Measuring Focus Quality in Color Space

Bazzi, Ahmad; Mutahira, Husna; Li, Mikhail; Muhammad, Mannan Saeed

doi:10.1109/c-code.2019.8681001

Cited by 5 publications

(2 citation statements)

References 14 publications

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“…The LV:Eu,Cr added dosage is varied for monitoring its influences on the light performances of the as-prepared white LED (WLED). The findings indicating the phosphor could be used for heat-generate application and solid-state LED lighting devices [18], [19].…”

Section: Introductionmentioning

confidence: 99%

The influences of LaVO4:Eu3+,Cr3+ red phosphors on white light-emitting diode applications

Hung Khanh,

Le Thai,

Minh Bui

et al. 2024

IJEECS

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In this present paper, the LaVO4:Eu3+,Cr3+ (LV:Eu,Cr) red-orange phosphorsare introduced in WLED fabrication. The LV:Eu,Cr phosphor is synthesized with high-temperature solid-phase reaction. The luminescence properties of the phosphor are monitored with ultraviolet-visible and near-infrared (UV-vis-NIR) measurements. The heat generating in the phosphor sample is also investigated with different power densities of the 980 nm laser. The phosphor exhibits absorption bands at 254 nm and 316 nm, suitable for UV light-emitting diodes (UV LED) applications. The Cr3+ concentrations have noticeable effects on the luminescence of the phosphor. The increasing Cr3+ dosage initiates reduction in Eu3+ emission intensity and luminescence lifetime average. The heat-activated amount in the phosphor is also significant with the higher concentration of Cr3+ ions. When using the LV:Eu,Cr phosphor in white light-emitting model (WLED), the dominant red-orange emission centered at 595 nm is observed, in addition to the blue peak at 453 nm. The luminosity, color rendition, and color uniformity of the WLED light are also discussed. The findings indicate that the phosphor can be combined with other high-efficiency blue and green phosphors to obtain the improved color rendition and luminous performances and used in heat-creating optical applications.

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Section: Introductionmentioning

confidence: 99%

The influences of LaVO4:Eu3+,Cr3+ red phosphors on white light-emitting diode applications

Hung Khanh,

Le Thai,

Minh Bui

et al. 2024

IJEECS

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“…These FM's consider gray scale images for depth recovery. Recently, color FM are also proposed which uses RGB information in the image to evaluate the quality of a pixel [11,12].…”

Section: Introductionmentioning

confidence: 99%

3D reconstruction of gastrointestinal regions using shape-from-focus

Bazzi

Farup

Floor

2023

Fifteenth International Conference on Machine Vision (ICMV 2022)

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3D shape reconstruction from images is an active topic in computer vision. Shape-from-Focus (SFF) is an important approach which requires image stack in a focus controlled manner to infer the 3D shape. In this article, 3D reconstruction of synthetic gastrointestinal regions is done using SFF. Image stack is generated in Blender software with focus controlled camera. A color focus measure is applied for shape recovery followed by a weighted L2 regularizer to estimate for inaccurate depth values. A precise comparison is done between recovered shape and ground truth data by measuring the depth error and correlation between them. Results shows that SFF technique will be practical for 3D reconstruction of GI regions with focus and motion controlled pillcams which is technologically feasible to implement.

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Deep Neural Network Based Shape Reconstruction for Application in Robotics

Mutahira

Bazzi

et al. 2019

2019 International Conference on Robotics and Automation in Industry (ICRAI)

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Measuring Focus Quality in Color Space

Cited by 5 publications

References 14 publications

The influences of LaVO4:Eu3+,Cr3+ red phosphors on white light-emitting diode applications

The influences of LaVO4:Eu3+,Cr3+ red phosphors on white light-emitting diode applications

3D reconstruction of gastrointestinal regions using shape-from-focus

Deep Neural Network Based Shape Reconstruction for Application in Robotics

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