Assessing Performance of Aerobic Routines using Background Subtraction and Intersected Image Region

It is recommended for a novice person to engage trained personnel before starting an unfamiliar aerobic or weight routine to gain real-time expert feedbacks. This greatly reduces the risk of injury and maximise physical gains. We present a simple image similarity measure based on intersected image region to assess a subject's performance of an aerobic routine. The method was implemented inside an Augmented Reality (AR) desktop app that employed a single RGB camera to capture still images of the subject as he or she progressed through the routine. The background-subtracted body pose image was compared against the exemplar image (i.e., AR template) at specific intervals. Based on a limited dataset, our pose matching function managed an accuracy of 93.67

The development and applications of a system designed to quantify coronary arterial stenosis

The objective analysis of coronary artery stenosis is required for the assessment of interventions in the management of Coronary Artery Disease (CAD). This thesis presents a microcomputer-based system designed to meet this requirement which is easy to use and relatively cheap. The hardware consists of a standard 35 mm cine-projector (International General Electric Company), a rear projection graphics tablet (GTCO Corporation) and microcomputer (Vector Graphic Limited) with printer (Epson Limited). The graphics tablet and projector are mounted into a steel framework which allows an arteriographic image to be cast from the rear of the projector and focused, parallax free, onto the centre of the tablet. The tablet in turn communicates with the computer via a RS232 link. [Continues.

Development of Novel Image Analysis Methods for the Morphological Quantification of Filamentous Fungi

Mycelial morphology is a critically important process property in fermentations of lamentous micro-organisms, as particular phenotypes are associated with maximum productivity. The design of systems capable of rapidly and accurately characterising morphology within a given process represents a signi cant challenge to biotechnologists, as the complex phenotypes that are manifested are often not easily quanti ed. A system has been developed for high-resolution characterisation of lamentous fungal growth, using membrane immobilization and fully-automatic imageprocessing software. The system has been used to quantify the early-stage hyphal di erentiation of Aspergillus oryzae on solid substrates, by measuring spore projected area and circularity, the total length of a hyphal element, the number of tips per element, and the hyphal growth unit. Spore swelling expressed as an increase in mean equivalent spore diameter was found to be approximately linear with time. Widespread germination of spores was observed by 8 h after inoculation. From approximately 16 h, the number of tips was found to increase exponentially. The speci c growth rate, maximum hyphal tip extension rate and speci c branching frequency of a population of hyphae were calculated as approximately 0.27 h-1, 27 um tip-1 h-1 and 2:3x 10- 3 tips um-1 h-1 respectively. The robustness of the image-analysis system was veri ed by testing the e ect of small variations in the input parameters. Subsequent experimentation focussed on investigating the morphological development of A. oryzae in submerged culture and the associated in uence on -amylase production. The temporal variation in pellet structure and -amylase production over time was quanti ed and the potential for the use of membrane-immobilisation in submerged culture was examined. Variation in carbon source type had little morphological impact, although increasing starch concentration caused a shift from a pelleted form to dispersed, `pulp-like\u27 growth. Increasing inoculum concentration was found to result in a decrease in mean pellet diameter and an increase in -amylase production. The supplementation of fermentation media with non-ionic detergents caused a signi cant increase in -amylase production (up to 149%), but this increase did not seem to be related to observed morphological variation. Recently, fractal geometry has been employed in the study of lamentous microbes, but a clear link between fractal dimension and branching behaviour has not been demonstrated. This thesis presents an alternative means of enumerating the fractal dimension of fungal mycelial structures, by generating a `fractal signal\u27 from an object boundary. In the analysis of a population of A. oryzae mycelia, both fractal dimension and hyphal growth unit were found to increase together over time, while cultivating populations of Penicillium chrysogenum and A. oryzae mycelia under a variety of di erent conditions revealed a strong correlation between fractal dimension and hyphal growth unit. The technique has the potential to be adapted and applied to any morphological form that may be encountered in a fermentation process, providing a universally-applicable parameter for more complete data acquisition

MATLAB

A well-known statement says that the PID controller is the "bread and butter" of the control engineer. This is indeed true, from a scientific standpoint. However, nowadays, in the era of computer science, when the paper and pencil have been replaced by the keyboard and the display of computers, one may equally say that MATLAB is the "bread" in the above statement. MATLAB has became a de facto tool for the modern system engineer. This book is written for both engineering students, as well as for practicing engineers. The wide range of applications in which MATLAB is the working framework, shows that it is a powerful, comprehensive and easy-to-use environment for performing technical computations. The book includes various excellent applications in which MATLAB is employed: from pure algebraic computations to data acquisition in real-life experiments, from control strategies to image processing algorithms, from graphical user interface design for educational purposes to Simulink embedded systems