Log In
Sign Up
Find a Lawyer
Ask a Lawyer
Research the Law
Law Schools
Laws & Regs
Newsletters
Marketing Solutions
Justia Connect
Pro Membership
Basic Membership
Justia Lawyer Directory
Platinum Placements
Gold Placements
Justia Elevate
SEO
Websites
Blogs
Justia Amplify
PPC Management
Google Business Profile
Social Media
Justia Onward Blog
Justia
Patents
Patents Assigned to VisionTools Bildanalyse Systeme GmbH
Patents Assigned to VisionTools Bildanalyse Systeme GmbH
Creation of a range image
Patent number:
7804585
Abstract:
The most difficult problem in the creation of a range image with stereo cameras is the establishing of the correspondence of the points. For this, the scene is illuminated twice; thereof at least once with a random or pseudo random pattern. For both cameras, an image is taken for each of the illuminations and the quotient of brightnesses is calculated pixelwise. The correspondence is established on the basis of a comparison of the quotient of pixels on epipolar lines of different cameras. The illumination pattern is preferably highly modulated along the epipolar line; transversally or diagonally to it, it is not or only slightly modulated. For illumination, a projection unit is used which in a preferred arrangement comprises two superposed grating patterns which have a distance (d) to each other, with at least one varying in a pseudo random manner, and with two closely neighboring light sources which shine through the gratings and thereby generate different pseudo random patterns, especially moiré patterns.
Type:
Grant
Filed:
November 3, 2006
Date of Patent:
September 28, 2010
Assignee:
VisionTools Bildanalyse Systeme GmbH
Inventor:
Hermann Tropf