You can use one of the options on the Colours section of the Extensions menu (for example, try Black & White, or possibly Desaturate or Grayscale) but if you're working with colour in photos, you'd be far better using a program like Gimp, which is designed for raster (pixel-based) images like photographs, rather than Inkscape which is for vector graphics. You'll have better control in Gimp on the final look of the photo.
If it's a photo, in Inkscape a filter (Filters > Color > Greyscale) or a Raster extension (Extensions > Raster > HSB adjust) will work to desaturate raster images. The filter only changes the image's appearance, while the extension will actually edit the image data (can't be undone after saving the file and closing Inkscape).
z3z is right, though, that it makes more sense to use a photo editor to edit photos.
How Do You Use Inkscape? How do I make a photo black and white?
Inkscape.org
Hi!
If I just want to make a photo black and white (nothing more, and not with any special effects or anything), how do I do that?
Thanx for your help and have a continued nice day!
Take care!
Sincerely,
Ann
You can use one of the options on the Colours section of the Extensions menu (for example, try Black & White, or possibly Desaturate or Grayscale) but if you're working with colour in photos, you'd be far better using a program like Gimp, which is designed for raster (pixel-based) images like photographs, rather than Inkscape which is for vector graphics. You'll have better control in Gimp on the final look of the photo.
If it's a photo, in Inkscape a filter (Filters > Color > Greyscale) or a Raster extension (Extensions > Raster > HSB adjust) will work to desaturate raster images. The filter only changes the image's appearance, while the extension will actually edit the image data (can't be undone after saving the file and closing Inkscape).
z3z is right, though, that it makes more sense to use a photo editor to edit photos.