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Showing posts with the label 3D imaging

LiDAR technology breaks traditional trade-off between wide field-of-view, high frame rate, and high resolution for ultra-fast 3D imaging

https://www.eurekalert.org/news-releases/1118472 "integrates astigmatic metalens/ spectral-acousto-optic scanning, solving inter-axis mismatch... 36.6 MHz frame-wise point acquisition rate, 102° field of view enabled by metalens' quadratic phase foundation, 6.5 mrad angular resolution, wide-angle astigmatism correction sharpens angular resolution... broadband pulsed laser undergoes spectral-temporal encoding... acousto-optic deflector/ blazed grating perform scanning... target echoes captured by photomultiplier tube... robotics, autonomous road/ aerial vehicles"

Post-Engineering of Axial Resolution in Fresnel Incoherent Correlation Holography adjusts depth of focus after hologram has been recorded

https://phys.org/news/2026-02-hologram-method-boosts-3d-image.html "intelligent microscope captures/ computationally merges set of holograms at different focal distances creating synthetic hologram... 5x increased depth of focus, maintains high image quality/ signal-to-noise ratios even under diffusive illumination (common imaging thick/ complex biological samples)... post-recording flexibility facilitating study of complex tissue dynamics and biological structures that are typically difficult to capture with static imaging systems" Related: Longitudinally engineered metasurfaces for 3D vectorial holography https://www.eurekalert.org/news-releases/1119056

Shape-Ray Estimation (SHARE): Spaces captured by ordinary smartphone can be immediately transformed into 3D virtual environments

https://www.eurekalert.org/news-releases/1105286 "creates high-quality 3D scenes, from small objects to outdoor environments, using only 2 to 3 ordinary photographs, without need to precisely measure physical spaces or camera position/ orientation (simultaneously estimates directly from images themselves)... aligns multiple images into unified space without shape distortion... no: specialized equipment, complex calibration, additional training... construction, media, gaming (using just smartphone camera), low-cost simulations in robotics/ autonomous driving" Related: Creating realistic 3D scenes from everyday online photos https://techxplore.com/news/2025-12-realistic-3d-scenes-everyday-online.html

Mid-IR nonlinear pinhole camera captures 3D images without lenses down to low light 1.5 photons per synchronized ultrafast pulse

https://www.eurekalert.org/news-releases/1097545 "chirped-period crystal accepts IR from many directions/ converts to visible, upconversion detection suppresses noise enabling low light conditions... 0.20 mm pinhole radius produces sharp details in image targets: 11 to 19 cm away, across all distances at 3.07 μm mid-IR confirming large depth range, up to 35 cm away demonstrating large depth of field, µm-level axial precision... relatively complex/ bulky laser setup should, with further research, become far more compact/ easier to deploy"

Holographic virtual reality 3D 3mm thick displays with formfactor not much larger than a pair of regular eyeglasses

https://www.eurekalert.org/news-releases/1092778 "holographic display with large field of view, large eyebox, image quality... uses light's reflecting intensity, phase (way waves synchronize)... mixed reality seamless melding of holographic imagery/ real world views... waveguide steers image to viewer’s eye... AI-calibration method optimizes holographic image quality/ 3D... large field of view/ area in which pupil can move still seeing entire image enhancing crispmess/ focus, immersiveness... no neck/ eye fatigue even with all-day use” Related: Ultra-thin 3D display delivers wide-angle, highly-detailed images https://techxplore.com/news/2025-11-ultra-thin-3d-display-wide.html

Quantum Multi-Wavelength Holography creates high-fidelity 3D images of microscopic objects using quantum entangled photons

https://www.brown.edu/news/2025-05-21/holography "illuminate target using IR, imaging using visible light quantum-entangled with the IR probe, capturing both intensity/ phase, enabling holographic images capturing object's contour depths, for accurate 3D images using indirect photons... IR for safe, skin-penetrating biological imaging, but doing so conventionally requires expensive IR detectors for imaging... instead, inexpensive silicon visible light detectors... using 2 slightly different wavelengths creates 25X longer synthetic wavelength"

Circularly polarized luminescent self-positioning microdevices enable adaptable 3D display information density/ interaction dimensionality

https://techxplore.com/news/2025-05-positioning-microdevices-circularly-polarized-luminescence.html "electro-controlled 3D displays with tunable, high-performance chiroptical signals, processability/ device integration... 3D images with depth information through simultaneously delivering parallax images to both eyes wearing polarized glasses... remotely operate robotic arms using depth information provided by 3D display... bridge between virtual/ real-world... 1.0 (maximum possible) luminescence dissymmetry factor... human-computer interaction/ information transmission for science, industry, medicine, aerospace"

Miniaturized snapshot polarization stereo imaging captures 3D details with a single camera integrating metasurface optics with AI

https://phys.org/news/2025-03-revolutionizing-3d-vision-miniaturized-snapshot.html "no multiple polarizers/ sequential exposures... captures full-Stokes polarization data in single shot, 25 dB extinction ratio, 65% central wavelength efficiency, 1.65 × 1.65 mm² large-scale polarization metasurface... separated 6 incident light polarization states, precisely guiding each polarization component to its target position... neural network processing... circular polarization enhances surface normal accuracy (depth precision within 0.15 mm)... biomedical/ autonomous imaging, industrial inspection... AR, robotic vision" Related: Real-time boundary detection from noisy images and single-shot HDR imaging expand applications https://techxplore.com/news/2025-05-real-boundary-noisy-images-shot.html Single-shot simultaneous intensity, phase, and polarization imaging with metasurface https://www.eurekalert.org/news-releases/1082108

AI-powered single monocular camera enables autonomous vehicles to react fast, see in 3D, and operate more safely/ cheaply

https://techxplore.com/news/2025-03-ai-camera-tech-cars.html "MonoFG: state-of-the-art accuracy, about $300/ unit (LiDAR costs up to $75K)... accurately distinguishea between foreground/ background, detecting pedestrians, cyclists, other vehicles... virtually real-time 18 fps decision-making, accuracy comparable with LiDAR, ranked No.1 for cyclist detection... this human-first AI reduces accident risks and increases public trust in self-driving technology. Real-world testing shows that MonoFG enhances road safety by enabling smarter, real-time decision-making" Related: Japanese Automaker Nissan Is Developing Vehicles With Self-Driving Technology https://www.usnews.com/news/business/articles/2025-09-21/japanese-automaker-nissan-is-developing-self-driving-technology Can shape priors make road perception more reliable for autonomous driving? https://www.eurekalert.org/news-releases/1110920 Hyundai Motor and Kia Unveil ‘Vision Pulse,’ Driver Safety Technology that Detects Beyond ...

Dynamic volumetric displays enabled by tunable upconversion in rare-Earth-doped glasses

https://www.eurekalert.org/news-releases/1074231 "3D images using volumetric pixels (voxels) do not need head-mounted devices/ complex visual tricks... laser-based enable vivid colors, high contrast ratios, now overcome low resolution, ghost voxels, absence of tunable, full-color emission in single material... RE3+-doped monolithic glasses (RE = Ho, Tm, Nd, Yb) tunable full-color emission under near-IR... leverages rare-earth ion optical properties in glass matrices... high optical transmittance, thermal/ chemical stability, low phonon energy, superior mechanical strength" Related: TIFRH researchers uncover a mechanism enabling glasses to self-regulate their brittleness https://www.eurekalert.org/news-releases/1084263

Generative AI fix to an existing technique could help artists, designers, and engineers create better, more realistic 3D models

https://www.eurekalert.org/news-releases/1067089 "leverages 2D image generation models to 3D, by enabling faster, sharp high-quality 3D shapes without additional training or complex post-processing, overcoming blurry/ cartoonish Score Distillation... Score Distillation Sampling pre-trained diffusion approximation infers missing term from current 3D, generating 3D... off-the-shelf, pre-trained image diffusion... virtual reality, film-making, engineering design" Related: AI image models gain creative edge by amplifying low-frequency features https://techxplore.com/news/2025-06-ai-image-gain-creative-edge.html Virtual reality meets particle physics: JUNO unveils immersive event display tool https://www.eurekalert.org/news-releases/1115946

Using light to suspend/ engrave 3D images inside a hand-held acrylic cube, erasable/ reusable using heat or light

https://phys.org/news/2024-08-technology-engrave-erasable-3d-images.html "imprints high-resolution 2D (numerous stacked), 3D, or animated images inside any translucent polymer, ranging from thin films to 6" thick, containing photosensitive azobenzene acting as a switch, reacting to red light paired with boron difluoride, enhancing switch's optics... heat or blue light erases it.,, projector illuminates treated polymer from different angles with various light patterns... photosensitive chemical activated where these patterns intersect, producing 3D patterns... medical scans, architecture, education, art" Related: Software tool turns everyday objects into animated, eye-catching displays—without electronics https://techxplore.com/news/2025-09-software-tool-everyday-animated-eye.html

EventLFM: single-shot 3D kHz-speed Fourier LFM event camera

https://phys.org/news/2024-06-event-camera-fourier-field-microscopy.html "records light field information at Fourier domain achieving consistently high spatial resolution across recovered volume... kHz frame rate determined by accumulation time, adjusted in post-processing step without affecting data capture speed... visualizing complex, dynamic 3D biologics: high-frequency blinking brains' voltage signals  with pulse widths as short as 1 ms, blood flow, rapid dynamic signals within scattering tissues (brain simulated by DMD patterns inducing spatiotemporal footprints at kHz rates(" Related: Pushing the limits of 'custom-made' microscopy: 3-D imaging of light-sensitive samples now 1,000 times faster https://phys.org/news/2025-02-limits-custom-microscopy-d-imaging.html Synchrotron in a closet: Bringing powerful 3D X-ray microscopy to smaller labs https://www.eurekalert.org/news-releases/1082201 Principal component analysis enhances 3D super-resolution microscopy ht...

Researchers create more precise 3D reconstructions using only two camera perspectives

https://techxplore.com/news/2024-06-precise-3d-reconstructions-camera-perspectives.html "combines neural network of surface with illumination process model considering light absorption... image brightness determines angle/ distance of surface relative to light source... natural surroundings to reconstruct relatively textureless objects... neural networks that predict 3D point clouds for individual video images that are then merged into a large-scale model of the roads traveled... autonomous driving, preservation of historical artifacts (digitize museum exhibits)" See also: In a first, 3D models created with just two images, can boost self-driving https://interestingengineering.com/innovation/3d-reconstructions-two-images-tum

Fast-moving objects 3D tracked real-time at record-breaking speeds based on single-pixel imaging

https://phys.org/news/2024-06-3d-tracking.html "only 6 bytes storage, 2.4 µs computation time... tracking speed >200X faster... illuminating scene with sequence of patterns, measuring corresponding intensity values with single-pixel detector... non-orthogonal projecting geometric light patterns onto 2 non-orthogonal planes creating 3D coordinates calculating object's position, also reducing device size, cost... tracking rate 6667 Hz, modulation rate... future: multiple object tracking with single-pixel imaging... autonomous driving, industrial inspection, security surveillance" Related: New motion-compensation approach delivers sharper single-pixel imaging for dynamic scenes https://www.eurekalert.org/news-releases/1097738 Enhanced phase-shifting technique captures 3D shapes of moving objects with high precision https://techxplore.com/news/2025-11-phase-shifting-technique-captures-3d.html Enabling a single pixel to see complex environments https://www.eurekalert.org/ne...

New AI technology enables 3D capture and editing of real-life objects

https://techxplore.com/news/2024-03-ai-technology-enables-3d-capture.html "Proximity Attention Point Rendering (PAPR): sweep around object with smartphone and get fully editable 3D model viewable from any angle... set of 2D photos of object becomes cloud of 3D points representing shape and appearance... resulting in video as viewer guided on a path around it using AI and ML... proximity attention: mathematically defining interpolator end-to-end between arbitrary set of 3D points using machine learning... when a point is moved, shape changes automatically in intuitive way" Related: New app performs real-time, full-body motion capture with a mobile device https://news.northwestern.edu/stories/2024/10/app-performs-motion-capture-with-a-smartphone/ Surrey announces world's first AI model for near-instant image creation on consumer-grade hardware https://www.eurekalert.org/news-releases/1067737 New AI system revolutionizes image editing with collaborative, competitive agents h...

Algorithm computes highly accurate full-color 3D reconstructions of areas behind obstacles

https://www.usf.edu/news/2024/science-fiction-meets-reality-usf-researchers-develop-technique-to-overcome-obstructed-views.aspx "turning ordinary surfaces into mirrors revealing faint shadows cast on nearby surfaces we can’t see with naked eye, in 3D using ordinary inexpensive digital camera... car crashes, self-driving cars, hostage situations, search-and-rescue, military... future:  more sensitive cameras, faster computing power, improved  algorithm which is still in its development phase" Related: Researchers leverage shadows to model 3D scenes, including objects blocked from view https://techxplore.com/news/2024-06-leverage-shadows-3d-scenes-blocked.html Generative AI improves a wireless vision system that sees through obstructions https://www.eurekalert.org/news-releases/1120657

Engineers develop terahertz imaging system capable of capturing real-time, 3D multi-spectral images

https://phys.org/news/2024-01-terahertz-imaging-capable-capturing-real.html "THz focal-plane array... imaging >1,000X faster capturing videos and providing real-time, 3D multi-spectral images maintaining high signal-to-noise ratio... 283,500 nanoantenna array providing spatial amplitude and phase distributions, temporal and spectral data bypassing need for raster scanning... machine learning-trained neural network enhances resolution in real time... images 3D patterns etched in silicon with >1,000 pixels... medical imaging, security screening, pharmaceutical/ agricultural product inspection"

Printable circularly polarized luminescence materials enable flexible, stereoscopic displaying

https://phys.org/news/2023-10-printable-circularly-polarized-luminescence-materials.html "Printing flexible 3D displays with 2 sets moving, deformable and free-form full-color pixel arrays based on orthogonal circularly polarized luminescence (CPL)... considerable contrast ratio and wide viewing angle... directly write customized graphics on substrates (polypropylene, cotton and polyester fabrics... meter-long luminous coatings... virtual reality, medical imaging, scientific visualization, information security, spintronics, quantum computing, biological detection, wearable devices (smartwatches)" Related: Advancements make laser-based imaging simpler and three-dimensional https://medicalxpress.com/news/2023-12-advancements-laser-based-imaging-simpler-three-dimensional.html Researchers develop highly fluorescent helical quinolizinium salts via rhodium-catalyzed synthesis https://phys.org/news/2025-10-highly-fluorescent-helical-quinolizinium-salts.html

Computational microscope achieves single-shot 3D high-resolution imaging with a wide field of view

https://phys.org/news/2023-08-microscope-3d-high-resolution-imaging-wide.html "low-cost, computational miniature mesoscope... miniature LED collimators freeform optics... clear resin. tabletop 3D printer, collimators, 4-LED array illuminator, light efficiency 80%... highly confined, uniform illumination 75 mW excitation power across 8-mm diameter circular region... boosted image contrast with hybrid emission filter combining interference and absorption filters... enhanced axial resolution to 25 μm, reducing reconstruction time to <4 sec... large-scale 3D fluorescence imaging and neural recording" Related: Superlensing without a super lens: Physicists boost microscopes beyond limits https://phys.org/news/2023-10-superlensing-super-lens-physicists-boost.html Researchers design smaller, more cost-efficient electron cryo-microscope https://phys.org/news/2023-11-smaller-cost-efficient-electron-cryo-microscope.html Quantum imaging could create bright future for advanced microsco...