Multi-Channel Eddy Current Detector Based on Virtual Instrument Technology and Self-Balancing Technology
AbstractIn order to reduce the complexity of software and hardware design in multi-channel eddy current testing, a multi-channel real-time eddy current testing system based on lock-in amplifier technology and self- balancing technology is designed. The system uses graphical programming language platform (LabVIEW), Myrio1900 data acquisition control card and lock-in amplifier as key components. The lock-in amplifier adopts the lock-in technology to detect the amplitude and phase of the weak eddy current signal. The Myrio1900 card outputs multiple analog switch control signals and collects the amplitude component of the weak...
Source: Sensing and Imaging - February 23, 2021 Category: Biomedical Engineering Source Type: research
Multi-Directional Pixel Difference Histogram Analysis Based on Pixel Blocks of Different Sizes
AbstractWu& Tsai ’s one directional pixel value differencing (PVD), and Khodaei& Faez ’s two directional PVD are detected by one directional pixel difference histogram (PDH) analysis.
Researchers proposed three directional PVD using 2 × 2 size blocks, five directional PVD using 2 × 3 or 3 × 2 size pixel blocks, and 8 directional PVD utilizing 3 × 3 size p ixel blocks. These are known as multi-directional PVD (MD PVD) techniques. It has been claimed by researchers that MD PVD is not detected by PDH analysis. This paper proposes a multi-directional PDH (MDPDH) technique which can detect MD...
Source: Sensing and Imaging - February 19, 2021 Category: Biomedical Engineering Source Type: research
Proliferative Diabetic Retinopathy Diagnostic Investigation Using Retinal Blood Vessels Mining Technique
AbstractIn clinical field, wide assortments of utilizations can be managed utilizing image handling. Recognition and screening of retinal sicknesses was one such application in picture preparing. Diabetic retinopathy is an inconvenience of diabetes. The ailment influences veins inside the retina. The retina is a region lying at the rear of the eyeball. In the most punctual phase of the infection, the little veins, or vessels, gotten slenderer, more fragile and inevitably they spill blood. A patient's sight at this stage is still acceptable yet an ophthalmologist can identify and see the irregularities in the retina. As the...
Source: Sensing and Imaging - February 16, 2021 Category: Biomedical Engineering Source Type: research
A Multi-module Medical Image Fusion Method Based on Non-subsampled Shear Wave Transformation and Convolutional Neural Network
AbstractIn order to solve the fusion limitation of single module medical image, a multi-module medical image fusion method based on the non-subsampled shear wave transform (NSST) and convolutional neural network (CNN) is proposed. Firstly, NSST is used to decompose the source image into multi-scale and multi-direction layers to obtain the sub-band coefficients of low frequency and high frequency. Secondly, the low-frequency sub-band coefficients are derived from region energy and variance, and the fusion method based on region feature weight is adopted. The high frequency inner layer sub-band coefficient is firstly calcula...
Source: Sensing and Imaging - February 10, 2021 Category: Biomedical Engineering Source Type: research
Texture Analysis of Tongue Coating in Traditional Chinese Medicine Based on Transfer Learning and Multi-Model Decision
AbstractThe tongue coating texture is one of the basic characteristics of tongue manifestation in traditional Chinese medicine (TCM), which is generally divided into three types: curdy coating, greasy coating, and non-corrosive coating. In this paper, a texture analysis method of tongue coating in TCM is proposed by using transfer learning and multi-model decision. Firstly, tongue coating texture is pre-classified by using the transfer learning strategy to pre-train and fine-tune initial network model trained on large-scale dataset with the tongue coating dataset. Then, the multi-model decision is made by comparing the cla...
Source: Sensing and Imaging - February 10, 2021 Category: Biomedical Engineering Source Type: research
Shadow Image Based Reversible Data Hiding Using Addition and Subtraction Logic on the LSB Planes
AbstractImage steganographic communication demands a fair trade-off among the three diametrically opposed metrics such as higher capacity, larger visual quality, and attack survival ability (ASA). Recently, some reversible data hiding (RDH) techniques using dual images have shown promising results to achieve the aforementioned needs. However, maintaining a balance among these metrics is still an open challenge. In this paper, using the concept of shadow image, which is basically the replica of the cover image (CI) and performing some simple addition and subtraction logic on the shadow image pixels, we propose an improved R...
Source: Sensing and Imaging - February 5, 2021 Category: Biomedical Engineering Source Type: research
Effect of Environmental Conditions on Quality Factors of MEMS Cantilever Beam Resonator in Gas Rarefaction
AbstractThis paper discussed the effect of environmental conditions (moisture and temperature) on the quality factors (Q-factor) of micro-electro-mechanical systems (MEMS) cantilever beam resonators in wide range of gas rarefaction (pressure (p), and accommodation coefficients (ACs)), and flexural mode of resonator. The modified molecular gas lubrication (MMGL) equation is applied for modeling the dominant squeeze film damping (SFD) problem on the quality factor of MEMS cantilever beam resonators to discuss the effect of environmental conditions. The external SFD and the internal structure damping (thermoelastic damping) a...
Source: Sensing and Imaging - January 17, 2021 Category: Biomedical Engineering Source Type: research
Auxiliary Bounding Box Regression for Object Detection in Optical Remote Sensing Imagery
AbstractObject detection in optical remote sensing imagery is being explored to deal with arbitrary orientations and complex appearance which is still a major issue in recent years. To perceive a better solution to the addressed problem, the post-processing of bounding boxes (BBs) has been evaluated and discussed for the applications of object detection. In this paper, the proposed method has divided into two stages; the first stage is based on thresholding of BBs with respect to the confidence values and the second stage is based on the area-based BB regression (BBR). In BBR, the area of each BB was estimated then the ove...
Source: Sensing and Imaging - January 11, 2021 Category: Biomedical Engineering Source Type: research
Local-Friis-Radiation-Pattern ( LFRP ) for Face Recognition
AbstractIn forensic science, various circumstances and requirements give rise to the need for the development of the inter-modality face recognition system to reinforce law and order. In this paper, a novel methodology called Local-Friis-Radiation-Pattern (LFRP) for both homogeneous (visible face images with variations like illumination, pose, and makeup) and heterogeneous (near-infrared (NIR) –visible (VIS) and sketch-photo images) face recognition is proposed. LFRP incorporates the renowned Friis equation of antenna radiation and extends it to image pixels to establish a relation among the pixels residing in a local ne...
Source: Sensing and Imaging - January 4, 2021 Category: Biomedical Engineering Source Type: research
Measurement of Liquid Flow Rate among the Annular Flow in Vertical Tee Junction Using Digital Subtraction Method
AbstractSince the liquid flow rate of the annular flow is closely related to the heat exchange efficiency, it has great significance to measure the liquid flow rate of the annular flow in vertical tee junction. In order to acquire the liquid flow rate of the annular flow in vertical tee junction, a measurement method has been designed, which implements the digital subtraction method to measure the thickness of the liquid film under the visible light and to apply the image feature matching algorithm to obtain the liquid velocity field. Moreover, the accuracy of the liquid film velocity field as well as the spatial and tempo...
Source: Sensing and Imaging - January 4, 2021 Category: Biomedical Engineering Source Type: research
Cerebral Hemorrhage Recognition Based on Mask R-CNN Network
AbstractThis paper presents a method to identify cerebral hemorrhage on CT images aiming at providing support for diagnosis. Firstly, we use Mask R-CNN network to segment the brain parenchyma area. Secondly, we use threshold segmentation algorithm to locate the blood clot area. At last, a 3D visualization method of cerebral hemorrhage is built by cross-sectional contours interpolation. In terms of detection accuracy, 294 brain CT image sets are sampled, which included 113 of healthy brains and 181 of intracranial hematoma. We divided the above 294 samples into two categories, one with cerebral hemorrhage symptoms, and the ...
Source: Sensing and Imaging - January 4, 2021 Category: Biomedical Engineering Source Type: research
Human Identification with Dental Panoramic Images Based on Deep Learning
AbstractHuman identification by means of dental panoramic X-ray images has been achieved due to end-to-end deep learning using a convolutional neural network. This paper proposes a novel attention-based multi-supervision network (AMNet) for human identification. AMNet includes an attention-based supervision mechanism to obtain an accurate attention mask, feature fusion branches to combine multilevel global features, and part feature branches to obtain discriminative local features. After extracting features of dental panoramic X-ray images, matching scores between the gallery and query features are calculated with cosine s...
Source: Sensing and Imaging - January 4, 2021 Category: Biomedical Engineering Source Type: research
Enhanced Performance of Spiral Co-planar Inter-Digital Capacitive Structures for Sensing Applications
AbstractIn this work we consider a Spiral Inter-Digital Capacitive (SIDC) structure for its optimum design and performance analysis based on finite element simulation, for possible application as sensors.
The effects of relevant geometrical parameters like sensor electrode width, inter-electrode gap, number of electrode pairs and electrode height on sensor output capacitance are evaluated and analyzed. In addition, influence of a test sample over the designed sensor for varying lift-off distances from the top of the sensor surface and for various material permittivity values are investigated. Results of the studies show...
Source: Sensing and Imaging - November 11, 2020 Category: Biomedical Engineering Source Type: research
Development of a Numeric Method to Validate the Reliability Improvement of Safety Critical Valves During Operation Through Online Monitoring Implementation
AbstractOnline valve monitoring, also called “ValveWatch,” is a state-of-the-art method for improving the reliability of safety critical valves during operation. This well-known method has been used for almost two decades to reveal the possible failures of valves, actuators and control systems. This paper reviews some of the existing liter ature about ValveWatch technology to provide more detailed information about this online monitoring approach and its benefits. The possible causes and effects of failures associated with safety critical valves based on the existing literature are identified and summarized in this pap...
Source: Sensing and Imaging - November 10, 2020 Category: Biomedical Engineering Source Type: research
Application of Polarimetric-SAR Decompositions on RADARSAT-2 Fine Quad-Pol Images to Enhance the Performances of Ships Detection Algorithms
AbstractRemote sensing of vessels is an important tool for ship safety and security at sea. In this work, we are interested in improving ships detection using polarimetric Synthetic Aperture Radar (SAR). To develop the appropriate method, different processing techniques are applied on Pol-SAR images such as fusion and polarimetric decompositions and we use adaptive threshold detectors to assess the performances of the processing techniques. The data exploited in this work were acquired on a port area of the city of Vancouver by using RADARSAT-2 satellite. In this paper it is shown first that when exploiting single polariza...
Source: Sensing and Imaging - November 6, 2020 Category: Biomedical Engineering Source Type: research
