Image-based Portrait Engraving
This is an incremental improvement for digital artists or designers seeking enhanced portrait stylization tools.
The paper tackles portrait engraving by using face detection to warp a dither matrix around a cylindrical head proxy, resulting in curved engraving lines for improved stylization, and demonstrates an extension to color engraving.
This paper describes a simple image-based method that applies engraving stylisation to portraits using ordered dithering. Face detection is used to estimate a rough proxy geometry of the head consisting of a cylinder, which is used to warp the dither matrix, causing the engraving lines to curve around the face for better stylisation. Finally, an application of the approach to colour engraving is demonstrated.