I am using Xara Photo & Graphic Designer 9 and a Wacom Intuos Pen & Touch Tablet to etch over old photos. Then I delete the photo leaving an old-time woodcut-style white-on-black image. Here are some examples. Just one color (white) for all the lines (thousands in the case of Teddy Roosevelt).

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Theodore Roosevelt

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John Muir, founder of the Sierra Club

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Coo Coo Ca Choo, I am the Walrus