Search results for "Pixel density"

showing 3 items of 3 documents

High-resolution far-field integral-imaging camera by double snapshot

2012

In multi-view three-dimensional imaging, to capture the elemental images of distant objects, the use of a field-like lens that projects the reference plane onto the microlens array is necessary. In this case, the spatial resolution of reconstructed images is equal to the spatial density of microlenses in the array. In this paper we report a simple method, based on the realization of double snapshots, to double the 2D pixel density of reconstructed scenes. Experiments are reported to support the proposed approach.

Computer scienceMotion PicturesComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISIONNear and far fieldlaw.inventionImaging Three-DimensionalOpticslawPhotographyHumansImage resolutionFatigueLensesMicrolensDepth PerceptionIntegral imagingbusiness.industryPhotographyAccommodation OcularEquipment DesignConvergence OcularAtomic and Molecular Physics and OpticsLens (optics)Computer Science::Computer Vision and Pattern RecognitionDepth perceptionbusinessAlgorithmsPixel densityOptics Express
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Study of spatial lateral resolution in off-axis digital holographic microscopy

2015

The lateral resolution in digital holographic microscopy (DHM) has been widely studied in terms of both recording and reconstruction parameters. Although it is understood that once the digital hologram is recorded the physical resolution is fixed according to the diffraction theory and the pixel density, still some researches link the resolution of the reconstructed wavefield with the recording distance as well as with the zero-padding technique. Aiming to help avoiding these misconceptions, in this paper we analyze the lateral resolution of DHM through the variation of those two parameters. To support our outcomes, we have designed numerical simulations and experimental verifications. Both…

DiffractionPhysicsImage formationbusiness.industryResolution (electron density)HolographyAtomic and Molecular Physics and OpticsElectronic Optical and Magnetic Materialslaw.inventionAngular spectrum methodOpticslawDigital holographic microscopyElectrical and Electronic EngineeringPhysical and Theoretical ChemistryInvariant (mathematics)businessPixel densityOptics Communications
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Wider is better but sharper is not: optimizing the image of camera-monitor systems

2021

The replacement of rear-view mirrors with camera-monitor systems introduces new opportunities for design, such as altering the image quality and the rearward field-of-view. We investigated how the image quality and field-of-view might affect the distance and time-to-contact estimation of other vehicles. Eighty-six subjects estimated either their egocentric distance to a stationary vehicle (Experiment I) or the time-to-contact to an approaching vehicle (Experiment II). Throughout the experiments, the pixel density and either the field-of-view or the viewing condition varied. A larger field-of-view increased distance estimation accuracy and confidence. Reduced pixel density led to larger esti…

PixelImage qualityComputer sciencebusiness.industrymedia_common.quotation_subjectPhysical Therapy Sports Therapy and RehabilitationHuman Factors and ErgonomicsField of viewDirtImage (mathematics)Contrast (vision)Computer visionArtificial intelligencebusinessImage resolutionPixel densitymedia_common
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