Simulation of Optical Hollow Microbottle Resonator for Sensing Applications
AbstractA silica hollow microbottle resonator (HMBR) combined with a pair of curved silicon micro-mirrors on the outside wall of the microbottle is proposed and numerically investigated using the Finite-Difference Time-Domain (FDTD) algorithm. The microbottle has only 32 μm length, 26 μm width and 1.5 μm wall thickness. The curved micro-mirrors overcome the light diffraction loss through light focusing, while the microbottle, in which gas analytes are introduced, provides additional light confinement and hence improves the performance of the sensor. The obtai nedQ-factor is about 4590 at 1543.21 nm and the free sp...
Source: Sensing and Imaging - August 3, 2022 Category: Biomedical Engineering Source Type: research
Motion Capture Sensing Technologies and Techniques: A Sensor Agnostic Approach to Address Wearability Challenges
AbstractBody area sensing systems specifically designed for motion capture need to consider the wearer ’s comfort and wearability criteria. In this paper, after studying body models and their approximation by link-segment models, the kinematics and inverse kinematics problems for determining motion are explored. Different sensor technologies and related motion capture systems are then discussed wit hin the context of wearability and portability challenges of the systems. For such systems, the weight and size of the system need to be kept small and the system should not interfere with the user’s movements. The requireme...
Source: Sensing and Imaging - July 20, 2022 Category: Biomedical Engineering Source Type: research
Correction to: Adaptive Higher ‑Order Spectral Analysis for Image Recovery Under Distortion of Moving Water Surface Using Dragonfly‑Colliding Bodies Optimization
(Source: Sensing and Imaging)
Source: Sensing and Imaging - July 20, 2022 Category: Biomedical Engineering Source Type: research
BI-LSTM Based Encoding and GAN for Text-to-Image Synthesis
AbstractSynthesizing images from text is to produce images with reliable content as specified text depiction that is an extremely demanding task with the most important problems like: content consistency and visual realism. Owing to considerable progression of GAN, it is now possible to produce images with good visual certainty. The translation of text descriptions to images with higher content reliability, on the other hand, is still a work in progress. This paper intends to frame a novel text-to-image synthesis approach, which includes two major phases namely; (1) Text to image encoding and (2) GAN. Initially, during tex...
Source: Sensing and Imaging - July 1, 2022 Category: Biomedical Engineering Source Type: research
Modeling Electrical Resistance Behavior of Soft and Flexible Piezoresistive Sensors Based on Carbon-Black/Silicone Elastomer Composites
AbstractSoft and flexible strain piezoresistive sensors are gaining interest in wearable and robotic applications, but resistance relaxation limits the widespread use of the sensors. As soft, flexible, and stretchable sensors, they can easily be retrofitted into any existing robotic hand. To understand the resistance relaxation of stretchable sensors, three different elastomers were used to fabricate soft piezoresistive sensors. The experimental results showed that the sensor has good linearity and scalability while their resistance is strongly influenced by the stretching speed and modulus of the elastomer. Thus, the Kevi...
Source: Sensing and Imaging - July 1, 2022 Category: Biomedical Engineering Source Type: research
Efficient Multi-focus Image Fusion Using Parameter Adaptive Pulse Coupled Neural Network Based Consistency Verification
AbstractMulti-focus image fusion technique is an important approach to generate a composite image with all objects in focus. Accurate focused pixel detection from multiple source images is crucial for multi-focus image fusion. However, false detection of focused pixels is inevitably due to the low-level image features being usually used to achieve focus pixel classification in most fusion methods. Consistency verification operation is frequently used to revise the falsely detected focused pixels in many fusion schemes. However, most consistency verification strategies cannot achieve the desired results. In this paper, we m...
Source: Sensing and Imaging - June 29, 2022 Category: Biomedical Engineering Source Type: research
Floating Point Implementation of the Improved QRD and OMP for Compressive Sensing Signal Reconstruction
AbstractIn this paper, the Floating-Point Core Architecture based QR decomposition is proposed for solving least square problems in the Orthogonal Matching Pursuit algorithm (OMP-FPCA-QRD). To improve the computational performance of Orthogonal Matching Pursuit (OMP), it is necessary to modify the Orthogonal Matching Pursuit algorithm for analysing a wide range of signals in field programmable gate array (FPGA). As a result, it highly benefits from the available resources and acquires a scalable computational complexity. Since the solution of least square problem involves some iterative parts, like square root and division...
Source: Sensing and Imaging - June 26, 2022 Category: Biomedical Engineering Source Type: research
Adaptive Higher-Order Spectral Analysis for Image Recovery Under Distortion of Moving Water Surface using Dragonfly-Colliding Bodies Optimization
AbstractReconstruction of an underwater object from a sequence of images distorted by moving water waves is a challenging task. Most of the environmental research has been employing image data in recent days. The precision of this research is often dependent on the superiority of image data. In the existing approaches, the problem of analyzing video sequences when the water surface is disturbed by waves. The water waves will affect the appearance of the individual video frames such that no single frame is completely free of geometric distortion. Thus, the image acquisition from the environmental condition is more complex a...
Source: Sensing and Imaging - May 17, 2022 Category: Biomedical Engineering Source Type: research
Electric Resistance Tomograph (ERT): a review as non-destructive Tool (NDT) in deciphering interiors of standing trees
AbstractThe Electric Resistance Tomograph (ERT) is a customized tree specific novel German-technology which was developed to monitor and estimate the tree growth development by looking into the inner structure of the tree to analyse the growth and health status. This technique contributes to detect and study the internal assembly of a tree for the mapping of decay, hollowness, and also to distinguish the sapwood and heartwood demarcation, this way of discovering the internal growth at an early stage, mainly for the timber trees which are economically important can help to regulate thereafter to check whether the growth is ...
Source: Sensing and Imaging - May 11, 2022 Category: Biomedical Engineering Source Type: research
DSSEMFF: A Depthwise Separable Squeeze-and-excitation Based on Multi-feature Fusion for Image Classification
AbstractImage classification refers to the classification of the input image according to some algorithms. The general steps of image classification include image preprocessing, image feature extraction and image classification judgment. Convolutional neural network (CNN) imitates the visual perception mechanism of biology, solves the complicated engineering of traditional manual feature extraction, and realizes automatic feature extraction from data. However, CNN still has the disadvantages of low efficiency and incomplete feature extraction. In this paper, we propose a depthwise separable squeeze-and-excitation based on ...
Source: Sensing and Imaging - May 3, 2022 Category: Biomedical Engineering Source Type: research
A Dynamic Image Encryption Algorithm Based on Improved Ant Colony Walking Path Thought
AbstractAccording to the existing chaotic image encryption technology, this paper designs an algorithm based on the thought of improved ant colony walking path to encrypt the image. In this paper, the key is generated using SHA-512, and the required chaotic sequence is generated using the PWLCM one-dimensional chaotic system. First, the image is scrambled by the row and column indexes by the improved algorithm so that complete the first scrambling. Then, the image is converted into one-dimensional array, and randomly scrambled according to the designed algorithm. Finally, the one-dimensional array is divided into two segme...
Source: Sensing and Imaging - May 3, 2022 Category: Biomedical Engineering Source Type: research
Quality of Experience Evaluation Model with No-Reference VMAF Metric and Deep Spatio-temporal Features of Video
AbstractFor mobile streaming media service providers, it is necessary to accurately predict the quality of experience (QoE) to formulate appropriate resource allocation and service quality optimization strategies. In this paper, a QoE evaluation model is proposed by considering various influencing factors (IFs), including perceptual video quality, video content characteristics, stalling, quality switching and video genre attribute. Firstly, a no-reference video multimethod assessment fusion (VMAF) model is constructed to measure the perceptual quality of the video by the deep bilinear convolutional neural network. Then, th...
Source: Sensing and Imaging - April 18, 2022 Category: Biomedical Engineering Source Type: research
SSRNet: A CT Reconstruction Network Based on Sparse Connection and Weight Sharing for Parameters Reduction
AbstractIn recent years, the neural networks are frequently adopted to address the issues of cone beam CT imaging. However, most of the research so far has been to build neural networks individually either in the image domain or in the projection domain for specific purposes, while the connections between them are not well exploited. A reconstruction network that focuses on the filtering and backward projection process can fully exploit the potential connections between the projection domain and the image domain, and can be plugged into other learned reconstruction models for high-quality results. However, until now most o...
Source: Sensing and Imaging - March 28, 2022 Category: Biomedical Engineering Source Type: research
Optimized Cantilever Sensor Based on Parallel High Dielectric Material
AbstractCantilever is dramatically used as a resonator sensor to detect the presence of a particular molecule or cell in an environment and to measure their amount. Electrostatic force is commonly used to actuate MEMS based cantilevers to resonate because a cantilever has a simple capacitor structure. In this paper, a novel design is proposed to optimize the cantilevers performance by use of high dielectric material in its capacitor structure. The mathematical model of the proposed design and the performance of the cantilever sensor and its quality has been evaluated and reported by finite element simulations in this way. ...
Source: Sensing and Imaging - March 22, 2022 Category: Biomedical Engineering Source Type: research
A Framework for Super Resolution of Color Images with Missing Samples Using Low Rank Approximation
AbstractImages captured from extreme surveillance environments may contain missing pixels because of the damaged sensors and dusty particles including debris from combustion fuels and spider webs. This paper addresses the challenging problem of super resolving color images from low resolution images with missing sample values. In conventional methods, missing pixel estimation and super resolution are carried out separately. Unlike the conventional techniques, the proposed method performs simultaneous missing pixel estimation, super resolution and color reconstruction in a unified framework. The problem is posed in a regula...
Source: Sensing and Imaging - March 16, 2022 Category: Biomedical Engineering Source Type: research
