System and method for passive three-dimensional data acquisition
First Claim
1. A method of acquiring data correlated with three-dimensional geometric features or location of a subject, comprising the step of passively acquiring the data by comparing changes in the size of the subject relative to changes in the size of features of a foreground through which the background is viewed as an optical path length between the foreground and an image plane is varied.
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Abstract
A method and system of passively acquiring three-dimensional data concerning an object relies on comparison of changes in dimensions of the background object relative to changes in dimensions of a foreground pattern or patterns as the effective optical path length between the foreground patterns and a corresponding receiver or receivers is varied. The system and method of the invention may utilize a mirror having a pattern formed thereon that reflects a different set of wavelengths than the remaining surface of the mirror.
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Citations
22 Claims
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1. A method of acquiring data correlated with three-dimensional geometric features or location of a subject, comprising the step of passively acquiring the data by comparing changes in the size of the subject relative to changes in the size of features of a foreground through which the background is viewed as an optical path length between the foreground and an image plane is varied.
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2. A method of acquiring data correlated with three-dimensional geometric features or location of a subject, comprising the steps of:
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a. capturing a composite image of a background object and a foreground pattern at a first distance from an image plane;
b. capturing a composite image of the background and foreground in which the foreground pattern is situated at a second distance from an image plane;
c. comparing the relative sizes of features of the background object and the foreground pattern in the two composite images relative to a fixed set of coordinates. - View Dependent Claims (3, 4)
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- 5. A system for acquiring data correlated with three-dimensional geometric features or location of a subject, comprising a camera arranged to capture two composite images of a background object through a foreground pattern at different focal lengths, and means for comparing the two composite images in order to determine the amount by which dimensions of the background change relative to dimensions of the foreground image as the focal length is changed.
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21. A mirror construction, comprising:
a mirror surface having a reflective pattern formed thereon, wherein the pattern reflects a different set of frequencies than portions of the mirror surface that do not have the pattern formed thereon. - View Dependent Claims (22)
Specification