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The image noise level and resolution of SPECT images are relatively poor attributed to the limited number of detected counts and various physical degradation factors during acquisitions. This study aims to apply and evaluate the use of…

图像与视频处理 · 电气工程与系统科学 2019-07-30 Qi Zhang , Jingzhang Sun , Greta S. P. Mok

Low-light image enhancement is generally regarded as a challenging task in image processing, especially for the complex visual tasks at night or weakly illuminated. In order to reduce the blurs or noises on the low-light images, a large…

计算机视觉与模式识别 · 计算机科学 2019-06-17 Yangming Shi , Xiaopo Wu , Ming Zhu

Deep learning-based methods have demonstrated encouraging results in tackling the task of panoramic image inpainting. However, it is challenging for existing methods to distinguish valid pixels from invalid pixels and find suitable…

图像与视频处理 · 电气工程与系统科学 2024-03-20 Li Yu , Yanjun Gao , Farhad Pakdaman , Moncef Gabbouj

Deep learning based generative adversarial networks (GAN) can effectively perform image reconstruction with under-sampled MR data. In general, a large number of training samples are required to improve the reconstruction performance of a…

图像与视频处理 · 电气工程与系统科学 2021-05-19 Jun Lv , Guangyuan Li , Xiangrong Tong , Weibo Chen , Jiahao Huang , Chengyan Wang , Guang Yang

One of the major challenges in design and developing of PET, scanners are the presence of inactive areas between the detector blocks which degrade the image spatial resolution and leads to streaking artifacts especially when we employ…

医学物理 · 物理学 2019-06-19 Isaac Shiri , Peyman Sheikhzadeh , Mohammad Reza Ay

Image inpainting is the task of filling in missing or masked region of an image with semantically meaningful contents. Recent methods have shown significant improvement in dealing with large-scale missing regions. However, these methods…

计算机视觉与模式识别 · 计算机科学 2023-04-25 Wanglong Lu , Xianta Jiang , Xiaogang Jin , Yong-Liang Yang , Minglun Gong , Tao Wang , Kaijie Shi , Hanli Zhao

The field of steganography has long been focused on developing methods to securely embed information within various digital media while ensuring imperceptibility and robustness. However, the growing sophistication of detection tools and the…

密码学与安全 · 计算机科学 2024-12-03 Waheed Rehman

Purpose: 4D MRI with high spatiotemporal resolution is desired for image-guided liver radiotherapy. Acquiring densely sampling k-space data is time-consuming. Accelerated acquisition with sparse samples is desirable but often causes…

图像与视频处理 · 电气工程与系统科学 2024-05-22 Di Xu , Xin Miao , Hengjie Liu , Jessica E. Scholey , Wensha Yang , Mary Feng , Michael Ohliger , Hui Lin , Yi Lao , Yang Yang , Ke Sheng

Generating images via the generative adversarial network (GAN) has attracted much attention recently. However, most of the existing GAN-based methods can only produce low-resolution images of limited quality. Directly generating…

计算机视觉与模式识别 · 计算机科学 2019-04-01 Yong Guo , Qi Chen , Jian Chen , Qingyao Wu , Qinfeng Shi , Mingkui Tan

Reconstructing an image from its Radon transform is a fundamental computed tomography (CT) task arising in applications such as X-ray scans. In many practical scenarios, a full 180-degree scan is not feasible, or there is a desire to reduce…

计算机视觉与模式识别 · 计算机科学 2025-02-20 Ilmari Vahteristo , Zhi-Song Liu , Andreas Rupp

Image super-resolution is one of the important computer vision techniques aiming to reconstruct high-resolution images from corresponding low-resolution ones. Most recently, deep learning-based approaches have been demonstrated for image…

图像与视频处理 · 电气工程与系统科学 2020-04-29 Jie Cai , Zibo Meng , Chiu Man Ho

Computed tomography (CT) has been developed as a non-destructive technique for observing minute internal images of samples. It has been difficult to obtain photo-realistic (clean or clear) CT images due to various unwanted artifacts…

量子物理 · 物理学 2023-09-12 Kyungtaek Jun

Generative Adversarial Networks (GANs) are powerful tools for reconstructing Compressed Sensing Magnetic Resonance Imaging (CS-MRI). However most recent works lack exploration of structure information of MRI images that is crucial for…

计算机视觉与模式识别 · 计算机科学 2019-03-06 Zhongnian Li , Tao Zhang , Peng Wan , Daoqiang Zhang

Noise and artifacts are intrinsic to low dose CT (LDCT) data acquisition, and will significantly affect the imaging performance. Perfect noise removal and image restoration is intractable in the context of LDCT due to the statistical and…

医学物理 · 物理学 2019-07-24 Wenchao Du , Hu Chen , Peixi Liao , Hongyu Yang , Ge Wang , Yi Zhang

A conventional approach to computed tomography (CT) or cone beam CT (CBCT) metal artifact reduction is to replace the X-ray projection data within the metal trace with synthesized data. However, existing projection or sinogram completion…

图像与视频处理 · 电气工程与系统科学 2022-03-24 Haofu Liao , Wei-An Lin , Zhimin Huo , Levon Vogelsang , William J. Sehnert , S. Kevin Zhou , Jiebo Luo

In recent years, the use of deep learning is becoming increasingly popular in computer vision. However, the effective training of deep architectures usually relies on huge sets of annotated data. This is critical in the medical field where…

图像与视频处理 · 电气工程与系统科学 2019-07-30 Paolo Andreini , Simone Bonechi , Monica Bianchini , Alessandro Mecocci , Franco Scarselli , Andrea Sodi

Color image inpainting is a challenging task in imaging science. The existing method is based on real operation, and the red, green and blue channels of the color image are processed separately, ignoring the correlation between each…

计算机视觉与模式识别 · 计算机科学 2024-06-18 Duan Wang , Dandan Zhu , Meixiang Zhao , Zhigang Jia

Compared to traditional methods, Deep Learning (DL) becomes a key technology for computer vision tasks. Synthetic data generation is an interesting use case for DL, especially in the field of medical imaging such as Magnetic Resonance…

计算机视觉与模式识别 · 计算机科学 2025-11-04 Md Sumon Ali , Muzammil Behzad

The goal of 2D tomographic reconstruction is to recover an image given its projections from various views. It is often presumed that projection angles associated with the projections are known in advance. Under certain situations, however,…

图像与视频处理 · 电气工程与系统科学 2021-11-16 Mona Zehni , Zhizhen Zhao

We present a deep learning framework based on a generative adversarial network (GAN) to perform super-resolution in coherent imaging systems. We demonstrate that this framework can enhance the resolution of both pixel size-limited and…

计算机视觉与模式识别 · 计算机科学 2019-03-12 Tairan Liu , Kevin de Haan , Yair Rivenson , Zhensong Wei , Xin Zeng , Yibo Zhang , Aydogan Ozcan