Turning and Image into an Outline Drawing
Let's turn this photo of a guitar into an outline drawing.
Start by duplicating your layer so you have 2 layers with the guitar photo on it.
Then, on the top layer, apply the Edges filter under Filter ▸ Stylize ▸ Edges.
The menu will appear, adjust the intensity of the outline. Click Apply.
Your image will now look like this.
Now create a new layer on top of your outline layer. Fill this new layer in with black and set the blending mode to Hue. This will make the outline white. Merge the black fill layer down (Command+E) into the outline layer so they become one layer.
Now, go to Filter ▸ Color Effect ▸ Color Invert.
This will make the background white, and the outline black.
And your outline is done and free to colorize any way you choose.
