Removing unwanted color, make just b & w

[Ofnuts]

(02-03-2022, 11:19 AM)carljong Wrote: Is there an easy way to make a photo of sheet music just black and white?  I've been working on pages, using Color > Curves and this one turned out with yellow.  I've tried a few suggestions on the internet, but no luck.  Seems it should be simple.

I tried attaching my photo but keep getting an error.

Thanks

You get a color shift because a color saturates before the others. You can convert the image to B&W using Colors ➤ Desaturate. Changing the image mode to grayscale is another way but it has implications...