Step 1.
Open up your image and go to: Image->Adjustments->Desaturate (or press Ctrl + Shift + U) on your keyboard.
Step 2.
Next using the Lasso Selection tool, or the Pen tool carefully select the contour of your image, and remove the background of the image such as I have done here:
Press Ctrl + D to deselect the area.
Step 3.
Next go to: Filter->Artistic->Cutout, and apply these settings:
You will need to adjust the "No. of Levels" value to anyone from 2 - 4 depending on the complexity of your image.
Step 4.
Press Ctrl + L on your keyboard to open up the "levels adjustment" panel, and apply similar settings to your image. You may need to move the sliders around to get a good visible area in your image, just move the small nodes to the right or left:
Here's what you'll end up with:
Step 5.
Now if you'd like to smooth the image out a bit so it looks more like it was done in ink follow these two easy steps.
Step 6.
Go to Filter->Blur->Gaussian Blur and apply these settings:
Step 7.
Next press Ctrl + M on your keyboard to open up the "Curves Adjustment" panel and apply these settings:
Step 8.
Here's how my image ended up after the curve adjustment:
All you need to do is adjust the settings slightly to get the best looking image. I know this one is a little dark silhouettes are created in photoshop.
