We propose a method for synthesizing photo-realistic digital avatars from only one portrait as the reference. Given a portrait, our method synthesizes a coarse talking head video using driving keypoints features. And with the coarse video, our method synthesizes a coarse talking head avatar with a deforming neural radiance field. With rendered images of the coarse avatar, our method updates the low-quality images with a blind face restoration model. With updated images, we retrain the avatar for higher quality. After several iterations, our method can synthesize a photo-realistic animatable 3D neural head avatar. The motivation of our method is deformable neural radiance field can eliminate the unnatural distortion caused by the image2video method. Our method outperforms state-of-the-art methods in quantitative and qualitative studies on various subjects.

我们提出了一种从只有一个肖像作为参考的照片逼真数字化头像的合成方法。该方法使用驱动关键点特征合成粗糙的说话头视频。使用粗糙视频，该方法使用变形神经辐射场合成粗糙的说话头头像。通过渲染粗糙头像的图像，该方法使用盲目人脸修复模型更新低质量图像。通过更新后的图像，我们重新训练以获得更高质量的头像。经过几轮迭代，我们的方法可以合成逼真的可动画的3D神经头像。我们的方法通过在各种主题上进行定量和定性研究超越了最先进的方法。

OPHAvatars: 一次成像逼真的头像