70 research outputs found
Improved methods and system for watermarking halftone images
Watermarking is becoming increasingly important for content control and authentication. Watermarking seamlessly embeds data in media that provide additional information about that media. Unfortunately, watermarking schemes that have been developed for continuous tone images cannot be directly applied to halftone images. Many of the existing watermarking methods require characteristics that are implicit in continuous tone images, but are absent from halftone images. With this in mind, it seems reasonable to develop watermarking techniques specific to halftones that are equipped to work in the binary image domain. In this thesis, existing techniques for halftone watermarking are reviewed and improvements are developed to increase performance and overcome their limitations. Post-halftone watermarking methods work on existing halftones. Data Hiding Cell Parity (DHCP) embeds data in the parity domain instead of individual pixels. Data Hiding Mask Toggling (DHMT) works by encoding two bits in the 2x2 neighborhood of a pseudorandom location. Dispersed Pseudorandom Generator (DPRG), on the other hand, is a preprocessing step that takes place before image halftoning. DPRG disperses the watermark embedding locations to achieve better visual results. Using the Modified Peak Signal-to-Noise Ratio (MPSNR) metric, the proposed techniques outperform existing methods by up to 5-20%, depending on the image type and method considered. Field programmable gate arrays (FPGAs) are ideal for solutions that require the flexibility of software, while retaining the performance of hardware. Using VHDL, an FPGA based halftone watermarking engine was designed and implemented for the Xilinx Virtex XCV300. This system was designed for watermarking pre-existing halftones and halftones obtained from grayscale images. This design utilizes 99% of the available FPGA resources and runs at 33 MHz. Such a design could be applied to a scanner or printer at the hardware level without adversely affecting performance
NASA's Land, Atmosphere Near Real-Time Capability for EOS (LANCE): Delivering Data and Imagery to Meet the Needs of Near Real-Time Applications
NASA's Land, Atmosphere Near real-time Capability for EOS (LANCE) is a virtual system that provides near real-time EOS data and imagery from the AIRS, AMSR2, LIS (ISS), MISR, MLS, MODIS, MOPITT, OMI, OMPS, and VIIRS instruments, to meet the needs of scientists and application users interested in monitoring a wide variety of natural and man-made phenomena. NRT imagery from LANCE are available through NASA's Global Imagery Browse Services (GIBS), Worldview, FIRMS and most recently through Worldview Snapshots a low band width application that has replaced the Rapid Response Subsets. Over the past year: data and imagery from the Lightning Imaging Sensor (LIS) on board the International Space Station (ISS), OMPS and VIIRS-Land have been added to LANCE. In the coming year LANCE will integrate the MODIS NRT Global Flood product, VIIRS Black Marble nighttime lights and Cloud Mask and Aerosol Dark Target from VIIRS Atmosphere. Here we provide a brief overview of LANCE, focusing on what's new and describing how these new data sets have been used to monitor lightning flashes, hurricanes and fires. For more information on LANCE visit: https://earthdata.nasa.gov/lance
The Vehicle, Fall 1986
Table of Contents
Selling Poetry: Honesty with the InvestorPatrick Peterspage 2
Father\u27s Book, Jan. 1984 (A Fictional Autobiography)James T. Finneganpage 3
Pet Day in Afternoon KindergartenDan Von Holtenpage 7
Dental Dreams in the Bathroom MirrorDan Von Holtenpage 7
PhotographStephanie Eihlpage 8
SilenceJoe Hortonpage 8
SkullMichael Salempage 9
The TunnelJim Harrispage 10
Lindenwood CemeteryJean Chandlerpage 12
Into the SeaDan Seltzerpage 13
PhotographStephanie Eihlpage 13
WindowsJim Harrispage 14
Little Pieces of YouStuart Albertpage 18
Slicing the AppleAmy Callpage 19
Winter WalkLarry Mitchellpage 19
Komical KellyJohn Fehrmannpage 20
Thermal SueJohn Fehrmannpage 20
Death PoemBob Zordanipage 21
Venice, ItalySherry L. Clinepage 22
RoadkillPhil Simpsonpage 24
I Hate CowsLori Delzer, Joe Crites, Becky Michaelpage 32
Telephone Operators: 1942Jim Harrispage 33
Expiration Date 3/8/65Edward Schellpage 34
Desert FloorPatrick Peterspage 35
PhotographLawrence McGownpage 36
PhotographStephanie Eihlpage 37
Coping with NightStuart Albertpage 38
PhotographDan Mountpage 38
One On OnePatrick Peterspage 39
An Acquired TasteTina Wrightpage 40
PhotographStephanie Eihlpage 40
PhotographStephanie Eihlpage 41
When Children Are Alone, The Devil SpeaksTom Greenpage 41
BobChristy Denphypage 42
Gut & ScissorsDane Buczkowskipage 42
This Old HouseAmy Callpage 43
MortgageTina Wrightpage 43https://thekeep.eiu.edu/vehicle/1048/thumbnail.jp
The Vehicle, Fall 1986
Table of Contents
Selling Poetry: Honesty with the InvestorPatrick Peterspage 2
Father\u27s Book, Jan. 1984 (A Fictional Autobiography)James T. Finneganpage 3
Pet Day in Afternoon KindergartenDan Von Holtenpage 7
Dental Dreams in the Bathroom MirrorDan Von Holtenpage 7
PhotographStephanie Eihlpage 8
SilenceJoe Hortonpage 8
SkullMichael Salempage 9
The TunnelJim Harrispage 10
Lindenwood CemeteryJean Chandlerpage 12
Into the SeaDan Seltzerpage 13
PhotographStephanie Eihlpage 13
WindowsJim Harrispage 14
Little Pieces of YouStuart Albertpage 18
Slicing the AppleAmy Callpage 19
Winter WalkLarry Mitchellpage 19
Komical KellyJohn Fehrmannpage 20
Thermal SueJohn Fehrmannpage 20
Death PoemBob Zordanipage 21
Venice, ItalySherry L. Clinepage 22
RoadkillPhil Simpsonpage 24
I Hate CowsLori Delzer, Joe Crites, Becky Michaelpage 32
Telephone Operators: 1942Jim Harrispage 33
Expiration Date 3/8/65Edward Schellpage 34
Desert FloorPatrick Peterspage 35
PhotographLawrence McGownpage 36
PhotographStephanie Eihlpage 37
Coping with NightStuart Albertpage 38
PhotographDan Mountpage 38
One On OnePatrick Peterspage 39
An Acquired TasteTina Wrightpage 40
PhotographStephanie Eihlpage 40
PhotographStephanie Eihlpage 41
When Children Are Alone, The Devil SpeaksTom Greenpage 41
BobChristy Denphypage 42
Gut & ScissorsDane Buczkowskipage 42
This Old HouseAmy Callpage 43
MortgageTina Wrightpage 43https://thekeep.eiu.edu/vehicle/1048/thumbnail.jp
Expanding NASA's Land, Atmosphere Near Real-Time Capability for EOS (LANCE)
NASA's Land, Atmosphere Near real-time Capability for EOS (LANCE) is a virtual system that provides near real-time EOS data and imagery to meet the needs of scientists and application users interested in monitoring a wide variety of natural and man-made phenomena in near real-time. Over the last year: near real-time data and imagery from MOPITT, MISR, OMPS and VIIRS (Land and Atmosphere), the Fire Information for Resource Management System (FIRMS) has been updated and LANCE has begun the process of integrating the Global NRT flood, and Black Marble products. In addition, following the AMSU-A2 instrument anomaly in September 2016, AIRS-only products have replaced the NRT level 2 AIRS+AMSU products. This presentation provides a brief overview of LANCE, describes the new products that are recently available and contains a preview of what to expect in LANCE over the coming year
Dark sectors 2016 Workshop: community report
This report, based on the Dark Sectors workshop at SLAC in April 2016,
summarizes the scientific importance of searches for dark sector dark matter
and forces at masses beneath the weak-scale, the status of this broad
international field, the important milestones motivating future exploration,
and promising experimental opportunities to reach these milestones over the
next 5-10 years
2016 Research & Innovation Day Program
A one day showcase of applied research, social innovation, scholarship projects and activities.https://first.fanshawec.ca/cri_cripublications/1003/thumbnail.jp
CMB-S4: Forecasting Constraints on Primordial Gravitational Waves
CMB-S4---the next-generation ground-based cosmic microwave background (CMB)
experiment---is set to significantly advance the sensitivity of CMB
measurements and enhance our understanding of the origin and evolution of the
Universe, from the highest energies at the dawn of time through the growth of
structure to the present day. Among the science cases pursued with CMB-S4, the
quest for detecting primordial gravitational waves is a central driver of the
experimental design. This work details the development of a forecasting
framework that includes a power-spectrum-based semi-analytic projection tool,
targeted explicitly towards optimizing constraints on the tensor-to-scalar
ratio, , in the presence of Galactic foregrounds and gravitational lensing
of the CMB. This framework is unique in its direct use of information from the
achieved performance of current Stage 2--3 CMB experiments to robustly forecast
the science reach of upcoming CMB-polarization endeavors. The methodology
allows for rapid iteration over experimental configurations and offers a
flexible way to optimize the design of future experiments given a desired
scientific goal. To form a closed-loop process, we couple this semi-analytic
tool with map-based validation studies, which allow for the injection of
additional complexity and verification of our forecasts with several
independent analysis methods. We document multiple rounds of forecasts for
CMB-S4 using this process and the resulting establishment of the current
reference design of the primordial gravitational-wave component of the Stage-4
experiment, optimized to achieve our science goals of detecting primordial
gravitational waves for at greater than , or, in the
absence of a detection, of reaching an upper limit of at CL.Comment: 24 pages, 8 figures, 9 tables, submitted to ApJ. arXiv admin note:
text overlap with arXiv:1907.0447
The genetic architecture of the human cerebral cortex
The cerebral cortex underlies our complex cognitive capabilities, yet little is known about the specific genetic loci that influence human cortical structure. To identify genetic variants that affect cortical structure, we conducted a genome-wide association meta-analysis of brain magnetic resonance imaging data from 51,665 individuals. We analyzed the surface area and average thickness of the whole cortex and 34 regions with known functional specializations. We identified 199 significant loci and found significant enrichment for loci influencing total surface area within regulatory elements that are active during prenatal cortical development, supporting the radial unit hypothesis. Loci that affect regional surface area cluster near genes in Wnt signaling pathways, which influence progenitor expansion and areal identity. Variation in cortical structure is genetically correlated with cognitive function, Parkinson's disease, insomnia, depression, neuroticism, and attention deficit hyperactivity disorder
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