This plugin allows you to quickly see the results of exporting an image at each of the JPEG quality settings that Lightroom supports.
This plugin works in Lightroom 5, Lightroom 4, Lightroom 3, and Lightroom 2 (though some features may be missing in older versions of Lightroom).
The same download works for both Windows and Mac. See the box to the upper right for the download link (in orange) and installation instructions.
Exporting an image as a JPEG involves a compromise between file size and image quality. With many images, image quality does not increase appreciably with the last few steps in quality, but those last few steps incur a sharp increase in file size. Depending on your needs, you may want to forego the final miniscule smidgen in quality to save a doubling of the file size.
Or, perhaps, not.
In either case, being able to see, explicitly, the specific results with a specific image makes your decision more informed.
This plugin is a companion to my detailed writeup:
Please see that writeup for an overview of the meaning of JPEG quality settings within Lightroom.
Here's what this plugin does:
- Exports a copy of the image at each of the 13 JPEG quality settings that Lightroom supports.
- Exports a lossless TIFF of the image.
- Optionally, imports those copies back into Lightroom, making it easy to immediately inspect the results.
- Optionally, show in Finder/Explorer the folder where the exported copies were placed, making it easier to immediately inspect the results with an external viewer.
- Optionally, display a dialog reporting the sizes of each of the JPEG copies (seen in the opening image above).
Selecting a photo and invoking “File > Plugin Extras > Launch Export Quality Tests” brings up a dialog:
The various copies created by the plugin have filenames indicating their quality. For example, applying this plugin to my master image “JF7_031729.NEF” produces the 14 new image copies:
JF7_031729--lossless.tif JF7_031729--qual=000-007.jpg JF7_031729--qual=008-015.jpg JF7_031729--qual=016-023.jpg JF7_031729--qual=024-030.jpg JF7_031729--qual=031-038.jpg JF7_031729--qual=039-046.jpg JF7_031729--qual=047-053.jpg JF7_031729--qual=054-061.jpg JF7_031729--qual=062-069.jpg JF7_031729--qual=070-076.jpg JF7_031729--qual=077-084.jpg JF7_031729--qual=085-092.jpg JF7_031729--qual=093-100.jpg
The “filename-base suffix” option lets you ensure unique filenames in case you run the plugin on the same image more than once. For example, you might leave it blank for full-sized copies, but enter “small” when testing the quality on reduced-size copies of the same image, or perhaps “crop” for testing a crop of the image. Running these three examples would produce 42 new images (14 for each of the three), among them these “quality 39 through 46” copies:
JF7_031729--qual=039-046.jpg JF7_031729small--qual=039-046.jpg JF7_031729crop--qual=039-046.jpg
After the plugin creates the various copies, you can have them imported back into Lightroom for easy inspection. In Lightroom 3 or later, for even more convenience, they're brought into a collection along with the original:
You can also have a small dialog that reports the various sizes, as seen in the first image at the top of this post.
The post-processing options are disabled if the plugin has not been registered after the six-week trial period. See the next section for information about registering. (Registration is generally free except for a 1-cent PayPal fee.)
This plugin is distributed as “donationware”. I have chosen to make it available for free — everyone can use it forever, without cost of any kind — but unless registered, its functionality is somewhat reduced after six weeks. Registration is done via PayPal, and if you choose to register, it costs the minimum 1-cent PayPal fee; any amount you'd like to add beyond PayPal's sliding fees as a gift to me is completely optional, and completely appreciated. For details, see my blog post titled Lightroom Plugin Development: Now With Added Encouragement. If you're interested in how I picked up a plugin-development hobby like this, see My Long Path To Lightroom Plugin Development.
( Update Log via RSS )
|20131031.22||The export target no longer defaults to the system temp folder... that just ends up being confusing.|
|20131031.21||Better error message if an image can't be rendered.|
|20130613.20||Better support for plugin revalidation.|
|20130611.19||Yet another Lr5 update|
|20130524.18||Apparently, a recent change broke things on Lr2, which some folks apparently still use.|
|20130501.17||Update for Lr5|
|20130412.16||Build system update.|
|20130328.15||Fix for the registration system.|
|20130209.14||More build-system maintenance|
|20130206.13||Tweak for my registration system|
|20120608.11||Fix an "attempt to perform arithmetic on field" error.|
Update to handle the Mac App Store version of Lightroom.
Tweak for Lr4.1RC2.
Enhanced the send-log dialog to hopefully make reports more meaningful to me, yielding, I hope, the ability to respond more sensibly to more reports.
|20120330.9||Update to handle 4.1RC|
|20120309.8||Had broken registrations in Lr2; Update to the debug logging to better track down timing issues that might arise.|
More on the march toward Lr4, including upheaval in the code to handle Lightroom APIs being discontinued in Lr4.
|20120114.6||More tweaks for Lr4b|
Update for Lr4 beta: explain in the plugin manager that the plugin can't be registered in the beta.
Error when invoking the plugin with multiple photos chosen.
Had issues with the registration button sometimes not showing.
When doing a plugin upgrade, offer the ability to flush all the old copies of the plugin.
Added a system-clock check and reports to the user if the system clock is more than a minute out of date. An incorrect system clock can cause problems with various kinds of communication and authentication with some of my plugins, so I've just gone ahead and added this to every plugin.
|20110929.3||The new-version check didn't always work correctly. Fixed a build problem that could have caused plugin errors.|
|20101213.2||Updated “kb” to “kB”. (I've never been able to keep these things straight). Added an option to include the resulting file size in the filename itself.|