We present an interactive approach to synthesizing realistic variations in
facial hair in images, ranging from subtle edits to existing hair to the
addition of complex and challenging hair in images of clean-shaven subjects. To
circumvent the tedious and computationally expensive tasks of modeling,
rendering and compositing the 3D geometry of the target hairstyle using the
traditional graphics pipeline, we employ a neural network pipeline that
synthesizes realistic and detailed images of facial hair directly in the target
image in under one second. The synthesis is controlled by simple and sparse
guide strokes from the user defining the general structural and color
properties of the target hairstyle. We qualitatively and quantitatively
evaluate our chosen method compared to several alternative approaches. We show
compelling interactive editing results with a prototype user interface that
allows novice users to progressively refine the generated image to match their
desired hairstyle, and demonstrate that our approach also allows for flexible
and high-fidelity scalp hair synthesis.

采用神经网络处理的图像合成方法，通过人工繁琐的建模，渲染和复合形成目标发型的三维几何形状来合成真实的面部毛发变化，使用户能够通过简单的引导笔画来进一步指导和修整所生成的图像。此方法不仅可以控制结构和颜色特征，而且发夹名单可以灵活地扩展和生成高保真头皮发。