Title :
Passive ranging for acquisition of range images: applications to longitudinal vehicle control and warning systems
Author :
Johnson, G.E. ; Dowski, E.R. ; Cathey, W.T.
Author_Institution :
Dept. of Electr. & Comput. Eng., Colorado Univ., Boulder, CO, USA
Abstract :
A single-lens, single-aperture passive range-imaging system has been developed based on wavefront coding of incoherent images using a standard CCD camera and lens, and a phase mask. Two-dimensional range images or point-measurements of range may be derived using fast spectral estimators, enabling efficient, real-time, range determination. Theoretical limits available for the errors of the estimator provide powerful design and evaluation tools. Such a sensor could prove useful in longitudinal control systems (i.e. adaptive cruise control) by providing wide-field, real-time range data. Other applications include object detection for collision avoidance and backup- or blind-spot warning systems
Keywords :
CCD image sensors; automated highways; distance measurement; object detection; velocity measurement; CCD camera; adaptive cruise control; backup warning systems; blind-spot warning systems; collision avoidance; fast spectral estimators; incoherent images; longitudinal vehicle control; object detection; passive ranging; phase mask; point-measurements; range images acquisition; single-lens single-aperture passive range-imaging system; two-dimensional range images; wavefront coding; Adaptive control; Adaptive systems; Charge coupled devices; Charge-coupled image sensors; Control systems; Image coding; Lenses; Programmable control; Sensor systems; Standards development;
Conference_Titel :
Intelligent Transportation System, 1997. ITSC '97., IEEE Conference on
Conference_Location :
Boston, MA
Print_ISBN :
0-7803-4269-0
DOI :
10.1109/ITSC.1997.660551
