A Digital signal processor based development platform for thermal imagers

Özkan, Mustafa
The performance of thermal imaging systems depends on the sophistication level of the signal processing algorithms and the careful design of the required electronics. Digital Signal Processor (DSP) boards are very beneficial in designing such systems, and applying high level signal processing algorithms. The aim of this study is to design and implement a development platform for thermal imagers using a double floating point processor DSP board.A front-end electronics board has been employed as the interface between the detector read-out integrated circuit (ROIC) and the DSP board. The output of the front-end electronics board is fed to the DSP board, which captures the 12-bit digital data and applies the basic signal processing algorithms to the raw image data. Capturing and signal processing software is constructed using the C programming language and loaded to the DSP with the compiler called Code Composer Studio. An image formation program is written with the functions of OpenGL graphics programming language in Visual C/C++ compiler. The implemented system is tested with a highly nonuniform 128x128 InSb detector array on Si substrate, and successful performance is achieved in real time. The system can work with detector arrays up to a format of 320x256 at 25 Hz frame rate. Higher formats and frame rates are possible, if the delays in the front-end electronics board are reduced through the use of higher speed components in this board.


A multiscale analytical correction technique for two-dimensional thermal models of AlGaN/GaN HEMTs
Azarifar, Mohammad; Donmezer, Nazli (2017-07-01)
Two-dimensional approaches are widely used in the numerical thermal models of AlGaN/GaN high electron mobility transistors (HEMTs) to reduce the high computational cost of the three-dimensional approaches. The aforementioned simplified models predict inaccurate device temperatures with significant overestimation of the thermal resistance. In order to take advantage of the computational efficiency of the two-dimensional models, a correction procedure is necessary for the accurate representation of the actual...
SOYDAN, HİLAL; DÜZGÜN, HAFİZE ŞEBNEM; Alatan, Abdullah Aydın (2016-07-15)
Archaeological studies using computer vision based analysis methods on thermal imageries mainly lack an important stage of pointwise detection of artifact positions, which is needed for the automation of the system in a generic application. In this paper, we propose a pointwise detection method working in the thermal range of hyperspectral band for archaeological artifacts. The proposed method first optimally converts a given 3D hyperspectral image of the searched scene into a 2D brightness-temperature map ...
An 80x80 Microbolometer Type Thermal Imaging Sensor using the LWIR-Band CMOS Infrared (CIR) Technology
Tankut, Firat; Cologlu, Mustafa H.; Askar, Hidir; Ozturk, Hande; Dumanli, Hilal K.; Oruc, Feyza; Tilkioglu, Bilge; Ugur, Beril; Akar, Orhan Sevket; Tepegoz, Murat; Akın, Tayfun (2017-04-13)
This paper introduces an 80x80 microbolometer array with a 35 mu m pixel pitch operating in the 8-12 aem wavelength range, where the detector is fabricated with the LWIR-band CMOS infrared technology, shortly named as CIR, which is a novel microbolometer implementation technique developed to reduce the detector cost in order to enable the use of microbolometer type sensors in high volume markets, such as the consumer market and IoT. Unlike the widely used conventional surface micromachined microbolometer ap...
An Advanced Presence Detection System Using the CMOS Infrared (CIR) Technology
Arslan, Tugay; Cilbir, Gorkem; Tepegoz, Murat; Akın, Tayfun (2017-04-13)
This paper presents the development of advanced presence detection system using the CMOS infrared (CIR) technology. The recent advancements on microbolometer type uncooled LWIR imaging sensor technology allowed to reduce the fabrication cost of the microbolometer type detectors and the overall wafer cost and therefore to increase the use of this technology in a number of emerging applications, including various consumer applications and advance presence detection systems for smart buildings and smart office...
A Distributed Fault-Tolerant Topology Control Algorithm for Heterogeneous Wireless Sensor Networks
Bagci, Hakki; KÖRPEOĞLU, İBRAHİM; Yazıcı, Adnan (Institute of Electrical and Electronics Engineers (IEEE), 2015-04-01)
This paper introduces a distributed fault-tolerant topology control algorithm, called the Disjoint Path Vector (DPV), for heterogeneous wireless sensor networks composed of a large number of sensor nodes with limited energy and computing capability and several supernodes with unlimited energy resources. The DPV algorithm addresses the k-degree Anycast Topology Control problem where the main objective is to assign each sensor's transmission range such that each has at least k-vertex-disjoint paths to superno...
Citation Formats
M. Özkan, “A Digital signal processor based development platform for thermal imagers ,” M.S. - Master of Science, Middle East Technical University, 2003.