Camera calibration apparatus and methods
First Claim
1. A camera calibration apparatus, comprising:
- a housing;
a first camera holder including a view opening through which an interior portion of the housing is visible or viewing window through which the interior portion of the housing is visible;
a first test pattern including a first test pattern portion, said first test pattern portion being positioned along a first sidewall portion of the housing, said first sidewall portion extending at an angle away from said first camera holder and to the left or right of said first camera holder;
a first mirror for reflecting an image of the first test pattern to a camera in said first camera holder when said first mirror is in a first position physically in front of and physically facing both i) said first camera holder and ii) said first test pattern;
a moveable support structure, said first mirror being mounted on a first side of said moveable support structure;
a second test pattern mounted on a second side of said moveable support structure;
a motor attached to said movable support structure for driving said moveable support structure between different positions, said different positions including a first position in which said first mirror faces said first test pattern and said first camera holder and a second position in which said second test pattern faces said first camera holder; and
a second mirror mounted on a first sidewall of the housing in which said moveable support structure is positioned;
wherein said motor is also for driving said movable support structure to a third position in which said first test pattern is reflected in said first and second mirrors making the reflection visible to a camera in said first camera holder;
wherein said motor is mounted in a roof of said housing; and
wherein said moveable support structure is mounted on a shaft of said motor, said moveable support structure rotating in response to rotation of said shaft of said motor.
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Accused Products
Abstract
An exemplary camera calibration apparatus includes a movable, e.g., rotatable, support structure which is controllably positioned to allow for image capture of different test patterns and image capture of the same pattern at different distances by a mounted camera. A first test pattern is mounted on a wall, e.g., a pyramid shaped 4 sided wall formed by panels surrounding the camera under calibration. The movable support structure has a first mirror attached to a first side and has a second test pattern attached to a second side. A second mirror mounted on an internal sidewall of the calibration apparatus housing facilities a different image path distance between the camera capturing the image of the first test pattern and the first test pattern. The exemplary camera calibration apparatus is well suited for efficiently calibrating camera devices including a plurality of camera modules, e.g., optical chains, in a relatively small area.
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Citations
14 Claims
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1. A camera calibration apparatus, comprising:
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a housing; a first camera holder including a view opening through which an interior portion of the housing is visible or viewing window through which the interior portion of the housing is visible; a first test pattern including a first test pattern portion, said first test pattern portion being positioned along a first sidewall portion of the housing, said first sidewall portion extending at an angle away from said first camera holder and to the left or right of said first camera holder; a first mirror for reflecting an image of the first test pattern to a camera in said first camera holder when said first mirror is in a first position physically in front of and physically facing both i) said first camera holder and ii) said first test pattern; a moveable support structure, said first mirror being mounted on a first side of said moveable support structure; a second test pattern mounted on a second side of said moveable support structure; a motor attached to said movable support structure for driving said moveable support structure between different positions, said different positions including a first position in which said first mirror faces said first test pattern and said first camera holder and a second position in which said second test pattern faces said first camera holder; and a second mirror mounted on a first sidewall of the housing in which said moveable support structure is positioned; wherein said motor is also for driving said movable support structure to a third position in which said first test pattern is reflected in said first and second mirrors making the reflection visible to a camera in said first camera holder; wherein said motor is mounted in a roof of said housing; and wherein said moveable support structure is mounted on a shaft of said motor, said moveable support structure rotating in response to rotation of said shaft of said motor. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification