Discrete cosine transform JPEG compression vs. 2D JPEG2000 compression: JNDmetrix visual discrimination model image quality analysis

2005 ◽  
Author(s):  
Khan M. Siddiqui ◽  
Jeffrey P. Johnson ◽  
Bruce I. Reiner ◽  
Eliot L. Siegel
Keyword(s):  
Image Quality ◽  
Discrete Cosine Transform ◽  
Visual Discrimination ◽  
Jpeg Compression ◽  
Quality Analysis ◽  
Image Quality Analysis ◽  
Cosine Transform ◽  
Model Image ◽  
Jpeg2000 Compression ◽  
Discrimination Model

scholarly journals Estimating Previous Quantization Factors on Multiple JPEG Compressed Images

2021 ◽  
Vol 2021 (1) ◽  
Author(s):  
Sebastiano Battiato ◽  
Oliver Giudice ◽  
Francesco Guarnera ◽  
Giovanni Puglisi
Keyword(s):  
Image Quality ◽  
Discrete Cosine Transform ◽  
Jpeg Compression ◽  
Compression Algorithm ◽  
Experimental Results ◽  
The Other ◽  
Cosine Transform ◽  
Novel Technique ◽  
Compressed Images ◽  
Acquisition Device

AbstractThe JPEG compression algorithm has proven to be efficient in saving storage and preserving image quality thus becoming extremely popular. On the other hand, the overall process leaves traces into encoded signals which are typically exploited for forensic purposes: for instance, the compression parameters of the acquisition device (or editing software) could be inferred. To this aim, in this paper a novel technique to estimate “previous” JPEG quantization factors on images compressed multiple times, in the aligned case by analyzing statistical traces hidden on Discrete Cosine Transform (DCT) histograms is exploited. Experimental results on double, triple and quadruple compressed images, demonstrate the effectiveness of the proposed technique while unveiling further interesting insights.

Standardization of Image Quality Analysis – ISO 19264

2016 ◽  
Vol 2016 (1) ◽  
pp. 111-116 ◽  
Author(s):  
Dietmar Wueller ◽  
Ulla Bøgvad Kejser
Keyword(s):  
Image Quality ◽  
Quality Analysis ◽  
Image Quality Analysis

Image Quality Analysis of X-ray Grating Interferometer Using Integrating-bucket Method

2020 ◽  
Vol 64 (2) ◽  
pp. 20503-1-20503-5
Author(s):  
Faiz Wali ◽  
Shenghao Wang ◽  
Ji Li ◽  
Jianheng Huang ◽  
Yaohu Lei ◽  
...  
Keyword(s):  
Image Quality ◽  
Phase Contrast ◽  
Quality Analysis ◽  
Phase Contrast Imaging ◽  
Phase Image ◽  
Contrast Imaging ◽  
High Quality ◽  
Image Quality Analysis ◽  
X Ray ◽  
Grating Interferometer

Abstract Grating-based x-ray phase-contrast imaging has the potential to enhance image quality and provide inner structure details non-destructively. In this work, using grating-based x-ray phase-contrast imaging system and employing integrating-bucket method, the quantitative expressions of signal-to-noise ratios due to photon statistics and mechanical error are analyzed in detail. Photon statistical noise and mechanical error are the main sources affecting the image noise in x-ray grating interferometry. Integrating-bucket method is a new phase extraction method translated to x-ray grating interferometry; hence, its image quality analysis would be of great importance to get high-quality phase image. The authors’ conclusions provide an alternate method to get high-quality refraction signal using grating interferometer, and hence increases applicability of grating interferometry in preclinical and clinical usage.

Image quality analysis and low dose dental CT

2005 ◽  
Vol 1281 ◽  
pp. 1177-1181 ◽  
Author(s):  
S.D. Bianchi ◽  
O. Rampado ◽  
L. Luberto ◽  
A.F. Genovesio ◽  
C.C. Bianchi ◽  
...  
Keyword(s):  
Image Quality ◽  
Low Dose ◽  
Quality Analysis ◽  
Image Quality Analysis ◽  
Dental Ct

Image quality analysis for different atmosphere slant path Zenith angle

2022 ◽  
Author(s):  
Faten Sh. Zainulabdeen ◽  
Ali H. Al-Hamdani ◽  
Mohammed A. R. Hussein ◽  
Qusay K. Ahmed ◽  
Zaman H. Kareem
Keyword(s):  
Image Quality ◽  
Zenith Angle ◽  
Quality Analysis ◽  
Image Quality Analysis ◽  
Slant Path

Automating routine CT image quality analysis from a virtual server

2018 ◽  
Vol 52 ◽  
pp. 166
Author(s):  
Patrick Monnelly ◽  
John Cronin ◽  
Peter Woulfe
Keyword(s):  
Image Quality ◽  
Quality Analysis ◽  
Ct Image ◽  
Image Quality Analysis ◽  
Ct Image Quality
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