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We present a low-cost stereo vision implementation suitable for use in autonomous vehicle applications and designed with agricultural applications in mind. This implementation utilizes the Census transform algorithm to calculate depth maps from a stereo pair of automotive-grade CMOS cameras. The final prototype utilizes commodity hardware, including a(More)
1. SUMMARY Google's App Inventor for Android (AIA) is a visual programming environment for creating mobile phone applications that is designed to be accessible and appealing to college non-majors taking introductory courses in computer science. Specifically, AIA provides a development environment similar to StarLogo TNG [7], Scratch [5], and Alice [2] but(More)
Mobile phone services based on the location of a user have increased in popularity and importance, particularly with the proliferation of feature-rich smartphones. One major obstacle to the widespread use of location-based services is the limited battery life of these mobile devices and the high power costs of many existing approaches. We demonstrate the(More)
We present an indoor wireless localization system that is capable of room-level localization based solely on 802.11 network signal strengths and user-supplied training data. Our system naturally gathers dense data in places that users frequent while ignoring unvisited areas. By utilizing users, we create a comprehensive localization system that requires(More)
The Hilbert Huang Transform is a new technique for the analysis of non–stationary signals. It comprises two distinct parts: Empirical Mode Decomposition (EMD) and the Hilbert Transform of each of the modes found from the first step to produce a Hilbert Spectrum. The EMD is an adaptive decomposition of the data, which results in the extraction of Intrinsic(More)
— Currently, few tools exist to aid the hardware developer in translating an algorithm designed for a general-purpose processor into one that is precision-optimized for custom logic. This task requires extensive knowledge of both the algorithm and the target hardware. We present a design-time tool, Précis, which assists the developer in analyzing the(More)
In this paper, we present a method for FPGA datapath precision optimization subject to user-defined area and error constraints. This work builds upon our previous research which presented a methodology for optimizing the dynamic range- the most significant bit position. In this work, we present an automated optimization technique for the least-significant(More)
We present a parameterized stereo vision core suitable for a wide range of FPGA targets and stereo vision applications. By enabling easy tuning of algorithm parameters, our system allows for rapid exploration of the design space and simpler implementation of high-performance stereo vision systems. This implementation utilizes the Census Transform algorithm(More)