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Charting Image Artifacts in Digital Image Sequences Using Velocital Information Content

Summary: Charting Image Artifacts in Digital Image Sequences Using
Velocital Information Content
Gregory J. Powera, Mohammad A. Karim, and Farid Ahme&
aAjr Force Research Laboratory, AFRL/SNAT/Target Recognition Branch,
2010 5th Street, Wright-Patterson AFB, Ohio 45433-7001
bUniversity of Dayton, Department of Electrical and Computer Engineering,
300 College Park, Dayton, Ohio 45469-0226
cElectrical Engineering, School of Engineering and Engineering Technology,
Pennsylvania State University, The Behrend College,
Erie, PA, 16563-1701
This paper introduces a metric called Velocital Information Content (VIC) which is used to chart quality variations
in digital image sequences. Both spatially-based and temporally-based artifacts are charted using this single metric.
VIC is based on the velocital information in each image. A mathematical formulation for VIC is shown along with
its relation to the spatial and temporal information content. Some strengths and weaknesses of the VIC formulation
are discussed. VIC is tested on some standard image sequences with various spatio-temporal attributes. VIC is also
tested on a standard image sequence with various degrees of blurring using a linear blurring algorithm. Additionally,
VIC is tested using standard sequences that have been processed through a digital transmission algorithm. The
transmission algorithm is based on the discrete cosine transform (DCT), and thus introduces many of the known
digital artifacts such as blocking. Finally, the ability of VIC to chart image artifacts is compared to a few other


Source: Ahmed, Farid - Department of Electrical Engineering and Computer Science, Catholic University of America


Collections: Engineering