Abstract This paper presents an automatic image-based approach for converting greyscale images to pencil sketches, in which strokes follow the image features. The algorithm first extracts a dense direction field automatically using Logical/Linear operators which embody the drawing mechanism. Next, a reconstruction approach based on a sampling-and-interpolation scheme is introduced to generate stroke paths from the direction field. Finally, pencil strokes are rendered along the specified paths with consideration of image tone and artificial illumination. As an important application, the technique is applied to render portraits from images with little user interaction. The experimental results demonstrate that the approach can automatically achieve compelling pencil sketches from reference images.

Pencil sketches in photoshop for those of you who might want to see a pencil sketch of you or your dear ones, here is a simple way to do it. first of all you need to have adobe photoshop cs3. this tool can turn even the worst of photos into a mastre piece. a lot of photo transformations are possible with this tool and creating a pencil portarit is one of the coolest of them. you can even make a canvas sketch of the photos in a very descent way. as for my personal experience, i have creates even web templates using this powerful tool. now once you have it in your system, this cool application can turn a simple photo into a master piece. just follow these steps

step1: file->open (the "file" option can be seen on the top left corner of your cs3 window)
step2: from the open dialog box that pops up,open the photo which you like to be seen as a pencil sketch
step3: filter->other->high pass (the filter is the sixth menu option starting from the extreme left of ypur screen)
step4: image->adjustments->threshold ("image" is the third option from the left of your cs3 window)
step5: vary the threshold level accordingly to get the desired effect!!

thats it, your pencil portrait is ready !

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