APPARATUS FOR MEASURING THREE-DIMENSIONAL POSITION, METHOD THEREOF, AND PROGRAM

• US 20130163883A1
• Filed: 12/26/2012
• Published: 06/27/2013
• Est. Priority Date: 12/27/2011
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Takemoto, Kazuki
• Granted Patent: US 9,141,873 B2
• Time in Patent Office: Days
• US Class Current: 382/199
• CPC Class Codes: G06V 10/421 by analysing segments intersecting the pattern
• CPC Class Codes: G06V 40/11 Hand-related biometrics; Hand pose recognition

Abstract

An information processing apparatus includes an input unit configured to input a plurality of images captured from a plurality of viewpoints, an extraction unit configured to extract a region of an object from each of the plurality of images, an acquisition unit configured to obtain a contour from the region of the object, a smoothing unit configured to perform smoothing of the contour based on a point group on the obtained contour, a correlation unit configured to correlate regions of the object extracted from respective ones of the plurality of images, and a calculation unit configured to calculate a position of the object based on information of regions correlated by the correlation unit and the point group obtained by the smoothing unit.

Claims

1. An information processing apparatus comprising:

an input unit configured to input a plurality of images captured from a plurality of viewpoints;

an extraction unit configured to extract a region of an object from each of the plurality of images;

an acquisition unit configured to obtain a contour from the region of the object;

a smoothing unit configured to perform smoothing of the contour based on a point group on the obtained contour;

a correlation unit configured to correlate regions of the object extracted from respective ones of the plurality of images; and

a calculation unit configured to calculate a position of the object based on information of regions correlated by the correlation unit and the point group obtained by the smoothing unit.

2. The information processing apparatus according to claim 1, wherein the calculation unit calculates, based on three-dimensional vertex information of a target object which is calculated based on correspondence information of extracted regions obtained by the correlation unit and a point group calculated in a process performed by the smoothing unit, a three-dimensional position of the object.

3. The information processing apparatus according to claim 1, wherein the smoothing unit smoothes the contour by connecting points in the point group on the contour by line segments.

4. The information processing apparatus according to claim 3, wherein the smoothing unit recursively segments the contour and sets segmentation points as the point group.

5. The information processing apparatus according to claim 1, wherein the extraction unit extracts a region of the object based on color information.

6. The information processing apparatus according to claim 1, wherein the correlation unit sets scanning lines that pass through same positions among the plurality of images, and detects corresponding points between the plurality of images based on intersections between the scanning lines and the smoothed contours.

7. A method for performing information processing comprising:

inputting a plurality of images captured from a plurality of viewpoints;

extracting a region of an object from each of the plurality of images;

obtaining a contour from the region of the object;

smoothing the contour based on a point group on the obtained contour;

correlating regions of the object extracted from respective ones of the plurality of images; and

calculating a position of the object based on information of the correlated regions and the point group obtained by the smoothing.

8. A computer-readable storage medium storing a program for causing a computer to perform each processing in a method according to claim 7.