Browsing International Telemetering Conference Proceedings, Volume 50 (2014) by Subjects
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A Duel Compression Ethernet Camera Solution for Airborne ApplicationsCamera technology is now ubiquitous with smartphones, laptops, automotive and industrial applications frequently utilizing high resolution imagine sensors. Increasingly there is a demand for high-definition cameras in the aerospace market - however, such cameras must have several considerations that do not apply to average consumer use including high reliability and being ruggedized for harsh environments. A significant issue is managing the large volumes of data that one or more HD cameras produce. One method of addressing this issue is to use compression algorithms that reduce video bandwidth. This can be achieved with dedicated compression units or modules within data acquisition systems. For flight test applications it is important that data from cameras is available for telemetry and coherently synchronized while also being available for storage. Ideally the data in the telemetry steam should be highly compressed to preserve downlink bandwidth while the recorded data is lightly compressed to provide maximum quality for onboard/ post flight analysis. This paper discusses the requirements for airborne applications and presents an innovative solution using Ethernet cameras with integrated compression that outputs two steams of data. This removes the need for dedicated video and compression units while offering all the features of such including switching camera sources and optimized video streams.
Photo- and Video-Based Ranging and ModelingIn this paper, we present our research on photo- and video-based 3D ranging and modeling. We have constructed such a 3D ranging and modeling system, PhotoModel3D, that was made available for free, non-commercial use over the Web. The system has received over a hundred thousands Web visits and thousands of use in the past two years alone. Currently, we demo 900 3D models thus constructed using photos and videos contributed from anonymous users all over the world. Here, we describe the algorithms used in the 3D pipeline and present the results of a comparison study and an accuracy analysis of its performance.