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Welcome to ShortScience.org! |
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- ShortScience.org is a platform for post-publication discussion aiming to improve accessibility and reproducibility of research ideas.
- The website has 1583 public summaries, mostly in machine learning, written by the community and organized by paper, conference, and year.
- Reading summaries of papers is useful to obtain the perspective and insight of another reader, why they liked or disliked it, and their attempt to demystify complicated sections.
- Also, writing summaries is a good exercise to understand the content of a paper because you are forced to challenge your assumptions when explaining it.
- Finally, you can keep up to date with the flood of research by reading the latest summaries on our Twitter and Facebook pages.
Object-Centric Learning with Slot Attention
Francesco Locatello and Dirk Weissenborn and Thomas Unterthiner and Aravindh Mahendran and Georg Heigold and Jakob Uszkoreit and Alexey Dosovitskiy and Thomas Kipf
arXiv e-Print archive - 2020 via Local arXiv
Keywords: cs.LG, cs.CV, stat.ML
First published: 2023/06/10 (just now)
Abstract: Learning object-centric representations of complex scenes is a promising step towards enabling efficient abstract reasoning from low-level perceptual features. Yet, most deep learning approaches learn distributed representations that do not capture the compositional properties of natural scenes. In this paper, we present the Slot Attention module, an architectural component that interfaces with perceptual representations such as the output of a convolutional neural network and produces a set of task-dependent abstract representations which we call slots. These slots are exchangeable and can bind to any object in the input by specializing through a competitive procedure over multiple rounds of attention. We empirically demonstrate that Slot Attention can extract object-centric representations that enable generalization to unseen compositions when trained on unsupervised object discovery and supervised property prediction tasks.
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Francesco Locatello and Dirk Weissenborn and Thomas Unterthiner and Aravindh Mahendran and Georg Heigold and Jakob Uszkoreit and Alexey Dosovitskiy and Thomas Kipf
arXiv e-Print archive - 2020 via Local arXiv
Keywords: cs.LG, cs.CV, stat.ML
First published: 2023/06/10 (just now)
Abstract: Learning object-centric representations of complex scenes is a promising step towards enabling efficient abstract reasoning from low-level perceptual features. Yet, most deep learning approaches learn distributed representations that do not capture the compositional properties of natural scenes. In this paper, we present the Slot Attention module, an architectural component that interfaces with perceptual representations such as the output of a convolutional neural network and produces a set of task-dependent abstract representations which we call slots. These slots are exchangeable and can bind to any object in the input by specializing through a competitive procedure over multiple rounds of attention. We empirically demonstrate that Slot Attention can extract object-centric representations that enable generalization to unseen compositions when trained on unsupervised object discovery and supervised property prediction tasks.
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The Slot Attention module maps from a set of N input feature vectors to a set of K output vectors that we refer to as slots. Each vector in this output set can, for example, describe an object or an entity in the input. https://i.imgur.com/81nh508.png  |
CLASTER: Clustering with Reinforcement Learning for Zero-Shot Action Recognition
Shreyank N Gowda and Laura Sevilla-Lara and Frank Keller and Marcus Rohrbach
arXiv e-Print archive - 2021 via Local arXiv
Keywords: cs.CV
First published: 2023/06/10 (just now)
Abstract: Zero-shot action recognition is the task of recognizingaction classes without visual examples, only with a seman-tic embedding which relates unseen to seen classes. Theproblem can be seen as learning a function which general-izes well to instances of unseen classes without losing dis-crimination between classes. Neural networks can modelthe complex boundaries between visual classes, which ex-plains their success as supervised models. However, inzero-shot learning, these highly specialized class bound-aries may not transfer well from seen to unseen classes.In this paper we propose a centroid-based representation,which clusters visual and semantic representation, consid-ers all training samples at once, and in this way generaliz-ing well to instances from unseen classes. We optimize theclustering using Reinforcement Learning which we show iscritical for our approach to work. We call the proposedmethod CLASTER and observe that it consistently outper-forms the state-of-the-art in all standard datasets, includ-ing UCF101, HMDB51 and Olympic Sports; both in thestandard zero-shot evaluation and the generalized zero-shotlearning. Further, we show that our model performs com-petitively in the image domain as well, outperforming thestate-of-the-art in many settings.
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Shreyank N Gowda and Laura Sevilla-Lara and Frank Keller and Marcus Rohrbach
arXiv e-Print archive - 2021 via Local arXiv
Keywords: cs.CV
First published: 2023/06/10 (just now)
Abstract: Zero-shot action recognition is the task of recognizingaction classes without visual examples, only with a seman-tic embedding which relates unseen to seen classes. Theproblem can be seen as learning a function which general-izes well to instances of unseen classes without losing dis-crimination between classes. Neural networks can modelthe complex boundaries between visual classes, which ex-plains their success as supervised models. However, inzero-shot learning, these highly specialized class bound-aries may not transfer well from seen to unseen classes.In this paper we propose a centroid-based representation,which clusters visual and semantic representation, consid-ers all training samples at once, and in this way generaliz-ing well to instances from unseen classes. We optimize theclustering using Reinforcement Learning which we show iscritical for our approach to work. We call the proposedmethod CLASTER and observe that it consistently outper-forms the state-of-the-art in all standard datasets, includ-ing UCF101, HMDB51 and Olympic Sports; both in thestandard zero-shot evaluation and the generalized zero-shotlearning. Further, we show that our model performs com-petitively in the image domain as well, outperforming thestate-of-the-art in many settings.
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This paper aims to do zero-shot action recognition which uses cluster-based representation. Concretely, it uses REINFORCE algorithm which is a Reinforcement Learning algorithm to optimize the centroids and the reward signal is the classification scores. https://i.imgur.com/gWyJLX0.png |
Language Is Not All You Need: Aligning Perception with Language Models
Shaohan Huang and Li Dong and Wenhui Wang and Yaru Hao and Saksham Singhal and Shuming Ma and Tengchao Lv and Lei Cui and Owais Khan Mohammed and Qiang Liu and Kriti Aggarwal and Zewen Chi and Johan Bjorck and Vishrav Chaudhary and Subhojit Som and Xia Song and Furu Wei
arXiv e-Print archive - 2023 via Local arXiv
Keywords: cs.CL, cs.CV
First published: 2023/06/10 (just now)
Abstract: A big convergence of language, multimodal perception, action, and world modeling is a key step toward artificial general intelligence. In this work, we introduce Kosmos-1, a Multimodal Large Language Model (MLLM) that can perceive general modalities, learn in context (i.e., few-shot), and follow instructions (i.e., zero-shot). Specifically, we train Kosmos-1 from scratch on web-scale multimodal corpora, including arbitrarily interleaved text and images, image-caption pairs, and text data. We evaluate various settings, including zero-shot, few-shot, and multimodal chain-of-thought prompting, on a wide range of tasks without any gradient updates or finetuning. Experimental results show that Kosmos-1 achieves impressive performance on (i) language understanding, generation, and even OCR-free NLP (directly fed with document images), (ii) perception-language tasks, including multimodal dialogue, image captioning, visual question answering, and (iii) vision tasks, such as image recognition with descriptions (specifying classification via text instructions). We also show that MLLMs can benefit from cross-modal transfer, i.e., transfer knowledge from language to multimodal, and from multimodal to language. In addition, we introduce a dataset of Raven IQ test, which diagnoses the nonverbal reasoning capability of MLLMs.
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Shaohan Huang and Li Dong and Wenhui Wang and Yaru Hao and Saksham Singhal and Shuming Ma and Tengchao Lv and Lei Cui and Owais Khan Mohammed and Qiang Liu and Kriti Aggarwal and Zewen Chi and Johan Bjorck and Vishrav Chaudhary and Subhojit Som and Xia Song and Furu Wei
arXiv e-Print archive - 2023 via Local arXiv
Keywords: cs.CL, cs.CV
First published: 2023/06/10 (just now)
Abstract: A big convergence of language, multimodal perception, action, and world modeling is a key step toward artificial general intelligence. In this work, we introduce Kosmos-1, a Multimodal Large Language Model (MLLM) that can perceive general modalities, learn in context (i.e., few-shot), and follow instructions (i.e., zero-shot). Specifically, we train Kosmos-1 from scratch on web-scale multimodal corpora, including arbitrarily interleaved text and images, image-caption pairs, and text data. We evaluate various settings, including zero-shot, few-shot, and multimodal chain-of-thought prompting, on a wide range of tasks without any gradient updates or finetuning. Experimental results show that Kosmos-1 achieves impressive performance on (i) language understanding, generation, and even OCR-free NLP (directly fed with document images), (ii) perception-language tasks, including multimodal dialogue, image captioning, visual question answering, and (iii) vision tasks, such as image recognition with descriptions (specifying classification via text instructions). We also show that MLLMs can benefit from cross-modal transfer, i.e., transfer knowledge from language to multimodal, and from multimodal to language. In addition, we introduce a dataset of Raven IQ test, which diagnoses the nonverbal reasoning capability of MLLMs.
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This paper is about Multimodal Large Language Model (MLLM). In this paper, they proposed an MLLM model called KOSMOS-1 that can do instruction following, VQA, IQ-testing, visual dialog, etc. https://i.imgur.com/9P3Vuse.png https://i.imgur.com/HcYtbdD.png The input of this model is image-caption pairs and interleaved data of images and texts. https://i.imgur.com/LL4HiM3.png The input data will be fed into an embedding module to encode the data into vectors, then the vectors will be fed into a Transformer Decoder. Then the decoder will predict the next token based on the previous context. I think this large model's downside is that it can only predict phrases, not images. |
Women also Snowboard: Overcoming Bias in Captioning Models (Extended Abstract)
Lisa Anne Hendricks and Kaylee Burns and Kate Saenko and Trevor Darrell and Anna Rohrbach
arXiv e-Print archive - 2018 via Local arXiv
Keywords: cs.CV
First published: 2023/06/10 (just now)
Abstract: Most machine learning methods are known to capture and exploit biases of the training data. While some biases are beneficial for learning, others are harmful. Specifically, image captioning models tend to exaggerate biases present in training data. This can lead to incorrect captions in domains where unbiased captions are desired, or required, due to over reliance on the learned prior and image context. We investigate generation of gender specific caption words (e.g. man, woman) based on the person's appearance or the image context. We introduce a new Equalizer model that ensures equal gender probability when gender evidence is occluded in a scene and confident predictions when gender evidence is present. The resulting model is forced to look at a person rather than use contextual cues to make a gender specific prediction. The losses that comprise our model, the Appearance Confusion Loss and the Confident Loss, are general, and can be added to any description model in order to mitigate impacts of unwanted bias in a description dataset. Our proposed model has lower error than prior work when describing images with people and mentioning their gender and more closely matches the ground truth ratio of sentences including women to sentences including men.
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Lisa Anne Hendricks and Kaylee Burns and Kate Saenko and Trevor Darrell and Anna Rohrbach
arXiv e-Print archive - 2018 via Local arXiv
Keywords: cs.CV
First published: 2023/06/10 (just now)
Abstract: Most machine learning methods are known to capture and exploit biases of the training data. While some biases are beneficial for learning, others are harmful. Specifically, image captioning models tend to exaggerate biases present in training data. This can lead to incorrect captions in domains where unbiased captions are desired, or required, due to over reliance on the learned prior and image context. We investigate generation of gender specific caption words (e.g. man, woman) based on the person's appearance or the image context. We introduce a new Equalizer model that ensures equal gender probability when gender evidence is occluded in a scene and confident predictions when gender evidence is present. The resulting model is forced to look at a person rather than use contextual cues to make a gender specific prediction. The losses that comprise our model, the Appearance Confusion Loss and the Confident Loss, are general, and can be added to any description model in order to mitigate impacts of unwanted bias in a description dataset. Our proposed model has lower error than prior work when describing images with people and mentioning their gender and more closely matches the ground truth ratio of sentences including women to sentences including men.
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This paper is to reduce gender bias in the captioning model. Concretely, traditional captioning models tend to rely on contextual cues, so they usually predict incorrect captions for an image that contains people.
To reduce gender bias, they introduced a new $Equalizer$ model that contains two losses:
(1) Appearance Confusion Loss: When it is hard to tell if there is a man or a woman in the image, the model should provide a fair probability of predicting a man or a woman.
To define that loss, first, they define a confusion function, which indicates how likely a next predicted word belongs to a set of woman words or a set of man words.
https://i.imgur.com/oI6xswy.png
Where, $w~_{t}$ is the next predicted word, $G_{w}$ is the set of woman words, $G_{m}$ is the set of man words.
And the Loss is defined as the normal cross-entropy loss multiplied by the Confusion function.
https://i.imgur.com/kLpROse.png
(2) Confident Loss: When it is easy to recognize a man or a woman in an image, this loss encourages the model to predict gender words correctly.
In this loss, they also defined in-confidence functions, there are two in-confidence functions, the first one is the in-confidence function for man words, and the second one is for woman words. These two functions are the same.
https://i.imgur.com/4stFjac.png
This function tells that if the model is confident when predicting a gender (ex. woman), then the value of the in-confidence function for woman words should be low.
Then, the confidence loss function is as follows:
https://i.imgur.com/1pRgDir.png
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FALCON: Fast Visual Concept Learning by Integrating Images, Linguistic descriptions, and Conceptual Relations
Lingjie Mei and Jiayuan Mao and Ziqi Wang and Chuang Gan and Joshua B. Tenenbaum
arXiv e-Print archive - 2022 via Local arXiv
Keywords: cs.CV, cs.AI, cs.CL, cs.LG
First published: 2023/06/10 (just now)
Abstract: We present a meta-learning framework for learning new visual concepts quickly, from just one or a few examples, guided by multiple naturally occurring data streams: simultaneously looking at images, reading sentences that describe the objects in the scene, and interpreting supplemental sentences that relate the novel concept with other concepts. The learned concepts support downstream applications, such as answering questions by reasoning about unseen images. Our model, namely FALCON, represents individual visual concepts, such as colors and shapes, as axis-aligned boxes in a high-dimensional space (the "box embedding space"). Given an input image and its paired sentence, our model first resolves the referential expression in the sentence and associates the novel concept with particular objects in the scene. Next, our model interprets supplemental sentences to relate the novel concept with other known concepts, such as "X has property Y" or "X is a kind of Y". Finally, it infers an optimal box embedding for the novel concept that jointly 1) maximizes the likelihood of the observed instances in the image, and 2) satisfies the relationships between the novel concepts and the known ones. We demonstrate the effectiveness of our model on both synthetic and real-world datasets.
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Lingjie Mei and Jiayuan Mao and Ziqi Wang and Chuang Gan and Joshua B. Tenenbaum
arXiv e-Print archive - 2022 via Local arXiv
Keywords: cs.CV, cs.AI, cs.CL, cs.LG
First published: 2023/06/10 (just now)
Abstract: We present a meta-learning framework for learning new visual concepts quickly, from just one or a few examples, guided by multiple naturally occurring data streams: simultaneously looking at images, reading sentences that describe the objects in the scene, and interpreting supplemental sentences that relate the novel concept with other concepts. The learned concepts support downstream applications, such as answering questions by reasoning about unseen images. Our model, namely FALCON, represents individual visual concepts, such as colors and shapes, as axis-aligned boxes in a high-dimensional space (the "box embedding space"). Given an input image and its paired sentence, our model first resolves the referential expression in the sentence and associates the novel concept with particular objects in the scene. Next, our model interprets supplemental sentences to relate the novel concept with other known concepts, such as "X has property Y" or "X is a kind of Y". Finally, it infers an optimal box embedding for the novel concept that jointly 1) maximizes the likelihood of the observed instances in the image, and 2) satisfies the relationships between the novel concepts and the known ones. We demonstrate the effectiveness of our model on both synthetic and real-world datasets.
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This paper proposed a method to locate an object based on an image and a sentence describing objects in the image. Then, predicting a new visual concept embedding based on two graphs (1) a graph that describes the relationship between objects in a supplemental sentence describing several objects, and (2) a graph that describes the relationship between the detected object in the image and example images related to objects in the supplementary sentence. This embedding can be used for many downstream tasks such as Visual entailment, Visual Reasoning.
For example, in the domain 1 image, the new visual concept is red, and the model can locate where is the red cub in the image (1a). Then, in (1b) the model can interpret the supplemental sentences that relate the novel concept with other concepts.
https://i.imgur.com/yBIteYT.png
To locate the box that describes the object, this work utilized MaskRCNN to first detect the object in the scene, then used a Neuro-Symbolic Program to match the object mentioned in the input sentence with the detected objects by MaskRCNN.
https://i.imgur.com/2cG9IUX.png
To learn the concept embedding for that object, this work needs a supplemental sentence that describes several objects, they are known concepts except one is a novel concept. Then, building two graphs $GNN_{concept}$, and $GNN_{example}$.
In $GNN_{concept}$, this is a graph representing the relationship between known concepts and the novel concept.
For example in this graph, "White-eyed Vireo" is a new concept.
https://i.imgur.com/1LjirJz.png
In $GNN_{example}$, this is a graph representing the relationship between the detected object that represents the novel object and example images of the novel object.
https://i.imgur.com/SdR74Vu.png
Then learn the concept embedding for this novel concept.
https://i.imgur.com/YGYEPvc.png
https://i.imgur.com/VXOBn6n.png
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