Transposing Black to White in TIF & JPG Images

Question

I have a large number of tif and jpg images with coloured lines (scope traces if it matters) on a black background. Only the background is black. I want a quick simple way to change the black pixels to white, maybe a little excutable run off a Win command line. Alternatively maybe Gimp or Photopad, both of which I have? Any suggestions appreciated.

Answer 1

Have you considered Imagemagick?

An example of the command would be:

convert SOURCE.jpg -fuzz 10% -fill white +opaque black -fill white -opaque black DESTINATION.jpg

Source: http://www.laurii.info/2011/07/replace-colour-image-imagemagick-batchable/