then, add the additional images to your selection and, in the Lens Correction panel, in the Manual sub-panel, click the Sync Results hyperlink.

All images in the Filmstrip are selected and the becomes available.

With all of the images in the series selected in the filmstrip, the Sync Results hyperlink becomes available..

With multiple images selected, Camera Raw will copy Upright’s numerical transformations from the primary image to the other selected images.

5:02 AM Permalink
May 2, 2013

Additional Lens Correction Features in Lightroom

Here are three more interesting Upright options/features:

1) When you apply an Upright mode to a file to correct perspective, Lightroom caches that information (there are a number of reasons for this including but not limited to speed, consistency, future versioning, etc.). This means that if you apply an Upright mode and then decide to check “Enable Profile Correction” (simply because you forgot to do this first), you will want to click the “Reanalyze” option. This will tell upright to forget about those stored corrections, redo its analysis of the image, and compute a new correction.

2) Upright will generally work better on raw files compared to non-raw files, because it can take advantage of more reliable metadata (e.g., focal length).

3) Rotated crops and manual perspective corrections on existing images will usually interfere with automated Upright corrections. For this reason, applying any of the Upright corrections will reset the crop and manual perspective adjustments (Horizontal, Vertical, Rotate, Scale, and Aspect controls). Resetting the crop has the benefit of showing the user the maximum amount of image area remaining after an Upright adjustment (of course the crop can then be re-adjusted). Resetting the manual options will yield a better correction. However, in case you have a workflow that requires maintaining manual perspective corrections, Option + (Mac) | Alt  + (Win) when choosing an Upright mode will preserve those manual settings.

5:24 AM Permalink