You may also want to run a sharpening filter like Photoshop's unsharp mask at this point to bring things back into sharper focus, or you might want to adjust the contrast a bit to accentuate differences in color. At this point, with any luck you will have gone from something like the original image above to a sharp color version as shown to the right. There are a few things to be wary of in the colorization process. The most obvious is adding too much color or too much variety so that the image becomes a riot of conflicting textures and colors. You have to go along with what the artist put in there originally and change your technique if you are getting a jarring or muddy result.
Some lithographs can be extraordinarily complex.
If there are lots of figures and small details you may be overwhelmed by the process. An image of mounted royal hussars on parade from the London Illustrated News comes to mind. Trying to apply a cloth texture to dozens of uniforms, add variety to the crowd in the background, give a leather texture to belts and bandoliers, put silver on sabres and add a wood texture to lances and rifle-stocks is just too much detail to take on unless you are very dedicated or have way too much time on your hands. This colorization technique works best with landscapes with limited numbers of distinct figures in them. The process is actually one of adding color but minimizing detail to some extent, to produce a pleasing overall result.