我们提出了一种新颖的计算模型“ Savir-T”,用于在Raven的渐进式矩阵(RPM)中体现的视觉推理问题。我们的模型考虑了拼图中每个图像中视觉元素的显式空间语义,编码为时空视标,并了解内部图像以及图像的依赖依赖性依赖性,与视觉推理任务高度相关。通过基于变压器的SAVIR-T体系结构建模的令牌关系,提取组(行或列)通过利用组规则相干性并将其用作电感偏置来提取前两行中的基本规则表示形式,从而引起了提取组(行或列)驱动的表示形式(或列)RPM中的每个令牌。我们使用此关系表示形式来找到正确的选择图像,该图像完成了RPM的最后一行或列。在两个合成RPM基准测试中进行了广泛的实验,包括Raven,I-Raven,Raven-Fair和PGM以及基于自然图像的“ V-Prom”,这表明Savir-T为视觉设定了新的最新时间推理,超过了先前模型的性能。
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解决视觉推理测试的计算学习方法,例如Raven的渐进式矩阵(RPM),非常取决于识别测试中使用的视觉概念(即表示)以及基于这些概念(即,推理)。然而,学习表示和推理是一项具有挑战性且不足的任务,经常以舞台的方式(首先表示,然后推理)接近。在这项工作中,我们提出了一个端到端的联合代表性学习框架,该框架利用了弱的归纳偏见形式来共同改善这两项任务。具体而言,我们引入了RPMS,GM-RPM的一般生成图形模型,并将其应用于解决推理测试。我们使用基于GM-RPM原理的基于基于的抽象推理网络(DAREN)的新型学习框架来完成此操作。我们对Daren进行了多个基准数据集的经验评估。 Daren在推理和分离任务上都表现出对最先进的模型(SOTA)模型的一致改进。这证明了分离的潜在表示与解决抽象视觉推理任务的能力之间的密切相关性。
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Purpose: Tracking the 3D motion of the surgical tool and the patient anatomy is a fundamental requirement for computer-assisted skull-base surgery. The estimated motion can be used both for intra-operative guidance and for downstream skill analysis. Recovering such motion solely from surgical videos is desirable, as it is compliant with current clinical workflows and instrumentation. Methods: We present Tracker of Anatomy and Tool (TAToo). TAToo jointly tracks the rigid 3D motion of patient skull and surgical drill from stereo microscopic videos. TAToo estimates motion via an iterative optimization process in an end-to-end differentiable form. For robust tracking performance, TAToo adopts a probabilistic formulation and enforces geometric constraints on the object level. Results: We validate TAToo on both simulation data, where ground truth motion is available, as well as on anthropomorphic phantom data, where optical tracking provides a strong baseline. We report sub-millimeter and millimeter inter-frame tracking accuracy for skull and drill, respectively, with rotation errors below 1{\deg}. We further illustrate how TAToo may be used in a surgical navigation setting. Conclusion: We present TAToo, which simultaneously tracks the surgical tool and the patient anatomy in skull-base surgery. TAToo directly predicts the motion from surgical videos, without the need of any markers. Our results show that the performance of TAToo compares favorably to competing approaches. Future work will include fine-tuning of our depth network to reach a 1 mm clinical accuracy goal desired for surgical applications in the skull base.
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Recent advances in deep learning research, such as transformers, have bolstered the ability for automated agents to generate creative texts similar to those that a human would write. By default, transformer decoders can only generate new text with respect to previously generated text. The output distribution of candidate tokens at any position is conditioned on previously selected tokens using a self-attention mechanism to emulate the property of autoregression. This is inherently limiting for tasks such as controllable story generation where it may be necessary to condition on future plot events when writing a story. In this work, we propose Future Sight, a method for finetuning a pretrained generative transformer on the task of future conditioning. Transformer decoders are typically pretrained on the task of completing a context, one token at a time, by means of self-attention. Future Sight additionally enables a decoder to attend to an encoded future plot event. This motivates the decoder to expand on the context in a way that logically concludes with the provided future. During inference, the future plot event can be written by a human author to steer the narrative being generated in a certain direction. We evaluate the efficacy of our approach on a story generation task with human evaluators.
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We study the task of training regression models with the guarantee of label differential privacy (DP). Based on a global prior distribution on label values, which could be obtained privately, we derive a label DP randomization mechanism that is optimal under a given regression loss function. We prove that the optimal mechanism takes the form of a ``randomized response on bins'', and propose an efficient algorithm for finding the optimal bin values. We carry out a thorough experimental evaluation on several datasets demonstrating the efficacy of our algorithm.
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In this paper, we propose and showcase, for the first time, monocular multi-view layout estimation for warehouse racks and shelves. Unlike typical layout estimation methods, MVRackLay estimates multi-layered layouts, wherein each layer corresponds to the layout of a shelf within a rack. Given a sequence of images of a warehouse scene, a dual-headed Convolutional-LSTM architecture outputs segmented racks, the front and the top view layout of each shelf within a rack. With minimal effort, such an output is transformed into a 3D rendering of all racks, shelves and objects on the shelves, giving an accurate 3D depiction of the entire warehouse scene in terms of racks, shelves and the number of objects on each shelf. MVRackLay generalizes to a diverse set of warehouse scenes with varying number of objects on each shelf, number of shelves and in the presence of other such racks in the background. Further, MVRackLay shows superior performance vis-a-vis its single view counterpart, RackLay, in layout accuracy, quantized in terms of the mean IoU and mAP metrics. We also showcase a multi-view stitching of the 3D layouts resulting in a representation of the warehouse scene with respect to a global reference frame akin to a rendering of the scene from a SLAM pipeline. To the best of our knowledge, this is the first such work to portray a 3D rendering of a warehouse scene in terms of its semantic components - Racks, Shelves and Objects - all from a single monocular camera.
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在软件开发过程中,开发人员需要回答有关代码语义方面的查询。即使已经用神经方法进行了广泛的自然语言研究,但尚未探索使用神经网络对代码回答语义查询的问题。这主要是因为没有现有的数据集,具有提取性问答和答案对,涉及复杂概念和较长推理的代码。我们通过构建一个名为Codequeries的新的,策划的数据集并提出了一种关于代码的神经问题方法来弥合这一差距。我们基于最先进的预训练的代码模型,以预测答案和支持事实跨度。给定查询和代码,只有一些代码可能与回答查询有关。我们首先在理想的环境下进行实验,其中仅给出了模型的相关代码,并表明我们的模型做得很好。然后,我们在三个务实的考虑因素下进行实验:(1)扩展到大尺寸的代码,(2)从有限数量的示例中学习,(3)代码中对次要语法错误的鲁棒性。我们的结果表明,虽然神经模型可以抵御代码中的次要语法错误,代码的大小增加,与查询无关的代码的存在以及减少的培训示例数量限制了模型性能。我们正在释放数据和模型,以促进未来关于回答代码语义查询的问题的工作。
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增量学习是一种范式,可以通过流数据大规模构建模型构建和更新。对于端到端的自动语音识别(ASR)任务,缺乏人类注释的标签,以及需要保留模型建设政策的隐私政策,这使其成为艰巨的挑战。受这些挑战的激励,在本文中,我们使用基于云的框架为生产系统展示了从隐私保存自动语音识别(ILASR)的增量学习中的见解。我们的意思是,通过保留隐私性,对没有人类注释的短暂数据使用。该系统是用于增量/持续学习的生产LevelAsASR模型的一步,该模型提供了接近实时测试床,以在云中进行端到端ASR实验,同时遵守保留隐私的政策。我们表明,即使在没有人类注释的标签的情况下,拟议的系统也可以在六个月的新时间内显着改善生产模型(3%),而在增量学习中,较弱的监督和大批量大小。在新时期,这种改进比测试集的新单词和短语相比为20%。我们在ASR的同时进一步探讨了拥有有效的教师模型和使用大批量大小的实用性的同时,以保护隐私的增量方式展示了模型构建的有效性。
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我们引入了一种用于隐私随机变量数值组成的新算法,可用于计算机制组成的准确差分隐私参数。我们的算法实现了$ \ mathrm {polylog}(k)$的运行时间和内存使用量,用于从广泛的机制($ k $ times)中进行自我组合的任务;该类别包括在分析差异私有随机梯度下降中出现的亚采样高斯机制。相比之下,Gopi等人的最新工作。(Neurips 2021)在同一任务中获得了$ \ widetilde {o}(\ sqrt {k})$的运行时间。我们的方法扩展到在同一类中撰写$ k $不同机制的情况,从$ \ wideTilde {o}(k^{1.5})$改善其运行时间和内存使用量到$ \ widetilde {o}(k)$。
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隐私损失分配(PLD)在差异隐私(DP)的背景下对机制的隐私损失进行了严格的特征。最近的工作表明,与其他已知方法相比,基于PLD的会计允许更紧密的$(\ Varepsilon,\ delta)$ - DP保证。基于PLD的会计中的一个关键问题是如何在任何指定的离散支持上近似任何(潜在的连续)PLD。我们提出了解决这个问题的新方法。我们的方法都支持悲观的估计,它高估了曲棍球刺激的差异(即$ \ delta $)的任何值的$ \ varepsilon $和乐观的估计,从而低估了曲棍球粘贴的分歧。此外,我们表明,在所有悲观估计中,我们的悲观估计是最好的。实验评估表明,与以前的方法相比,我们的方法可以在更大的离散时间间隔内工作,同时保持相似的误差,但比现有方法更近似。
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