Pose and body shape editing in a human image has received increasing
attention. However, current methods often struggle with dataset biases and
deteriorate realism and the person's identity when users make large edits. We
propose a one-shot approach that enables large edits with identity
preservation. To enable large edits, we fit a 3D body model, project the input
image onto the 3D model, and change the body's pose and shape. Because this
initial textured body model has artifacts due to occlusion and the inaccurate
body shape, the rendered image undergoes a diffusion-based refinement, in which
strong noise destroys body structure and identity whereas insufficient noise
does not help. We thus propose an iterative refinement with weak noise, applied
first for the whole body and then for the face. We further enhance the realism
by fine-tuning text embeddings via self-supervised learning. Our quantitative
and qualitative evaluations demonstrate that our method outperforms other
existing methods across various datasets.

人物图像中的姿势和身体形状编辑一直受到越来越多的关注。然而，当前的方法在处理大幅度编辑时往往受到数据集偏见的困扰，导致逼真度和人物身份的退化。我们提出了一种一次性方法，可以实现大幅度编辑并保留身份信息。为了实现大幅度编辑，我们使用一个 3D 人体模型进行拟合，将输入图像投影到 3D 模型上，并改变人体的姿态和形状。由于初始纹理身体模型存在由于遮挡和不准确的身体形状引起的伪影，渲染图像经历了一种基于扩散的细化过程，在这个过程中，强噪声破坏了身体结构和身份，而不充分的噪声并没有起到帮助作用。因此，我们提出了一种迭代细化方法，首先对整个身体进行弱噪声处理，然后对脸部进行细化。通过自监督学习进一步增强了真实感，通过微调文本嵌入。我们的定量和定性评估表明，我们的方法在各种数据集上优于其他现有方法。

基于扩散的人体姿态和形状编辑

Diffbody: Diffusion-based Pose and Shape Editing of Human Images

This paper proposes a new procedure called quantum shadow gradient descent
(QSGD) that addresses these key challenges. Our method has the benefits of a
one-shot approach, in not requiring any sample duplication while having a
convergence rate comparable to the ideal update rule using exact gradient
computation. We propose a new technique for generating quantum shadow samples
(QSS), which generates quantum shadows as opposed to classical shadows used in
existing works. With classical shadows, the computations are typically
performed on classical computers and, hence, are prohibitive since the
dimension grows exponentially. Our approach resolves this issue by measurements
of quantum shadows. As the second main contribution, we study more general
non-product ansatz of the form $\exp\{i\sum_j \theta_j A_j\}$ that model
variational Hamiltonians. We prove that the gradient can be written in terms of
the gradient of single-parameter ansatzes that can be easily measured. Our
proof is based on the Suzuki-Trotter approximation; however, our expressions
are exact, unlike prior efforts that approximate non-product operators. As a
result, existing gradient measurement techniques can be applied to more general
VQAs followed by correction terms without any approximation penalty. We provide
theoretical proofs, convergence analysis and verify our results through
numerical experiments.

该论文提出了一种名为量子阴影梯度下降 (QSGD) 的新程序，以解决一次性方法、量子阴影样本生成和非乘积态哈密顿量等相关问题，并通过理论证明、收敛分析和数值实验验证了其结果。

量子影子梯度下降法用于量子学习

Quantum Shadow Gradient Descent for Quantum Learning

Recently, voice conversion (VC) without parallel data has been successfully
adapted to multi-target scenario in which a single model is trained to convert
the input voice to many different speakers. However, such model suffers from
the limitation that it can only convert the voice to the speakers in the
training data, which narrows down the applicable scenario of VC. In this paper,
we proposed a novel one-shot VC approach which is able to perform VC by only an
example utterance from source and target speaker respectively, and the source
and target speaker do not even need to be seen during training. This is
achieved by disentangling speaker and content representations with instance
normalization (IN). Objective and subjective evaluation shows that our model is
able to generate the voice similar to target speaker. In addition to the
performance measurement, we also demonstrate that this model is able to learn
meaningful speaker representations without any supervision.

本文提出了一种使用仅一次源和目标说话者示例语音，通过实例归一化来分解说话者和语音内容表示的一次性语音转换方法，无需事先见过源和目标说话者训练模型即可执行声音转换，目标语音及说话者的相似性得到了客观和主观的评估，同时表明该模型可以在没有任何监督的情况下学习含义深层次的说话者表示。