Researchers in physics and physical chemistry from the University of Southampton credit ArrayFire in a scientific report for its help in drastically reducing computation time of linear algebra, vectored mathematical operations, and fast Fourier transforms (FFT). The report examines high-energy laser pulse self-compression in short gas-filled fibers. Research Abstract From the article in Physical Review, the following abstract summarizes the research: We examine the spatio-temporal compression of energetic femtosecond laser pules within short gas-filled fibers. The study is undertaken using an advanced nonlinear pulse propagation model based on a multimode generalized nonlinear Schr ̈odinger equation that has been modified to include plasma effects. Plasma defocusing and linear propagation effects are shown to be the dominant processes within a highly dynamical …
Real-time Quantitative Phase Imaging of Red Blood Cells with ArrayFire
Researchers from the College of Optical Science and Engineering of Zhejiang University and the Department of Ophthalmology of Stanford University published a scientific report using ArrayFire to perform quantitative phase imaging in real-time with example results tracking red blood cell dynamics. Research Abstract From the article in Nature, the following abstract summarizes the research: Real-time quantitative phase imaging has tremendous potential in investigating live biological specimens in vitro. Here we report on a wideband sensitivity-enhanced interferometric microscopy for quantitative phase imaging in real-time by employing two quadriwave lateral shearing interferometers based on randomly encoded hybrid gratings with different lateral shears. A theoretical framework to analyze the measurement sensitivity is firstly proposed, from which the optimal lateral shear pair for sensitivity …
Identifying Defects in Bragg Coherent Diffractive Imaging with ArrayFire
Researchers from the Materials Science Division of Argonne National Laboratory published a scientific report using ArrayFire to identify defects in Bragg coherent diffractive imaging (BCDI). From the article in Nature, the following abstract summarizes the research: Crystallographic defects such as dislocations can significantly alter material properties and functionality. However, imaging these imperfections during operation remains challenging due to the short length scales involved and the reactive environments of interest. BCDI has emerged as a powerful tool capable of identifying dislocations, twin domains, and other defects in 3D detail with nanometer spatial resolution within nanocrystals and grains in reactive environments. However, BCDI relies on phase retrieval algorithms that can fail to accurately reconstruct the defect network. Here, numerical simulations are used …
Transcranial High-Intensity Focused Ultrasound Therapies with ArrayFire
Researchers from the University of Utah recently used ArrayFire to publish results on a full-wave phase aberration correction method for transcranial high-intensity ultrasound therapies. From the Journal of Therapeutic Ultrasound, the following abstract summarizes the research: Background Non-invasive high-intensity focused ultrasound (HIFU) can be used to treat a variety of disorders, including those in the brain. However, the differences in acoustic properties between the skull and the surrounding soft tissue cause aberrations in the path of the ultrasonic beam, hindering or preventing treatment. Methods The paper presents a method for correcting these aberrations that is fast, full-wave, and allows for corrections at multiple treatment locations. The method is simulation-based: an acoustic model is built based on high-resolution CT scans, and …
Dissipative Dynamics at Conical Intersections
Researchers from Nanyang Technological University in Singapore presented results from simulations achieved with ArrayFire in the Faraday Discussions journal of The Royal Society of Chemistry. The simulations model the effects of a dissipative environment on the ultrafast vibronic couplings at conical intersections. In this post, we first define these terms to gain understanding. Subsequently, we provide a summary of this research and the utility provided by ArrayFire in the simulation framework. Defining Terms Dissipative Environment (ref1, ref2) A dissipative system is a thermodynamically open system that is operating out of, and often far from, thermodynamic equilibrium in an environment with which it exchanges energy and matter. A tornado may be thought of as a dissipative system. Dissipative systems stand in …
ArrayFire v3.8.1 Release
We are excited to share the v3.8.1 bugfix release of ArrayFire! In this post, we share an overview of the changes to ArrayFire in its 3.8.1 bugfix release. The binaries and source code can be downloaded from these locations: Official installers GitHub repository Official APT repository The bugfix release consists mainly of overall improvements to the ArrayFire 3.8 codebase as well as bugfixes. Improvements As always, a number of improvements have been made to all backends. We continue to clean up the codebase and update the library to support newer frameworks. In addition to general maintenance and bookkeeping, the following improvements have been added: moddims now uses JIT approach for certain special cases JIT Performance Optimization Improved readability of log …
Dynamical Properties of a Nonlinear Growth Equation with ArrayFire
Researchers at the Université de Picardie Jules Verne in France and the University of Miskolc in Hungary use ArrayFire in the analysis and study of the dynamical properties of a nonlinear growth equation, as described in this paper. Oftentimes, technical computing problems are simply intractable on CPUs and bigger devices like GPUs are required in order to get the job done. In this case, ArrayFire was an easy-to-use option for these researchers to build and analyze math quickly and efficiently on the GPU. From their abstract: “The conserved Kuramoto-Sivashinsky equation is considered as the evolution equation of amorphous thin film growth in one- and in two-dimensions. The role of the nonlinear term and the properties of the solutions are investigated …
Synthetic Aperture Radar on the Jetson TX1
Researchers at Peter the Great St. Petersburg Polytechnic University have implemented a synthetic aperture radar processing on the Jetson TX1 Platform using ArrayFire as described in this paper. The paper introduces SAR as “a remote sensing technique producing high-resolution radar images of the Earth’s surface. SAR technology allows obtaining wide swath radar images of objects at a considerable distance regardless of the weather and lighting conditions. It can be used by unmanned aerial vehicles and space satellites. Thus, SAR technology allows solving various problems, such as: detecting small objects (vehicles, airplanes, ships), assessing the state of railways, airfields, seaports, mapping an area, assisting in geological exploration, mapping vegetation, detecting oil spills and pollution as well as many other tasks.” The …
CUDA Computing on Google Colab with ArrayFire
For the first-time in our 14 year existence, we are now able to provide our community with the ability to run ArrayFire programs for free within minutes. Before today, users would have to download and install the library on their own systems, which can be a hassle if you just want to play around with some code and benchmarks. Today, we’re excited to announce that ArrayFire is available on Google Colab, the free GPU computing cloud service from Google. Colaboratory, or “Colab” for short, allows you to write and execute Python in your browser, with Zero configuration required, free access to GPUs, and easy sharing. You can jump right in and start playing with this new tool: Click Here to …
Finger Vein Identity Recognition in “Negligible Time” using ArrayFire
In this blog post, we summarize work by researchers in Slovakia using ArrayFire to develop OpenFinger, a finger vein identity recognition library. Finger prints and finger veins can be used as a biometric for identity recognition. The physical setup of their sensor system is the following collection of CMOS sensors scattering light to a near infrared LED that projects the image to a CCD camera for capture to a computer. The computing infrastructure used in this work consists of the following components. Several great open source libraries are used, including OpenCV, Caffe, Qt, and ArrayFire. ArrayFire is specifically used in pre-processing to accelerate Gabor filtering on the GPU. Gabor filter has proven itself as one of the most suitable techniques …