(Press-News.org) WASHINGTON, May 30, 2023 – Holograms are often displayed in science fiction as colorful, life-sized projections. But what seems like the technology of the future is actually the technology of the present, and now it has been used to recreate the Mona Lisa.
In Applied Physics Reviews, by AIP Publishing, researchers from Tianjin University, the Beijing Institute of Technology, Rowan University, the University of Missouri, Qingdao University, Shijiazhuang Tiedao University, and Beijing Jiaotong University developed an acoustic metasurface-based holography technique that uses a deep learning algorithm to generate and iteratively improve a hologram of the Mona Lisa.
Holograms are images created by recording and reconstructing the interference pattern of light or sound waves. They provide realistic and immersive visual or auditory experiences and can be applied in entertainment, medical imaging, and communication, among other fields.
Metasurfaces, or two-dimensional materials made of an array of tiny antenna-like components, can help a lot with the holography process.
“A metasurface-based hologram works by precisely controlling the phase and amplitude of the waves interacting with the metasurface,” said author Yue-Sheng Wang. “As a result, the outgoing waves at each pixel exhibit a certain amplitude and phase, which results in the desired holographic image based on their interference.”
The team wanted to develop a metasurface holography optimization method to enhance efficiency and precision. They used a deep neural network-based algorithm to customize the antenna-like structures within their metasurface. By iteratively reducing inconsistencies between the original and holographic image, they tweaked the metasurface and created a high-quality hologram.
“We chose to recreate the Mona Lisa as a proof of concept,” said Wang. “It is so famous that almost everyone knows about it. It is filled with countless delicate and subtle transitions of layers, which enhances the softness, haziness, and mystery of the painting. So it is a great way to demonstrate the effectiveness of our method.”
The holographic method successfully reconstructed the Mona Lisa, and, in even more detail, her left eye. While the Mona Lisa hologram is two-dimensional, the technique can be extended to create three-dimensional images as well.
“The precise control of sound waves offered by our holography method is crucial for advancing non-invasive medical therapies, effective noise control, and optimizing acoustic environments like concert halls,” said Wang. “These improvements have the potential to enhance quality of life and various technological applications.”
The authors believe their technique could revolutionize the field of holography. They plan to explore ways to generalize it, make it compatible with 3D printing, and reduce training time.
###
The article, "Deep-Learning-Aided Metasurface Design for Megapixel Acoustic Hologram," is authored by Xuan-Bo Miao, Hao-Wen Dong, Sheng-Dong Zhao, Shi-Wang Fan, Guoliang Huang, Chen Shen, and Yue-Sheng Wang. It will appear in Applied Physics Reviews on May 30, 2023 (DOI: 10.1063/5.0136802). After that date, it can be accessed at https://doi.org/10.1063/5.0136802.
ABOUT THE JOURNAL
Applied Physics Reviews features articles on significant and current topics in experimental or theoretical research in applied physics, or in applications of physics to other branches of science and engineering. The journal publishes both original research on pioneering studies of broad interest to the applied physics community, and reviews on established or emerging areas of applied physics. See https://aip.scitation.org/journal/are.
END
The making of a Mona Lisa hologram
A deep learning algorithm and metasurface combine to recreate a high-resolution image of the famous portrait
2023-05-30
ELSE PRESS RELEASES FROM THIS DATE:
How insects track odors by navigating microscale winds
2023-05-30
WASHINGTON, May 30, 2023 -- How do flying insects like important pollinators locate odor sources in the great outdoors, despite encountering highly variable wind conditions? They use odor plumes — which travel like smoke and form when the wind blows odor molecules from their source — to track down sources such as flowers or pheromones.
But wind tunnels are typically unable to replicate realistic outdoor wind conditions. In Physics of Fluids, by AIP Publishing, University of Nevada at Reno researchers decided to explore microscale wind conditions in various outdoor environments to better understand what flying insects might experience while tracking odor plumes.
Authors ...
Sleep health before SARS-CoV-2 infection and risk of long COVID
2023-05-30
About The Study: The findings of this study that included 1,979 women indicate that healthy sleep measured prior to SARS-CoV-2 infection, both before and during the COVID-19 pandemic, may be protective against post–COVID-19 condition (PCC), also known as long COVID. Future research should investigate whether interventions on sleep health may prevent PCC or improve PCC symptoms.
Authors: Siwen Wang, M.D., of the Harvard T. H. Chan School of Public Health in Boston, is the corresponding author.
To access the embargoed study: ...
Association between heart attack and cognition
2023-05-30
About The Study: In this study of 30,465 adults without myocardial infarction (MI; heart attack), stroke, or dementia, overall, incident MI was not associated with an acute decrease in global cognition, memory, or executive function at the time of the event compared with no MI. The rate of decline in global cognition, memory, and executive function was significantly faster over the years for adults with an MI event compared with those without an MI. These findings suggest that prevention of MI ...
Volunteering, health, and well-being of children and adolescents
2023-05-30
About The Study: Using survey data from across the United States, researchers found that volunteering was associated with higher odds of excellent or very good health and flourishing in children and adolescents, and with lower odds of anxiety in adolescents and behavioral problems in children and adolescents.
Authors: Kevin Lanza, Ph.D., of the Michael & Susan Dell Center for Healthy Living in Austin, Texas, is the corresponding author.
To access the embargoed study: Visit our For The Media website at this link https://media.jamanetwork.com/
(doi:10.1001/jamanetworkopen.2023.15980)
Editor’s ...
Use of metabolic and bariatric surgery among youth
2023-05-30
About The Study: Use of and access to metabolic and bariatric surgery (MBS) have increased among U.S. youth and among most racial and ethnic groups. Compared with 2015-2019, MBS use in youths increased significantly in 2020-2021 during the first 2 years of the COVID-19 pandemic. In contrast, MBS rates in adults decreased in 2020.
Authors: Sarah E. Messiah, Ph.D., of the University of Texas Health Science Center at Houston School of Public Health—Dallas Campus, is the corresponding author.
To access the embargoed study: Visit our For The Media website at this link https://media.jamanetwork.com/
(doi:10.1001/jamapediatrics.2023.0803)
Editor’s ...
Racial, ethnic, and language disparities in identifying and mitigating central line–associated bloodstream infections
2023-05-30
About The Study: The results of this study of 8,269 pediatric patients show disparities in central line–associated bloodstream infection rates for Black patients and patients who speak a language other than English that persisted after adjusting for known risk factors, suggesting that systemic racism and bias may play a role in inequitable hospital care for hospital-acquired infections. Stratifying outcomes to assess for disparities prior to quality improvement efforts may inform targeted interventions to improve ...
Philosophy aligns with economics on how to value future generations in climate policy
2023-05-30
A survey of philosophers finds they broadly agree with economists on the best way of valuing the environment of the future in policy decisions made now – although for different reasons.
In a new study published in Nature Climate Change, environmental economists including the University of Exeter’s Professor Ben Groom found consensus between the two academic disciplines over an aspect of climate policy known as the ‘social discount rate’, with philosophers offering support for a rate of 2% - a value predominantly backed by economists, and which is in line with UN climate ...
Researchers proposed a deep neural network-based 4-quadrant analog sun sensor calibration
2023-05-30
A spacecraft can estimate the attitude state by comparing external measurements from attitude sensors with reference information. CubeSats tend to use 4-quadrant analog solar sensors which have the advantages of extremely low power consumption, minimal volume, low complexity, low cost, and high reliability as attitude sensors, considering the limitation of satellite volume and payload. The performance of the sensor can be importantly improved by the calibration procedure and compensation model. However, the various error sources affecting the calibration of the 4-quadrant sun sensor lead to a complicated ...
Obesity increases risk of mental disorders throughout life
2023-05-30
Being obese significantly increases the chances of also developing mental disorders. This applies to all age groups, with women at higher risk than men for most diseases, as a recent study of the Complexity Science Hub and the Medical University of Vienna shows. The results were published in the specialist journal "Translational Psychiatry".
“We analyzed a population-wide national registry of inpatient hospitalizations in Austria from 1997 to 2014 in order to determine the ...
Researchers confirm the protective effect of hydrogen inhalation on declining brain function under hindlimb unloading conditions and disclose the underlying mechanism
2023-05-30
Astronauts are affected by various physical and chemical factors during spaceflight, resulting in a series of pathological and physiological changes. Many studies have shown that spaceflight causes oxidative stress and induces brain disorder in astronauts, negatively affecting neuronal function and brain structure. However, the underlying mechanisms and the countermeasures need to be further explored. Moreover, it is observed that hydrogen has preventative and curative effects on ischemia–reperfusion ...
LAST 30 PRESS RELEASES:
CMD-OPT model enables the discovery of a potent and selective RIPK2 inhibitor as preclinical candidate for the treatment of acute liver injury
Melatonin receptor 1a alleviates sleep fragmentation-aggravated testicular injury in T2DM by suppression of TAB1/TAK1 complex through FGFR1
Single-cell RNA sequencing reveals Shen-Bai-Jie-Du decoction retards colorectal tumorigenesis by regulating the TMEM131–TNF signaling pathway-mediated differentiation of immunosuppressive dendritic ce
Acta Pharmaceutica Sinica B Volume 15, Issue 7 Publishes
New research expands laser technology
Targeted radiation offers promise in patients with metastasized small cell lung cancer to the brain
A high clinically translatable strategy to anti-aging using hyaluronic acid and silk fibroin co-crosslinked hydrogels as dermal regenerative fillers
Mount Sinai researchers uncover differences in how males and females change their mind when reflecting on past mistakes
CTE and normal aging are difficult to distinguish, new study finds
Molecular arms race: How the genome defends itself against internal enemies
Tiny chip speeds up antibody mapping for faster vaccine design
KTU experts reveal why cultural heritage is important for community unity
More misfolded proteins than previously known may contribute to Alzheimer’s and dementia
“Too much going on”: Autistic adults overwhelmed by non-verbal social cues
What’s driving America’s deep freezes in a warming world?
A key role of brain protein in learning and memory is deciphered by scientists
Heart attacks don’t follow a Hollywood script
Erin M. Schuman wins 2026 Nakasone Award for discovery on neural synapse function and change during formation of memories
Global ocean analysis could replace costly in-situ sound speed profiles in seafloor positioning, study finds
Power in numbers: Small group professional coaching reduces rates of physician burnout by nearly 30%
Carbon capture, utilization, and storage: A comprehensive review of CCUS-EOR
New high-temperature stable dispersed particle gel for enhanced profile control in CCUS applications
State gun laws and firearm-related homicides and suicides
Use of tobacco and cannabis following state-level cannabis legalization
Long-term obesity and biological aging in young adults
Eindhoven University of Technology and JMIR Publications announce unlimited open access publishing agreement
Orphan nuclear receptors in metabolic dysfunction-associated steatotic liver disease development
A technological breakthrough for ultra-fast and greener AI
Pusan National University researchers identify key barriers hindering data-driven smart manufacturing adoption
Inking heterometallic nanosheets: A scalable breakthrough for coating, electronics, and electrocatalyst applications
[Press-News.org] The making of a Mona Lisa hologramA deep learning algorithm and metasurface combine to recreate a high-resolution image of the famous portrait