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This paper tackles the problem of learning a finer representation than the one provided by training labels. This enables fine-grained category retrieval of images in a collection annotated with coarse labels only. Our network is learned…

Computer Vision and Pattern Recognition · Computer Science 2020-11-30 Hugo Touvron , Alexandre Sablayrolles , Matthijs Douze , Matthieu Cord , Hervé Jégou

Fine-grained classification remains a challenging task because distinguishing categories needs learning complex and local differences. Diversity in the pose, scale, and position of objects in an image makes the problem even more difficult.…

Computer Vision and Pattern Recognition · Computer Science 2021-09-03 Mahdi Darvish , Mahsa Pouramini , Hamid Bahador

We present variational generative adversarial networks, a general learning framework that combines a variational auto-encoder with a generative adversarial network, for synthesizing images in fine-grained categories, such as faces of a…

Computer Vision and Pattern Recognition · Computer Science 2018-02-06 Jianmin Bao , Dong Chen , Fang Wen , Houqiang Li , Gang Hua

The emergence of diverse generative vision models has recently enabled the synthesis of visually realistic images, underscoring the critical need for effectively detecting these generated images from real photos. Despite advances in this…

Computer Vision and Pattern Recognition · Computer Science 2024-10-10 Huangsen Cao , Yongwei Wang , Yinfeng Liu , Sixian Zheng , Kangtao Lv , Zhimeng Zhang , Bo Zhang , Xin Ding , Fei Wu

Fine-grained image classification involves identifying different subcategories of a class which possess very subtle discriminatory features. Fine-grained datasets usually provide bounding box annotations along with class labels to aid the…

Computer Vision and Pattern Recognition · Computer Science 2021-07-30 Farha Al Breiki , Muhammad Ridzuan , Rushali Grandhe

In this paper, we investigate a new framework for image classification that adaptively generates spatial representations. Our strategy is based on a sequential process that learns to explore the different regions of any image in order to…

Computer Vision and Pattern Recognition · Computer Science 2014-02-12 Gabriel Dulac-Arnold , Ludovic Denoyer , Nicolas Thome , Matthieu Cord , Patrick Gallinari

Diffusion models (DMs) have revolutionized image generation, producing high-quality images with applications spanning various fields. However, their ability to create hyper-realistic images poses significant challenges in distinguishing…

Computer Vision and Pattern Recognition · Computer Science 2024-09-10 Santosh , Li Lin , Irene Amerini , Xin Wang , Shu Hu

Artificial, CNN-generated images are now of such high quality that humans have trouble distinguishing them from real images. Several algorithmic detection methods have been proposed, but these appear to generalize poorly to data from…

Computer Vision and Pattern Recognition · Computer Science 2020-05-13 Nils Hulzebosch , Sarah Ibrahimi , Marcel Worring

We present a novel deep convolutional neural network (DCNN) system for fine-grained image classification, called a mixture of DCNNs (MixDCNN). The fine-grained image classification problem is characterised by large intra-class variations…

Computer Vision and Pattern Recognition · Computer Science 2015-12-01 ZongYuan Ge , Alex Bewley , Christopher McCool , Ben Upcroft , Peter Corke , Conrad Sanderson

Distinguishing between computer-generated (CG) and natural photographic (PG) images is of great importance to verify the authenticity and originality of digital images. However, the recent cutting-edge generation methods enable high…

Computer Vision and Pattern Recognition · Computer Science 2022-09-08 Qiang Xu , Shan Jia , Xinghao Jiang , Tanfeng Sun , Zhe Wang , Hong Yan

A deep generative model is developed for representation and analysis of images, based on a hierarchical convolutional dictionary-learning framework. Stochastic {\em unpooling} is employed to link consecutive layers in the model, yielding…

Computer Vision and Pattern Recognition · Computer Science 2015-12-25 Yunchen Pu , Xin Yuan , Andrew Stevens , Chunyuan Li , Lawrence Carin

The digital image forensics based research works in literature classifying natural and computer generated images primarily focuses on binary tasks. These tasks typically involve the classification of natural images versus computer graphics…

Computer Vision and Pattern Recognition · Computer Science 2024-11-19 Manjary P. Gangan , Anoop Kadan , Lajish V L

Generative models can create entirely new images, but they can also partially modify real images in ways that are undetectable to the human eye. In this paper, we address the challenge of automatically detecting such local manipulations.…

Computer Vision and Pattern Recognition · Computer Science 2024-12-11 Stefan Smeu , Elisabeta Oneata , Dan Oneata

GAN-generated image detection now becomes the first line of defense against the malicious uses of machine-synthesized image manipulations such as deepfakes. Although some existing detectors work well in detecting clean, known GAN samples,…

Cryptography and Security · Computer Science 2024-01-08 Chi Liu , Tianqing Zhu , Sheng Shen , Wanlei Zhou

Deep neural networks (DNNs) have shown remarkable performance improvements on vision-related tasks such as object detection or image segmentation. Despite their success, they generally lack the understanding of 3D objects which form the…

Computer Vision and Pattern Recognition · Computer Science 2020-08-03 Hiroharu Kato , Deniz Beker , Mihai Morariu , Takahiro Ando , Toru Matsuoka , Wadim Kehl , Adrien Gaidon

The task of generating natural images from 3D scenes has been a long standing goal in computer graphics. On the other hand, recent developments in deep neural networks allow for trainable models that can produce natural-looking images with…

Computer Vision and Pattern Recognition · Computer Science 2018-12-04 Hassan Abu Alhaija , Siva Karthik Mustikovela , Andreas Geiger , Carsten Rother

Text contained in an image carries high-level semantics that can be exploited to achieve richer image understanding. In particular, the mere presence of text provides strong guiding content that should be employed to tackle a diversity of…

Computer Vision and Pattern Recognition · Computer Science 2020-01-15 Andres Mafla , Sounak Dey , Ali Furkan Biten , Lluis Gomez , Dimosthenis Karatzas

Image forgery is a topic that has been studied for many years. Before the breakthrough of deep learning, forged images were detected using handcrafted features that did not require training. These traditional methods failed to perform…

Computer Vision and Pattern Recognition · Computer Science 2024-04-29 Eren Tahir , Mert Bal

Over the past years, deep generative models have achieved a new level of performance. Generated data has become difficult, if not impossible, to be distinguished from real data. While there are plenty of use cases that benefit from this…

Cryptography and Security · Computer Science 2022-03-21 Ning Yu , Vladislav Skripniuk , Dingfan Chen , Larry Davis , Mario Fritz

The goal of fine-grained image description generation techniques is to learn detailed information from images and simulate human-like descriptions that provide coherent and comprehensive textual details about the image content. Currently,…

Computer Vision and Pattern Recognition · Computer Science 2023-11-23 Yifan Zhang , Chunzhen Lin , Donglin Cao , Dazhen Lin