In this work, we leverage graphene's unique tunable Seebeck coefficient for the demonstration of a graphene-based thermal imaging system. By integrating graphene based photothermo-electric detectors with micromachined silicon nitride membranes, we are able to achieve room temperature responsivities on the order of ~7-9 V/W (at λ = 10.6 μm), with a time constant of ~23 ms. The large responsiviti...

Image processing techniques were used to enhance the recorded thermal images and to remove unwanted noise. The skin surface area centered on the tip of the face was specified by a square that covered the region using Haarlike feature method. The face is detected and then tracked. The camera adjusts its pan and tilt continuously to capture the face at center location of display screen. Experimen...

Foreground  background segmentation is the primary step of most automated video monitoring system aiming at object tracking, event detection or scene interpretation. In uncontrolled environments, with dynamic background and lighting changes, this basic task is very challenging. This work is based on the hypothesis that the combination of LWIR (8-12 m) and colour cameras can significantly impr...

This paper examines uniqueness and stability results for an inverse problem in thermal imaging. The goal is to identify an unknown boundary of an object by applying a heat flux and measuring the induced temperature on the boundary of the sample. The problem is studied in both the case in which one has data at every point on the boundary of the region and the case in which only finitely many mea...

Pyroelectric targets for thermal television can have broad spectral bandwidth, fast response to chopped signals and can operate uncooled. Analysis shows that targets of triglycine sulphate (TGS) are capable of good spatial resolution and high responsivity in practical thicknesses. The noise sources and constraints for electron beam readout in both cathode-potential and anode-potential stabilize...

For years, scientists have used thermal broadband cameras to perform target characterization in the longwave (LWIR, 812 m) and midwave (MWIR, 3-5 m) infrared. The analysis of broadband imaging sequences typically provides energy, morphological and/or spatiotemporal information. However, there is very little information about the chemical nature of the investigated targets when using such syst...

Thermal imaging with an infrared camera can be used to view the location and intensity of heat sources in space and time. In a thermal conductor, thermal diffusion blurs out those heat sources. Knowledge of the physics of thermal diffusion can be used to enhance the spatial and temporal resolution of thermal images. In two dimensions, quantitative reconstruction of the heat source intensity is ...