The author is Alexey Pasko. The example is made by means of Adobe Photoshop CS with the plugins AKVIS Enhancer and AKVIS Sketch.
Alexey decided to change one of his photos made on a motorshow into a pencil drawing.
Let's create a background layer copy and call AKVIS Enhancer plug-in on this layer. The plug-in will help us to increase details in the photo's shadows.
Now by using Unsharp Mask filter we increase sharpness of the photo to enhance details even more. Apply Unsharp Mask filter with the following settings: Amount - 70%, Radius - 0.5 pixels, Threshold - 0 levels.
After AKVIS Enhancer correction and application of Unsharp Mask filter the photo looks like this:
Change settings: decrease Midtones Intensity down to 4 and increase Sharpen up to 70. All other settings remain default.
The square in the photo is tiled and AKVIS Sketch draw it thoroughly. But too many strokes make the drawing dirty and divert attention from the subject. We could of course blur the tiles before applying AKVIS Sketch, but chose another way.
Apply modifications by pressing in the upper right corner of the plug-in window.
There has become fewer strokes, but the sharpness of the tiles is left intact to a large degree.
The Layers palette at this stage looks like this:
And here is the resulted pencil drawing: