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Generating photo-realistic images from a text description is a challenging problem in computer vision. Previous works have shown promising performance to generate synthetic images conditional on text by Generative Adversarial Networks…

计算机视觉与模式识别 · 计算机科学 2021-07-29 Tao Hu , Chengjiang Long , Chunxia Xiao

Problems in differentiable rendering often involve optimizing scene parameters that cause motion in image space. The gradients for such parameters tend to be sparse, leading to poor convergence. While existing methods address this sparsity…

图形学 · 计算机科学 2025-03-31 Ishit Mehta , Manmohan Chandraker , Ravi Ramamoorthi

Fine-tuning Stable Diffusion enables subject-driven image synthesis by adapting the model to generate images containing specific subjects. However, existing fine-tuning methods suffer from two key issues: underfitting, where the model fails…

图形学 · 计算机科学 2025-06-10 Yao Ni , Song Wen , Piotr Koniusz , Anoop Cherian

Acquiring images of the same anatomy with multiple different contrasts increases the diversity of diagnostic information available in an MR exam. Yet, scan time limitations may prohibit acquisition of certain contrasts, and images for some…

计算机视觉与模式识别 · 计算机科学 2018-02-06 Salman Ul Hassan Dar , Mahmut Yurt , Levent Karacan , Aykut Erdem , Erkut Erdem , Tolga Çukur

Blind Super-Resolution (SR) usually involves two sub-problems: 1) estimating the degradation of the given low-resolution (LR) image; 2) super-resolving the LR image to its high-resolution (HR) counterpart. Both problems are ill-posed due to…

计算机视觉与模式识别 · 计算机科学 2023-08-21 Zhengxiong Luo , Yan Huang , Shang Li , Liang Wang , Tieniu Tan

Fine-grained text to image synthesis involves generating images from texts that belong to different categories. In contrast to general text to image synthesis, in fine-grained synthesis there is high similarity between images of different…

计算机视觉与模式识别 · 计算机科学 2024-12-17 Xu Ouyang , Ying Chen , Kaiyue Zhu , Gady Agam

A low-light image enhancement is a highly demanded image processing technique, especially for consumer digital cameras and cameras on mobile phones. In this paper, a gradient-based low-light image enhancement algorithm is proposed. The key…

计算机视觉与模式识别 · 计算机科学 2018-09-26 Masayuki Tanaka , Takashi Shibata , Masatoshi Okutomi

A resolution enhancement technique for optical coherence tomography (OCT), based on Generative Adversarial Networks (GANs), was developed and investigated. GANs have been previously used for resolution enhancement of photography and optical…

图像与视频处理 · 电气工程与系统科学 2021-01-19 Kaicheng Liang , Xinyu Liu , Si Chen , Jun Xie , Wei Qing Lee , Linbo Liu , Hwee Kuan Lee

Inferring the structure of 3D scenes from 2D observations is a fundamental challenge in computer vision. Recently popularized approaches based on neural scene representations have achieved tremendous impact and have been applied across a…

计算机视觉与模式识别 · 计算机科学 2023-03-27 Mehdi S. M. Sajjadi , Aravindh Mahendran , Thomas Kipf , Etienne Pot , Daniel Duckworth , Mario Lucic , Klaus Greff

Image harmonization aims to adjust the foreground illumination in a composite image to make it harmonious. The existing harmonization methods can only produce one deterministic result for a composite image, ignoring that a composite image…

计算机视觉与模式识别 · 计算机科学 2024-07-23 Xinhao Tao , Tianyuan Qiu , Junyan Cao , Li Niu

Camera anomalies like rain or dust can severelydegrade image quality and its related tasks, such as localizationand segmentation. In this work we address this importantissue by implementing a pre-processing step that can effectivelymitigate…

计算机视觉与模式识别 · 计算机科学 2021-09-07 Gianmario Fumagalli , Yannick Huber , Marcin Dymczyk , Roland Siegwart , Renaud Dubé

Ghost imaging (GI) is an imaging technique that uses the second-order correlation between two light beams to obtain the image of an object. However, standard GI is affected by optical background noise, which reduces its practical use. We…

图像与视频处理 · 电气工程与系统科学 2020-01-13 Zhe Yang , Wei-Xing Zhang , Ma-Chi Zhang , Dong Ruan , Jun-Lin Li

This paper is on image and face super-resolution. The vast majority of prior work for this problem focus on how to increase the resolution of low-resolution images which are artificially generated by simple bilinear down-sampling (or in a…

计算机视觉与模式识别 · 计算机科学 2018-07-31 Adrian Bulat , Jing Yang , Georgios Tzimiropoulos

Low-light images, i.e. the images captured in low-light conditions, suffer from very poor visibility caused by low contrast, color distortion and significant measurement noise. Low-light image enhancement is about improving the visibility…

图像与视频处理 · 电气工程与系统科学 2020-07-08 Jinxiu Liang , Yong Xu , Yuhui Quan , Jingwen Wang , Haibin Ling , Hui Ji

In image editing, the most common task is pasting objects from one image to the other and then eventually adjusting the manifestation of the foreground object with the background object. This task is called image compositing. But image…

计算机视觉与模式识别 · 计算机科学 2021-03-30 Shivangi Aneja , Soham Mazumder

In the last few years, we have witnessed the rise of a series of deep learning methods to generate synthetic images that look extremely realistic. These techniques prove useful in the movie industry and for artistic purposes. However, they…

计算机视觉与模式识别 · 计算机科学 2022-03-07 Sara Mandelli , Nicolò Bonettini , Paolo Bestagini , Stefano Tubaro

Although optical aperture synthesis has been generally regarded as the only access to very large imager for over a century, the problem of phasing all the giant sub-apertures on the scale of wavelength is still prohibitive. Besides, the…

光学 · 物理学 2023-08-31 Shuai Sun , Zhen-Wu Nie , Yue-Gang Li , Hui-Zu Lin , Wei-Tao Liu , Ping-Xing Chen

Synthesizing novel views for urban environments is crucial for tasks like autonomous driving and virtual tours. Compared to object-level or indoor situations, outdoor settings present unique challenges, such as inconsistency across frames…

计算机视觉与模式识别 · 计算机科学 2023-11-30 Mreenav Shyam Deka , Lu Sang , Daniel Cremers

Training medical AI algorithms requires large volumes of accurately labeled datasets, which are difficult to obtain in the real world. Synthetic images generated from deep generative models can help alleviate the data scarcity problem, but…

图像与视频处理 · 电气工程与系统科学 2023-06-16 Xiaodan Xing , Yang Nan , Federico Felder , Simon Walsh , Guang Yang

All existing image enhancement methods, such as HDR tone mapping, cannot recover A/D quantization losses due to insufficient or excessive lighting, (underflow and overflow problems). The loss of image details due to A/D quantization is…

计算机视觉与模式识别 · 计算机科学 2018-03-22 Chang Liu , Xiaolin Wu , Xiao Shu