Searched for: image sensor
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Kramer, O.J.I. (author)
In drinking water treatment plants, multiphase flows are a frequent phenomenon. Examples of such flows are pellet-softening and filter backwashing where liquid-solid fluidisation is applied. A better grasp of these fluidisation processes is needed to be able to determine optimal hydraulic states. In this research, models were developed, and...
doctoral thesis 2021
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Shao, Y. (author)
In this thesis we try to provide novel solutions to key problems related to imaging and imaging system. Imaging is usually referred to as the technique for reproducing the information of the object. In optics, we usually refer the object information to the light field in the object plane due to the interaction of the illumination field and the...
doctoral thesis 2021
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Piscaer, P.J. (author)
Phase aberrations in optical systems,which occur in various applications such as astronomy, microscopy and ophthalmology, degrade the quality of obtained images. The exact cause and nature of the aberrations depends on the application. In astronomy, turbulence within the Earth’s atmosphere creates fluctuations of the refractive index, leading to...
doctoral thesis 2021
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Ziliotto Salamon, N. (author)
Post­processing has become a major component in movie and image production. This step is no longer a simple cleanup and cutting step, but it involves important manipulations that contribute to the atmosphere of a movie and the perception of a still image. Several movie studios spend a great part of their budget on it, as managing the post...
doctoral thesis 2021
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Kazasidis, O. (author)
Fast adaptive optics and comparatively slower active optics are cornerstones of modern-day astronomy. Such systems are installed on most current large ground-based observatories in the visible or infrared and are included in the design of all future observatories. Their role is twofold; first, to compensate for astronomical seeing, and second,...
doctoral thesis 2021
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Piscaer, P.J. (author), Soloviev, O.A. (author), Verhaegen, M.H.G. (author)
This paper presents a computationally efficient framework in which a single focal-plane image is used to obtain a high-resolution reconstruction of dynamic aberrations. Assuming small-phase aberrations, a non-linear Kalman filter implementation is developed whose computational complexity scales close to linearly with the number of pixels of...
journal article 2021
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de Jong, Richard J. (author), de Wit, Jacco J.M. (author), Uysal, Faruk (author)
In the defence and security domain, camera systems are widely used for surveillance. The major advantage of using camera systems for surveillance is that they provide high‐resolution imagery, which is easy to interpret. However, the use of camera systems and optical imagery has some drawbacks, especially for application in the military domain....
journal article 2021
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Stokkermans, T.C.A. (author), Usai, D. (author), Sinnige, T. (author), Veldhuis, L.L.M. (author)
Many electric vertical takeoff and landing concepts are characterized by nontraditional vehicle layouts with distributed propellers. Two propeller interaction types were distinguished in this Paper, which investigates how propeller interaction in side-by-side and one-after-another configuration affects performance, in terms of thrust, power, in...
journal article 2021
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Theuwissen, A.J.P.A.M. (author)
One of the fastest growing markets in the semiconductor industry is being driven by businesses in the solid-state imaging sector. An overview of the world-wide CIS (CMOS Image Sensor) market is illustrated in Figure 1.4.1. The actual CAGR (compound annual growth rate) from 2010 until 2019 was 15.2% in units and 16.9% in sales, while the...
conference paper 2021
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Jung, Kyunghoon (author), Abobeih, M.H.M.A. (author), Yun, Jiwon (author), Kim, Gyeonghun (author), Oh, Hyunseok (author), Henry, Ang (author), Taminiau, T.H. (author), Kim, Dohun (author)
The detection of nuclear spins using individual electron spins has enabled diverse opportunities in quantum sensing and quantum information processing. Proof-of-principle experiments have demonstrated atomic-scale imaging of nuclear-spin samples and controlled multi-qubit registers. However, to image more complex samples and to realize larger...
journal article 2021
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Gottwald, Lukas M. (author), Blanken, Carmen P.S. (author), Silva Canaveira Tourais, J.L. (author), Smink, Jouke (author), Planken, R. Nils (author), Boekholdt, S. Matthijs (author), Meijboom, Lilian J. (author), Coolen, Bram F. (author), Strijkers, Gustav J. (author)
Background: Respiratory gating is generally recommended in 4D flow MRI of the heart to avoid blurring and motion artifacts. Recently, a novel automated contact-less camera-based respiratory motion sensor has been introduced. Purpose: To compare camera-based respiratory gating (CAM) with liver-lung-navigator-based gating (NAV) and no gating ...
journal article 2021
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Romijn, J. (author), Vollebregt, S. (author), van Zeijl, H.W. (author), Zhang, Kouchi (author), Leijtens, Johan (author), Sarro, Pasqualina M (author)
In this paper we present a sun position sensor platform with a scalable approach for the 3D integration of the sensor optics. This would facilitate the sun position sensor miniaturization, reduces fabrication cost and mitigates the need for sensor calibration. The sun position sensor platform is implemented in a seven mask BICMOS technology with...
conference paper 2021
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Meister, S. (author), Möller, Nantwin (author), Stüve, Jan (author), Groves, R.M. (author)
In the aerospace industry, the Automated Fiber Placement process is an established method for producing composite parts. Nowadays the required visual inspection, subsequent to this process, typically takes up to 50% of the total manufacturing time and the inspection quality strongly depends on the inspector. A Deep Learning based...
journal article 2021
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van der Graaff, L. (author)
This thesis explores a novel optical architecture for Whole Slide Imaging (WSI). This new architecture allows for multi-focal (3D) image acquisitions in a single scan pass. The multi-focal imaging capability is used to demonstrate 3D phase imaging and 3D imaging of thick tissue sections on a prototype scanner. Further, instrumentation for the...
doctoral thesis 2020
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Abarca Prouza, A.N. (author), Theuwissen, A.J.P.A.M. (author)
This article presents in-pixel (of a CMOS image sensor (CIS) temperature sensors with improved accuracy in the spatial and the temporal domain. The goal of the temperature sensors is to be used to compensate for dark (current) fixed pattern noise (FPN) during the exposure of the CIS. The temperature sensors are based on substrate parasitic...
journal article 2020
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Agbana, T.E. (author)
Malaria remains an important cause of high morbidity and mortality worldwide. According to World Health Organisation (WHO) malaria report for 2017, malaria accounted for the death of 435,000 people. It is the leading cause of death among pregnant women and little children. 11% of maternal and 20% of under–five deaths are attributed to malaria...
doctoral thesis 2020
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Xu, S. (author)
As one of the main sensor in autonomous driving, radar has great advantages over other sensors, especially its capabilities during adverse weather condition and Doppler information extraction. Performance of the radar in terms of accuracy and target resolution strongly depends on radar waveforms transmitted and signal processing algorithms...
doctoral thesis 2020
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Xie, S. (author), Theuwissen, A.J.P. (author)
This paper presents a CMOS image sensor (CIS) with a zoom ADC, to quantize in-pixel temperature sensors, as well as for faster readout speed of the image pixels while maintaining low quantization noise. The proposed 15 bit zoom ADC has a 4 bit Unit Capacitor Array (UCA) SAR and a 13 bit incremental 2<sup>nd</sup>-order delta-sigma ADC (DSADC)...
journal article 2020
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Xie, S. (author), Theuwissen, A.J.P. (author)
This brief proposes a successive approximation register (SAR) analog-to-digital converter (ADC) whose readout speed is improved by 33%, through applying a digital error correction (DEC) method, compared to an alternative without using the DEC technique. The proposed addition-only DEC alleviates the ADC's incomplete settling errors, hence...
journal article 2020
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van der Meulen, P.Q. (author), Kruizinga, P. (author), Bosch, Johannes G. (author), Leus, G.J.T. (author)
We study the design of a coding mask for pulse-echo ultrasound imaging. We are interested in the scenario of a single receiving transducer with an aberrating layer, or ‘mask,’ in front of the transducer's receive surface, with a separate co-located transmit transducer. The mask encodes spatial measurements into a single output signal, containing...
journal article 2020
Searched for: image sensor
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