Adam, Hartwig
$\epsilon$-VAE: Denoising as Visual Decoding
Zhao, Long, Woo, Sanghyun, Wan, Ziyu, Li, Yandong, Zhang, Han, Gong, Boqing, Adam, Hartwig, Jia, Xuhui, Liu, Ting
In generative modeling, tokenization simplifies complex data into compact, structured representations, creating a more efficient, learnable space. For highdimensional visual data, it reduces redundancy and emphasizes key features for high-quality generation. Current visual tokenization methods rely on a traditional autoencoder framework, where the encoder compresses data into latent representations, and the decoder reconstructs the original input. In this work, we offer a new perspective by proposing denoising as decoding, shifting from single-step reconstruction to iterative refinement. Specifically, we replace the decoder with a diffusion process that iteratively refines noise to recover the original image, guided by the latents provided by the encoder. We evaluate our approach by assessing both reconstruction (rFID) and generation quality (FID), comparing it to state-of-theart autoencoding approach. We hope this work offers new insights into integrating iterative generation and autoencoding for improved compression and generation. Generative modeling aims to capture the underlying distribution of training data, enabling realistic sample generation during inference. A key preprocessing step is tokenization, which converts raw data into discrete tokens or continuous latent representations. These compact representations allow models to efficiently learn complex patterns, enhancing the quality of generated outputs.
VideoPrism: A Foundational Visual Encoder for Video Understanding
Zhao, Long, Gundavarapu, Nitesh B., Yuan, Liangzhe, Zhou, Hao, Yan, Shen, Sun, Jennifer J., Friedman, Luke, Qian, Rui, Weyand, Tobias, Zhao, Yue, Hornung, Rachel, Schroff, Florian, Yang, Ming-Hsuan, Ross, David A., Wang, Huisheng, Adam, Hartwig, Sirotenko, Mikhail, Liu, Ting, Gong, Boqing
We introduce VideoPrism, a general-purpose video encoder that tackles diverse video understanding tasks with a single frozen model. We pretrain VideoPrism on a heterogeneous corpus containing 36M high-quality video-caption pairs and 582M video clips with noisy parallel text (e.g., ASR transcripts). The pretraining approach improves upon masked autoencoding by global-local distillation of semantic video embeddings and a token shuffling scheme, enabling VideoPrism to focus primarily on the video modality while leveraging the invaluable text associated with videos. We extensively test VideoPrism on four broad groups of video understanding tasks, from web video question answering to CV for science, achieving state-of-the-art performance on 31 out of 33 video understanding benchmarks.
VideoPoet: A Large Language Model for Zero-Shot Video Generation
Kondratyuk, Dan, Yu, Lijun, Gu, Xiuye, Lezama, Josรฉ, Huang, Jonathan, Hornung, Rachel, Adam, Hartwig, Akbari, Hassan, Alon, Yair, Birodkar, Vighnesh, Cheng, Yong, Chiu, Ming-Chang, Dillon, Josh, Essa, Irfan, Gupta, Agrim, Hahn, Meera, Hauth, Anja, Hendon, David, Martinez, Alonso, Minnen, David, Ross, David, Schindler, Grant, Sirotenko, Mikhail, Sohn, Kihyuk, Somandepalli, Krishna, Wang, Huisheng, Yan, Jimmy, Yang, Ming-Hsuan, Yang, Xuan, Seybold, Bryan, Jiang, Lu
We present VideoPoet, a language model capable of synthesizing high-quality video, with matching audio, from a large variety of conditioning signals. VideoPoet employs a decoder-only transformer architecture that processes multimodal inputs -- including images, videos, text, and audio. The training protocol follows that of Large Language Models (LLMs), consisting of two stages: pretraining and task-specific adaptation. During pretraining, VideoPoet incorporates a mixture of multimodal generative objectives within an autoregressive Transformer framework. The pretrained LLM serves as a foundation that can be adapted for a range of video generation tasks. We present empirical results demonstrating the model's state-of-the-art capabilities in zero-shot video generation, specifically highlighting VideoPoet's ability to generate high-fidelity motions. Project page: http://sites.research.google/videopoet/
Alternating Gradient Descent and Mixture-of-Experts for Integrated Multimodal Perception
Akbari, Hassan, Kondratyuk, Dan, Cui, Yin, Hornung, Rachel, Wang, Huisheng, Adam, Hartwig
We present Integrated Multimodal Perception (IMP), a simple and scalable multimodal multi-task training and modeling approach. IMP integrates multimodal inputs including image, video, text, and audio into a single Transformer encoder with minimal modality-specific components. IMP makes use of a novel design that combines Alternating Gradient Descent (AGD) and Mixture-of-Experts (MoE) for efficient model and task scaling. We conduct extensive empirical studies and reveal the following key insights: 1) Performing gradient descent updates by alternating on diverse modalities, loss functions, and tasks, with varying input resolutions, efficiently improves the model. 2) Sparsification with MoE on a single modality-agnostic encoder substantially improves the performance, outperforming dense models that use modality-specific encoders or additional fusion layers and greatly mitigates the conflicts between modalities. IMP achieves competitive performance on a wide range of downstream tasks including video classification, image classification, image-text, and video-text retrieval. Most notably, we train a sparse IMP-MoE-L variant focusing on video tasks that achieves new state-of-the-art in zero-shot video classification: 77.0% on Kinetics-400, 76.8% on Kinetics-600, and 68.3% on Kinetics-700, improving the previous state-of-the-art by +5%, +6.7%, and +5.8%, respectively, while using only 15% of their total training computational cost.
Exploring Fine-Grained Audiovisual Categorization with the SSW60 Dataset
Van Horn, Grant, Qian, Rui, Wilber, Kimberly, Adam, Hartwig, Mac Aodha, Oisin, Belongie, Serge
We present a new benchmark dataset, Sapsucker Woods 60 (SSW60), for advancing research on audiovisual fine-grained categorization. While our community has made great strides in fine-grained visual categorization on images, the counterparts in audio and video fine-grained categorization are relatively unexplored. To encourage advancements in this space, we have carefully constructed the SSW60 dataset to enable researchers to experiment with classifying the same set of categories in three different modalities: images, audio, and video. The dataset covers 60 species of birds and is comprised of images from existing datasets, and brand new, expert-curated audio and video datasets. We thoroughly benchmark audiovisual classification performance and modality fusion experiments through the use of state-of-the-art transformer methods. Our findings show that performance of audiovisual fusion methods is better than using exclusively image or audio based methods for the task of video classification. We also present interesting modality transfer experiments, enabled by the unique construction of SSW60 to encompass three different modalities. We hope the SSW60 dataset and accompanying baselines spur research in this fascinating area.
Panoptic-DeepLab
Cheng, Bowen, Collins, Maxwell D., Zhu, Yukun, Liu, Ting, Huang, Thomas S., Adam, Hartwig, Chen, Liang-Chieh
Our Panoptic-DeepLab is conceptually simple and delivers state-of-the-art results. In particular, we adopt the dual-ASPP and dual-decoder structures specific to semantic, and instance segmentation, respectively. The semantic segmentation branch is the same as the typical design of any semantic segmentation model ( e.g., DeepLab), while the instance segmentation branch is class-agnostic, involving a simple instance center regression. Our single Panoptic-DeepLab sets the new state-of-art at all three Cityscapes benchmarks, reaching 84.2% mIoU, 39.0% AP, and 65.5% PQ on test set, and advances results on the other challenging Mapillary Vistas. 1. Introduction Our bottom-up Panoptic-DeepLab is conceptually simple and delivers state-of-the-art panoptic segmentation results [7]. We adopt dual-ASPP and dual-decoder modules, specific to semantic segmentation and instance segmentation, respectively. The semantic segmentation branch follows the typical design of any semantic segmentation model (e.g., DeepLab [2]), while the instance segmentation prediction involves a simple instance center regression [1, 5], where the model learns to predict instance centers as well as the offset from each pixel to its corresponding center.
Searching for Efficient Multi-Scale Architectures for Dense Image Prediction
Chen, Liang-Chieh, Collins, Maxwell, Zhu, Yukun, Papandreou, George, Zoph, Barret, Schroff, Florian, Adam, Hartwig, Shlens, Jon
The design of neural network architectures is an important component for achieving state-of-the-art performance with machine learning systems across a broad array of tasks. Much work has endeavored to design and build architectures automatically through clever construction of a search space paired with simple learning algorithms. Recent progress has demonstrated that such meta-learning methods may exceed scalable human-invented architectures on image classification tasks. An open question is the degree to which such methods may generalize to new domains. In this work we explore the construction of meta-learning techniques for dense image prediction focused on the tasks of scene parsing, person-part segmentation, and semantic image segmentation. Constructing viable search spaces in this domain is challenging because of the multi-scale representation of visual information and the necessity to operate on high resolution imagery. Based on a survey of techniques in dense image prediction, we construct a recursive search space and demonstrate that even with efficient random search, we can identify architectures that outperform human-invented architectures and achieve state-of-the-art performance on three dense prediction tasks including 82.7% on Cityscapes (street scene parsing), 71.3% on PASCAL-Person-Part (person-part segmentation), and 87.9% on PASCAL VOC 2012 (semantic image segmentation). Additionally, the resulting architecture is more computationally efficient, requiring half the parameters and half the computational cost as previous state of the art systems.
Searching for Efficient Multi-Scale Architectures for Dense Image Prediction
Chen, Liang-Chieh, Collins, Maxwell, Zhu, Yukun, Papandreou, George, Zoph, Barret, Schroff, Florian, Adam, Hartwig, Shlens, Jon
The design of neural network architectures is an important component for achieving state-of-the-art performance with machine learning systems across a broad array of tasks. Much work has endeavored to design and build architectures automatically through clever construction of a search space paired with simple learning algorithms. Recent progress has demonstrated that such meta-learning methods may exceed scalable human-invented architectures on image classification tasks. An open question is the degree to which such methods may generalize to new domains. In this work we explore the construction of meta-learning techniques for dense image prediction focused on the tasks of scene parsing, person-part segmentation, and semantic image segmentation. Constructing viable search spaces in this domain is challenging because of the multi-scale representation of visual information and the necessity to operate on high resolution imagery. Based on a survey of techniques in dense image prediction, we construct a recursive search space and demonstrate that even with efficient random search, we can identify architectures that outperform human-invented architectures and achieve state-of-the-art performance on three dense prediction tasks including 82.7% on Cityscapes (street scene parsing), 71.3% on PASCAL-Person-Part (person-part segmentation), and 87.9% on PASCAL VOC 2012 (semantic image segmentation). Additionally, the resulting architecture is more computationally efficient, requiring half the parameters and half the computational cost as previous state of the art systems.
Searching for Efficient Multi-Scale Architectures for Dense Image Prediction
Chen, Liang-Chieh, Collins, Maxwell D., Zhu, Yukun, Papandreou, George, Zoph, Barret, Schroff, Florian, Adam, Hartwig, Shlens, Jonathon
The design of neural network architectures is an important component for achieving state-of-the-art performance with machine learning systems across a broad array of tasks. Much work has endeavored to design and build architectures automatically through clever construction of a search space paired with simple learning algorithms. Recent progress has demonstrated that such meta-learning methods may exceed scalable human-invented architectures on image classification tasks. An open question is the degree to which such methods may generalize to new domains. In this work we explore the construction of meta-learning techniques for dense image prediction focused on the tasks of scene parsing, person-part segmentation, and semantic image segmentation. Constructing viable search spaces in this domain is challenging because of the multi-scale representation of visual information and the necessity to operate on high resolution imagery. Based on a survey of techniques in dense image prediction, we construct a recursive search space and demonstrate that even with efficient random search, we can identify architectures that outperform human-invented architectures and achieve state-of-the-art performance on three dense prediction tasks including 82.7\% on Cityscapes (street scene parsing), 71.3\% on PASCAL-Person-Part (person-part segmentation), and 87.9\% on PASCAL VOC 2012 (semantic image segmentation). Additionally, the resulting architecture is more computationally efficient, requiring half the parameters and half the computational cost as previous state of the art systems.
InclusiveFaceNet: Improving Face Attribute Detection with Race and Gender Diversity
Ryu, Hee Jung, Adam, Hartwig, Mitchell, Margaret
We demonstrate an approach to face attribute detection that retains or improves attribute detection accuracy across gender and race subgroups by learning demographic information prior to learning the attribute detection task. The system, which we call InclusiveFaceNet, detects face attributes by transferring race and gender representations learned from a held-out dataset of public race and gender identities. Leveraging learned demographic representations while withholding demographic inference from the downstream face attribute detection task preserves potential users' demographic privacy while resulting in some of the best reported numbers to date on attribute detection in the Faces of the World and CelebA datasets.