While exploring ways to simplify the infrared workflow in Lightroom, I considered writing a Lightroom plug-in. This plug-in would replace the round-trip to Photoshop, by performing a red/blue color swap, and then returning the output to Lightroom.
Ultimately, the Local Hue Adjustment and LUT (upcoming post) methods provide a better infrared workflow in Lightroom, since they do not create an extra PSD or TIFF file in addition to the original raw file.
For this plugin, I would have leveraged ImageMagick, the command line image editor, to perform the color swap. This could be done via a channel swap, swapping the reds and the blues, or by inverting the layer and blending it with the original.
Input white balanced 590nm infrared image
ImageMagick output with channel swap
ImageMagick output with invert blend
Here are the ImageMagick commands to perform these actions.
Channel Swap via ImageMagick
magick convert input.tif -separate -swap 0,2 -combine output.tif
Invert Blend via ImageMagick
magick convert input.tif ( -clone 0 -negate ) -compose Hue -composite output.tif
While I won’t continue working on this as a Lightroom plugin, I wanted to share this progress. If AI ever gets savvy enough to set the white balance on an infrared image, then this could be used to batch processing infrared images.