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 at least one object in a background image, comprising the step of passively acquiring the data by comparing capturing composite images of the object and first and second spaced-apart foreground grids or patterns, and determining a distance to said object based on shifts in positions or sizes of said objects relative to said first and second grids or patterns.
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Accused Products
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, and/or on comparison of changes in positions of the background object relative to the grid as the position of the grid in a direction perpendicular to the direction of the background object is varied.
31 Citations
32 Claims
- 1. A method of acquiring data correlated with three-dimensional geometric features or location of at least one object in a background image, comprising the step of passively acquiring the data by comparing capturing composite images of the object and first and second spaced-apart foreground grids or patterns, and determining a distance to said object based on shifts in positions or sizes of said objects relative to said first and second grids or patterns.
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8. 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 first composite image of a background object and a first foreground pattern or grid;
b. Capturing a second composite image of the object and a second foreground pattern or grid that is spaced from the first foreground pattern or grid;
c. Comparing the relative sizes or positions of features of the background object and the foreground in the two composite images relative to a fixed set of coordinates established by said foreground patterns or grids. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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- 15. A system for acquiring data correlated with three-dimensional geometric features or location of a subject, comprising a camera arrangement for capturing two composite images of a background object through a foreground pattern at different positions relative to the background object, and means for comparing the two composite images in order to determine the amount by which sizes or dimensions of the background change relative to dimensions of the foreground image at said different positions.
Specification