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Convert grayscale to rgb in LR classic

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ArminGrossenbacher

New Member
Joined
Jul 3, 2019
Messages
1
Lightroom Version Number
LR classic
Operating System
  1. Windows 10
After scanning black and white pictures they are tif in grayscale mode. Siver efex cannot open these files. After changing mode to rgb in Photoshop silver efex can. Can I change to rgb in LR, too? Or is always PS they way to g?
 
Solution
Photoshop will work. But you can change them in Lightroom Classic too, by exporting new copies of them. If the problem is that SilverEfex won’t recognize grayscale and requires RGB, Lightroom Classic export should help because Lightroom Classic is actually incapable of keeping them in grayscale mode on export. The only color spaces supported for export are RGB spaces and printer profiles.

In other words some people have this problem in reverse: They want a grayscale mode file out of Lightroom Classic and it can’t provide it, it has to be done in Photoshop.

Note that either way, modified files will be provided to Silver Efex:
  • If you do this in Lightroom Classic, you are exporting copies as RGB TIFF files, leaving the originals...
Photoshop is the way to go, because Lightroom is a non-destructive editor that does not change the originals.
 
Photoshop will work. But you can change them in Lightroom Classic too, by exporting new copies of them. If the problem is that SilverEfex won’t recognize grayscale and requires RGB, Lightroom Classic export should help because Lightroom Classic is actually incapable of keeping them in grayscale mode on export. The only color spaces supported for export are RGB spaces and printer profiles.

In other words some people have this problem in reverse: They want a grayscale mode file out of Lightroom Classic and it can’t provide it, it has to be done in Photoshop.

Note that either way, modified files will be provided to Silver Efex:
  • If you do this in Lightroom Classic, you are exporting copies as RGB TIFF files, leaving the originals unchanged.
  • If you do this in Photoshop, you are changing the color mode of each file and then you must save that change, altering the originals.
Don’t be surprised if the file sizes gets bigger. RGB TIFF files are typically larger than grayscale TIFF files because they have three channels instead of one. Applying the ZIP compression option to the TIFF format can help keep the RGB file size closer to grayscale, if no color has been added yet.
 
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