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Definition
Active sensors are those whose generalized viewpoint (such as sensor aperture, position, and orientation) is under computer control. Control is done so as to improve information gathering and processing.
Background
The generalized viewpoint [1] of a sensor is the vector of values of the parameters that are under the control of the observer and which affect the imaging process. Most often, these parameters will be the position and orientation of the image sensor, but may also include such parameters as the focal length, aperture width, and the nodal point to image plane distance, of the camera. The definition of generalized viewpoint can be extended to include illuminant degrees of freedom, such as the illuminant position, wavelength, intensity, spatial distribution (for structured light applications), and angular distribution (e.g., collimation) [2].
Changes in observer viewpoint are used in...
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References
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Clark, J.J. (2014). Active Sensor (Eye) Movement Control. In: Ikeuchi, K. (eds) Computer Vision. Springer, Boston, MA. https://doi.org/10.1007/978-0-387-31439-6_278
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DOI: https://doi.org/10.1007/978-0-387-31439-6_278
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