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Using Brightness-Contrast color tool in grayscale mode image

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Using Brightness-Contrast color tool in grayscale mode image
Ambulation Offline
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#1
02-07-2018, 05:02 AM
I've been working in an image set to grayscale mode. It's in preparation for a publication that will only accept images that are naturally grayscale in this mode (these are from a scanning electron microscope-all pixels assigned grey values only). I'm working in the most up to date version of GIMP-2.8.22 in Win7.

There are some layers in which I wish to make minor edits to the brightness and contrast, but the tool makes no visible change to the layer (which is in a layer group) I have selected. There are no changes in the preview mode or when i press OK. Is it possible this feature is not usuable in greyscale, but only RGB mode?
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Espermaschine Offline
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#2
02-07-2018, 07:18 AM
It works for me.
Both on a normal layer and in a layergroup.
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Ofnuts Offline
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#3
02-07-2018, 08:27 AM
(02-07-2018, 05:02 AM)Ambulation Wrote: I've been working in an image set to grayscale mode. It's in preparation for a publication that will only accept images that are naturally grayscale in this mode (these are from a scanning electron microscope-all pixels assigned grey values only). I'm working in the most up to date version of GIMP-2.8.22 in Win7.

There are some layers in which I wish to make minor edits to the brightness and contrast, but the tool makes no visible change to the layer (which is in a layer group) I have selected. There are no changes in the preview mode or when i press OK. Is it possible this feature is not usuable in greyscale, but only RGB mode?

There are no restriction in grayscale (unlike color-indexed). Are layers in something else than "Normal" mode? Otherwise see the checklist
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