2 research outputs found
Human Motion Analysis Using Very Few Inertial Measurement Units
Realistic character animation and human motion analysis have become major topics of research. In this doctoral research work, three different aspects of human motion analysis and synthesis have been explored. Firstly, on the level of better management of tens of gigabytes of publicly available human motion capture data sets, a relational database approach has been proposed. We show that organizing motion capture data in a relational database provides several benefits such as centralized access to major freely available mocap data sets, fast search and retrieval of data, annotations based retrieval of contents, entertaining data from non-mocap sensor modalities etc. Moreover, the same idea is also proposed for managing quadruped motion capture data. Secondly, a new method of full body human motion reconstruction using very sparse configuration of sensors is proposed. In this setup, two sensor are attached to the upper extremities and one sensor is attached to the lower trunk. The lower trunk sensor is used to estimate ground contacts, which are later used in the reconstruction process along with the low dimensional inputs from the sensors attached to the upper extremities. The reconstruction results of the proposed method have been compared with the reconstruction results of the existing approaches and it has been observed that the proposed method generates lower average reconstruction errors. Thirdly, in the field of human motion analysis, a novel method of estimation of human soft biometrics such as gender, height, and age from the inertial data of a simple human walk is proposed. The proposed method extracts several features from the time and frequency domains for each individual step. A random forest classifier is fed with the extracted features in order to estimate the soft biometrics of a human. The results of classification have shown that it is possible with a higher accuracy to estimate the gender, height, and age of a human from the inertial data of a single step of his/her walk
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Scanner Epistemologies: Mediations of the Material and Virtual
Across many everyday contexts and technological devices, we encounter over and over againa mechanical-translation act called scanning, performed by flatbed scanners, photocopiers,barcode readers, televisions, x-ray airport security scanners, fax machines, retinal eyescanning, MRI scanning, ultra-sonography, and earth-orbiting satellite imaging. What all ofthese separate devices have in common is the same core technological mechanism and modeof action—the mapping of differences along a surface to be known by a lensless apparatusthat detects via probe-signals. Despite being mobilized to very different uses and within alarge diversity of networks and media assemblages, scanners arise from a commongenealogical source—the conceptual union of photography to telegraphy. Scanners appeareverywhere in our modern infrastructure. It is impossible to avoid these devices, as theymediate even the most basic transactions in everyday life, such as purchasing food at thegrocery store or checking out a book at a college library. Yet neither historians of technologynor media scholars have addressed this quotidian device which enables so much of modernbureaucracy in business, government and education to function. While the scanner’s absencefrom the landscape of critical thought precisely marks the problem of the unremarkable inviour scholarship, the metaphor of scanning remains present in both common and scholarlydiscourse. Scanning may, at various times, stand in for a model of attention, a form ofreading, or serve as a simile for searching and/or diagnosing. The imagination of the scanwell precedes its appearance as a technology, which further indicates the necessity ofunderstanding this unexamined medium. This dissertation project investigates the object ofthe scanner as a term for organizing the imagination and materialization of an entire suite oftechnologies that we encounter daily. Conceived as a social history of technology married toa film and media studies paradigm, this dissertation examines the scanner as a form ofmachine-perception that, while it extends the dominant conception of the camera-prosthesis,stands as its own unique model of perceptual mediation. The scanner remains unique inmedia studies because so much of its identity depends upon the place it holds within thehistorical conditions of the intermedial assemblage in which it has been mobilized. Through aseries of case studies in which I loosely divide scanning technologies into genres ofperceptual and epistemological function, I triangulate the epistemic role of the scanner ineach of its respective media networks