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Select Subject Not Working

New Here ,
Apr 22, 2024 Apr 22, 2024

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I have noticed in the last few weeks that the Lightroom Classic, Select Subject, feature is not working or is wildly inacurate. I just edited an image of a single man with a white background and I wanted to isolate him, so I used select subject. The outcome was aweful. It left out his hat and partially blended his skin while missing or leaving out other aspects of his cloting. The selection was blotchy, unndcessarly blended, and unusable. This has been happening more and more the last few weeks and makes the feature unusable.  

 

Lightroom Classic version: 13.2
License: Creative Cloud
Language setting: en-US
Operating system: Mac OS 14
Version: 14.4.0
Application architecture: x64 (emulated)
Logical processor count: 16
Processor speed: 2.4GHz
SqLite Version: 3.36.0
Built-in memory: 65,536.0 MB
Dedicated GPU memory used by Lightroom: 2,034.3MB / 49,152.0MB (4%)
Real memory available to Lightroom: 65,536.0 MB
Real memory used by Lightroom: 2,113.0 MB (3.2%)
Virtual memory used by Lightroom: 48,783.5 MB
Memory cache size: 17.8MB
Internal Camera Raw version: 16.2 [ 1763 ]
Maximum thread count used by Camera Raw: 5
Camera Raw SIMD optimization: SSE2
Camera Raw virtual memory: 613MB / 32767MB (1%)
Camera Raw real memory: 620MB / 65536MB (0%)

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Community Expert ,
Apr 22, 2024 Apr 22, 2024

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Try if disabling the GPU in Preferences - Performance improves it.

 

-- Johan W. Elzenga

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LEGEND ,
Apr 22, 2024 Apr 22, 2024

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Use People masking to select people -- Subject masking often does significantly worse with people.

 

The option Preferences > Performance > Use Graphics Processor has no impact on any of LR's AI commands.

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