Results 111 to 120 of about 1,741,443 (291)
Extended Corrected-Moments Illumination Estimation
Electronic Imaging, 2016 A remarkably simple color constancy method was recently developed, based in essence on the Gray-Edge method, i.e., the assumption that the mean of color-gradients in a scene (or colors themselves, in a Gray-World setting) are close to being achromatic.
Chen, Xiaochuan +3 more
openaire +2 more sources
On Using Gait Biometrics to Enhance Face Pose Estimation
Many face biometrics systems use controlled environments where subjects are viewed directly facing the camera. This is less likely to occur in surveillance environments, so a process is required to handle the pose variation of the human head, change in ...
Nixon, Mark, Jung, Sung Uk
core +1 more source
Multiple-cue illumination estimation in textured scenes
, 2003 In this paper, we present a method that integrates cues from shading, shadow and specular reflections for estimating directional illumination in a textured scene.
Lin +4 more
core +1 more source
Advanced Functional Materials, EarlyView.Top‐down ultrasonication produces highly emissive Cs2ZrCl6:Te4+ nanocrystals (NCs) with a PLQY of 65%, which is higher compared to that of the NCs synthesized by typical bottom‐up hot‐injection synthesis. The colloidal Cs2ZrCl6:Te4+ NCs have been found to be potential candidates for x‐ray scintillation imaging.
Yang Liu +12 more
wiley +1 more source
Surface Reflectance Estimation and Natural Illumination Statistics [PDF]
, 2001 Humans recognize optical reflectance properties of surfaces such as metal, plastic, or paper from a single image without knowledge of illumination. We develop a machine vision system to perform similar recognition tasks automatically.
Adelson, Edward H. +2 more
core +1 more source
Heart rate from face videos under realistic conditions for advanced driver monitoring
Current Directions in Biomedical Engineering, 2017 The role of physiological signals has a large impact on driver monitoring systems, since it tells something about the human state. This work addresses the recursive probabilistic inference problem in time-varying linear dynamic systems to incorporate ...
Pilz Christian S. +3 more
doaj +1 more source
Forward‐Biased Perovskite Photodiodes for In‐Sensor Optical Change Sensing
Advanced Functional Materials, EarlyView.A forward‐biased perovskite photodiode is introduced as an in‐sensor analog preprocessing unit that uses current balancing between photocurrent and injection current to generate optical changes relative to programmable optical reference levels. The device directly converts reference‐relative optical changes into bipolar current signals, enabling sensor‐
Eungseon Yeon +14 more
wiley +1 more source
As-projective-as-possible bias correction for illumination estimation algorithms
, 2019 Illumination estimation is the key routine in a camera’s onboard auto-white-balance (AWB) function. Illumination estimation algorithms estimate the color of the scene’s illumination from an image in the form of an R, G, B vector in the sensor’s raw-RGB ...
Afifi, Mahmoud +3 more
core +1 more source
Advanced Functional Materials, EarlyView.A triplet‐blocking layer controls triplet exciton dynamics in blue upconversion OLEDs. The layer keeps charge transfer (CT)‐generated triplet excitons inside the triplet‐triplet annihilation (TTA) host, suppresses anode‐side interfacial quenching, and increases the steady‐state triplet population.
Qing‐Jun Shui +5 more
wiley +1 more source
Advanced Functional Materials, EarlyView.Atomically dispersed Ni–S4 sites on CdS nanorods induce interfacial charge polarization, directing photogenerated electrons to H2 evolution and holes to selective ester‐bond cleavage of poly(lactic acid). Without sacrificial reagents, this charge‐coupled system produces lactate while suppressing overoxidation, achieving an H2 evolution rate of 41.74 ...
Yu Yao +8 more
wiley +1 more source