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Patent

Distance calculation device and distance calculation method

TLDR
In this article, a distance calculation device is provided with a monocular estimated-distance calculation unit (203) that calculates the estimated distance to the subject to be measured on the basis of an image picked up by a camera (101, 102), a stereo estimated distance measurement unit (204), and an output distance calculation unit(206), which is calculated on the ground truth images collected by at least two cameras.
Abstract
In order to carry out distance measurement at less than the disparity resolving power of a stereo camera, and carry out fine measurement of the relative distance to a subject even when the reliability of the images picked up by the cameras has deteriorated, a distance calculation device is provided with a monocular estimated-distance calculation unit (203) that calculates the estimated distance to the subject to be measured on the basis of an image picked up by a camera (101), a stereo estimated-distance calculation unit (204) that calculates the estimated distance to the subject to be measured on the basis of images picked up by at least two cameras (101, 102), and an output distance calculation unit (206) that calculates an output distance to the subject to be measured. The outputting distance calculation unit (206) calculates the output distance on the basis of the estimated-distance calculated by the monocular estimated-distance calculation unit, the estimated-distance calculated by the stereo estimated-distance measurement unit, and the weighting of both the estimated-distances determined according to the confidence of the stereo estimated-distance measurement unit, which is calculated on the basis of the images picked up by the at least two cameras.

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References
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Proceedings Article

Depth estimation using monocular and stereo cues

TL;DR: This paper shows that by adding monocular cues to stereo (triangulation) ones, it is shown that significantly more accurate depth estimates are obtained than is possible using either monocular or stereo cues alone.
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