In this Photoshop tutorial I'm showing a recently discovered technique that I haven't seen anywhere else and that's the reason why I'm sharing it with you. The technique is based on two filters:
Open an image that doesn't have a lot of rough textures, because like with the other techniques the results are not going to be that good.
In my example I've opened the image of a clock in Photoshop.
Duplicate this background layer by clicking on its icon in the layers palette and while holding the mouse button, drag and drop it on the Create a New Layer icon .
First press Ctrl + D (Command + D on the Mac) to change the foreground color to black:
Select in the menu: Filter / Other / High Pass
Select a very small radius. The radius depends on the size of the image. In my example I've chosen a radius of only 0.3 pixels.
Just make sure that you don't use too much radius like in this example:
Select in the menu: Filter / Sketch / Note Paper...
Use the following values:
- Image Blance: 25 (depends on the image, experiment)
- Graininess: 0
- Relief: 0
The result looks like this:
In our previous step the lines are not black but some shade of gray. We can change this by adding a threshold correction.
Select in the menu: Image / Adjustments / Threshold...
Move the slider to the right until you see a black & white drawing of the image. In my example a Threshold Level of 180 was enough.
Here's the result:
Go to the tool bar and select the Pencil Tool and set the foreground to white by pressing X on your keyboard (this switches the fore- and background colors)
Now remove some a the few distracting pixels by clicking on them with the pencil tool. Make sure that you zoom in and that you use a small sized pencil.
(Thanks to Lunacore.com)