Here's a few simple steps to generate variations of line art from your digital photos.
The source image used in this tutorial is from AbsolutVision.com. Register today for a great high resolution image of the week or for a cost effective monthly or yearly memebrship.
To begin, have the target image layer selected, as I have captured above.
Next, go 'Filter/Blur/Smart Bur' as I have captured below.
From the 'Smart Bur' dialog, make sure the 'Edge Only' Mode is selected and toy with the 'Radius'/'Threshold' sliders. The objective is to ensure that an edge line covers the entire image with some overspill into the interior of the image as well.
This will produce a similar result as below.
Next, with the same image layer active, go 'Image/Adjustments/Invert', as I have captured below.
Inverting produces the below resulting image.
The above result is quite satisfactory, but to add to the edge effects of the line art, go 'Filter/Artistic/Cutout' as I have captured below.
Depending on how thick you want the lines, adjust the Cutout sliders for the desired effect.
Here is the final result.
Other samples below:
Summary:
1. Smart Blur with Edges Only Mode
2. 'Ctrl + I' to invert the result of the Smart Blur.
3. 'Filter/Artistic/Cutout' for smooth line definitions.