Lightroom Classic 15.4 Sharpens Object Masks, Halves AI Denoising Time on Apple Silicon
Updated
Updated · Fstoppers · Jun 20
Lightroom Classic 15.4 Sharpens Object Masks, Halves AI Denoising Time on Apple Silicon
3 articles · Updated · Fstoppers · Jun 20
Summary
Version 15.4 upgrades Select Object to version 5, with side-by-side tests showing cleaner hair edges and more complete object picks than 15.3.1 across portraits, trees, birds and group shots.
A new duplicate-detection tool scans the full catalog after users enable it in metadata settings, then stacks matching files for removal from either the catalog alone or the disk.
On a 25,000-image catalog, the scan finished in 5 to 10 minutes; a roughly 250,000-image library took about an hour, with some interface quirks in the cleanup workflow.
Apple silicon Macs get the other major gain: AI denoising is about 50% faster, cutting one test image from roughly 18 seconds to 7 to 9 seconds, while Intel Macs and PCs see no speedup.
The update also auto-backs up older catalogs by zipping them before upgrade, reducing risk for users installing the new release.