jarnoh / lrjpegrescan

JPEGrescan plugin for Adobe Photoshop Lightroom

JPEGrescan plugin for Adobe Photoshop Lightroom

Lightroom plugin by Jarno Heikkinen [email protected]
Based on jpegrescan by Loren Merritt

Introduction

This is a simple Lightroom export plugin, which attempts to reduce JPEG files by using different lossless compression parameters on the exported file.

There are two modes of operation; fast mode which uses static scans file; and a brute-force method using jpegrescan script. jpegrescan is always smallest, but it can take several seconds per image.

Currently, only Mac OS X is supported with jpegrescan; I don't have a working Windows environment available for development or testing (jpegrescan requires Perl and jpegtran).

Simply install the plugin and add the export filter in the Lightroom's export dialog. In the export settings, you can also optionally set removal of ALL metadata, including ICC profiles and such.

You can also see some byte statistics in the plugin manager.

jpegtran

Mac OS X binary of jpegtran was compiled from jpegsrc.v9.tar.gz with commands:

./configure -disable-shared CFLAGS="-Os -arch i386 -arch x86_64 -mmacosx-version-min=10.5" LDFLAGS="-arch i386 -arch x86_64 -mmacosx-version-min=10.5" --disable-dependency-tracking
make jpegtran
strip jpegtran