Results 21 to 30 of about 12,743 (257)

Vehicles Speed Estimation Model from Video Streams for Automatic Traffic Flow Analysis Systems

JOIV: International Journal on Informatics Visualization, 2023
Image and video processing have been widely used to provide traffic parameters, which will be used to improve certain areas of traffic operations. This research aims to develop a model for estimating vehicle speed from video streams to support traffic ...
Maizatul Najihah Arriffin, Salama A. Mostafa, Umar Farooq Khattak, Mustafa Musa Jaber, Zirawani Baharum, - Defni, Taufik Gusman   +6 more
doaj   +1 more source

Vectorisation of Sketches with Shadows and Shading using COSFIRE filters [PDF]

Proceedings of the ACM Symposium on Document Engineering 2018, 2018
Engineering design makes use of freehand sketches to communicate ideas, allowing designers to externalise form concepts quickly and naturally. Such sketches serve as working documents which demonstrate the evolution of the design process. For the product design to progress, however, these sketches are often redrawn using computer-aided design tools to ...
Alexandra Bonnici, Dorian Bugeja, George Azzopardi   +2 more
openaire   +1 more source

Low-Cost PVD Shadow Masks with Submillimeter Resolution from Laser-Cut Paper

Micromachines, 2020
We characterize an affordable method of producing stencils for submillimeter physical vapor deposition (PVD) by using paper and a benchtop laser cutter. Patterning electrodes or similar features on top of organic or biological substrates is generally not
Farzad Elhami Nik, Isabelle Matthiesen, Anna Herland, Thomas E. Winkler   +3 more
doaj   +1 more source

Feature improvement for classification of face images under varying light conditions using a hybird algorithm [PDF]

Warasan Witthayasat Lae Theknoloyi Mahawitthayalai Mahasarakham, 2020
Image improvement is an important process for enhancing the quality of facial images under varying light condition in which shadow and light affects the performance of feature extraction and face recognition.
Witas Jaturongkorn
doaj  

Improvement and Validation of NASA/MODIS NRT Global Flood Mapping

Remote Sensing, 2019
The remote-sensing based Flood Crop Loss Assessment Service System (RF-CLASS) is a web service based system developed and managed by the Center for Spatial Information Science and Systems (CSISS).
Li Lin, Liping Di, Junmei Tang, Eugene Yu, Chen Zhang, Md. Shahinoor Rahman, Ranjay Shrestha, Lingjun Kang   +7 more
doaj   +1 more source

Axis-aligned filtering for interactive sampled soft shadows [PDF]

ACM Transactions on Graphics, 2012
We develop a simple and efficient method for soft shadows from planar area light sources, based on explicit occlusion calculation by raytracing, followed by adaptive image-space filtering. Since the method is based on Monte Carlo sampling, it is accurate.
Soham Uday Mehta, Brandon Wang, Ravi Ramamoorthi   +2 more
openaire   +1 more source

Design of Shadow Filter Using Low-Voltage Multiple-Input Operational Transconductance Amplifiers

Applied Sciences
This paper introduces shadow filters that employ multiple-input operational transconductance amplifiers (MI-OTAs) as the active component. Two configurations of shadow filters are proposed.
Montree Kumngern, Fabian Khateb, Tomasz Kulej, Natchayathorn Wattikornsirikul   +3 more
doaj   +1 more source

A 42.5 nW, 0.5 V Differential Difference Transconductance Amplifier and Its Application in Low-Power Universal Shadow Filter

IEEE Access
This paper presents new low-power universal shadow filters based on an enhanced CMOS structure utilizing multiple-input differential difference current transconductance amplifiers (MI-DDTAs).
Montree Kumngern, Fabian Khateb, Tomasz Kulej, Daniel Arbet   +3 more
doaj   +1 more source

Shadow Information Spaces: Combinatorial Filters for Tracking Targets [PDF]

IEEE Transactions on Robotics, 2012
This paper introduces and solves a problem of maintaining the distribution of hidden targets that move outside the field of view while a sensor sweep is being performed, resulting in a generalization of the sensing aspect of visibility-based pursuit-evasion games. Our solution first applies information space concepts to significantly reduce the general
Jingjin Yu, Steven M. LaValle
openaire   +1 more source

Shadow filters – new family of second-order filters

Electronics Letters, 2010
A new family of second-order filters is introduced. When an external voltage amplifier is added to a second-order filter cell (passive or active), the characteristic frequency of the resulting filter can then be modified by acting only on the value of the gain of this amplifier. All the properties of these new filters are examined.
Y. Lakys, A. Fabre
openaire   +1 more source