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+--- Thread: convert a layer to greyscale (/Thread-convert-a-layer-to-greyscale)
convert a layer to greyscale - metulburr - 11-15-2016
Every time i need to make a layer greyscaled, i need to load the layer as a whole new project, Image -> Mode -> greyscale, then convert back to RBG. Export it. Then load that image as a new layer to my project.
Can i simplify this more to just convert a layer to greyscale?
RE: convert a layer to greyscale - Ofnuts - 11-16-2016
Colors>Desaturate with three standard choices of color conversion, or, if you feel more adventurous, Color>Components>Channel mixer (and tick the "Monochrome" check box). In addition to working in a single layer, they will also take the selection in account.
<pedantic>Either choice gives you a gray layer (3 bytes per pixel, with R=G=B) but not a grayscale one (one byte/pixel)</pedantic>
RE: convert a layer to greyscale - rich2005 - 11-16-2016
It is worth mentioning this article
http://blog.patdavid.net/2012/06/true-pseudogrey-in-gimp.html
and if you read through it, the referenced script.
RE: convert a layer to greyscale - Ofnuts - 11-16-2016
Also, the weird recipe:
- set the bucket-fill tool to "Saturation" mode
- bucket-fill the layer with white
- Alongside the usual RGB model, another possible color representation model is HSV (Hue, Saturation, Value), saturation being how "colored" things are.
- By setting the tool to "Saturation" mode, only the saturation of the painting color is used, in other words in each pixel, RGB is convert to HSV, S is set to 0, and HSV is converted back to RGB.
- And removing the saturation is one way to make everything gray.