Search: spatial frequency — Academic Articles

Synthetic Tactile Sensor for Macroscopic Roughness Estimation Based on Spatial-Coding Contact Processing

Muhammad Irwan Yanwari, Shogo Okamoto • Sensors (2025)

Traditional tactile sensors primarily measure macroscopic surface features but do not directly estimate how humans perceive such surface roughness. Sensors that mimic human tactile processing could bridge this gap. This study proposes a met...

DOAJ Open Access (DOAJ) DOI: 10.3390/s25082598

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Contrast Sensitivity Is Associated With Chorioretinal Thickness and Vascular Density of Eyes in Simple Early-Stage High Myopia

Xinting Liu, Yanli Wang, Xiaoxiao Ying, Fen Zhang et al. • Frontiers in Medicine (2022)

ObjectiveTo evaluate the contrast sensitivity function (CSF), chorioretinal thickness and vascular density as well as their relationships in subjects with simple early-stage high myopia.MethodsEighty-one young subjects were enrolled in this...

DOAJ Open Access (DOAJ) DOI: 10.3389/fmed.2022.847817

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Computational Adaptive Optics for HAR Hybrid Trench Array Topography Measurement by Utilizing Coherence Scanning Interferometry

Wenyou Qiao, Zhishan Gao, Qun Yuan, Lu Chen et al. • Sensors (2025)

High aspect ratio (HAR) sample-induced aberrations seriously affect the topography measurement for the bottom of the microstructure by coherence scanning interferometry (CSI). Previous research proposed an aberration compensating method usi...

DOAJ Open Access (DOAJ) DOI: 10.3390/s25134085

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Study of Efficiency Fractal Optical Modulator for insulator material by testing modulation transfer function

Mohammed L. Jabbar, Abbas Shwya Alwan • مجلة علوم ذي قار (2019)

Chopper is an important component in optical system. It represents a device, which changes the angle between the coordinate and vision lines of the target for the electrical signal. The chopper modulates the optical signal by a frequency de...

DOAJ Open Access (DOAJ)

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Academic Articles & Research Papers

Synthetic Tactile Sensor for Macroscopic Roughness Estimation Based on Spatial-Coding Contact Processing

Contrast Sensitivity Is Associated With Chorioretinal Thickness and Vascular Density of Eyes in Simple Early-Stage High Myopia

Computational Adaptive Optics for HAR Hybrid Trench Array Topography Measurement by Utilizing Coherence Scanning Interferometry

Study of Efficiency Fractal Optical Modulator for insulator material by testing modulation transfer function