A5059516736- Optical Imaging and Spectroscopy Techniques
- Random lasers and scattering media
- Advanced Fluorescence Microscopy Techniques
- Orbital Angular Momentum in Optics
- Remote-Sensing Image Classification
- Advanced Optical Sensing Technologies
- Cell Image Analysis Techniques
- Remote Sensing in Agriculture
- Remote Sensing and Land Use
- Infrared Thermography in Medicine
- Near-Field Optical Microscopy
- Optical Coherence Tomography Applications
- Photoacoustic and Ultrasonic Imaging
- Optical Polarization and Ellipsometry
- Image Processing Techniques and Applications
- Photonic and Optical Devices
- Tropical and Extratropical Cyclones Research
- Digital Holography and Microscopy
- Thermoregulation and physiological responses
- Ocean Waves and Remote Sensing
- Adaptive optics and wavefront sensing
- Ultrasound Imaging and Elastography
- CCD and CMOS Imaging Sensors
- AI in cancer detection
- Electrowetting and Microfluidic Technologies
University of Glasgow
2021-2023
Cranfield University
2016-2020
Defence Academy of the United Kingdom
2016-2020
Indian Institute of Remote Sensing
2014
Solving challenges of enhanced imaging (resolution or speed) is a continuously changing frontier research. Within this sphere, ghost (and the closely related single-pixel imaging) has evolved as an alternative to focal plane detector arrays owing advances in detectors and/or modulation devices. The interest these techniques due their robustness varied sets patterns and applicability broad range wavelengths compatibility with compressive sensing. To achieve better control illumination...
Coastal regions are highly vulnerable to rising sea levels due global warming. Previous Intergovernmental Panel on Climate Change (2013) predictions of 26 82 cm level rise now considered conservative. Subsequent investigations predict much higher which would displace 10% the world's population living less than 10 m above level. Remote sensing and GIS technologies form mainstay models coastal retreat inundation future sea-level rise. This study estimates varying trends along Krishna–Godavari...
Abstract. Hyperspectral data finds applications in the domain of remote sensing. However, with increase amounts information and advantages associated, come "curse" dimensionality additional computational load. The question most often remains as to which subset best represents imagery. present work is an attempt establish entropy, a statistical measure for quantifying uncertainty, formidable determining optimal number principal components (PCs) improved identification land cover classes....
Hyperspectral remote sensing's ability to capture spectral information of targets in very narrow bandwidths gives rise many intrinsic applications. However, the major limiting disadvantage its applicability is dimensionality, known as Hughes Phenomenon. Traditional classification and image processing approaches fail process data along contiguous bands due inadequate training samples. Another challenge successful deal with real world scenario mixed pixels i.e. presence more than one class...
Abstract Human skin equivalents (HSEs) are three‐dimensional living models of human that prepared in vitro by seeding cells onto an appropriate scaffold. They recreate the structure and biological behaviour real skin, allowing investigation processes such as keratinocyte differentiation interactions between dermal epidermal layers. However, for wider applications, their optical mechanical properties should also replicate those skin. We therefore conducted a pilot study to investigate HSEs....
Single-pixel imaging techniques as an alternative to focal-plane detector arrays are being widely investigated. The interest in these single-pixel is partly their compatibility with compressed sensing but also applicability spectral regions where focal planes simply not obtainable. Here, we show how a phased-array modulator source can be used create Hadamard intensity patterns the far-field, thereby enabling imaging. Further, successfully illustrate implementation of for image reconstruction...
Currently, diagnostic medicine uses a multitude of tools ranging from ionising radiation to histology analysis. With advances in piezoelectric crystal technology, high-frequency ultrasound imaging has developed achieve comparatively high resolution without the drawbacks radiation. This research proposes low-cost, non-invasive and real-time protocol for informing photo-therapy procedures using imaging. We combine currently available with Monte Carlo methods assessing light transport...
While transmission electron microscopes (TEM) can achieve a much higher resolution than optical microscopes, they face challenges of damage to samples during the high energy processes involved. Here, we explore using computational ghost imaging techniques in microscopy reduce total required intensity. The technological lack equivalent high-resolution, spatial light modulator for electrons means that different approach needs be pursued. To this end, show beam shaping technique based on use...
Coastal regions, especially river deltas are highly resourceful and hence densely populated; but these extremely low-lying lands vulnerable to rising sea levels due global warming threatening the life property in regions. Recent IPCC (2013) predictions of 26-82cm level rise now considered conservative as subsequent investigations such by Met Office, UK indicated a vertical about 190cm, which would displace 10% world's population living within 10 meters above level. Therefore, predictive...
Modular light (ModLight) sources can be integrated into complex systems for microscopy, medical imaging, remote sensing, and many more. Motivated by the need affordable open-access alternatives that are globally relevant, we have designed presented devices use simple, off-the-shelf components. Red, green, blue, white near-infrared LEDs combined using mirrors X-Cube prisms in novel devices. This modular nature allows portability mounting flexibility. The ModLight suite used with any optical...
Current standards for diagnosing and monitoring anemia are relatively invasive. The superficial symptoms of this condition due to an underlying deficiency red blood cells (RBC) or erythrocytes, hemoglobin in the blood. This results inadequate supply oxygen body's tissues. For point-of-care diagnostic systems, remote determination conditions will depend on understanding interaction light with hemoglobin. However, skin acts as first barrier detection. In study, we pursue possibility detecting...
Christian Kuttner opened a general discussion of the paper by Pete Vukusic: You have pointed out differences between ordered, quasi-ordered and disordered systems. But how does this relate to short- long-range order? For example, some densely packed arrangements may very unifor
Today's diagnostics include devices such as pulse oximeters, blood pressure monitors, and temperature measurements. These provide vital information to medical personnel when making treatment decisions. Drawing inspiration from the fundamental utility of we present a methodology for robust low-cost approach imaging subsurface vasculature monitoring heart rate. The uses off-the-shelf equipment, set up in free space without physical contact exploits nature interaction between light at...
Alternatives to focal-plane detector arrays have emerged in recent years and are now being widely investigated. One of the most promising these single-pixel imaging techniques. Single-pixel techniques recreate a scene using knowledge projected patterns measured backscattered signals. This research investigates implications idealised patterns, Fourier-transformed camera-captured generated by plane wave decomposition methods. Hadamard into far-field phased-array modulator source used for...
Abstract Transmission electron microscopes (TEM) achieve high resolution imaging by raster scanning a focused beam of electrons over the sample and measuring transmission to form an image. While TEM can much higher than optical microscopes, they face challenges damage samples during energy processes involved. Here, we explore possibility applying computational ghost techniques adapted from regime reduce total, required illumination intensity. The technological lack equivalent...
Plasmodium spp. are the protozoan parasites responsible for malaria. synthesise a biocrystal, hemozoin, which can be observed under cross-polarised light. These birefringent crystals seen due to different refractive indices of hemozoin crystal and red blood cells. Here, we present polarised light modular microscopy (Pol-ModMicro) solution, complete with illumination sources robust imaging system capture birefringence identify parasites. We achieve this by combining ModLight bespoke...
We present an assessment of photon transport through healthy and hypertensive tissue models using Monte Carlo methods. The (including skin layers blood vessels) are assessed under red wavelength illumination in TracePro.
Biophotonics is becoming increasingly prominent in value and visibility. What was predominantly an advanced field of research now being included undergraduate postgraduate programmes. To increase biophotonics-related STEM awareness, we developed a simple demonstration kit using LEDs camera that allows visualising the blood vessels beneath skin (specifically fingers). The uses inexpensive blue, green, red near-infrared to show absorption shorter wavelengths transmission longer skin. As...
Abstract Fluorescence microscopy is a well-known technique for studying biological samples. However, on global scale, techniques (beyond brightfield imaging) are inaccessible in some countries. Additionally, proprietary hardware not modular and cannot be adapted different architectures. In this research, we demonstrate epifluorescence system image analysis developed with the motivation of achieving high-resolution imaging using low-cost hardware. We compare performance (1000 GBP)...
Poster presented at the 2018 Defence and Security Doctoral Symposium.Due to non-contact non-invasive nature, ease of investigation, photonics imaging have emerged as a preferred modality in multitude domains. Investigation medical conditions problems utilising these tools is highly sought after domain research innovation due impact it would improving quality care for patients while reducing workload staff. In our research, we consider simulations light transport subsequently study...
The spectral resolution of a spectrograph depends on the input slit width, diffraction grating grooves and number imaging sensor/detector pixels. Due to proprietary nature designs, recalibration by end-users can be challenging. Most calibration procedures currently published are applicable in-house instruments or spectrographs with access internal specifications. Narrowing improves but also reduces throughput system. We attempted recalibrate an Offner-based using larger detector plane (an...
Dimensionality is one of the greatest challenges when deciphering hyperspectral imaging data. Although multiband nature data beneficial, algorithms are faced with a high computational load and statistical incompatibility due to insufficient number training samples. This hurdle downstream applications. The combination dimensionality real-world scenario mixed pixels makes identification classification challenging. Here, we address complications using specific spectral indices from band...