JASTEG2000 - Steganography for JPEG2000 Coded Images

2006 ◽  
Keyword(s):  
Coded Images

Monitoring water, sanitation, and hygiene (WASH) programmes in Timor-Leste with time-stamped, geo-coded images

Waterlines ◽  
2012 ◽  
Vol 31 (4) ◽  
pp. 293-305 ◽  
Author(s):  
Emily Christensen Rand ◽  
Crispen Wilson ◽  
Jessica Mercer
Keyword(s):  
Sanitation And Hygiene ◽  
Timor Leste ◽  
Coded Images

scholarly journals JPEG Quality Transcoding Using Neural Networks Trained with a Perceptual Error Measure

1999 ◽  
Vol 11 (1) ◽  
pp. 267-296 ◽  
Author(s):  
John Lazzaro ◽  
John Wawrzynek
Keyword(s):  
Prototype System ◽  
Training Procedure ◽  
Human Visual Perception ◽  
Error Measure ◽  
Jpeg Image ◽  
Perceptual Error ◽  
Image File ◽  
Visual Artifacts ◽  
Error Metric ◽  
Coded Images

A JPEG Quality Transcoder (JQT) converts a JPEG image file that was encoded with low image quality to a larger JPEG image file with reduced visual artifacts, without access to the original uncompressed image. In this article, we describe technology for JQT design that takes a pattern recognition approach to the problem, using a database of images to train statistical models of the artifacts introduced through JPEG compression. In the training procedure for these models, we use a model of human visual perception as an error measure. Our current prototype system removes 32.2% of the artifacts introduced by moderate compression, as measured on an independent test database of linearly coded images using a perceptual error metric. This improvement results in an average PSNR reduction of 0.634 dB.

Detection methods for blocking artefacts in transform coded images

2014 ◽  
Vol 8 (8) ◽  
pp. 435-444
Author(s):  
Jagroop Singh ◽  
Dilbag Singh ◽  
Moin Uddin
Keyword(s):  
Detection Methods ◽  
Coded Images

A simple algorithm for removing blocking artifacts in block-transform coded images

1998 ◽  
Vol 5 (2) ◽  
pp. 33-35 ◽  
Author(s):  
Jim Chou ◽  
M. Crouse ◽  
K. Ramchandran
Keyword(s):  
Simple Algorithm ◽  
Blocking Artifacts ◽  
Block Transform ◽  
Coded Images

scholarly journals Accessible and Informative Sectioned Images, Color-Coded Images, and Surface Models of the Ear

2013 ◽  
Vol 296 (8) ◽  
pp. 1180-1186 ◽  
Author(s):  
Hyo Seok Park ◽  
Min Suk Chung ◽  
Dong Sun Shin ◽  
Yong Wook Jung ◽  
Jin Seo Park
Keyword(s):  
Surface Models ◽  
Coded Images
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