Results 71 to 80 of about 3,396,344 (245)

Massive Online Crowdsourced Study of Subjective and Objective Picture Quality

, 2015
Most publicly available image quality databases have been created under highly controlled conditions by introducing graded simulated distortions onto high-quality photographs.
Bovik, Alan C., Ghadiyaram, Deepti
core   +1 more source

Evaluation of Image Cryptography by Using Secret Session Key and SF Algorithm

Iraqi Journal for Computers and Informatics, 2023
In the unreliable domain of data communication, safeguarding information from unauthorized access is imperative. Given the widespread application of images across various fields, ensuring the confidentiality of image data holds paramount importance. This
Noor Kareem Jumaa, Abbas Muhammed Allawy
doaj  

Visual-Quality-Driven Learning for Underwater Vision Enhancement

, 2018
The image processing community has witnessed remarkable advances in enhancing and restoring images. Nevertheless, restoring the visual quality of underwater images remains a great challenge.
Amaral, Henrique Grandinetti Barbosa, Barbosa, Walysson Vital, Nascimento, Erickson Rangel, Rocha, Thiago Lages   +3 more
core   +1 more source

Quality assurance in ophthalmic imaging

Indian Journal of Ophthalmology, 2019
Quality assurance (QA) is the maintenance of a desired level of quality in a service, by means of attention to every stage of process of delivery. Correct image acquisition along with accurate and reproducible quantification of ophthalmic imaging is crucial for evaluating disease progression/stabilization, response to therapy, and planning proper ...
T Nirmal Fredrick, Suneeta Dubey, Kanika Jain   +2 more
openaire   +4 more sources

Investigation of iterative image reconstruction in three-dimensional optoacoustic tomography

, 2012
Iterative image reconstruction algorithms for optoacoustic tomography (OAT), also known as photoacoustic tomography, have the ability to improve image quality over analytic algorithms due to their ability to incorporate accurate models of the imaging ...
Alexander A Oraevsky, Barrett H H, Elbau P, Kun Wang, Kunyansky L A, Mark A Anastasio, Pan X, Richard Su, Wang L V, Wernick M N   +9 more
core   +1 more source

Objective measurements of image quality

Ultrasound in Medicine & Biology, 2004
Tissue harmonic imaging (THI) and compound imaging have been reported clinically to improve contrast resolution, tissue differentiation and overall image quality. However, there have been limited studies to date to quantify objectively the improvements in image quality achieved with these new imaging techniques.
Browne, Jacinta, Watson, Amanda, Gibson, Nicholas, Dudley, Nicholas, Elliott, Alex   +4 more
openaire   +5 more sources

Changes in subclinical cardiac abnormalities 1 Year after recovering from COVID-19 in patients without clinical cardiac findings

Heliyon
Aim: To evaluate the subclinical cardiac involvement in COVID-19 patients without clinical cardiac evidence using cardiac MR imaging. Material and methods: Participants recovered from COVID-19 without cardiac symptoms and no cardiovascular medical ...
Haitao Wang, Wei Deng, Yang Zhang, Jinxiu Yang, Zhen Wang, Bin Liu, Yuchi Han, Yongqiang Yu, Ren Zhao, Xiaohu Li   +9 more
doaj   +1 more source

Perceptual Quality Study on Deep Learning based Image Compression

, 2019
Recently deep learning based image compression has made rapid advances with promising results based on objective quality metrics. However, a rigorous subjective quality evaluation on such compression schemes have rarely been reported.
Akyazi, Pinar, Cheng, Zhengxue, Ebrahimi, Touradj, Katto, Jiro, Sun, Heming   +4 more
core   +1 more source

Differences in myocardial involvement between new onset and longstanding systemic lupus erythematosus patients assessed by cardiovascular magnetic resonance

European Journal of Radiology Open
Objectives: Subclinical myocardial involvement is common in systemic lupus erythematosus (SLE), but differences between new onset and longstanding SLE are not fully elucidated.
Zhen Wang, Xing Tang, Chaohui Hang, Hui Gao, Jinxiu Yang, Yuchi Han, Yongqiang Yu, Zongwen Shuai, Ren Zhao, Xiaohu Li   +9 more
doaj   +1 more source

Quality Assessment of HDR/WCG Images Using HDR Uniform Color Spaces

Journal of Imaging, 2019
High Dynamic Range (HDR) and Wide Color Gamut (WCG) screens are able to render brighter and darker pixels with more vivid colors than ever. To assess the quality of images and videos displayed on these screens, new quality assessment metrics adapted to ...
Maxime Rousselot, Olivier Le Meur, Rémi Cozot, Xavier Ducloux   +3 more
doaj   +1 more source