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More and more uncooled terahertz (THz) real-time imaging cameras are being developed and commercialized. For image analysis, the characterization of the optical performance is an important issue. We tested the TZCam camera that integrates the CEA-Leti based on micro-bolometer array coupled to antennas and a resonant cavity structure, and equipped with a terahertz objective. A numerical tool kit has...
In this article we present a new method for measuring the misalignment distortion caused by the lenses of the system used as a visual interface for a Nikon 6B autocollimator. This interface is used for making angle measurements using image processing techniques. This research paper studies the interaction between the optical systems of the interface's camera and the autocollimator. With the proposed...
The application of imaging devices in underwater environments has become a common practice. Protecting the camera's constituent electric parts against water leads to refractive effects emanating from the water-glass-air transition of light rays. These non-linear distortions can not be modeled by the pinhole camera model. For our new approach we focus on flat interface systems. By handling refractive...
We developed an optical high-speed image rotation controller and realized a high-speed roll camera that is able to cancel the rotational motion blur of a rotating target. This system is composed of a hollow motor, a Dove prism, and a high-speed camera and controls optical image rotation according to the target rotation by using high-speed image processing. This so-called optical lever formed of the...
An important step in the analysis and interpretation of video scenes for recognizing scenario is the aberration corrections introduced during the image acquisition in order to provide and correct real image data. This paper presents an approach on distortion correction based on stereoscopic self-calibration from images sequences by using a multi-camera system of vision (network cameras). This approach...
Omnidirectional vision (omni-vision) with a fisheye lens holds promise of various applications such as global surveillance, robotic navigation and so on. The calibration for the vision system and correction for the distorted image are critical procedure. One method for calibrating the omni-vision system is proposed. The approach involves the utilities of a cylinder on which inner wall there are several...
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