一 | IT之家 7 月 21 日消息，科技媒体 The Decoder 昨日（7 月 20 日）发布博文，报道称谷歌 DeepMind 发布 GenCeption 模型，将预训练的视频生成器重新用于深度估计和分割等经典计算机视觉任务。
二 | London, Oct 18 (UNI) Former British military pilots are being lured to China with large sums of money to pass on their expertise to the Chinese military, it is claimed.
Up to 30 former UK military pilots are thought to have gone to train members of China's People's Liberation Army, BBC reported.
The UK is issuing an intelligence alert to warn former military pilots against working for the Chinese military, the BBC said.
Attempts to headhunt pilots are ongoing and had been ramping up recently, Western officials say.
A spokesperson from the Ministry of Defence said the training and the recruiting of pilots does not breach any current UK law but officials in the UK and other countries are trying to deter the activity, the report said.
"It is a lucrative package that is being offered to people," said one official. "Money is a strong motivator." Some of the packages are thought to be as much as $270,000.
The retired British pilots are being used to help understand the way in which Western planes and pilots operate, information which could be vital in the event of any conflict, such as over Taiwan.
"They are a very attractive body of people to then pass on that knowledge," a Western official said. "It's taking Western pilots of great experience to help develop Chinese military air force tactics and capabilities."
The UK first became aware of a small number of cases of former military pilots being recruited in 2019 which were dealt with on a case-by-case basis, the BBC said.
The Covid-19 pandemic slowed attempts down, when travel to China was almost impossible but the attempts have now increased, leading to this alert.
The pilots have experience on fast jets and helicopters and come from across the military and not just the Royal Air Force. They have flown Typhoons, Jaguars, Harriers and Tornados.
F-35 pilots are not thought to be involved although China is thought to be interested in them. Some of the pilots are in their late 50s and left the military some time ago.
Pilots of other allied nations have also been targeted.
"We are taking decisive steps to stop Chinese recruitment schemes attempting to headhunt serving and former UK Armed Forces pilots to train People's Liberation Army personnel in the People's Republic of China," a Defence Ministry spokesperson said.
"All serving and former personnel are already subject to the Official Secrets Act, and we are reviewing the use of confidentiality contracts and non-disclosure agreements across Defence, while the new National Security Bill will create additional tools to tackle contemporary security challenges - including this one."
UNI MR。
IT之家援引博文介绍，大语言模型在学习预测下一个 Token 的时候，在训练过程中往往需要吸收语法、世界知识和上下文关系等内容。
但是在计算机视觉领域，视觉模型缺少等效的训练方法，主要由专业模型主导，包括用于分割的“Segment Anything”和用于深度估计的“Depth Anything”，每个模型都使用其特定的架构。
谷歌 DeepMind 团队为此提出 GenCeption 模型方案，尝试将一个“生成视频”的 AI 模型逆向改造成一个能“理解世界”的视觉分析引擎。
GenCeption 打破了传统计算机视觉“一个任务一个专用模型”的格局，仅凭单一模型就能同时做好深度估计、图像分割、3D 姿态估计、表面法线预测和相机姿态估计等核心视觉任务。
三 | GenCeption 基于阿里巴巴开源视频模型通义万相 Wan2.1 系列训练，与传统扩散模型需多步去噪不同，GenCeption 在一次前向传播中完成预测，从而提升视觉任务处理速度。模型通过文本提示指定任务，可输出深度图、表面法线图、分割掩码，并可处理相机运动表示。 训练数据以合成为主。
四 | 论文称，数据集仅包含 7500 段视频，由 800 个数字人体模型与 200 段动作捕捉序列组合生成，再通过 Blender 在不同背景和镜头角度下渲染。 泛化方面，GenCeption 几乎只在单人合成视频上训练，但可处理真实多人视频，也可迁移到动物和类人机器人类别。论文称，部分输出细节甚至超过训练时 Blender 渲染结果，可保留猫胡须和单根发丝边缘。
五 | 性能方面，论文给出两组处理时间数据：小模型处理 81 帧视频约需 6 秒；大模型参数量为 140 亿，处理同样长度视频约需 10 秒。 参考。
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