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Window width (WW) and window level (WL) adjustments aid in visualizing anatomies with a suitable contrast. However, the presence of background noise in MR images biases the calculation of default WW/WL values since it necessitates a…

Image and Video Processing · Electrical Eng. & Systems 2019-08-05 Deepthi Sundaran , Dheeraj Kulkarni , Jignesh Dholakia

Normalization layers have been shown to improve convergence in deep neural networks, and even add useful inductive biases. In many vision applications the local spatial context of the features is important, but most common normalization…

Computer Vision and Pattern Recognition · Computer Science 2020-05-12 Anthony Ortiz , Caleb Robinson , Dan Morris , Olac Fuentes , Christopher Kiekintveld , Md Mahmudulla Hassan , Nebojsa Jojic

The existing binary foreground map (FM) measures to address various types of errors in either pixel-wise or structural ways. These measures consider pixel-level match or image-level information independently, while cognitive vision studies…

Computer Vision and Pattern Recognition · Computer Science 2019-09-04 Deng-Ping Fan , Cheng Gong , Yang Cao , Bo Ren , Ming-Ming Cheng , Ali Borji

Non-local self similarity (NSS) is a powerful prior of natural images for image denoising. Most of existing denoising methods employ similar patches, which is a patch-level NSS prior. In this paper, we take one step forward by introducing a…

Computer Vision and Pattern Recognition · Computer Science 2020-04-22 Yingkun Hou , Jun Xu , Mingxia Liu , Guanghai Liu , Li Liu , Fan Zhu , Ling Shao

We focus on the real-world problem of training accurate deep models for image classification of a small number of rare categories. In these scenarios, almost all images belong to the background category in the dataset (>95% of the dataset…

Computer Vision and Pattern Recognition · Computer Science 2020-09-01 Ravi Teja Mullapudi , Fait Poms , William R. Mark , Deva Ramanan , Kayvon Fatahalian

Image processing is one of the most immerging and widely growing techniques making it a lively research field. Image processing is converting an image to a digital format and then doing different operations on it, such as improving the…

Computer Vision and Pattern Recognition · Computer Science 2022-07-15 Bhishman Desai , Manish Paliwal , Kapil Kumar Nagwanshi

The Non-Local Means (NLM) image denoising algorithm pushed the limits of denoising. But it introduced a new paradigm, according to which one could capture the similarity of images with the NLM weights. We show that, contrary to the…

Statistics Theory · Mathematics 2013-11-18 Simon Postec , Jacques Froment , Béatrice Vedel

We consider the problem of digital halftoning from the view point of statistical mechanics. The digital halftoning is a sort of image processing, namely, representing each grayscale in terms of black and white binary dots. The digital…

Disordered Systems and Neural Networks · Physics 2010-11-09 Jun-ichi Inoue , Yohei Saika , Masato Okada

Automatic License Plate Recognition system is a challenging area of research now-a-days and binarization is an integral and most important part of it. In case of a real life scenario, most of existing methods fail to properly binarize the…

Computer Vision and Pattern Recognition · Computer Science 2015-01-26 Satadal Saha , Subhadip Basu , Mita Nasipuri , Dipak Kumar Basu

The paper describes a new image processing for a non-photorealistic rendering. The algorithm is based on a random generation of gray tones and competing statistical requirements. The gray tone value of each pixel in the starting image is…

Graphics · Computer Science 2007-05-23 A. Sparavigna , B. Montrucchio

Image colorization aims to bring colors back to grayscale images. Automatic image colorization methods, which requires no additional guidance, struggle to generate high-quality images due to color ambiguity, and provides limited user…

Computer Vision and Pattern Recognition · Computer Science 2025-03-20 Yifan Li , Shuai Yang , Jiaying Liu

We introduce the task of local relighting, which changes a photograph of a scene by switching on and off the light sources that are visible within the image. This new task differs from the traditional image relighting problem, as it…

Computer Vision and Pattern Recognition · Computer Science 2022-07-07 Audrey Cui , Ali Jahanian , Agata Lapedriza , Antonio Torralba , Shahin Mahdizadehaghdam , Rohit Kumar , David Bau

In this paper, we study the problem of generating a set ofrealistic and diverse backgrounds when given only a smallforeground region. We refer to this task as image outpaint-ing. The technical challenge of this task is to synthesize notonly…

Computer Vision and Pattern Recognition · Computer Science 2019-10-28 Lingzhi Zhang , Jiancong Wang , Jianbo Shi

Aerial images are often taken under poor lighting conditions and contain low resolution objects, many times occluded by other objects. In this domain, visual context could be of great help, but there are still very few papers that consider…

Computer Vision and Pattern Recognition · Computer Science 2016-07-20 Alina Elena Marcu

This paper presents a novel automatic face recognition approach based on local binary patterns. This descriptor considers a local neighbourhood of a pixel to compute the feature vector values. This method is not very robust to handle image…

Computer Vision and Pattern Recognition · Computer Science 2018-06-18 Pavel Král , Ladislav Lenc , Antonín Vrba

Image matting is an important vision problem. The main stream methods for it combine sampling-based methods and propagation-based methods. In this paper, we deal with the combination with a normalized weighting parameter, which could well…

Computer Vision and Pattern Recognition · Computer Science 2017-10-30 Ping Li , Tingyan Duan , Yongfeng Cao

Image segmentation has been a very active research topic in image analysis area. Currently, most of the image segmentation algorithms are designed based on the idea that images are partitioned into a set of regions preserving homogeneous…

Computer Vision and Pattern Recognition · Computer Science 2015-03-17 Yu Su , Margaret H. Dunham

Text extraction is an important problem in image processing with applications from optical character recognition to autonomous driving. Most of the traditional text segmentation algorithms consider separating text from a simple background…

Computer Vision and Pattern Recognition · Computer Science 2017-07-12 Shervin Minaee , Yao Wang

Image textures, as a kind of local variations, provide important information for human visual system. Many image textures, especially the small-scale or stochastic textures are rich in high-frequency variations, and are difficult to be…

Computer Vision and Pattern Recognition · Computer Science 2019-10-02 Wenzhao Zhao , Qiegen Liu , Yisong Lv , Binjie Qin

The use of high-dimensional features has become a normal practice in many computer vision applications. The large dimension of these features is a limiting factor upon the number of data points which may be effectively stored and processed,…

Computer Vision and Pattern Recognition · Computer Science 2015-06-18 Sakrapee Paisitkriangkrai , Chunhua Shen , Anton van den Hengel